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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.:

US 11316095 B1

PDFFull Text
Date of Patent:
Apr. 26, 2022

Filed:

Mar. 12, 2020

Magnetic device which improves write error rate while maintaining retention properties

Applicant:

Kioxia Corporation, Tokyo, JP;

Inventors:

Tadaaki Oikawa, Seoul, KR;

Young Min Eeh, Seongnam-si, KR;

Kenichi Yoshino, Seongnam-si, KR;

Eiji Kitagawa, Seoul, KR;

Kazuya Sawada, Seoul, KR;

Taiga Isoda, Seoul, KR;

Assignee:

KIOXIA CORPORATION, Tokyo, JP;

Attorney:

Holtz, Holtz & Volek PC

Primary Examiner:

Jami Valentine Miller

Int. Cl.
CPC ...
H01L 43/02 (2006.01); H01L 27/22 (2006.01); H01L 43/10 (2006.01); H01L 43/12 (2006.01); G11C 11/16 (2006.01); H01F 10/32 (2006.01);
U.S. Cl.
CPC ...
H01L 43/02 (2013.01); G11C 11/161 (2013.01); G11C 11/1659 (2013.01); H01F 10/3254 (2013.01); H01F 10/3268 (2013.01); H01L 27/224 (2013.01); H01L 43/10 (2013.01); H01L 43/12 (2013.01); H01F 10/329 (2013.01); H01F 10/3286 (2013.01);
Abstract

According to one embodiment, a magnetic device includes a layer stack. The layer stack includes a first ferromagnetic layer, a second ferromagnetic layer, a first nonmagnetic layer between the first ferromagnetic layer and the second ferromagnetic layer, and a second nonmagnetic layer. The first ferromagnetic layer is interposed between the second nonmagnetic layer and the first nonmagnetic layer. The first nonmagnetic layer and the second nonmagnetic layer contain a magnesium oxide (MgO). The first ferromagnetic layer contains a higher amount of boron (B) at an interface with the first nonmagnetic layer than at an interface with the second nonmagnetic layer.

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