Patent ID: 8844338
Filing Date: 2014-09-30
Classification: G01N

Abstract:
1. A gas sensor element that detects concentration of a specific gas within a measured gas, the gas sensor element comprising: a wiring layer formed inside the gas sensor element; an insulating layer covering a front surface of the wiring layer; an electrode terminal provided on a main surface of the insulating layer on an opposite side of the insulating layer to the wiring layer, and electrically connected to the wiring layer; an intermediate layer interposed between the electrode terminal and the wiring layer, and electrically connecting the electrode terminal and the wiring layer; and a metal connecting member having electrical conductivity, wherein the insulating layer is provided with a through hole formed to pass through the insulating layer, the metal connecting member is disposed within the through hole, the through hole has a smaller outer diameter than that of the intermediate layer, and the metal connecting member electrically connects the intermediate layer and the electrode terminal, wherein the connecting member and the electrode terminal are composed of a first metal material, the wiring layer and the intermediate layer are composed of a second metal material, and the second metal material is lower in melting point than the first metal material.