Tag Archives: Printed Circuit Board

PCB fabrication using green Soldermask

PCB fabrication using green Soldermask?

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How to use green Soldermask in pcb fabrication.

As we know that printed circuit boards are the building blocks of electronic devices. It is not wrong if we say that the electronic industry is relying on the quality of printed circuit boards in order to provide better functionality and performance. Now let us move forward with the fact that the printed circuit board is something we need to understand first if we are talking about electronics. Maybe you have seen one in your computer or other commonly used gadgets. What color came to mind? Let me guess! Is it a green board we usually see on our computers? Yes! Printed circuit boards are usually designed in this color. Although there are many other colors available, a vast majority of circuits are designed in green color.

There are a number of reasons for choosing green and we will discuss it further.
But before that let us make one thing clear. The green color of the PC board doesn’t mean that it is green all the way through. It is the outer part that is visible. And that other part is the solder mask of the circuit. So now we have another point. If you want to understand the color philosophy of the circuit, you need to understand what solder masking is. And why it is needed in the circuit.

In the manufacturing process of printed circuit boards, the copper circuitry is etched on the glass fiber interior. This circuitry helps the circuit in avoiding short circuits and soldering errors. The hue of the solder mask is used to protect that copper circuitry and it is the reason that the printed circuit board looks green. But the green color can be modified according to the need and to differentiate multiple printed circuit boards. For example, there is variation in the circuitry of colors provided by design companies. Black, blue, green, and red is provided as standard and commercial color for the solder masking. The electrical traces inside the board are shielded from contamination and moisture with the help of the solder mask.

Moreover, it helps in regulating the process of molten solder flux. There is a plain drab and yellow core of the conventional FR-4 circuits. But there is a variation for the solder masking. We have a number of colors available for solder masking such as white, black, blue, red, and yellow and usually decided during the PCB design portion of the job. Moreover, it is interesting to know that many uncommon colors are also in the hue list such as purple, orange, smooth, red, etc. similarly most combined colors are also available as an extravagant for the boards. So now when we have known that the number of choices is available then the question is even more strongly that why green? Or you can simply say why green is preferred when we have other choices too.

Now we are going to see the reasons why green is the most commonly used color for the solder masking of the printed circuit boards. There are a number of reasons, and we will see the important ones.

Reasons for the green color of PCB

In the early era of technical constraints, humans were controlling the quality of the circuit manually by verifying the board. So, many factors explain the green color of the PCB. As we have discussed before the green color means only the exterior of the printed circuit board. This does not mean that the inner PCB would also be of the same color. The exterior sheet is solder masking.

There are a number of factors that affect the copper traces present inside the circuit board such as oxidation, humidity, contamination, and FOD. The solder mask is the role that reduces the chance of these effects on the circuit board. Now let’s see the reasons for overlying the green sheet over the exterior sheet of the printed circuit board.

Visually relieve color:

Colors may relieve you or exhaust you depending upon their tendency to affect your sight. It may exhaust your min dot work on tiny circuits. But it is proved by psychologists and neurologists that the spectrum of green color has a relieving and smoothie impact on your body and mind. The green color may help in relieving tiredness and fatigue. Squinting at the tiny circuit is difficult but green wavelength has relaxing effects on the body, so it is easy to work on this layer.

Moreover, it is medically proved that the human eyes and cones are most sensitive to the green color. It is easy to distinguish green color as the eyes are robust to green color. Therefore, the traces, empty areas, silkscreens, electrodes, pads, and printings have greater contrast especially during the pcb assembly process. It is easy to detect the flaws in the outer layer if one looks simply at the outer layer. This is easy because of the color contrast used in the outer layer. If you compare the green color solder mask with others such as white, black, red. You will notice that it is easy to distinguish spots in the green color because of high contrasts. Although there are a number of techniques that are being used for spot detection such as flying probe technique and automatic optical inspection. These techniques are highly effective in spotting errors. But the technical reason for using green color remains the same.

Physical superiority of green color:

R&D is preferring green color for making high-quality solder mask oils because of the typical convention of using green hues. The functionality of the resin is impacted in the duration and the actual environment by organic chemical pigmentation. When the demand is reaching the limitation then there is no restriction for choosing a pink board. But the fact is, no other color in the aesthetic palette possesses the qualities same as green color. Moreover, the solder mask dams of 0.1mm can only be produced reliably by commercial green color. On the other hand, 0.12mm can be achieved by red, blue and yellow.

