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:
Jul. 02, 2002
Filed:
Dec. 16, 1998
Osamu Kitade, Hyogo, JP;
Tetsushi Hoshita, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A semiconductor storage device having a line-to-line burn-in function of main word lines, applying a stress voltage between the main word lines in a wafer burn-in state. In a wafer burn-in state, by a control circuit means, main word lines are divided to odd-numbered lines and even-numbered lines to be connected to an odd-numbered pad and an even-numbered pad respectively, and a stress voltage is applied directly between the odd-numbered pad and the even-numbered pad. By a row decoder being capable of control in both of an ordinary operation mode and a wafer burn-in operation mode, in a wafer burn-in state, main word lines are divided to odd-numbered lines and even-numbered lines to become selective state, and a stress voltage is applied between main word lines.