Patent ID: 7163841
Filing Date: 2007-01-16
Classification: H01L,H05K

Abstract:
1. A method of manufacturing a circuit device, comprising: forming a first wiring layer on a top surface of a supporting substrate, having a salient protruding in the thickness-wise direction thereof; depositing a conductive film on the first wiring layer with an insulation layer interposed there-between; forming a contact part which provides electrical continuity between the salient and the conductive film; forming a second wiring layer by patterning the conductive film; connecting the second wiring layer and a circuit element electrically; sealing the top surface of the supporting substrate with a sealing resin in order that the circuit element is coated; and separating a back surface of the first wiring layer, and the insulation film from the supporting substrate, wherein the contact part is formed by: partly removing the conductive film to expose the insulation layer; forming a through hole by removing the exposed insulation layer; and forming a plated film on the through hole.