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:
Oct. 26, 2004
Filed:
May. 21, 2002
Lin-Kai Bu, Tainan, TW;
Kun-Cheng Hung, Hsinchu, TW;
Himax Technologies, Inc., Tainan, TW;
Abstract
A testing method and a testing a voltages apparatus embedded in the scribe line on a wafer are disclosed, for testing the to be measured from a die on a wafer. The testing apparatus includes a multiplexer and a comparator. The multiplexer receives the voltages to be measured and outputs a multiplexing or selected voltage according to a selection signal. The comparator receives a reference voltage and the multiplexing voltage and then outputs a digital result by comparing the reference voltage, and the multiplexing voltage. The digital result can be applied to a digital testing machine, such that testing speed is increased and testing cost is decreased. Moreover, the testing apparatus embedded in the scribe lines has the capability to compensate for the comparator's offset, and accordingly, the testing reliability is also improved.