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:
Sep. 09, 2014
Filed:
Aug. 31, 2012
Shin Won Seo, Incheon, KR;
Shin Won Seo, Incheon, KR;
SK Hynix Inc., Gyeonggi-do, KR;
Abstract
A semiconductor device and an operating method thereof comprise peripheral circuits configured to apply an erase voltage to memory cells when performing an erase operation, and sense a voltage change of bit lines by an erase verification voltage applied to word lines of the memory cells when performing an erase verification operation to thereby detect cells which are not erased, and a control circuit configured to control the peripheral circuits by changing a sensing reference level for determining the voltage change of the bit lines when the cells which are not erased are detected when performing the erase verification operation, so that the erase verification operation is repeatedly performed.