Patent ID: 7605463
Filing Date: 2009-10-20
Classification: H01L,H05K

Abstract:
1. An interposer interposed between a wiring board and an electronic element mounted on the wiring board and used to form an electronic device, the interposer comprising: a flat plate shaped substrate made of an inorganic material; a through wiring including conductors embedded in one or more through holes passing through the substrate; and an upper wiring and/or a lower wiring that are respectively formed in predetermined patterns on the surfaces of the substrate and electrically conducted through the through wiring, wherein the through wiring, the upper wiring and the lower wiring are wherein the insulating material layer is provided on an upper surface of the substrate, a bottom surface of the substrate, and on inner parts at an inside portion of a through hole, and the preliminary wiring patterns are formed on inner parts of an insulating layer on inner parts of the through hole, and wherein the preliminary wiring pattern is an indented structure pattern corresponding to a wiring pattern formed on the insulating material.