Patent ID: 7854062
Filing Date: 2010-12-21
Classification: H01L,H05K,Y10T

Abstract:
1. A method for manufacturing a circuit device, comprising: forming a first conductive film on a surface of a circuit board; forming a first wiring layer and a first connection part by etching the first conductive film, wherein the first connection part protrudes in a thickness direction, and the first connection part and the first wiring layer are integrally formed and made of the same material, wherein a thickness of the first conductive film is greater than a sum of a thickness of the first wiring layer and a thickness of the first connection part; laminating a second conductive film on the first wiring layer with an insulating layer containing fillers interposed therebetween; partially removing the second conductive film corresponding to a region where the first connection part is formed; forming a through-hole by removing the insulating layer in a region thinly formed by burying the first connection part, and exposing an upper surface of the first connection part to a lower side of the through-hole; connecting the second conductive film and the first wiring layer by forming a second connection part in the through-hole; and forming a second wiring layer by patterning the second conductive film.