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:
May. 10, 2005
Filed:
Oct. 24, 2002
Jun Ohtani, Hyogo, JP;
Jun Ohtani, Hyogo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
A potential of −3V is applied to a control gate electrode, a potential of 5V is applied to a pair of impurity regions and a potential of 3V is applied to a semiconductor substrate in a non-volatile semiconductor memory device. Accordingly, electrons existing on one impurity region side in a silicon nitride film move toward that impurity region, and electrons existing on the other impurity region side move toward that impurity region. Furthermore, electrons existing in that part (middle part) of the silicon nitride film which is positioned immediately above a region approximately at the middle point between one impurity region and the other impurity region move toward the semiconductor substrate. Therefore, MPE (Miss Placed Electron) is no longer caused in the non-volatile semiconductor memory device.