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:
Jun. 20, 2006
Filed:
Nov. 04, 2003
Dinesh A. Badami, Essex Junction, VT (US);
Tom C. Lee, Essex Junction, VT (US);
Baozhen LI, South Burlington, VT (US);
Gerald Matusiewicz, Poughkeepsie, NY (US);
William T. Motsiff, Essex Junction, VT (US);
Christopher D. Muzzy, Burlington, VT (US);
Kimball M. Watson, Essex Junction, VT (US);
Jean E. Wynne, Fair Haven, VT (US);
Dinesh A. Badami, Essex Junction, VT (US);
Tom C. Lee, Essex Junction, VT (US);
Baozhen Li, South Burlington, VT (US);
Gerald Matusiewicz, Poughkeepsie, NY (US);
William T. Motsiff, Essex Junction, VT (US);
Christopher D. Muzzy, Burlington, VT (US);
Kimball M. Watson, Essex Junction, VT (US);
Jean E. Wynne, Fair Haven, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and structure for fabricating a laser fuse and a method for programming the laser fuse. The laser fuse includes a first dielectric layer having two vias filled with a first self-passivated electrically conducting material. A fuse link is on top of the first dielectric layer. The fuse link electrically connects the two vias and includes a second material having a characteristic of changing its electrical resistance after being exposed to a laser beam. Two mesas are over the fuse link and directly over the two vias. The two mesas each include a third self-passivated electrically conducting material. The laser fuse is programmed by directing a laser beam to the fuse link. The laser beam is controlled such that, in response to the impact of the laser beam upon the fuse link, the electrical resistance of the fuse link changes but the fuse link is not blown off. Such electrical resistance change is sensed and converted to digital signal.