2.
    发明专利
    未知

    公开(公告)号:DE3786851T2

    公开(公告)日:1994-03-17

    申请号:DE3786851

    申请日:1987-05-05

    Applicant: IBM

    Abstract: Laser induced fluorescence is utilized to detect the reactive ion etch-through of a given layer in a wafer by detecting a large change in the concentration of a wafer selected minor species from the wafer in the etching plasma. This selected minor species must be present in a significantly different concentration in the etched given layer compared to any of the other layers in the wafer in order to provide a proper endpoint detection. In one embodiment, when the large change in the selected minor species concentration is detected, then the RF electrodes for the reactor are de-energized.

    4.
    发明专利
    未知

    公开(公告)号:DE3786851D1

    公开(公告)日:1993-09-09

    申请号:DE3786851

    申请日:1987-05-05

    Applicant: IBM

    Abstract: Laser induced fluorescence is utilized to detect the reactive ion etch-through of a given layer in a wafer by detecting a large change in the concentration of a wafer selected minor species from the wafer in the etching plasma. This selected minor species must be present in a significantly different concentration in the etched given layer compared to any of the other layers in the wafer in order to provide a proper endpoint detection. In one embodiment, when the large change in the selected minor species concentration is detected, then the RF electrodes for the reactor are de-energized.

    METHOD FOR FORMING A COPPER BASED METAL PATTERN

    公开(公告)号:DE3168374D1

    公开(公告)日:1985-02-28

    申请号:DE3168374

    申请日:1981-10-20

    Applicant: IBM

    Abstract: A composite mask (5A, 6A) is formed by sequentially depositing blanket layers (5) and (6) of molybdenum and of a material respectively selected from the group consisting of MgO and Al2O3 on the surface of a copper layer (3), and producing in these layers (5) and (6) a pattern of openings corresponding to the negative of the desired copper pattern (3). Using said mask (5A, 6A) the portions of copper layer (3) exposed in said openings are removed, preferably by dry etching. MgO or Al2O3 adhere well to Mo and Mo adheres well to copper. The Mo layer (5A) also serves as a diffusion barrier for the copper. … The method is applicable in forming copper interconnect metallurgy for components such as semiconductor or dielectric substrates.

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