Patent ID: 7019404
Filing Date: 2006-03-28
Classification: H01L,H05K,Y10T

Abstract:
1. A multi-layered circuit substrate for a semiconductor device, comprising: a multi-layered circuit substrate body having first and second surfaces and comprising a plurality of conductive pattern layers integrally laminated, one on another, from said first surface to said second surface, so that a plurality of semiconductor device elements can be arranged on said first surface of the substrate body; each of the conductive pattern layers comprising a resin layer and a conductive pattern and having a first side toward the element mounting, first surface of the substrate body and an opposite, second side toward the second surface of the substrate body; the conductive patterns of the plurality of conductive pattern layers being electrically interconnected through vias, each via having a closed bottom at the first surface side and an open top at the second surface side; and a plate member, a rigidity thereof being higher than that of said substrate body, attached to said second surface of the substrate body.