Method of plasma etching
    35.
    发明授权

    公开(公告)号:US12087593B2

    公开(公告)日:2024-09-10

    申请号:US17806944

    申请日:2022-06-15

    发明人: Shih Pin Kuo

    摘要: The present disclosure provides a method of plasma etching including the following operations. A wafer and a nitride layer disposed on the wafer are received. An annular conduit is disposed above an edge portion of the nitride layer, in which the annular conduit has a plurality of holes facing the edge portion of the nitride layer. A plasma is sprayed onto an upper surface of the nitride layer. An unsaturated fluorocarbon is sprayed from the holes of the annular conduit to the edge portion of the nitride layer.