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:
Oct. 18, 2022
Filed:
Jun. 23, 2020
Alps Alpine Co., Ltd., Tokyo, JP;
Masamichi Saito, Miyagi-ken, JP;
Fumihito Koike, Miyagi-ken, JP;
ALPS ALPINE CO., LTD., Tokyo, JP;
Abstract
A tunnel magnetoresistance effect (TMR) device includes an exchange coupling film having a first ferromagnetic layer, which is at least a portion of a fixed magnetic layer, and an antiferromagnetic layer laminated on the first ferromagnetic layer. The ferromagnetic layer includes an X(Cr—Mn) layer containing one or two or more elements X selected from the group consisting of the platinum group elements and Ni, and also containing Mn and Cr. The X(Cr—Mn) layer has a first region relatively near the first ferromagnetic layer, and a second region relatively far away from the first ferromagnetic layer, and the content of Mn in the first region is higher than that in the second region.