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:
Aug. 18, 1981
Filed:
Aug. 09, 1979
Lloyd Berrin, Allentown, PA (US);
Howard M Cohen, Allentown, PA (US);
William B Grupen, Emmaus, PA (US);
James D McElroy, Allentown, PA (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A method of fabricating thin and thick film resistors which results in stable resistance characteristics, ability to withstand high current or voltage and a precise method of trimming small resistors. After the resistor film (20) and contacts (22 and 23) thereto are formed, the resistors are trimmed by a cut (24) along the length dimension so that the width of the current path is reduced uniformly. The waste portion of the resistor is then separated from the circuit by a cut (27) along its width. Current crowding in the vicinity of the cut is therefore essentially eliminated.