Additionally white and black can produce 0.15mm dams. Solder mask dams play an important role in fine pitch components and integrated circuits. Both ICs and fine pitch components are essential in shielding solder masks from forming.
It is also interesting to know that chlorine is the basis of the green color in the green solder oil. Halogens are made in PCB substrate when chlorine is combined with bromine. Halogens have a severe impact on health and also affect the environment if disposed of inappropriately. But you can also go for halogen-free solder masks as they are also available in the market. But you have to switch to some other color for a halogen-free solder mask.

Cost:

Silkscreen techniques are used when we need to apply solder masking. Across the screen mesh, a large glob of oil is dragged. There is a circuit board underneath which is sent for the curing and another board is pulled under the solder mesh. But there is a pause if you want to apply another color. Because for this purpose you need to wash the silkscreen in order to remove excess oil from the solder mask and then you can apply a new color. Moreover, you need a silkscreen station for each color.

The cost of the circuit board would be affected if you are changing color, increasing the thickness of the board, using multiple pictures, and increasing the number of possible combinations. The wastage of material would also be increased in this way. If the industry is not refusing to take your circuit board, even then you are paying more than your budget in this case which is of course not a good choice. But you can save your cost if you are going for the commercial green colors and their features. Moreover, you should also keep in mind that making a new solder mask that is visually appealing, cures well, applies, and adheres well and a good insulator is not an easy process at all. For your special request such as for matte color, you need to pay an extra amount.

So, there are a number of choices available for you to consider in the case of the colors of the printed circuit board. Every color has its pros and cons. Commonly green is preferred because of its efficiency over other colors but you can choose as per your need.

PNC is the market leader in providing cost-effective pcb assembly services. Just email us at sales@pnconline.com to get your query sorted.

10 Most Commonly Used Components in PCB Assembly

10 Most Commonly Used Components in PCB Assembly

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How many times in a day do you generally catch yourself using an electronic gadget? Maybe a hundred times like right now. Although we are living with these electronic gadgets, understanding the mystery behind the electronics is still a mystery that needs to be resolved. It is not that difficult to understand the basic functionality and structure of every electronic device.

The reason is almost every electronic device tends to have some similar basic elements in its infrastructure. But still, it seems difficult to understand the working of the electronic device because nothing is happening in front of the eyes visually. Despite all of the facts, it is still interesting to read and understand about electronics. Moreover, it is not unthinkable to start building various electronics projects with a little background knowledge.

Now, let’s move to the very basic and essential part of the electronic industry, and let’s discuss its details so we can understand it well. And that basic thing is the printed circuit board (PCB).

What is a PCB?

Have you ever seen a building? What is it made of? Blocks of bricks, right? Similarly, an electronic device is made up of blocks known as printed circuit boards. The main advantage of a printed circuit board is that it helps in connecting the various components of electronic devices to build a cohesive system that offers power to different devices.

Just like a building designed as top floors, ground floors, rooms, balconies, printed circuit boards are designed to make a connection between different parts of the building (electronic device). And this connection then provides a fully functional electronic system that is capable of providing power to the other devices.

For the past couple of years, printed circuit boards have been used in various electronic devices to improve their functionality and quality. Moreover, these circuit boards make the device more reliable and easier to use. Depending on the type of device, a printed circuit board can be single layer to multiple layers. Generally, multilayer printed circuit boards are used for complex devices. Multiple layers circuit boards also have complex structures. Now let’s understand the structure of printed circuit boards.

What are the components of a PC board?

