2.
    发明专利
    未知

    公开(公告)号:DE3788471T2

    公开(公告)日:1994-06-23

    申请号:DE3788471

    申请日:1987-07-10

    Applicant: IBM

    Abstract: A process for the fabrication of a vertically differentiated semiconductor structure is disclosed. In this process the semiconductor structure is covered with a vertical erosion control mask (13, Fig. 3). The control mask covering at least one horizontal surface (7) of the semiconductor structure is removed leaving the vertical surface covering (13) intact (Fig. 5). An isotropic etching of the uncovered horizontal surface (7) next occurs. Finally, the control mask covering (13) of the vertical surface (11) of the semiconductor structure is removed (Fig. 1). This process permits etching treatment of horizontal surface defects without adverse effect on the vertical surface (11) of the semiconductor structure.

    3.
    发明专利
    未知

    公开(公告)号:DE3788471D1

    公开(公告)日:1994-01-27

    申请号:DE3788471

    申请日:1987-07-10

    Applicant: IBM

    Abstract: A process for the fabrication of a vertically differentiated semiconductor structure is disclosed. In this process the semiconductor structure is covered with a vertical erosion control mask (13, Fig. 3). The control mask covering at least one horizontal surface (7) of the semiconductor structure is removed leaving the vertical surface covering (13) intact (Fig. 5). An isotropic etching of the uncovered horizontal surface (7) next occurs. Finally, the control mask covering (13) of the vertical surface (11) of the semiconductor structure is removed (Fig. 1). This process permits etching treatment of horizontal surface defects without adverse effect on the vertical surface (11) of the semiconductor structure.

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