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. 30, 2025
Filed:
Jun. 09, 2022
Applicant:
SK Hynix Inc., Icheon-si, KR;
Inventor:
Dae Sung Eom, Icheon-si, KR;
Assignee:
SK hynix Inc., Icheon-si, KR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10B 41/27 (2023.01); H01L 23/522 (2006.01); H01L 23/528 (2006.01); H10B 41/40 (2023.01); H10B 43/27 (2023.01); H10B 43/40 (2023.01);
U.S. Cl.
CPC ...
H10B 41/27 (2023.02); H01L 23/5226 (2013.01); H01L 23/5283 (2013.01); H10B 41/40 (2023.02); H10B 43/27 (2023.02); H10B 43/40 (2023.02);
Abstract
A semiconductor memory device includes: a semiconductor substrate including a first region and a second region; a memory cell array over the first region of the semiconductor substrate; a dummy stack structure over the second region of the semiconductor substrate; a chip guard structure penetrating the dummy stack structure; and a void-containing structure penetrating the dummy stack structure.