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    • 11. 发明授权
    • Method of making chip size package substrate
    • 制造芯片尺寸封装基板的方法
    • US6153518A
    • 2000-11-28
    • US301533
    • 1999-04-28
    • Donald C. AbbottDavid W. West
    • Donald C. AbbottDavid W. West
    • H01L23/12H01L21/48H05K3/06H05K3/40H01L21/44
    • H05K3/4038H01L21/4853H01L21/486H05K2201/09563H05K2203/1189H05K3/06
    • A method of fabricating an electrically conductive via in a substrate which includes providing an electrically insulating substrate having first and second opposing surfaces and forming a first layer of electrically conductive material on the first of the opposing surfaces and forming a second layer of electrically conductive material on the second of the opposing surface. In accordance with one embodiment, the second layer has a thickness greater than the electrically insulating layer and no greater than the sum of the thicknesses of the electrically insulating layer and the first layer. In accordance with a second embodiment, the second layer has a thickness greater than the electrically insulating layer and no greater than the sum of the thicknesses of the electrically insulating layer and the first layer. A hole is formed in the first layer having sidewalls. A stud is formed in the second layer aligned with the hole in the first layer. The stud is forced through the substrate and into contact with the sidewalls of the hole. The stud preferably has a cross section to provide a friction fit with the sidewalls of the hole. In accordance with the second embodiment, the stud will extend beyond the bottom side of the polyimide layer to provide the effect of a ball from a ball grid array. The substrate can be heated to a thermoplastic state prior to forcing the stud through the substrate, if necessary. The substrate is preferably a polyimide and the electrically conductive material is preferably taken from the class consisting of copper and copper-based materials.
    • 一种在衬底中制造导电通孔的方法,其包括提供具有第一和第二相对表面的电绝缘衬底,并且在第一相对表面上形成第一导电材料层,并在第二层导电材料上形成第二层导电材料 对面的第二个表面。 根据一个实施例,第二层具有大于电绝缘层的厚度,不大于电绝缘层和第一层的厚度之和。 根据第二实施例,第二层的厚度大于电绝缘层,不大于电绝缘层和第一层的厚度之和。 在具有侧壁的第一层中形成有孔。 在与第一层中的孔对准的第二层中形成螺柱。 螺柱被迫穿过基板并与孔的侧壁接触。 螺柱优选地具有横截面以提供与孔的侧壁的摩擦配合。 根据第二实施例,螺柱将延伸超出聚酰亚胺层的底侧,以提供来自球栅阵列的球的作用。 如果需要,可以在将螺柱穿过基底之前将基底加热至热塑性状态。 基板优选为聚酰亚胺,导电材料优选为由铜和铜基材料构成的类型。
    • 13. 发明授权
    • Lead-free, nickel-free and cyanide-free plating finish for semiconductor
leadframes
    • 半导体引线框架的无铅,无镍和无氰镀层
    • US5935719A
    • 1999-08-10
    • US141856
    • 1998-08-28
    • Donald C. Abbott
    • Donald C. Abbott
    • B32B15/01
    • B32B15/018Y10T428/12868
    • A leadframe and method of fabrication of the leadframe. A leadframe is formed from one of copper or copper-based material and a coating of palladium is formed over the leadframe. Optionally, a layer of from about 10 to about 95 percent copper by weight and the remainder palladium is deposited between the leadframe and the coating of palladium. The coating of palladium is from about 3 to about 10 microinches and preferably about 3 microinches. The palladium/copper layer is from about 5 to about 40 microinches and preferably about 10 microinches. A semiconductor device is fabricated by providing a copper or copper-based lead frame and forming a layer of palladium over the leadframe. Optionally, a layer of palladium and copper is formed between the leadframe and the layer of palladium.
    • 引线框架和引线框架的制造方法。 引线框架由铜或铜基材料之一形成,并且在引线框架上形成钯涂层。 任选地,在引线框架和钯涂层之间沉积约10至约95重量%的铜和剩余的钯的层。 钯的涂层为约3至约10微英寸,优选约3微英寸。 钯/铜层为约5至约40微英寸,优选约10微英寸。 通过提供铜或铜基引线框架并在引线框架上形成钯层来制造半导体器件。 任选地,在引线框架和钯层之间形成一层钯和铜。