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:
Nov. 16, 1993
Filed:
Nov. 05, 1991
Peter G Hancock, Plano, TX (US);
Honeywell Inc., Minneapolis, MN (US);
Abstract
A trimmable resistor is provided which can be trimmed with a single movement of a laser beam without requiring intermitted deenergizations of the beam accompanied by measurements of the resistance to determine additional material removal steps. The procedure of the present invention begins the material removal at a location within the body of the resistor and displaced from all edges of the resistor body by a predetermined amount. The energization of the laser immediately begins to remove material at its initial location and, as the laser is moved to a second location, a single cut is made to calibrate the resistor wherein the entire cut is located within the body of the resistor and no part of the cut intersects any edge of the resistor body. The length of the cut is calculated prior to initiation of the trimming procedure and the technique of the present invention permits the movement of the laser beam to be precisely made without positioning error being induced by the normal initiation point which is located outside of the body of the resistor in trimming techniques known to those skilled in the art.