The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 27, 2019
Filed:
Jan. 24, 2017
Dongbu Hitek Co., Ltd., Seoul, KR;
Joo Hyeon Lee, Gyeonggi-do, KR;
Han Choon Lee, Seoul, KR;
DB HITEK CO., LTD., Seoul, KR;
Abstract
In embodiments, a semiconductor gas sensor includes a substrate having a cavity, a first insulation layer formed on the substrate, including an exposure hole formed at a position corresponding to the cavity and a peripheral portion of the cavity, a second insulation layer formed on the first insulation layer, covering the exposure hole, a heating electrode formed on the second insulation layer, being formed at a position corresponding to the cavity, a sensing electrode formed over the heating electrode, being electrically insulated from the heating electrode and a detection layer covering the sensing electrode, being capable of having a variable resistance when acting with a predetermined kind of gas.