As we have discussed before, printed circuit boards are the building blocks of any electronic device. That’s why they are made up of different electronic components depending on the functionality of the device they will belong to. These components play a smooth role in the better functionality of the device. If any of the components fail, the entire system would fail and as result, the quality of the product would be affected. So effective functionality from each component is required for better working of the device.
Following are the commonly used components in a printed circuit board. The components mentioned below are just for beginners because as we have mentioned before, the multilayer circuit board will have a complex structure. Mostly used components in a printed circuit board are discussed below:

Capacitor:
As you already know that capacitors are used when we need to store electrical energy. Capacitors are essential for storing energy and you will find it on every printed circuit board. A range of electric charges is stored in a capacitor, and they act like storage space or a battery for the circuit board. The capacitor can gain and lose full charge that’s why they are used in the filter process. In this process, an electric device can use the backup source of energy if it loses the main source so that it does not lose the data. Capacitors release the energy when the device needs power. There are various types of capacitors available such as ceramic capacitors, polyester capacitors, and radial capacitors. The categorization of the capacitor is done on the basis of the insulating material used in them.

Resistors:
Resistors are commonly considered the first and essential part of any circuit board. They are used to control energy flow with the device. They are also referred to as the foundation of current control. Electric current is transmitted, and heat is dissipated in the resistors. They provide ease to the electric flow in the electronic devices. The level of resistance of the object can be defined by analyzing its resistance. The flow of electrical energy is resisted to form heat and what is then dissipated. There is a wide variety of resistors. The recommended resistors for the beginner are made of carbon film. The different colors in the body of the resistors show the resistance value.

Inductors:
Inductors are also used to store energy. So, we can say that they are similar to capacitors in nature. The energy is stored in the form of a magnetic field. This magnetic field is generated with the flow of electric current within the device. Moreover, inductors are also used when we need to block some signals. For example, interfering with the flow of signals from another device.

Transformers:
As clear from anime, transformers are used to transform energy from one power source to another. The induction process is used for this purpose. Similarly, transformers are used in printed circuit boards for transforming energy. The electrical is transferred from different circuits and then converted according to the need by increasing or decreasing the voltage. This function is somehow the same as the resistor as it regulates the current. But transforming current provides more electric isolation than a normal resistor. There are two windings (soft inductive circuits) and an iron core in the transformer. Both winding act as sender and receiver accordingly. The primary winding is the source of the energy, and the secondary winding is where the energy will go. The large voltage of energy is broken down into smaller parts by transforming so that the device or the equipment would not be overloaded. This helps in achieving the manageable flow of the electric charges in the circuit.

Diodes:
A Diode works in the same manner as the resistors. Electrical resistance is used to control the flow of the current. They assign a specific way for the high and low resistance. The hi8gh resistance is offered on one side and zero resistance on the other side. In this way, electrical current can be managed from flowing in the wrong direction. Because the wrong direction of the flow can also damage the functionality of the device and the equipment. The most common type of diode that you may have seen is light-emitting diodes (LEDs). Moreover, Zinner, high-speed switching diodes are also available and used for different purposes.

Transistors:
Transistors are used to amplify energy. Transistors are fundamental to all the new electronics. Their role is vital and sometimes they are referred to as the building blocks of the electronic device. A commonly used transistor known as a bipolar transistor can amplify current in three different directions as it has three areas and three pins. Bipolar transistors are further categorized into NPN and PNP types. Both types are made up of base, collector, and emitter. The switching and controlling of the electric current in the circuit are done by the transistors.

ICs (Integrated Circuits):
As clear from the name, integrated circuits are smaller circuits that are placed in the printed circuit board by minimizing the size. They are made up of silicon and then covered with plastic. The calculation is performed by using analog technology in modern integrated circuits. Integrated circuits are the source of energy for printed circuit boards. They provide power consistently that’s why they are also called the powerhouse of the PC Board. Transistors, resistors, and capacitors are collected in ICs as they can oscillate, amplify and process the energy within the circuit.

Batteries:
As it is clear from the name, batteries are used as a source of power in the PCBA. This is probably the most purchased component for the printed circuit board and is generally used by non-electrical people as well. The main function of the battery in the printed circuit board is to convert chemical energy into electrical energy so that power can be provided to different components of the board. An external circuit is used by them for the flow of electrons from one electrode to another.

Sensors:
Sensors are used when we need to analyze the change. They sense the change in the environment. The electrical signal is generated according to the change that has been detected. The signal is then sent to other components of the board.

Switches:
Switches are the power buttons of the printed circuit board and are used by non-engineers, the same as batteries. Switches are used for a variety of purposes but in pcb assembly, their function is to control the flow of the current. The flow can be managed by opening and closing the circuit. Push-button switches, toggle switches, and micro switches are commonly used types for the circuit board.

