Patent ID: 9655236
Date: 2017-05-16
CPC Classifications: H05K,Y10T

Claim:
1. A multilayer circuit board comprising: a plurality of circuit board layers, each comprising a dielectric layer and conductive traces thereon comprising a first metal; a first circuit board layer of said plurality thereof having a through-via therein; a plating in said through-via comprising the first metal; said first circuit board layer and a second circuit board layer of said plurality thereof being relatively aligned so that said through-via of said first circuit board layer is adjacent a feature on said second circuit board layer, and said first and second circuit board layers being directly laminated together without an adhesive material; and adjacent portions of said conductive traces being joined together by an intermetallic compound formed between the first metal and a second metal, the intermetallic compound having a melting temperature above a lamination temperature of the dielectric layers and comprising Cu