Electronic products should use PCB. PCB (printed circuit board) is used in almost all electronic products and is considered as the "mother of electronic system products".
There are three methods of resist coating: liquid resist coating method and FPC resist coating method for circuit board
At present, most of the holes drilled in the double-sided flexible printed board are still drilled by the NC drilling machine. The NC drilling machine is basically the same as that used in the rigid printed board, but the drilling conditions are different. Because the flexible printed board is very thin, multiple pieces can be overlapped for drilling. If the drilling conditions are good, 10 ~ 15 pieces can be overlapped for drilling.
PCB manufacturers show you the evolution of PCB production process. In the 1950s and early 1960s, laminates mixed with different types of resins and various materials were introduced, but PCB is still single-sided. The circuit is on one side of the circuit board and the component is on the other side. Compared with the huge wiring and cable,
Flow chart of single-sided FPC circuit board: engineering documents - copper foil - Pretreatment - press dry film - exposure - Development - etching - film stripping - AOI - Pretreatment - coating film (or ink printing) - pretreatment before electroplating - electroplating - post electroplating - reinforcement - appearance punching - electrical measurement - appearance inspection - shipment;
PCB proofing, as a component of high-precision electronic products, has been a very common existence in life. However, we all know that domestic professional PCB proofing design needs different point settings in different stages, and large grid points will be used for device layout in the layout stage. Let's take a look at the detailed PCB proofing layout setting skills.
