Discuss about the line production process of thick copper

In thick Copper PCB production,the etching has been a difficulty.To achieve the purpose of etching,producing generally choose multiple rapid etching or etching off slow.This paper compares different thickness of the plate surface of copper etching,analyzes and compares the difference of etching on the etching factor,line width,line shape,and analyzes the reason of their differences.It is a valuable reference for the production and design of PCB.