METHOD FOR PRODUCING COMPOSITE STRUCTURE WITH METAL/METAL BONDING
    5.
    发明申请
    METHOD FOR PRODUCING COMPOSITE STRUCTURE WITH METAL/METAL BONDING 审中-公开
    用金属/金属结合生产复合结构的方法

    公开(公告)号:WO2014001868A1

    公开(公告)日:2014-01-03

    申请号:PCT/IB2013/001250

    申请日:2013-06-05

    Applicant: SOITEC

    Abstract: Method for producing a composite structure (200), comprising the direct bonding of at least one first wafer (220) with a second wafer (230), and comprising a step of initiating the propagation of a bonding wave, where the bonding interface between the first and second wafers (220, 230) after the propagation of said bonding wave has a bonding energy of less than or equal to 0.7 J/m2. The step of initiating the propagation of the bonding wave is performed under one or more of the following conditions: - placement of the wafers in an environment at a pressure of less than 20 mbar, - application to one of the two wafers of a mechanical pressure of between 0.1 MPa and 33.3 MPa. The method further comprises, after the step of initiating the propagation of a bonding wave, a step of determining the level of stress induced during bonding of the two wafers, said level of stress being determined on the basis of a stress parameter Ct calculated using the formula Ct = Rc/Ep, where: Rc corresponds to the radius of curvature (in km) of the two- wafer assembly and Ep corresponds to the thickness (in μm) of the two-wafer assembly. The method further comprises a step of validating the bonding when the level of stress Ct determined is greater than or equal to 0.07.

    Abstract translation: 一种用于生产复合结构(200)的方法,包括至少一个第一晶片(220)与第二晶片(230)的直接结合,并且包括启动键合波的传播的步骤,其中, 在所述键合波的传播之后的第一和第二晶片(220,230)具有小于或等于0.7J / m 2的结合能。 启动粘合波传播的步骤是在以下一个或多个条件下进行的: - 将晶片放置在小于20毫巴的压力的环境中, - 施加到两个晶片之一的机械压力 在0.1MPa和33.3MPa之间。 该方法还包括在开始粘合波的传播的步骤之后,确定在两个晶片的接合期间引起的应力水平的步骤,所述应力水平是基于使用 公式Ct = Rc / Ep,其中:Rc对应于两晶片组件的曲率半径(km),Ep对应于两晶片组件的厚度(以mam计)。 该方法还包括当确定的应力Ct大于或等于0.07时验证接合的步骤。

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