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:
Apr. 25, 2023
Filed:
May. 26, 2020
Applicant:
SK Hynix Inc., Icheon-si, KR;
Inventors:
Seung Wook Ryu, Yongin-si, KR;
Ki Hong Lee, Suwon-si, KR;
Assignee:
SK hynix Inc., Icheon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 27/11556 (2017.01); H01L 27/11582 (2017.01);
U.S. Cl.
CPC ...
H01L 27/11556 (2013.01); H01L 27/11582 (2013.01);
Abstract
A semiconductor memory device includes a first source layer, a second source layer on the first source layer, a stack structure over the second source layer, and a common source line penetrating the stack structure. The second source layer includes a protective layer in contact with the common source line and a conductive layer surrounding the protective layer.