Patent ID: 7838994
Filing Date: 2010-11-23
Classification: G01T,H01L,H05K,Y02P

Abstract:
1. A semiconductor device comprising: a semiconductor element, outputting an electrical signal; and a wiring substrate, provided with conduction paths, guiding the electrical signal between a signal input surface and a signal output surface, and connected to the semiconductor element at the signal input surface; the wiring substrate comprising: a glass substrate, provided with through holes, and conductive members, disposed in the through holes and functioning as the conduction paths by providing electrical continuity between the signal input surface and the signal output surface; the semiconductor element and the conductive members of the wiring substrate being electrically connected via bump electrodes formed on a surface of the semiconductor element connected to the wiring substrate and in correspondence with the conductive members; and wherein each of the bump electrodes is connected to the corresponding conductive member in a manner such that a portion of the bump electrode enters into the interior of the through hole in which the conductive member is disposed; each of the through holes in the glass substrate has a first tapered part at the signal input surface side formed to a tapered shape, with which the opening area decreases gradually from the signal input surface towards the interior of the glass substrate so that the opening area at the signal input surface is larger than the opening area at a predetermined position in the interior of the glass substrate; and a second tapered part at the signal output surface side formed to a tapered shape, with which the opening area decreases gradually from the signal output surface towards the interior of the glass substrate so that the opening area at the signal output surface is larger than the opening area at a predetermined position in the interior of the glass substrate; each of the conductive members includes a conducting portion, which is formed on the inner wall of the interior of the through hole that includes the first tapered part and the second tapered part; an input portion, which is continuous with the conducting portion, formed on the signal input surface at an outer peripheral portion of the first tapered part, and arranged as an electrode pad to which the bump electrode is connected; and an output portion, which is continuous with the conducting portion and formed on the signal output surface at an outer peripheral portion of the second tapered part; and electrode pads, which are respectively electrically connected via wirings to the output portions of the corresponding conductive members, are further formed on the signal output surface, and the electrode pads are formed at a pitch which is smaller than a pitch of the through holes in the glass substrate.