Development of low cost FPCs(No.1)

Abstract

In term of fabricating FPCs in the low cost, Direct Metallization, which method to form a copper layer on a polymide film directly is promising method. The key technology to realizing that is how to change a amic acid layer into a polymide layer on the polymide film again. In this research, it was revealed that the reason was due to the existence of Cu ions in the amic acid layer.