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. 05, 1999
Filed:
Nov. 13, 1995
Bruce L Prickett, Jr, Fremont, CA (US);
Ritu Shrivastava, Fremont, CA (US);
Alliance Semiconductor Corporation, San Jose, CA (US);
Abstract
A method of repairing over-erased flash EPROM cells (10) includes erasing the cells (12) and repairing the cells by a self-converging repair with a control gate bias (14), on a column by column basis. The self-converging repair includes grounding the sources (104) of the cells in a column, applying a pulsed bias voltage to the control gates of the cells (110), and a pulsed positive voltage to the drains of the cells (106). By varying the bias voltage at the control gate, the resulting threshold voltage of the cells after repair can be modulated to be greater than or less than an inherent steady state convergence value. Once one column of cells is repaired, the process is repeated on a subsequent column.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile