Patent ID: 7221049
Filing Date: 2007-05-22
Classification: H01L,H05K

Abstract:
1. A circuit device comprising: a circuit substrate; a first insulating layer formed on a surface of the circuit substrate; a first conductive pattern formed on a surface of the first insulating layer; a second insulating layer covering the first conductive pattern; a second conductive pattern laminated above the first conductive pattern in a manner that the first and second conductive patterns are connected through the second insulating layer; and a connecting portion configured to penetrate a desired position of the second insulating layer and connect the first conductive pattern to the second conductive pattern, wherein each of the insulating layers includes filler, a larger amount of the filler is included in the first insulating layer than in the second insulating layer, and a grain size distribution of the filler included in the first insulating layer is wider than a grain size distribution of the filler included in the second insulating layer.