PNC is the leading brand in terms of providing a turnkey solution for all your PCB-related requirements. Interested in pcb assembly services? Just write us at sales@pnconline.com

Printed Circuit Board Signal Conditioning Process

Printed Circuit Board Signal Conditioning Process

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The process of data acquisition is known as signal processing. This acquisition is done by an instrument which is known as the signal conditioner. There is a conversion of signals that happened in this process. The signal conditioner converts the signal from one form such as electrical or mechanical to another form. The input signal is converted into the output signal in the signal conditioning process. Now the question may arise why do we need to convert the input signal into an output signal? The simple answer is that the signal needs to be amplified.

This amplification helps the signal to be converted into a compatible and easy-to-read form. This form of signal helps in data acquisition and machine control. Analog signals are converted into digital signals but before that, correct preparation is made. In the signal conditioning process, we manipulate a signal in a way that it can be converted and further proceed for the next step. Mechanical and environmental measurements are made in many electronic acquisitions for the measure. These measurements are done with the angle of specific sensors such as temperature and vibrations. But these sensors cannot work accurately for the measurement of the signals if the signal conditioning is not compelled yet.

Certain signals tend to have a very low voltage level. For these types of signals, amplification is required before they can be digitized properly. The best example of these signals is thermocouple signals. Some of the other sensors such as accelerometer, strain gauges, and resistance temperature detector cannot work until the excitation to operate is not completed. All these technologies are the best example of signal conditioning.

Because of its importance, we can say that signal conditional can be considered as the fundamental block of modern data acquisitions taken in consideration during the PCB design step. Physical measurement is the end goal of the data acquisition system. The following basic components are achieved by the signal conditioning process:

• Analog to digital convertor
• Sensor
• Signal conditioning
• Computer with DAQ

Use Of signal conditioning:

As discussed before, the basic task of signal conditioning is the conversion of the signal. The signals are converted from the input form to the output form. Most commonly, the input signals are of the electric type. Now why the conversion is required. This conversion is needed when the conventional signals cannot process the actual signal easily and it needs to be converted so that interpretation can be done correctly.

Frequency, electric charge, AC voltage, electric current, DC voltage, and current are basic signals that are accepted by the signal conditioning process.

A data acquisition system cannot work until it is connected to several signals and a wide variety of sensors. The arranged process is happened for the signal converting. The analog signal is taken by the signal conditioner for better manipulation. Once the signal is manipulated, it is then sent to the analog to digital converter system. The analog to the digital converted system is the end resource and it helps in digitizing the signal so it can be used in further processing. The basic purpose of the signal conditioning business is the conversion from analog to digital signals.

The digital domain is achieved by this process and this domain is then represented, displayed, stored, and analyzed. Input can be measured from a sensor that is used to measure strain, temperature, resistance, and acceleration. Moreover, the input can also be achieved by relays, switches, encoders, and clocks. A huge number of varieties can be interpreted from signal conditioners, this variety of signals include the output type.

There are some basic functionalities of the signal conditioning process. We will see the functionalities later. First, we need to understand the process of signal conditioning after the Printed Circuit board Fabrication is done.

Process of signal conditioning:

Following are the steps that are included in the signal conditioning process. The detail of every step is given for better understanding.

Step 1: Adjustment of a signal according to noise ratio:
The signal is adjusted to the noise ratio with the help of amplification and attenuation. In the electronic dictionary, you can say that amplification and attenuation are two opposite subjects. The deterioration of analog signals happens because of the background noise in the transmission process.

There comes the term signal-to-noise ratio. This means the signal strength ratio to unwanted background interference. This ratio is then increased with the help of amplification by magnifying the voltage level of the input signal. For example, in amplification, a signal of 0-1mv is converted into 0-10v.

On the other hand, in the attenuation process, the input amplitude is decreased. This process is done so that the signal can be fit in the optimal range of the device digitizer.

Step 2: removal of voltage signal for the prevention of equipment from damage:
The filtration and isolation of the input signal are required by the signal conditioning process. This is done because the unwanted background noise that is unwanted needs to be removed. Moreover, the removal of voltage signals that are far beyond the in-line digitizer is also compulsory.

