Patent ID: 8323878
Filing Date: 2012-12-04
Classification: G02B,H01L,H05K

Abstract:
1. A method of manufacturing an optical waveguide laminated wiring board, the method comprising: preparing a wiring board including a pad for connection; forming a first cladding layer on a surface of the wiring board on a side where the pad is formed, and then forming a first via hole in the first cladding layer, the first via hole reaching the pad; filling conductive material in the first via hole so as to form a first conductor portion having a top portion projecting from a surface of the first cladding layer and spreading semispherically thereon; forming a core layer on the first cladding layer in a region neighboring a portion where the first conductor portion is formed on the first cladding layer; forming a second cladding layer on the first cladding layer and the core layer so as to cover the first conductor portion with the second cladding layer, and then forming a second via hole in the second cladding layer, the second via hole reaching the first conductor portion; and filling conductive material in the second via hole so as to form a second conductor portion electrically connected to the first conductor portion.