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    • 3. 发明授权
    • Wafer bonding method, apparatus and vacuum chuck
    • 晶圆接合方法,设备和真空吸盘
    • US06383890B2
    • 2002-05-07
    • US09211875
    • 1998-12-15
    • Toru TakisawaTakao YoneharaKenji Yamagata
    • Toru TakisawaTakao YoneharaKenji Yamagata
    • H01L2130
    • H01L21/67092H01L21/6838
    • Two wafers are properly brought into contact with each other. The first wafer is supported by a wafer support table (3) having an annular peripheral portion (3d). The substrate support table (3) is in contact with only the peripheral portion (3d) of the first wafer. While the second wafer opposing the first wafer is supported, the lower surface of the second wafer is pressed near its central portion, so the first and second wafers come into contact with each other outward from the central portion. The central portion (3c) of the wafer support table (3) is not in contact with the first wafer. Even when particles adhere to the central portion, unevenness on the supported first wafer can be prevented. Therefore, no gas is left between the wafers. This invention also provides a wafer support table formed by fabricating a silicon wafer. A commercially available silicon wafer is fabricated by lithography to prepare a wafer support table (31). The wafer support table (31) has sealing portions (31a, 31b) and deflection prevention portions (31c). The wafer to be supported is chucked by reducing the pressure between the sealing portions (31a, 31b). The wafer to be supported is in contact only with the sealing portions (31a, 31b) and the deflection prevention portions (31c)
    • 两个晶片正确地相互接触。 第一晶片由具有环形周边部分(3d)的晶片支撑台(3)支撑。 基板支撑台(3)仅与第一晶片的周边部分(3d)接触。 当与第一晶片相对的第二晶片被支撑时,第二晶片的下表面被压在其中心部分附近,因此第一和第二晶片从中心部分向外接触。 晶片支撑台(3)的中心部分(3c)不与第一晶片接触。 即使当颗粒粘附到中心部分时,也可以防止被支撑的第一晶片上的不均匀。 因此,晶片之间没有气体留下。 本发明还提供了通过制造硅晶片形成的晶片支撑台。 通过光刻制造市售硅晶片以制备晶片支撑台(31)。 晶片支撑台(31)具有密封部(31a,31b)和偏转防止部(31c)。 通过减小密封部(31a,31b)之间的压力来夹持待支撑的晶片。 待支撑的晶片仅与密封部分(31a,31b)和偏转防止部分(31c)接触,