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:
Sep. 15, 2009
Filed:
Jun. 04, 2007
Naomi Miyake, Osaka, JP;
Yoshiro Nakata, Kyoto, JP;
Naomi Miyake, Osaka, JP;
Yoshiro Nakata, Kyoto, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The connection between a PTC elementcorresponding to each semiconductor ICand a power-supply lineis performed via a relay, a high voltage is supplied to the power-supply lineby sequentially turning on the relays, and a high voltage is supplied to each PTC elementin order, whereby it is possible to trip beforehand a PTC elementconnected to a DC-defective semiconductor IC. In this state, wafer level burn-in is performed together, which enables the PTC elementto be positively tripped during the burn-in for the DC defect of the semiconductor IC, with the result that it is possible to increase the reliability of the burn-in.