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. 17, 1997
Filed:
Jul. 28, 1995
Masaru Sanada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A short circuit point is detected between wiring patterns on an integrated circuit which includes functional circuits and wiring patterns. For this purpose, an apparatus includes a power supply unit for applying a predetermined voltage between power supply wiring patterns of the integrated circuit such that the functional circuits are in a non-operating state. A current consumed between the power supply wiring patterns is continuously monitored. In this state, a laser beam is irradiated to a predetermined point on the integrated circuit and a current change amount is detected in response to the irradiation of the laser beam. The detection operation is performed for all the predetermined points. A short circuit point is determined between the wiring patterns from data indicating the current change amounts at the predetermined points.