Negative film board: Generally speaking, we are using the tenting process. The liquid used is acid etching negative film. Because the film or copper surface is transparent after the film is made, the unnecessary part is black. After the line process exposure, the transparent part is chemically harde

The positive film of the circuit board: generally the pattern process we are talking about, the liquid used is an alkaline etching positive film. If the negative film is used, the desired line or copper surface is black, and the part is transparent, and the same is true. After exposure by the line p

A circuit board generally refers to a circuit board. The names of the circuit boards are: circuit boards, PCB boards, aluminum substrates, high frequency boards, thick copper boards, impedance boards, PCBs, ultra-thin circuit boards, ultra-thin circuit boards, and printed (copper etching) circuit

At present, flexible circuits mainly include four types of single-sided, double-sided, multi-layer and rigid flexible circuit boards.1 Single-sided flexible board is the lowest cost, when the board is not required for electrical performance. For single-sided wiring, a single-sided flexible board sho