ANGLED ETCH TO ENABLE TIN REMOVAL FROM SELECTED SIDEWALLS

    公开(公告)号:US20230102900A1

    公开(公告)日:2023-03-30

    申请号:US17485162

    申请日:2021-09-24

    申请人: Intel Corporation

    摘要: A method of fabricating an integrated circuit structure comprises depositing an oxide insulator layer over a substrate having fins. A gate trench is formed within the oxide insulator layer with the fins extending above a surface of the oxide insulator layer within the gate trench. A semiconducting oxide material is deposited to conformally cover the oxide insulator layer, including on top surfaces and sidewalls of both the gate trench and the fins. A gate material is deposited to conformally cover the semiconducting oxide material, including on top surfaces and sidewalls of both the gate trench and the fins. An angled etch is performed to remove the gate material selective to the semiconducting oxide material from sidewalls of the gate trench, but not from sidewalls of the fins.