Semiconductor device having lead with back and end surfaces provided with plating layers

    公开(公告)号:US10727169B2

    公开(公告)日:2020-07-28

    申请号:US16364517

    申请日:2019-03-26

    申请人: Rohm Co., Ltd.

    发明人: Koshun Saito

    摘要: A semiconductor device includes a semiconductor element, a plurality of leads electrically connected to the semiconductor element and one of which supports the semiconductor element, a sealing resin covering the semiconductor element and a portion of each leads, and first and second plating layers exposed from the sealing resin. The sealing resin includes a resin side surface facing in a first direction perpendicular to the thickness direction. At least one of the leads has a lead end surface connected to its back surface and flush with the resin side surface. The first plating layer covers the back surface of the lead. The second plating layer covers the lead end surface and projects in the first direction relative to the resin side surface. An edge of the second plating layer overlaps with the first plating layer as viewed in the first direction.

    LEAK CHECK METHOD, LEAK CHECK APPARATUS, PLATING METHOD, AND PLATING APPARATUS

    公开(公告)号:US20200209099A1

    公开(公告)日:2020-07-02

    申请号:US16711983

    申请日:2019-12-12

    申请人: EBARA CORPORATION

    摘要: A leak check method includes: performing a first inspection of measuring a pressure in an internal space formed by a seal of the substrate holder, while evacuating the internal space, and detecting that the pressure reaches a first pressure threshold value within a predetermined first inspection time; performing a second inspection of closing the internal space that has been evacuated, measuring the pressure in the closed internal space, and detecting that the pressure in the closed internal space does not exceed a second pressure threshold value within a predetermined second inspection time; and performing a third inspection of measuring a pressure difference between the pressure in the closed internal space and a vacuum pressure in a master container, and detecting that an amount of increase in the pressure difference within a predetermined third inspection time is kept equal to or below a pressure difference threshold value.