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Patent Searching and Data


Title:
POSITION SENSING ELEMENT AND POSITION SENSOR USING SAME
Document Type and Number:
WIPO Patent Application WO/2019/131393
Kind Code:
A1
Abstract:
Provided are: a position sensing element which is provided with an exchange coupled film that has a large exchange coupling magnetic field; and a position sensor which has good sensing accuracy in a high temperature environment. A position sensing element 11 which is provided with an exchange coupled film 10 that has a fixed magnetic layer 4 and an antiferromagnetic layer 5 which is superposed on the fixed magnetic layer 4. This position sensing element 11 is configured such that: the antiferromagnetic layer 5 comprises an X(Cr-Mn) layer which contains Mn, Cr and one or more elements X that are selected from the group consisting of platinum group elements and Ni; the X(Cr-Mn) layer comprises a PtMn layer 5A, which is a first region R1 that is relatively proximal to the fixed magnetic layer 4, and a PtCr layer 5B, which is a second region R2 that is relatively distal to the fixed magnetic layer 4; and the Mn content in the first region R1 is higher than the Mn content in the second region R2.

Inventors:
SAITO, Masamichi (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
KOIKE, Fumihito (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
Application Number:
JP2018/046841
Publication Date:
July 04, 2019
Filing Date:
December 19, 2018
Export Citation:
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Assignee:
ALPS ALPINE CO., LTD. (1-7 Yukigaya-otsukamachi, Ota-ku Tokyo, 01, 〒1458501, JP)
International Classes:
H01L43/08; G01B7/00; G01B7/30; G01D5/16; G11B5/39; H01F10/30; H01L43/10
Attorney, Agent or Firm:
OKUBO, Katsuyuki (7th Floor, SEIBUNDO Building 4-3-26, Kudan-kita, Chiyoda-k, Tokyo 73, 〒1020073, JP)
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