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:
May. 03, 2022
Filed:
Sep. 04, 2020
Applicant:
Kioxia Corporation, Tokyo, JP;
Inventor:
Satoshi Wakatsuki, Yokkaichi, JP;
Assignee:
Kioxia Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/532 (2006.01); H01L 23/538 (2006.01); H01L 21/768 (2006.01); H01L 25/065 (2006.01);
U.S. Cl.
CPC ...
H01L 23/53228 (2013.01); H01L 21/76838 (2013.01); H01L 23/5385 (2013.01); H01L 23/5386 (2013.01); H01L 25/0655 (2013.01);
Abstract
A semiconductor storage device according to an embodiment includes: an array chip having a memory cell array; a circuit chip having a circuit electrically connected to a memory cell; and a metal pad bonding the array chip and the circuit chip together. The metal pad includes an impurity. A concentration of the impurity is lowered as separating in a depth direction apart from a surface in a thickness direction of the metal pad.