There is a considerable difference in filtering and isolating processes. The filtering is done when noise needs to be rejected from a predefined frequency range. We can say that the isolation process is somehow similar. But the difference is a protection step of data acquisition and control system form the from voltage spikes is done. These voltage spikes can damage the entire data acquisition system.

Step 3: using controlled current or voltage for excitation technique:
Transducers and their subtypes require the excitation process. The operation of an active sensor is done with the help of the external sensor. A few types of signals that require external power to proceed further are strain gauges, accelerometers, transmitters, resistors, thermistors, and RTDs.

Step 4: signal linearization
Sometimes a signal cannot exhibit a linear relationship to the actual measurement. These types of signals can also be produced by some sensor equipment. To overcome this problem, we need a linearization process. As clear from the name linearization is done to optimize this signal according to the actual measurement.

The voltage of the input signal is mapped with the corresponding value requirement by physical measurement. Linearization is a very common signal connection process. The most important use of linearization is in industrial temperature measurement.

Now you have understood the process of signal conditioning in depth. Above mentioned steps need to be followed step by step for better signal conversion. Now it is necessary to understand the basic function of signal conditioning. How it is done and what are the benefits of signal conditioning.

Let’s understand the functionality and the benefits of this process now.

Functions of signal conditioners:

As we have discussed before, the main functions of signal conditioners are filtering, isolation and amplification. If these steps are not done correctly then inefficiencies and inaccuracy can happen. These can lead to incorrect output, loss of data, and other problems. So, the question arises how you can avoid these problems?

Now how would you know which type of signal conditioning is best for you? Well, the type of input signal you are going to use for processing will decide this. The other factors that make an impact on the type of signal conditioning process are desired type of output, available power for isolation in the quality criteria of the signal.

Now let’s understand the basic PC BOARD functions such as accuracy, flexibility, and the isolation required by signal conditioning.

Accuracy:

Accuracy is the main thing to be noticed in the signal conditioning process. There is a broad variety of accuracy along with signal conditioning. There is a direct relation of accuracy between the conditioner and the accuracy of the other equipment. For example, the sensor that is used to provide the signal. An extremely accurate signal conditioner cannot perform well if the sensor is used in the process is not precise and working correctly. So, in a nutshell, you can say that to get the highly correct and efficient output, every degree of accuracy should be the same in the signal conditioner and other parts of the system. Otherwise, the device and cost would be wasted with a high level of precision.

Flexibility:

As clear from the name flexibility in the signal conditioner means processing with a number of signals. A wider range of signal types can be processed with the flexibility feature. It is often considered as an additional advantage. Many designers and manufacturers add this feature to the product just to increase its functionality and efficiency.

Because if the device is dealing with a wide range of signals, it is likely to be more precise and calibrated for sensors. The replacement and change of other important parts of the system can be done with the help of flexibility. This will not affect the other part of the system.

Isolation:

Isolation is used in the signal conditioning process at more than one point. As a clear from the name, this process isolates the components and encourages that there is no interconnection between electric and other parts of the devices. The isolation process is required because it will enhance the common quality of the system. Moreover, the signal that needs to be isolated would also be decided according to configuration.
Should you have any further questions regarding the Signal Conditioning Process, feel free to contact us at sales@pnconline.com

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PC BOARD Electronics Components Optimization

PC BOARD Electronics Components Optimization

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Can you imagine yourself all dressed up, but you have no place to go? Well, that’s awkward because we all need to do something but for a reason. And that reason should be enough strong that could stop us not to distracted by other various factors. The same happens to the engineer in the circuit board design. Sometimes, an engineer would do a mistake. What’s that mistake? He would probably be all dressed up, but he would not pay attention to the end goal. Instead, he would get distracted by other external factors and end up with nothing. And as a result, he would have a body of the circuit without a soul. That’s sounds bad right? So, what is that one thing that an engineer can apply to avoid this type of situation?

A clear answer, keep an eye on designing and optimizing. Before you launch your electronic component or product, you need to pay attention to the reasonable amount of material used in it.The fact that is overlooked in the virtual designing of the circuit board is that the product would have a physical structure also. The virtual designing process may include the components and design that are not beneficial or may not be available anymore. The database of virtual designing usually includes these components, and an engineer can get some hiccups in their assembly and prototyping process. And if these critical and useful components remain in the PCB design till the end of the designing then many severe problems can also occur.

