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. 27, 1984
Filed:
Dec. 01, 1982
Shoei Chemical Inc., Tokyo, JP;
Abstract
Resistor compositions are disclosed which comprise: (a) ruthenium oxide; (b) glass; (c) at least one metal oxide selected from the group consisting of lanthanum oxide, neodymium oxide, praseodymium oxide and samarium oxide; and (d) an organic vehicle. Resistors are produced using this composition by firing a resistor film comprising ruthenium oxide, glass and at least one metal oxide selected from the group consisting of lanthanum oxide, neodymium oxide, praseodymium oxide and samarium oxide onto an electrically insulating substrate. The use of the metal oxides in the resistor compositions surprisingly improve the TCR (temperature coefficient of resistance) particularly in high resistance ranges, and brings the TCR close to zero. In addition to the effect of improving the TCR, the metal oxides increase resistance and improve noise and VCR (voltage coefficient of resistance) properties.