- Patent Title: Magnetic random access memory device and formation method thereof
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Application No.: US16809998Application Date: 2020-03-05
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Publication No.: US11264561B2Publication Date: 2022-03-01
- Inventor: Ming-Che Ku , Jun-Yao Chen , Sheng-Huang Huang , Jiun-Yu Tsai , Harry-Hak-Lay Chuang , Hung-Cho Wang
- Applicant: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Applicant Address: TW Hsinchu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee Address: TW Hsinchu
- Agency: Maschoff Brennan
- Main IPC: H01L43/02
- IPC: H01L43/02 ; H01L27/22 ; H01L43/12

Abstract:
A method of forming a magnetic random access memory (MRAM) device includes forming a bottom electrode layer over a substrate including an inter-metal dielectric (IMD) layer having a metal line therein; forming a barrier layer over the bottom electrode layer; forming a magnetic tunnel junction (MTJ) layer stack over the bottom electrode layer; forming a dielectric layer over the MTJ layer stack; forming an opening in the dielectric layer to expose the barrier layer; filling the opening in the dielectric layer with a top electrode; after filling the opening in the dielectric layer with the top electrode, etching the dielectric layer to expose the barrier layer; and patterning the MTJ layer stack to form an MTJ stack that exposes the bottom electrode layer.
Public/Granted literature
- US20210057639A1 MAGNETIC RANDOM ACCESS MEMORY DEVICE AND FORMATION METHOD THEREOF Public/Granted day:2021-02-25
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