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:
Nov. 19, 2019
Filed:
Apr. 08, 2016
Applicant:
Ngk Spark Plug Co., Ltd., Nagoya-shi, Aichi, JP;
Inventors:
Assignee:
NGK SPARK PLUG CO., LTD., Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 21/683 (2006.01); H01L 21/67 (2006.01); H05B 3/28 (2006.01);
U.S. Cl.
CPC ...
H01L 21/67103 (2013.01); H01L 21/6831 (2013.01); H05B 3/283 (2013.01);
Abstract
As viewed in plane, a ceramic heater includes zone heat-generating elements disposed in respective heating zones so as to heat a ceramic substrate independently. In the heating zone having a hole region, the zone heat-generating element is formed of a linear heat-generating conductor which has parallel segments disposed in parallel, and a turning-back segment which connects, while turning back, the parallel segment of the heat-generating conductor extending toward the hole region to the adjacent parallel segment of the heat-generating conductor so as to prevent the parallel segment extending toward the hole region from overlying the hole region.