For example, a delay in production can happen and the client may be unhappy. But the good news is, all these problems can be reduced if you take some steps and make some efforts to optimize your electric component section. But before we discuss the tips and tricks that need to be taken for better optimization of electronic components, one should understand how component procurement takes place.

Component selection and procurement:

You can get ease and freedom to work if the electronic components are placed on the circuit board correctly at a low frequency. The difficulty may arise when final design and heat dissipation occurs. Well, it is easy to deal with low frequency. But in the case of high frequency, the slightest mistake and wrong positioning of electric components that may be valid electrically would end in compromising the overall functionality of the circuit board. So, in a nutshell, it is being said that positioning any electric component in the circuit board is a crucial task to perform. In the case of high frequency, the requirement is also high for good positioning of the components. This will help in optimizing the signal path and improving the circuit operation.

The best placement for the circuit board can only be obtained by following the strict theoretical rules and some powerful software that helps designers in creating a sophisticated circuit. The length of the critical path should be reduced typically. If all the electric components are placed in the right arrangement, then the overall functionality of the circuit board can also be increased. And the physical size would be reduced accordingly.

Component selection is one of the most significant tasks that happen in circuit design and in the lifecycle of product development that may affect printed circuit board assembly. Then, the other tasks are performed to check if the components are integrated, and the device is performing the required functionality or not. Each component is available for a certain period and a graph is made for clear understanding. The product would be available in variation. A new production would be distributed modestly and then it would go to the peak once established and then decline because it is replaced with new technologies.

Following are the few terms that need to be taken care of while optimizing an electronic circuit. Some of them are related to the positioning of the components and some explain the optimization of the signal in any electronic circuit. An engineer should take care of every step so that the outcome of the circuit can work efficiently and effectively.

Placement of components for heat dissipation:

The positioning of components and optimization of a circuit board is not that easy task to do. It is always demanding and delicate to perform. The general recommendation is that the number of elements such as resistor, inductor, capacitor, indicator, and others should be connected with an extremely short track and device connected very close together. This is beneficial when the circuit is operating at a high frequency.

The rule is compulsory to follow for better functionality but sometimes, minimizing the length of the circuit may result in several thermal problems, and uneven accumulation of heat can happen, and some other unexplainable faults can also damage the entire functionality of the circuit board. So, to avoid these types of consequences, it is recommended to use the thermal ducts and go for the parallel positioning of the components.

With the advancement in technology, some techniques rapidly suggest an optimal positioning for components and then a uniform distribution so heat flow can be maintained. This ends up with the excellent thermal performance of the entire Printed Circuit Board circuit.

Placement of high-frequency components:

It is difficult to handle a system if it exceeds the frequency of 1 MHZ. The positioning of capacitive and inductive electrical and electronic components is critical to manage. The components may act differently even if they are arranged and electrically converted. So, the performance of the circuit board would be compromised. The motion of the capacitor and inductance of just a few centimeters can change the game by changing the functionality of the circuit. For example, you must have seen the transistors and receivers on the radio. HF amplifiers and other equipment that work in the high frequency.

Their frequency can be changed accordingly, and they will catch signals from the set frequency. The signal may be spread in the surrounding leaving the circuit in the order of MHz the positioning of the circuit board can be compromised (positively or negatively) with a small variation in the wiring connection. The resistors are difficult to manage and should be done in the most attentive environment.

Genetic algorithms:

As artificial intelligence is covering many other aspects of technology successfully, it had its impact on the world of electronics also. Some techniques help in the implementation of genetic algorithms so that the positioned components can be optimized, and thermal degree can be evaluated in the duration of the operation.

The convection can be cooled by airflow if the genetic algorithms are present on the surface of the board. The thermal model of the circuit acts in two dimensions. So, the optimization of the circuit and position of this differently acting thermal criteria is handled by the algorithm genetic. And this would result in the optimization of electronic components and positioning of components on the circuit board in a three-dimensional way.

