METHOD OF MANUFACTURING MRAM DEVICE WITH ENHANCED ETCH CONTROL

    公开(公告)号:US20230380291A1

    公开(公告)日:2023-11-23

    申请号:US18230358

    申请日:2023-08-04

    CPC classification number: H10N50/01 H10B61/22 H10N50/80

    Abstract: A method of manufacturing a semiconductor device includes: forming a substrate over the substrate, the substrate defining a logic region and a memory region; depositing a bottom electrode layer across the logic region and the memory region; depositing a magnetic tunnel junction (MTJ) layer over the bottom electrode layer; depositing a first conductive layer over the MTJ layer; depositing a sacrificial layer over the first conductive layer; etching the sacrificial layer in the memory region to expose the first conductive layer in the memory region while keeping the first conductive layer in the logic region covered; depositing a second conductive layer in the memory region and the logic region; patterning the second conductive layer to expose the MTJ layer in the memory region; and etching the patterned second conductive layer and the MTJ layer to form a top electrode and an MTJ, respectively, in the memory region.

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