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. 12, 1995
Filed:
Sep. 22, 1994
William Borland, Kanagawa, JP;
Keiichiro Hayakawa, Kanagawa, JP;
Takeshi Sato, Tokyo, JP;
Jerome D Smith, Kanagawa, JP;
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
To provide a thick film resistor involving small variations in resistance and TCR during the firing step and a low thermal coefficient of expansion. A thick film resistor composition containing 5-30 wt. % of a ruthenium pyrochlore oxide and 10-90 wt. % of a glass binder, wherein (1) the ruthenium pyrochlore oxide is PbRuO.sub.3, (2) the glass binder is a glass which contains a first glass containing 61-85 wt. % of PbO, 10-36% of SiO.sub.2 and 0-2 wt. % of B.sub.2 O.sub.3, the total content of the PbO, SiO.sub.2 and B.sub.2 O.sub.3 accounting for 95 wt. % or more of the first glass, and in which 2-20 wt. % of B.sub.2 O.sub.3 is contained in the entire glass binder, and (3) the first glass accounts for 5-30 wt. % of the thick film resistor composition, and the weight ratio of the ruthenium pyrochlore oxide to the first glass is 5:30-60:40.
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