THINNED SEMICONDUCTOR PACKAGE AND RELATED METHODS

    公开(公告)号:US20250149449A1

    公开(公告)日:2025-05-08

    申请号:US19011340

    申请日:2025-01-06

    Abstract: Implementations of semiconductor packages may include a die having a first side and a second side opposite the first side, a first metal layer coupled to the first side of the die, a tin layer coupled to the first metal layer, the first metal layer between the die and the tin layer, a backside metal layer coupled to the second side of the die, and a mold compound coupled to the die. The mold compound may cover a plurality of sidewalls of the first metal layer and a plurality of sidewalls of the tin layer and a surface of the mold compound is coplanar with a surface of the tin layer.

    SEMICONDUCTOR PACKAGES WITH AN INTERMETALLIC LAYER

    公开(公告)号:US20210327843A1

    公开(公告)日:2021-10-21

    申请号:US17304715

    申请日:2021-06-24

    Abstract: A method of forming a semiconductor package. Implementations include forming on a die backside an intermediate metal layer having multiple sublayers, each including a metal selected from the group consisting of titanium, nickel, copper, silver, and combinations thereof. A tin layer is deposited onto the intermediate metal layer and is then reflowed with a silver layer of a substrate to form an intermetallic layer having a melting temperature above 260 degrees Celsius and including an intermetallic consisting of silver and tin and/or an intermetallic consisting of copper and tin. Another method of forming a semiconductor package includes forming a bump on each of a plurality of exposed pads of a top side of a die, each exposed pad surrounded by a passivation layer, each bump including an intermediate metal layer as described above and a tin layer coupled to the intermediate metal layer is reflowed to form an intermetallic layer.

    SEMICONDUCTOR DEVICE AND METHOD OF FORMING A CURVED IMAGE SENSOR

    公开(公告)号:US20190035718A1

    公开(公告)日:2019-01-31

    申请号:US16148563

    申请日:2018-10-01

    Abstract: A semiconductor device has a semiconductor die containing a base material having a first surface and a second surface with an image sensor area. A masking layer with varying width openings is disposed over the first surface of the base material. The openings in the masking layer are larger in a center region of the semiconductor die and smaller toward edges of the semiconductor die. A portion of the first surface of the base material is removed by plasma etching to form a first curved surface. A metal layer is formed over the first curved surface of the base material. The semiconductor die is positioned over a substrate with the first curved surface oriented toward the substrate. Pressure and temperature is applied to assert movement of the base material to change orientation of the second surface with the image sensor area into a second curved surface.

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