Patent ID: 8042263

Claim:
A process for manufacturing a circuit board wherein a first substrate having a conductor post and a second substrate having a conductor pad for receiving said conductor post are laminated through an interlayer adhesive, and said conductor post and said conductor pad are electrically connected, comprising, as a first step, bonding said conductor pad with said conductor post by thermocompression under predetermined first conditions while said first and said second substrates are arranged such that said conductor pad faces said conductor post through said interlayer adhesive, wherein said first conditions are a temperature of 210° C. or higher and 220° C. or lower and a pressure of 1 MPa or more and 4 MPa or less; thermocompressing said first substrate and said second substrate under predetermined second conditions while said conductor pad is bonded with said conductor post, wherein said second conditions are a temperature of 215° C. or higher and 225° C. or lower and a pressure of 0.3 MPa or more and 2 MPa or less; and thermocompressing said first substrate and said second substrate under predetermined third conditions while said conductor pad is bonded with said conductor post, wherein said third conditions are a temperature of 240° C. or higher and 280° C. or lower and a pressure of 0.3 MPa or more and 2 MPa or less.