All this would be done with the help of genetic algorithms. But arranging and finding the right arrangement is not a piece of cake. There are hundreds and thousands of arrangements that can take place in the circuit. For this purpose, the software has to manage the million permutations and combinations to find the right arrangement. Once the right arrangement is found, it is implemented for the efficient functionality of the circuit board.

Optimizing electrical components selection:

The impact of the component positioning on a circuit board is often undervalued. But the truth is your component choice can affect the assembly of the circuit board in a significant manner. The right choice for component packages can reduce pc board steps in the circuit board either through-hole or surface mount devices. However, some specific steps need to be followed for the overall functionality and optimization of the electric circuit board.

Determine the quantity available in the designing process:

Checking the quantity of the component is important because it helps in manufacturing delays of the circuit in searching for alternatives that perform equally well to the components from alternative markets.

Choose reputable suppliers for components:

Your product quality is depending on the components you are going to use in the circuit. So, selecting reputable suppliers and distributors is equally important to manufacturing. It should be mentioned in the manufacturing procedure which suppliers you are going to deal with for your product components.

Components should have comparable replacements:

Choosing components with replacement can help in minimizing a lot of tasks. Such as requirement gathering and redesigning and redefinition in case of components contingency. The need to update can also be managed.

Maintain access to the current component of the lifecycle:

Having a quick view of the current data rate is important. As the process proceeds further, you will need to check if the particular component is doing great or not. Similarly, this choice is important so you can check if you want to go with the particular component or you should select any other alternative.

Investigate the component:

This step is important to ensure the quality of your component.

Get your pcb fabrication and complete assembling done at PNC. Just contact us at sales@pnconline.com to get a customized quote.

What is the BGA of PCB Assembly

What is the BGA of PCB Assembly?

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What is BGA (ball grid array)?

Ball grid array (BGA) is used in integrated circuits for circuit mount packaging. Ball grid arrays are used when we need to mount the devices permanently such as mini processors. The connections are made on the bottom of the SMD ball grid arrays. A solder ball is present on every single pin. A uniform circuit for the grid is also made on the circuit for better connection. The size of this grid varies from 1.27mm to 1.0mm. Although there are hundreds and thousands of component connections present on each layer, the number of routable pins per layer is limited. The via and the routed connection should be applied to the inner pion of the layer as this technique is known as DogBone. There is another technique known as via in pad which is used when the circuit needs the pads in the solder masking and the pitch of the circuit is relatively small. Ball grid array is recommended because it provides more interconnection pins. The solder ball is also provided with every pin.

These pins can be put in flat, dual, and inline packages. The distribution of connection on the even and uniform circuit is compulsory. The bottom perimeter is also used sometimes but the whole button surface is more preferred. The process of the ball grid array is critical and needs to be done carefully while following the instructions. Soldering in a ball grid array is done in an automated process and needs complete control over the process. That’s the reason the ball grid array is not recommended for socket mounting.

The thing that needs to be noticed in the ball grid array is there is no direct lead that connects the ball grid with the circuit. Instead of leads, the ball grid uses solder balls to make a connection with the circuit and to pass the electric current. There is a physical connection made between the substrate and these balls during the smt assembly process. The physical structure is connected to the substrate by a wire which is responsible for the flow of the current. The conductive traces present in the trace are responsible for sending electric signals. This flow happens between the bonds and the substrate and the base of the balls.

There is a term known as ball grid re-balling. This technique allows the reusability of the component. That’s the reason it is most recommended. The scrapping rate is low in rebelling. This process is cost-effective and time-friendly because the ball grid package can be removed. This also saves the material of the entire process. In fact, the cost can be decreased in a high ratio if one selects to reuse on a ball grid array.

Why choose a ball grid array for PCB?

Ball grid arrays are used in printed circuit board packaging because of less density and low cost. Undersize chips are used for the interconnection of the circuit. On the other hand, there is another chip known as a conventional chip in contrast which uses the perimeter section for the interconnection. The printed circuit board has relatively high performance and more space for connection.

Moreover, the thermal resistance of the printed circuit board is low. It offers high performance at high speed. Printed circuit boards made from this technique are more reliable.

