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:
Dec. 07, 1999
Filed:
Mar. 15, 1999
Kentaro Sawamura, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Concerning a resistance element comprising a laminated and sintered article of an insulating material substrate layer and a conductor layer formed on or embedded in the insulating material substrate layer, a material which is constituted of tungsten and carbon and has an atomic ratio of tungsten to carbon equal to 1:0.4 to 1:0.98 is used as said conductor layer. Such resistance element can be used at a temperature of 1400.degree. C. or more and even further at a temperature of 1500.degree. C. or more. The resistance element can increase its temperature rapidly to 1100.degree. C. or more within about 3 seconds without any control circuit. The resistance element is a rapid temperature-rise resistance element with a high ignition performance constituted of ceramics with superior durability including resistance to repetitions of temperature increase and decrease, and resistance to oxidation at a high temperature.