Invention Grant
- Patent Title: Method of manufacturing a magnetoresistive-based device with via integration
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Application No.: US13801419Application Date: 2013-03-13
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Publication No.: US08790935B1Publication Date: 2014-07-29
- Inventor: Kerry Nagel , Sarin Deshpande , Moazzern Hossain , Sanjeev Aggarwal
- Applicant: Everspin Technologies, Inc.
- Applicant Address: US AZ Chandler
- Assignee: EverSpin Technologies, Inc.
- Current Assignee: EverSpin Technologies, Inc.
- Current Assignee Address: US AZ Chandler
- Agency: Ingrassia Fisher & Lorenz, P.C.
- Main IPC: H01L21/00
- IPC: H01L21/00 ; G11C11/00

Abstract:
A method is provided for forming a first via with an electrically conductive material, for example, copper, that is formed over and coupled to a conductive landing pad of an MRAM array. A sputter step is performed to lower the surface of the first via below that of a surrounding dielectric material. This recess is repeated in subsequent processing steps, providing alignment marks for the formation of a magnetic tunnel junction. The magnetic tunnel junction may be offset from the first via, and a second via being formed above the magnetic tunnel junction and to a conductive layer.
Information query
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