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:
Jan. 13, 2009
Filed:
Jun. 14, 2005
Bor-doou Rong, Chupei, TW;
Shi-huei Liu, Jhubei, TW;
Bor-Doou Rong, Chupei, TW;
Shi-Huei Liu, Jhubei, TW;
Etron Technology, Inc., Hsin-Chu, TW;
Abstract
A test method is described in which a signal from a tester enters a memory chip or memory module into a special test mode. The special test mode allows leakage defects connected to bit lines to be detected using bit line sense amplifiers. A first test command is issued by a tester, after which a word line is activated. The tester issues a second test command, delayed from the first test command, during the special test mode to turn-on the memory bit line sense amplifiers. The delayed second test command allows sufficient time for the leakage from defects at the crossing of the bit lines and the word line to charge capacitance of the bit lines and allow detection by the sense amplifiers.