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    • 2. 发明授权
    • Method for bonding heat sinks to overmolds and device formed thereby
    • 用于将散热器连接到包覆成型体的方法和由此形成的装置
    • US06206997B1
    • 2001-03-27
    • US09248341
    • 1999-02-11
    • Frank D. EgittoMichael A. GaynesRamesh R. KodnaniLuis J. MatienzoMark V. Pierson
    • Frank D. EgittoMichael A. GaynesRamesh R. KodnaniLuis J. MatienzoMark V. Pierson
    • B32B3112
    • B29C59/14H01L21/56H01L24/73H01L2224/32225H01L2224/48091H01L2224/48227H01L2224/48472H01L2224/73265H01L2924/15311H01L2924/00012H01L2924/00H01L2924/00014
    • A method for bonding heat sinks to packaged electronic components comprises the steps of: (a) exposing to a plasma a surface of a molded polymer formed on a substrate; (b) allowing the plasma to at least partially convert silicon-containing residue on the surface to silica; and (c) bonding an article to the surface by applying an adherent material between the article and the surface. Often, the silicon-containing residue is silicone oil, a mold release compound, which may prevent the formation of a bond when using conventional bonding methods and materials. The silica layer formed on the surface of the molded polymer assists in formation of a proper bond. The plasma may be an oxygen plasma and the adherent material may be selected from either a heat cured silicone-based paste adhesive with a metal oxide filler or a heat cured porous polymer film impregnated with adhesive. In particular, the film may be polytetrafluoroethylene, the adhesive may be polybutadine, and the film may be further impregnated with a metal oxide heat transfer medium, such as zinc oxide. An alternate method comprises applying the porous polymer film without plasma treatment and heat curing the film to form a proper bond.
    • 一种用于将散热器粘合到封装的电子部件的方法包括以下步骤:(a)将形成在基底上的模制聚合物的表面暴露于等离子体; (b)允许等离子体至少部分地将表面上的含硅残余物转化为二氧化硅; 和(c)通过在制品和表面之间施加粘附材料将制品粘合到表面上。 通常,含硅残渣是使用常规粘合方法和材料的硅油,脱模剂,可以防止形成粘结。 形成在模塑聚合物表面上的二氧化硅层有助于形成适当的键。 等离子体可以是氧等离子体,并且粘附材料可以选自具有金属氧化物填料的热固化硅氧烷基糊状粘合剂或浸渍有粘合剂的热固化多孔聚合物膜。 特别地,膜可以是聚四氟乙烯,粘合剂可以是聚丁二烯,并且该膜可以进一步用金属氧化物传热介质如氧化锌浸渍。 替代方法包括在不进行等离子体处理的情况下应用多孔聚合物膜并热固化膜以形成适当的键。