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. 24, 2016
Filed:
Mar. 06, 2014
SK Hynix Inc., Gyeonggi-do, KR;
Seiichi Aritome, Gyeonggi-do, KR;
Soo Jin Wi, Gyeonggi-do, KR;
Angelo Visconti, Appiano Gentile, IT;
Mattia Robustelli, Milan, IT;
SK Hynix Inc., Gyeonggi-do, KR;
Abstract
A method of operating a semiconductor memory device includes performing a first program operation in order to raise threshold voltages of memory cells, performing a program verification operation for detecting fast program memory cells, each having a threshold voltage risen higher than a first sub-verification voltage from a second sub-verification voltage or lower, by using a target verification voltage and the first sub-verification voltage and the second sub-verification voltage which are sequentially lower than the target verification voltage, and performing a second program operation under a condition that an increment of each of threshold voltages of memory cells, which is lower than the target verification voltage, is greater than an increment of the threshold voltage of each of the fast program memory cells.