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PCB design technology
The key to PCB EMC design is to minimize the reflow area and let the reflow path flow in the direction of the design. The most common return current problems come from cracks in the reference plane, changing the reference plane layer, and the signal flowing through the connector. Jumper capacitors or decoupling capacitors may solve some problems, but the overall impedance of capacitors, vias, pads...
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Manufacturing Process of Heavy Copper Multilayer Board
With the rapid development of automotive electronics and power communication modules, ultra-thick copper foil circuit boards of 12oz and above have gradually become a kind of special PCB boards with broad market prospects, which have attracted more and more manufacturers’ attention and attention; With the wide application of printed circuit boards in the electronic field, the functional requiremen...
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Learn About Different Types of PCBs and Their Advantages
A printed circuit board (PCB) is a thin board made from fiberglass, composite epoxy, or other laminate materials. PCBs are found in various electrical and electronic components such as beepers, radios, radars, computer systems, etc. Different types of PCBs are used based on the applications. What are the various types of PCBs? Read on to know. What are the Different Types of PCBs? PCB’s are often ...
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Comparative tracking index of PCB
The tracking resistance of the copper clad laminate is usually expressed by the comparative tracking index (CTI). Among the many properties of copper clad laminates (copper clad laminates for short), tracking resistance, as an important safety and reliability index, has been increasingly valued by PCB circuit board designers and circuit board manufacturers. The CTI value is tested in accordance wi...
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PCB Pad size
When designing PCB pads in PCB board design, it is necessary to design strictly in accordance with relevant requirements and standards. Because in the SMT patch processing, the design of the PCB pad is very important. The design of the pad will directly affect the solderability, stability and heat transfer of the components. It is related to the quality of the patch processing. Then what is the PC...
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Grid copper, solid copper. Which one?
What is copper coating? The so-called copper pour is to use the unused space on the PCB as a reference surface and then fill it with solid copper. These copper areas are also called copper filling. The significance of copper coating is to reduce the impedance of the ground wire and improve the anti-interference ability; reduce the voltage drop and improve the efficiency of the power supply; if it ...
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How to control circuit board warpage&twist
Warping of the battery circuit board will cause inaccurate positioning of the components; when the board is bent in SMT, THT, the component pins will be irregular, which will bring a lot of difficulties to the assembly and installation work. IPC-6012, SMB-SMT Printed circuit boards have a maximum warpage or twist of 0.75%, and other boards generally do not exceed 1.5%; the allowable warpage (doubl...
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Why printed circuit board need impedance control?
Why printed circuit board need impedance control? In the transmission signal line of an electronic device, the resistance encountered when the high-frequency signal or electromagnetic wave propagates is called impedance. Why do PCB boards have to be impedance during the manufacturing process of the circuit board factory? Let us analyze from the following 4 reasons: 1. The PCB circuit board of the ...
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Why most multi-layer circuit boards are even-numbered layers?
There are single-sided, double-sided and multi-layer circuit boards. The number of multi-layer boards is not limited. There are currently more than 100-layer PCBs. The common multi-layer PCBs are four layer and six layer boards. Then why do people have the question "Why are PCB multilayer boards all even-numbered layers? Relatively speaking, even-numbered PCBs do have more than odd-numbered PCBs, ...
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