I believe that many people are familiar with PCB circuit boards, which may be heard frequently in daily life, but may not be familiar with PCBA, and may even be confused with PCB. So what is a PCB? How did PCBA evolve? and what is the difference between PCB and PCBA? Let’s take a closer look below. About PCB PCB is the short name of Printed Circuit Board. Because it is made by electronic printing, it is called “printing” circuit board. [...]
Today, as the electronics industry is growing, with the trend of light, thin, and short electronic products, the development of high performance and multi-function, and the improvement of electronic device soldering technology, flexible circuit boards (FPC) are also used for electronic mutual The connected circuit boards have been rapidly developed in the Chinese printed board industry in the past two years. Due to the demand for light, thin and short electronic products, the application range of flexible PCBs is [...]
First, the reason for PCB copper plating: 1.EMC, for a large area of ground or power copper, will play a shielding role, some special, such as PGND to protect. 2.pcb process requirements, generally in order to ensure the plating effect, or the laminate is not deformed, copper plating for the PCB layer with less wiring. 3. Signal integrity requirements, giving the high frequency digital signal a complete return path and reducing the wiring of the DC network. Of course, there are heat [...]
First, the reasons for the deformation of the film and its solution: the reason: (1) Temperature and humidity control failure (2) The exposure machine temperature rises too high Solution: (1) Normally, the temperature is controlled at 22 ± 2 ° C and the humidity is at 55% ± 5% RH. (2) Use a cold light source or an aerator with a cooling device and continuously replace the backup film. Second, the process of film deformation correction: 1. Under the condition of mastering the operation technology of the [...]
