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:
Mar. 07, 2017
Filed:
Feb. 29, 2016
Applicant:
SK Hynix Inc., Icheon-si, Gyeonggi-do, KR;
Inventors:
Assignee:
SK hynix Inc., Icheon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01); G11C 16/10 (2006.01); G11C 11/56 (2006.01); H01L 27/115 (2006.01);
U.S. Cl.
CPC ...
G11C 16/10 (2013.01); G11C 11/5621 (2013.01); G11C 11/5628 (2013.01); G11C 11/5642 (2013.01); G11C 11/5671 (2013.01); G11C 16/0483 (2013.01); H01L 27/11568 (2013.01); H01L 27/11573 (2013.01); H01L 27/11582 (2013.01);
Abstract
A semiconductor memory device includes a memory string including a first cells portion and a second cells portion each including a multiple of memory cells, the second cells portion being disposed over the first cells portion, and a control logic configured to control a peripheral circuit such that each of at least two memory cells in a top of the first cells portion and each of at least two memory cells in a bottom of the second cells portion is programmed to have a smaller data bit than remaining memory cells in the first and second cells portions.