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:
Mar. 17, 1987
Filed:
May. 02, 1985
Shailendra Kumar, Upper Darby, PA (US);
Gerald Lorenz, Hatboro, PA (US);
Nellie L Cabato, Plymouth Meeting, PA (US);
Other;
Abstract
An electrical resistor of resistivity of less than about 600 ohms per square and with a temperature coefficient of resistance within the range of .+-.200 ppm/.degree.C. comprises an insulating substrate, electrically conductive terminations on a surface of the substrate, and a layer of resistor material on the surface of the substrate and in contact with the terminations. The resistor material comprises from about 25 to about 35% by weight glass and from about 50% to about 75% by weight conductive particles. Preferably the conductive particles consisting essential of tin oxide and at least about 0.2% by weight of ruthenium containing material, expressed as RuO.sub.2. The mass ratio of ruthenium containing material (as RuO.sub.2) to tin oxide is less than 7:93.