Patent ID: 6523258
Filing Date: 2003-02-25
Classification: H05K,Y10T

Abstract:
A method of manufacturing a printed circuit board, comprising the steps of:(a) disposing a first release film on a surface of a substrate, and disposing a second release film on a back surface of said substrate; (b) forming a through-hole through said first release film, said second release film and said substrate; (c) filling conductive paste into said through-hole; (d) peeling said first release film and said second release film from said substrate with said through-hole filled with said conductive paste; (e) placing a first metallic member on the surface of said substrate with said release films removed, and placing a second metallic member on the back surface of said substrate; (f) compressing under heat said substrate with said first metallic member and said second metallic member disposed thereon; and (g) forming a first circuit pattern on said first metallic member, and forming a second circuit pattern on said second metallic member, wherein a thickness of said first release film is greater than a thickness of said second release film; when said first release film is peeled, a first projected paste portion is formed, said first projected paste portion being projected from the surface of said substrate having said through-hole, and a second projected paste portion is formed, said second projected paste portion being projected from the back of said substrate having said through-hole; and said first metallic member is electrically connected to said first projected paste portion, and said second metallic member is electrically connected to said second projected paste portion.