Fully self-aligned interconnect structure

    公开(公告)号:US11361994B2

    公开(公告)日:2022-06-14

    申请号:US16895338

    申请日:2020-06-08

    Abstract: The present disclosure provides a method of forming a semiconductor structure. The method includes providing a semiconductor substrate and forming a patterned metal structure on the semiconductor substrate, wherein the patterned metal structure includes a first metal layer and a second metal layer deposited in a single deposition step. The method further includes etching a portion of the second metal layer thereby forming a metal plug in the second metal layer, the first metal layer of the patterned metal structure having a first metal feature underlying and contacting the metal plug.

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