Denso Corporation

The University of Tokyo

Kyushu University

Eiji Higurashi

Toshihiro Miyake

Tadatomo Suga

Renshi Sawada

A joint structure includes a first member, a second member and a metal joint layer. The first member has including a first surface and is made of material having one of copper, copper alloy, aluminum, or aluminum alloy. The second member includes a second surface that faces the first surface of the first material. The metal joint layer includes a gold joint layer made of material having gold or gold alloy and is disposed between the first surface of the first material and the second surface of the second material. A thickness of the metal joint layer is smaller than flatness of the first surface of the first material and flatness of the second surface of the second material. Fluorine is dispersed inside at least the gold joint layer included in the metal joint layer.

Joint structure, electronic device and method for manufacturing the joint structure

A highly miniaturized biosensor and a sensor unit, which can meet a demand for further miniaturization. With this invention, miniaturization is possible, and the number of production steps including those for assembling individual parts can be reduced. Accordingly, mass production will be possible, and cost reduction and high reliability will be achieved. A light emitting unit () and a light receiving unit () are disposed in a same recess () formed on a surface of a semiconductor substrate (), and a light shielding cover substrate () having a first light guide section () and a second light guide section () is disposed on an upper side of the semiconductor substrate (). Since the light receiving unit () is formed with arrayed light receiving elements (), the same number of the second light guide sections () as the light receiving elements () are provided on the light shielding cover substrate (), and the light receiving surfaces of the light receiving elements () are connected to one end of each of the second light guiding sections () so as to conform to each other without any gap.

Growing community of inventors

Tokyo, Japan

Eiji Higurashi