- Patent Title: Spin-transfer torque memory (STTM) devices having magnetic contacts
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Application No.: US16214306Application Date: 2018-12-10
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Publication No.: US10580973B2Publication Date: 2020-03-03
- Inventor: Brian S. Doyle , Kaan Oguz , Charles C. Kuo , Mark L. Doczy , Satyarth Suri , David L. Kencke , Robert S. Chau , Roksana Golizadeh Mojarad
- Applicant: INTEL CORPORATION
- Applicant Address: US CA Santa Clara
- Assignee: INTEL CORPORATION
- Current Assignee: INTEL CORPORATION
- Current Assignee Address: US CA Santa Clara
- Agency: Finch & Maloney PLLC
- Main IPC: H01L43/02
- IPC: H01L43/02 ; H01L43/08 ; H01L27/22 ; H01L43/12 ; G11C11/16

Abstract:
Techniques are disclosed for forming integrated circuit structures including a magnetic tunnel junction (MTJ), such as spin-transfer torque memory (STTM) devices, having magnetic contacts. The techniques include incorporating an additional magnetic layer (e.g., a layer that is similar or identical to that of the magnetic contact layer) such that the additional magnetic layer is coupled antiferromagnetically (or in a substantially antiparallel manner). The additional magnetic layer can help balance the magnetic field of the magnetic contact layer to limit parasitic fringing fields that would otherwise be caused by the magnetic contact layer. The additional magnetic layer may be antiferromagnetically coupled to the magnetic contact layer by, for example, including a nonmagnetic spacer layer between the two magnetic layers, thereby creating a synthetic antiferromagnet (SAF). The techniques can benefit, for example, magnetic contacts having magnetic directions that are substantially in-line or substantially in-plane with the layers of the MTJ stack.
Public/Granted literature
- US20190109281A1 SPIN-TRANSFER TORQUE MEMORY (STTM) DEVICES HAVING MAGNETIC CONTACTS Public/Granted day:2019-04-11
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