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:
Oct. 31, 1995
Filed:
Oct. 14, 1993
Marion E Ellis, Kokomo, IN (US);
Delco Electronics Corp., Kokomo, IN (US);
Abstract
Thick film resistor ink compositions and a method for formulating and processing such inks are provided for producing thick film resistors having highly repeatable and stable resistance characteristics. The inks are specifically formulated to produce resistors whose resistivities are determined in part by the sintering temperature employed in the processing of the resistors. The processing of the inks involves using infrared radiation techniques to rapidly sinter the inks at highly controllable temperatures, so as to enable the resistance of a resistor to be predictably altered by the sintering operation, such that in-process adjustments can be made to the processing method. Thick film resistors produced in accordance with this invention are characterized by high stability to environmental influences and low TCR values on the order of about .+-.50 ppm/.degree.C.