Introduction to the Basic Principles of Outer Layer Pattern Transfer in PCB Manufacturing (Part 2)
Today, we continue to introduce the basic principles of exposure and development in outer layer pattern transfer. 4.3 Exposure Definition: Using photosensitive materials, the designed circuit patterns are achieved through the processes of exposure/development/etching to obtain the desired copper circuit patterns. Reaction Principle: Exposed Area: The area of the film that is transparent under ultraviolet … Read more