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. 19, 2017
Filed:
Feb. 10, 2016
SK Hynix Inc., Icheon-si, Gyeonggi-do, KR;
Jung Ryul Ahn, Namyangju-si, KR;
SK hynix Inc., Icheon-si, Gyeonggi-do, KR;
Abstract
A semiconductor memory device may include first and second sub-cell strings. The first sub-cell string may be coupled to a common source line at an end of the first sub-cell string. The first sub-cell string may have a first group of normal memory cells and at least one source-side middle dummy memory cell coupled to the first sub-cell string and the first group of the normal memory cells. The second sub-cell string may be coupled to a bit line at an end of the second sub-cell string. The second sub-cell string may have a second group of normal memory cells and drain-side middle dummy memory cells coupled to the second group the normal memory cells. The number of the drain-side middle dummy memory cells may be greater than the number of the at least one source-side middle dummy memory cell.