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    • 7. 发明授权
    • Heat sink for semiconductors and manufacturing process thereof
    • 半导体散热片及其制造工艺
    • US6031285A
    • 2000-02-29
    • US120453
    • 1998-07-23
    • Yoshiki Nishibayashi
    • Yoshiki Nishibayashi
    • B22D19/14B22F7/00C04B35/52C22C26/00H01L21/48H01L23/36H01L23/373H05K7/20H01L23/10
    • H01L23/3733C22C26/00H01L21/4871H01L23/3732H01L2924/0002Y10T428/12806Y10T428/252
    • A highly heat conductive heat sink comprising diamond particles yet eliminating heat distortion problems caused by the difference in thermal expansion with a semiconductor, and a manufacturing method thereof. Melting of an alloy (C), which comprises a metal (A) of at least one metal selected from the group consisting of Cu, Ag, Au, Al, Mg, and Zn; and a metal (B) of at least one metal selected from the group consisting of the groups 4a and 5a of the Periodic Table and chromium, around diamond particles forms on the surface thereof a metal carbide (B'), which enables the strong bonding between the diamond particles and the metal (A) and thus produces a highly heat conductive heat sink having a much higher thermal conductivity than the metal (A). This structure is attainable by either an infiltration method or sintering method. A special feature, or effectiveness, of the invention lies in that the metal carbide (B') is formed on the surface of the diamond particles at the same time as or after the formation of a metal matrix. It is essential that not less than a quarter of the surface of the diamond particles be covered with the metal carbide (B') and the diamond particles be separated with one another by metal.
    • 一种包含金刚石颗粒的高导热性散热器及其制造方法,其消除了与半导体的热膨胀差异引起的热变形问题。 熔融合金(C),其包含选自Cu,Ag,Au,Al,Mg和Zn中的至少一种金属的金属(A); 并且选自周期表中的4a和5a族中的至少一种金属的金属(B)和金刚石颗粒周围的铬形成金属碳化物(B'),金属碳化物(B')能够强结合 在金刚石颗粒和金属(A)之间,并且因此产生具有比金属(A)高得多的热导率的高导热性散热器。 这种结构可以通过渗透法或烧结法获得。 本发明的特殊特征或有效性在于金属碳化物(B')在形成金属基质的同时或之后形成在金刚石颗粒的表面上。 金属碳化物(B')不得少于四分之一的金刚石颗粒表面被金属碳化物(B')覆盖,金刚石颗粒彼此分开。