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    • 10. 发明公开
    • SEMICONDUCTOR DEVICE WITH A BARRIER LAYER FORMED BY ELECTROMIGRATION
    • 有电因迁移生产的结半导体COMPONENT
    • EP3176821A1
    • 2017-06-07
    • EP16197690.7
    • 2016-11-08
    • TOYOTA JIDOSHA KABUSHIKI KAISHA
    • KADOGUCHI, TakuyaTAKE, Naoya
    • H01L23/488H01L21/60H01L25/18
    • H01L23/49562H01L23/3121H01L23/4951H01L23/49568H01L23/49582H01L24/29H01L24/32H01L24/33H01L25/072H01L25/18H01L29/7395H01L29/861H01L2224/291H01L2224/29111H01L2224/29116H01L2224/29147H01L2224/29155H01L2224/32245H01L2224/32503H01L2224/33181H01L2224/83447H01L2224/83455H01L2224/83909H01L2924/014H01L2924/1203H01L2924/12032H01L2924/12036H01L2924/13055H02M7/003H01L2924/00014H01L2924/0105H01L2924/00012
    • A semiconductor device (10, 50) includes a semiconductor element (20, 70, 80, 90, 100) and an electrically conductive member (14, 66, 68, 74, 84). The semiconductor element (e.g. a diode (20, 90, 100) or an IGBT (70, 80)) is configured to allow an electric current to flow from a first electrode (21, 71, 81, 91, 101) to a second electrode (22, 72, 82, 92, 102) and prevent an electric current flowing from the second electrode (22, 72, 82, 92, 102) to the first electrode (21, 71, 81, 91, 101). The conductive member (14, 66, 68, 74, 84) is joined with the second electrode (22, 72, 82, 92, 102) (e.g., the cathode electrode of the diode (20, 90, 100) or the emitter electrode of the IGBT (70, 80)) via a solder joint layer (34, 77, 87, 98, 108). Surface of the second electrode (22, 72, 82, 92, 102) in contact with the solder joint layer (34, 77, 87, 98, 108) mainly comprises nickel, and surface of the conductive member (14, 66, 68, 74, 84) in contact with the solder joint layer (34, 77, 87, 98, 108) mainly comprises copper. The solder joint layer (34, 77, 87, 98, 108) comprises first and second compound layers (34a, 77a, 87a, 98a, 108a, 34c, 77c, 87c, 98c, 108c). The first compound layer (34a, 77a, 87a, 98a, 108a) is located at an interface with the second electrode (22, 72, 82, 92, 102) and comprises a nickel-tin based intermetallic compound. The second compound layer (34c, 77c, 87c, 98c, 108c) is located at an interface with the conductive member (14, 66, 68, 74, 84) and comprises a copper-tin based intermetallic compound. When electrons flow from the conductive member (14, 66, 68, 74, 84) toward the semiconductor element (20, 70, 80, 90, 100), the copper-tin based intermetallic compound that configures the second compound layer (34c, 77c, 87c, 98c, 108c) moves toward the first compound layer (34a, 77a, 87a, 98a, 108a) due to electromigration, and is deposited on the first compound layer (34a, 77a, 87a, 98a, 108a). Consequently, a barrier layer (34d, 77d, 87d, 98d, 108d) is formed on the first compound layer (34a, 77a, 87a, 98a, 108a).
    • 一种半导体器件(10,50)包括:半导体元件(20,70,80,90,100)和导电元件(14,66,68,74,84)的。 半导体元件(例如,二极管(20,90,100)或IGBT(70,80))被配置为允许电流从第一电极(21,71,81,91,101)流向第二 电极(22,72,82,92,102),并防止从所述第二电极(22,72,82,92,102)与第一电极(21,71,81,91,101)中流动的电流。 导电构件(14,66,68,74,84)接合与所述第二电极(22,72,82,92,102)(例如,二极管(20,90的阴极电极,100)或发射极 经由焊料接合层(34,77,87,98,108)的IGBT(70,80))的电极。 与焊料接合层(34,77,87,98,108)接触的第二电极(22,72,82,92,102)的表面主要包括镍,并且所述导电构件(14,66,68的表面 ,74,84)与焊料接合层(34,77,87,98,108)接触主要包括铜。 焊点层(34,77,87,98,108)包括第一和第二化合物层(34A,77A,87A,98A,108A,34C,77C,87C,98C,108C)。 第一化合物层(34A,77A,87A,98A,108A)位于在与第二电极(22,72,82,92,102)接口,并包括镍 - 锡基于金属间化合物。 第二化合物层(34C,77C,87C,98C,108C)位于在与所述导电元件(14,66,68,74,84)接口,并且包括铜 - 锡系金属间化合物。 当电子从导电构件(14,66,68,74,84)朝向所述半导体元件(20,70,80,90,100)流动时,铜锡系金属间化合物没有配置第二化合物层(34C, 77C,87C,98C,108C)朝向第一化合物层(34A,77A,87A,98A移动,108A)由于电迁移,并沉积在第一化合物层(上图34A,77A,87A,98A,108A)。 因此,阻挡层(34D,77D,87D,98D,108D)形成在第一化合物层(34A,77A,87A,98A,108A)。