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. 09, 2003
Filed:
Dec. 22, 2000
Katsumi Nishikawa, Tokyo, JP;
Kazuo Shibata, Tokyo, JP;
Other;
Abstract
A method and apparatus for generating a test pattern enabling the detection of malfunctions produced when a semiconductor device is loaded on actual equipment prior to marketing. Using a logical analyzer, signal waveform data collected during the period of signal malfunction is acquired. This signal waveform data is converted by a test pattern generating device into a test pattern for automatic testing equipment. This test pattern is used to change data at the time of malfunction into normal data to generate a pattern of expected values for an output signal of the semiconductor device. Then, it is determined whether the input signal setting required for an output signal of the semiconductor device is present in the signal waveform data. If not, a test pattern for setting the input signal is generated. If the malfunction is reproduced in the testing equipment, the test pattern is used as a mass production test.