Types of ball grid array:

There are three types of ball grid arrays. These types are mentioned below:
• Ceramic ball grid array (CBGA)
• Plastic ball grid array (PBGA)
• Tape ball grid array (TBGA)
Each type is crucial in the processing and making connections and each part has its detriments. The selection of the right solder is important for better performance. That’s why relative types should be chosen for certain work.
Let’s understand the functionality of each type in detail.

Ceramic ball grid array (CBGA)
This ceramic package is used when the substrate used is of ceramic type. There are many further types of packages that come under the umbrella of ceramic grid arrays. For example, CCFA and LGA. The ceramic material is used when the temperature rate is high as the base material is ceramic. These types of chips are used in computer mini processors. Multiple layer packages are used in this type. The flip-chip method is preferred over the wire bond for the interconnection of the die. The reliability of the ceramic grid is increased by adding ninety percent lead with tin in ten percent quantity.

The difference in thermal coefficient of expansion in the substrate is also controlled by using this method. The packaging density and heat dissipation is high in this type. But the manufacturers have to compromise over the thermal compatibility as it is quite low for a printed circuit board. Moreover, the ceramic process makes the cost higher. So, this is not a cost-friendly type.

Plastic ball grid array (PBGA):
As clear from the name, the base material for the body package is plastic in this type of ball grid. It offers high density and solves the cost issues by combining the over-molded pas array carrier and glob to pad array carrier. Sixty-three percent of tin and thirty percent of eutectic tin is combined in the solder balls. The substrate is made in the sense that it can deal with at least 150 degrees Celsius of temperature.

The size of the normal package of the plastic grid is almost 17/17. 0.8mm to 1 mm is the ball pitch so the average range of the ball count would be from 206 to 976 balls. Plastic grid arrays are sensitive to humidity. But they perform better in the case of electricity. The thermal compatibility in plastic balls arrays is excellent which is a good choice for a printed circuit board.

Tape ball grid array (TBGA):
Tape ball grid array is used for a thinner base purpose. The electrical and thermal performance is optimal in the tape grid while the version of the ball grid is relatively thinner. The wire bond and flip-chip technology are used for facing up and facedown wire bonds respectively. This increases the dissipation of heat. The printed circuit boards are reliable, flexible, having more space and fine lines in this type of all grids. Tape ball grid arrays are also very sensitive to humidity. They are less dependent, and the overall cost of the connection is also low as compared to other types.

For having great manufacturing of printed circuit boards, the designer should have enough knowledge about ball grid arrays. Because the internal structure will depend on the design and correct use of the ball grid surface.

Benefits of Ball Grid Array:

Following are the core benefits of the Ball Grid Array:
• Ball grid arrays are a new technology used for interconnection in the circuit. This is done by using tiny spheres instead of conventional pins. So, this increases the benefits of the BGA in printed circuit boards.
• By ball grid array, the space of the printed circuit board can be managed properly. This package involves a smaller number of components and footprints. The space for the custom printed board can be increased and this will enhance the efficiency of the circuit board.
• The ball grid arrays improve the profitability of the circuit in the manufacturing process. These packages are kept on a large surface, so the soldering of the large area is easier.
• The manufacturing yield will enhance and then this will enhance the performance of the printed circuit board. The rework process is easy when the manufacturing is done in a large area.
• Ball grid arrays improve the thermal and electric conductance of the circuit. As the circuit is of small size so the heat can be dissipated easily. But the most heat can be transmitted on the board when the silicon wafer is present on the top surface. In other cases, the silicon wafer can be connected on the bottom side, then the other side of the silicon wafer will perform the role of best available space for heat dissipation.
• There is less damage in the circuit if the ball grid array is present because of the use of soldering balls.
• The soldering technician will be at ease when dealing with the ball grid array because it aligns itself on board along with stencils.
• The interconnection between the die and the pad is low and this improves the electrical conductance.
• The connection present on the bottom of the chips is shorter and assures the speed and performance of the circuit board.
• The pins used in the process are fragile and very thin in size. This increases the ratio of damage. And we already discussed that this damage is nearly impossible to overcome. But the ball grid array connection makes sure that the process is reliable and there is no chance of damage and break. As a result, the connection is more reliable.
• The overall cost of the connection will be reduced. All the benefits mentioned above will help in decreasing the cost of the process. The defect rate will also be reduced and the material and resources for the connection can be saved.

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