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How To Choose High-Frequency PC Board Materials For Your RF Microwave Project?
The high-frequency PCB material is based on using a synthetic thermoplastic fluoropolymer which has an excellent dielectric property at different smaller microwave frequencies. For the design of PCB circuits with microwave frequencies, important characterizations that determine laminate circuit performance include dielectric constant (DK), dissipation factor (Df), thermal expansion coefficient (CTE), thermal dielectric constant coefficient (TCDk), and thermal conductivity. The most known high-frequency material for users of PCB laminates may be polytetrafluoroethylene (PTFE), a synthetic thermoplastic fluoropolymer with outstanding dielectric characteristics at microwave frequencies. PCB applications include RF antenna, WiFi (Carrier-Green and Licensed Access), IP infrastructure, power amplifiers, diplexers/multiplexers, testing, measurement, etc. It ...
What is a Keyboard PC Board?
Introduction As all other things are the same, a plate-assembled keyboard is more robust than a PCB assembled keyboard and has a stronger feeling. The overall quality of the keyboard and its case play, too, although it differs from a plate of aluminum or steel between the typing of a laminate sheet (PCB). (It's possible, but very rare, to have a plastic plate on a mechanical keyboard.) In contrast, the PCB-mounted keyboards usually have a bouncer key feel and a more flexible case and creakiness. It is safe to say that plate-mounted keys are generally more high-quality than PCB-mounted keyboards, although ...
SMT Assembly Conformal Coating
Definition Conformal coating is a thin layer of protected polymeric coating applied to printed circuit boards (PCBs) and electronic components. Its goal is to provide environmental and mechanical protection for the components and circuits, allowing them to last longer and be more reliable. It maintains long-term surface insulation resistance values by being electrically insulating, ensuring the assembly's operational integrity. It also prevents corrosion by acting as a barrier to airborne pollutants from the operational environment, like salt spray. Conformal coatings are often applied in the 25-250 micron range. Parylene films, on the other hand, are applied significantly thinner and can be fractions of ...
HOW DOES SMT ASSEMBLY WORK?
While modern designs for electronics get smaller, more designers depend on the technique of surface mounting. After the 80’s, this technique became famous and hasn't stopped being the dominant PCB assembly [1] technology for electronics production. Almost all of the devices in your pocket – either an iPhone xs max or a smartphone – has probably been produced using surface mount technology (SMT). Most of those components in your vehicle or Transportation today have probably been assembled using SMT. [caption id="attachment_621" align="alignleft" width="299"] [2] PCB assembly[/caption] What is Surface Mount Technology (SMT)? Assembling electronics with SMT involves assembling electrical parts using automated equipment that places components ...
ICT Testing VS Flying Probe Testing – PCB Assembly
[caption id="attachment_632" align="alignleft" width="300"] [1] PCB Assembly[/caption] Flying Probe testing and In-Circuit Testing (ICT) are excellent choices for testing the quality of circuit board construction. Both tests detect the expected problems before the circuit board gets into mass production and assemblage. Both tests are a fantastic way of assessing your end product. Testing of Circuit Boards: PCBs are getting progressively advanced to fulfill the technical requirements of our digital era. Automatized testing of a board before the mass manufacture permits you to find out faults before mass manufacturing. In-Circuit Testing (ICT) and Flying Probe Testing can assist you in finding out these fundamental ...