Fluxless heat spreader bonding with cold form solder
    61.
    发明申请
    Fluxless heat spreader bonding with cold form solder 审中-公开
    无焊散热器与冷成型焊料接合

    公开(公告)号:US20070152321A1

    公开(公告)日:2007-07-05

    申请号:US11323904

    申请日:2005-12-29

    IPC分类号: H01L23/12 H01L21/50

    摘要: The formation of electronic assemblies including a heat spreader coupled to at least one die is described. One embodiment relates to a method including positioning a solder on a heat spreader. The method also includes forming a solid state diffusion bond between the solder and the heat spreader. The solid state diffusion bonded solder and heat spreader are positioned on a die and heated to a temperature sufficient to melt the solder and form a bond between the solder and the die, in the absence of a flux. Other embodiments are described and claimed.

    摘要翻译: 描述了包括耦合到至少一个管芯的散热器的电子组件的形成。 一个实施例涉及一种包括将焊料定位在散热器上的方法。 该方法还包括在焊料和散热器之间形成固态扩散接合。 固态扩散焊接和散热器位于模具上并加热至足以熔化焊料的温度,并在不存在焊剂的情况下在焊料和管芯之间形成结合。 描述和要求保护其他实施例。

    Temperature resistant hermetic sealing formed at low temperatures for MEMS packages
    64.
    发明申请
    Temperature resistant hermetic sealing formed at low temperatures for MEMS packages 审中-公开
    MEMS封装在低温下形成耐温密封密封

    公开(公告)号:US20050253282A1

    公开(公告)日:2005-11-17

    申请号:US10833978

    申请日:2004-04-27

    申请人: Daoqiang Lu John Heck

    发明人: Daoqiang Lu John Heck

    IPC分类号: B81B7/00 H01L23/10 H01L21/44

    CPC分类号: B81C1/00269

    摘要: Certain hermetically sealed devices, such as micro-electromechanical systems (MEMS), may be sensitive high processing temperatures. However, the seal should be able to withstand higher temperatures that may be encountered, for example during device operation. Hermetic sealing may be realized by a fluxless soldering approach that comprises solder combinations that contain a low-melting-point (LMP) component such as Indium (In) or Tin (Sn) and a high-melting-point (HMP) component such as gold (Au), silver (Ag), or copper (Cu). The LMP/HMP ratio is selected to be HMP component rich so that the LMP component is essentially depleted resulting in an intermetallic compound (IMC) that has a higher melting point than the original HMP/LMP processing temperature after bonding and thermal annealing.

    摘要翻译: 某些密封的装置,例如微机电系统(MEMS),可能是敏感的高处理温度。 然而,密封件应该能够承受可能遇到的更高的温度,例如在设备操作期间。 密封可以通过无焊剂焊接方法实现,其包括含有低熔点(LMP)组分如铟(In)或锡(Sn)和高熔点(HMP)组分的焊料组合,例如 金(Au),银(Ag)或铜(Cu)。 选择LMP / HMP比为富含HMP成分,使得LMP组分基本上耗尽,导致在接合和热退火后具有比原始HMP / LMP处理温度更高的熔点的金属间化合物(IMC)。

    Fluxless die-to-heat spreader bonding using thermal interface material
    66.
    发明授权
    Fluxless die-to-heat spreader bonding using thermal interface material 失效
    使用热界面材料的无焊模具散热器粘合

    公开(公告)号:US06833289B2

    公开(公告)日:2004-12-21

    申请号:US10436677

    申请日:2003-05-12

    申请人: Chuan Hu Daoqiang Lu

    发明人: Chuan Hu Daoqiang Lu

    IPC分类号: H01L2150

    摘要: A thinned semiconductor die is coupled to an integrated heat spreader with thermal interface material to form a semiconductor package. The method for forming the package comprises forming a metallization layer on a backside of a thinned semiconductor die. A thermal interface portion, including a solder layer including a fluxlessly-capable solder such as AuSn, is formed on the topside of the integrated heat spreader. The metallization layer and the solder layer are then forced together under load and heat without flux to bond the semiconductor die to the integrated heat spreader.

    摘要翻译: 减薄的半导体管芯与具有热界面材料的集成散热器耦合以形成半导体封装。 用于形成封装的方法包括在薄化的半导体管芯的背面上形成金属化层。 在集成散热器的顶侧上形成有包括无助焊剂如AuSn的焊料层的热界面部分。 然后将金属化层和焊料层在负载和热力下一起被压在一起,而没有焊剂将半导体管芯结合到集成散热器。