Patent ID: 6700071
Filing Date: 2004-03-02
Classification: H05K,Y10T

Abstract:
A multi-layer circuit board, comprising:(a) a double-side circuit board including a first substrate, a plurality of first through conductors disposed in said first substrate, bonding layers disposed on either side of said first substrate, and a first circuit pattern and a second circuit pattern disposed on the surface of said bonding layer, said first circuit pattern and said second circuit pattern being electrically connected to each other by said first through conductors; (b) an intermediate substrate including a second substrate, a plurality of second through conductors disposed in said second substrate, and a first bonding layer and a second bonding layer disposed on either side of said second substrate, said first bonding layer and said second bonding layer being disposed on either side of said substrate except said second through conductors, and said intermediate substrate being disposed on the surface of at least one of said first circuit pattern and said second circuit pattern.