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:
Feb. 19, 2008
Filed:
Dec. 14, 2006
Richard W. Foote, Kennedale, TX (US);
Richard W. Foote, Kennedale, TX (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A system and method is disclosed for providing a self heating adjustable titanium disilicon (TiSi) resistor. A triangularly shaped layer of polysilicon is placed a layer of insulation material. A layer of titanium is applied over the polysilicon and heated to form a layer of C49 type of TiSi. A current is then applied to the small end of the triangularly shaped layer of C49 TiSi. The current generates heat in a high resistance portion of the triangularly shaped layer of C49 TiSiand converts a portion of the C49 TiSito C54 TiSi. The lower resistance of the C54 TiSidecreases the effective resistance of the resistor. A desired value of resistance may be selected by adjusting the magnitude of the applied current.