Patent ID: 8501101
Filing Date: 2013-08-06
Classification: G01N

Abstract:
1. A gas sensor, comprising: a substrate, provided with a first surface, a second surface opposite to the first surface, and a cavity, wherein the cavity is provided with an opening at the first surface; an insulating film, disposed on the first surface and covering the opening; a heating unit, located above the opening; an electrode pair, disposed on the insulating film and electrically separated from the heating unit; a buffer layer, disposed on the insulating film and located above the heating unit, wherein the buffer layer is electrically connected to the electrode pair, the buffer layer is a sintered mixture of nanoparticles, micronparticles, and doped particles, and at least part of an orthogonal projection of the buffer layer on the first surface is located on the substrate next to the opening; and a gas sensing layer, disposed on the buffer layer and provided with a nano-catalyst therein.