Backside metal photolithographic patterning die singulation systems and related methods

    公开(公告)号:US11508579B2

    公开(公告)日:2022-11-22

    申请号:US17134717

    申请日:2020-12-28

    摘要: Implementations of die singulation systems and related methods may include forming a plurality of die on a first side of a substrate, forming a backside metal layer on a second side of a substrate, applying a photoresist layer over the backside metal layer, patterning the photoresist layer along a die street of the substrate, and forming a groove at the pattern of the photoresist layer only partially through a thickness of the backside metal layer. The groove may be located in the die street of the substrate. The method may also include etching through a remaining portion of the backside metal layer located in the die street, removing the photoresist layer, and singulating the plurality of die included in the substrate by removing substrate material in the die street.

    Substrate alignment systems and related methods

    公开(公告)号:US11387130B2

    公开(公告)日:2022-07-12

    申请号:US16505949

    申请日:2019-07-09

    摘要: Implementations of a method of making a plurality of alignment marks on a wafer may include: providing a wafer including an alignment feature on a first side of the wafer. The method may include aligning the wafer using a camera focused on the first side of the wafer. The wafer may be aligned using the alignment feature on the first side of the die. The wafer may also include creating a plurality of alignment marks on a second side of the wafer through lasering, sawing, or scribing.

    Methods of aligning a semiconductor wafer for singulation

    公开(公告)号:US11289381B2

    公开(公告)日:2022-03-29

    申请号:US17068129

    申请日:2020-10-12

    摘要: Implementations of a method for aligning a semiconductor wafer for singulation may include: providing a semiconductor wafer having a first side and a second side. The first side of the wafer may include a plurality of die and the plurality of die may be separated by streets. The semiconductor wafer may include an edge ring around a perimeter of the wafer on the second side of the wafer. The wafer may also include a metal layer on the second side of the wafer. The metal layer may substantially cover the edge ring. The method may include grinding the edge ring to create an edge exclusion area and aligning the semiconductor wafer with a saw using a camera positioned in the edge exclusion area on the second side of the wafer. Aligning the wafer may include using three or more alignment features included in the edge exclusion area.

    Semiconductor wafer and method of ball drop on thin wafer with edge support ring

    公开(公告)号:US11164835B2

    公开(公告)日:2021-11-02

    申请号:US15871586

    申请日:2018-01-15

    IPC分类号: H01L23/00 H01L21/48 B23K3/06

    摘要: A semiconductor wafer has an edge support ring around a perimeter of the semiconductor wafer and conductive layer formed over a surface of the semiconductor wafer within the edge support ring. A first stencil is disposed over the edge support ring with first openings aligned with the conductive layer. The first stencil includes a horizontal portion over the edge support ring, and a step-down portion extending the first openings to the conductive layer formed over the surface of the semiconductor wafer. The horizontal portion may have a notch with the edge support ring disposed within the notch. A plurality of bumps is dispersed over the first stencil to occupy the first openings over the conductive layer. A second stencil is disposed over the edge support ring with second openings aligned with the conductive layer to deposit a flux material in the second openings over the conductive layer.

    Methods for loading or unloading substrate with evaporator planet

    公开(公告)号:US11114329B2

    公开(公告)日:2021-09-07

    申请号:US16734540

    申请日:2020-01-06

    摘要: Implementations of methods of loading an evaporator may include, using a robotic arm, removing a substrate from a cassette and centering the substrate on a substrate aligner. The method may include aligning the substrate using the substrate aligner. The substrate may also include removing the substrate from the substrate aligner using the robotic arm and loading the substrate into a first available pocket of a planet of an evaporator using the robotic arm. The method may also include rotating the planet to a second available pocket after detecting a presence of the substrate in the first available pocket.