METHOD FOR SOLDERING ELECTRONIC COMPONENT AND SOLDERING STRUCTURE OF ELECTRONIC COMPONENT
    153.
    发明申请
    METHOD FOR SOLDERING ELECTRONIC COMPONENT AND SOLDERING STRUCTURE OF ELECTRONIC COMPONENT 审中-公开
    焊接电子元件的方法和电子元器件的焊接结构

    公开(公告)号:WO2007055410A1

    公开(公告)日:2007-05-18

    申请号:PCT/JP2006/322902

    申请日:2006-11-10

    Abstract: In soldering an electronic component, for the purpose of leading molten solder during re-flow, metallic powder (8) is mixed into flux employed so as to intervene between a bump and an electrode. The metallic powder (8) has a flake or dendrite shape including a core segment (8a) of the metal molten at a higher temperature than the liquid phase temperature of solder constituting a solder bump and a surface segment (8b) of the metal with good-wettability for the molten solder and to be solid-solved in the core segment (8a) molten. In the heating by the re-flow, the metallic powder remaining in the flux without being taken in a solder portion is molten and solidified to become substantially spherical metallic particles (18) . Thus, after the re-flow, the metallic powder does not remain in a flux residue in a state where migration is likely to occur, thereby combining both solder connectivity and insurance of insulation.

    Abstract translation: 在焊接电子部件时,为了在再流动期间引导熔融焊料的目的,将金属粉末(8)混合到所使用的焊剂中,以便介于凸块和电极之间。 金属粉末(8)具有片状或枝晶状,其包含在比构成焊料凸点的焊料的液相温度高的温度下熔融的金属的芯部(8a)和具有良好的金属的表面部分(8b)的金属粉末 - 熔融焊料的润湿性并固溶在芯部段(8a)中熔化。 在通过再流动的加热中,残留在助熔剂中而不被吸入焊料部分的金属粉末熔化并固化成变成基本上球形的金属颗粒(18)。 因此,在再流动之后,在易于发生迁移的状态下,金属粉末不会残留在助焊剂残留物中,从而结合了焊料连接性和绝缘保险。

    THERMALLY CONDUCTIVE ADHESIVE COMPOSITION AND PROCESS FOR DEVICE ATTACHMENT
    154.
    发明申请
    THERMALLY CONDUCTIVE ADHESIVE COMPOSITION AND PROCESS FOR DEVICE ATTACHMENT 审中-公开
    导电粘合剂组合物和装置附着工艺

    公开(公告)号:WO2004090942A9

    公开(公告)日:2006-07-20

    申请号:PCT/US2004009886

    申请日:2004-03-30

    Abstract: Thermally conductive, sinterable, adhesive compositions, free of fugitive solvents, that include a powder of a relatively high melting point metal or metal alloy, a powder of a relatively low melting point metal or metal alloy powder and a thermally curable adhesive flux composition that comprises (i) a polymerizable fluxing agent; (ii) an inerting agent to react with the fluxing agent at elevated temperature, rendering it inert. The fluxing agent preferably comprises a compound with formula RCOOH, wherein R comprises a moiety having one or more polymerizable carbon-carbon double bonds. Optionally, the inventive compositions also include (a) a diluent that is capable of polymerizing with the fluxing agent's polymerizable carbon-carbon double bonds; (b) free radical initiators; (c) a curable resin; and (d) crosslinking agents and accelerators. The compositions can be applied directly onto the surfaces of devices to be joined mechanically and/or electrically and are ideally suited for semiconductor die attachment. During heating, the fluxing agent promotes wetting of the high melting point powder by the molten low melting point powder, causing liquid phase sintering of the powders. The fluxing agent also promotes wetting of the metallizations on the die and substrate by the molten low melting point alloy, providing improved thermal conductivity. Simultaneously, the fluxing agent itself crosslinks to further mechanically bond the adherent surfaces. The absence of fugitive solvents creates a void-free bond.

    Abstract translation: 包含相对高熔点金属或金属合金的粉末,相对低熔点的金属或金属合金粉末的粉末以及可热固化的粘合剂助焊剂组合物的导热,可烧结,粘合剂组合物,不含挥发性溶剂,其包含 (i)可聚合助熔剂; (ii)惰性剂在升高的温度下与助熔剂反应,使其惰性。 助熔剂优选包含具有式RCOOH的化合物,其中R包含具有一个或多个可聚合碳 - 碳双键的部分。 任选地,本发明的组合物还包括(a)能够与助熔剂的可聚合碳 - 碳双键聚合的稀释剂; (b)自由基引发剂; (c)可固化树脂; 和(d)交联剂和促进剂。 组合物可以直接施加到机械和/或电连接的装置的表面上,并且理想地适用于半导体芯片附接。 在加热过程中,助熔剂通过熔融的低熔点粉末促进高熔点粉末的润湿,引起粉末的液相烧结。 助熔剂还通过熔融的低熔点合金促进模具和衬底上的金属化的润湿,提供改进的导热性。 同时,助熔剂本身交联以进一步机械地结合附着表面。 没有挥发性溶剂会产生无空隙的键。

    CONDUCTIVE VIAS AND ASSOCIATED METHODS AND STRUCTURES
    155.
    发明申请
    CONDUCTIVE VIAS AND ASSOCIATED METHODS AND STRUCTURES 审中-公开
    导电VIAS及相关方法和结构

    公开(公告)号:WO2005074335A1

    公开(公告)日:2005-08-11

    申请号:PCT/US2004/041925

    申请日:2004-12-10

    Abstract: Embodiments of the present invention are directed to methods and structures providing completely filled electrical interconnections, or vias, that are disposed through a surface land mounting area, or pad, on a dielectric substrate (104). A via (100) includes a first conducting layer (106) on the inner surface (102c) of a via hole. The via hole is filled with a thermally conductive material (110) with a desired viscosity and/or thixotropic ratio. The via fill material may be a metal powder in an epoxy matrix. The dielectric substrate may be used in rigid and/or flexible circuit components such as PWBs. High levels of surface land co-planarity, or surface flatness for pads on such substrates may be achieved by the use of conductive layers formed by immersion processes. Aspects of the invention may provide reduced amounts of lead (Pb) or eliminate lead altogether from a substrate.

    Abstract translation: 本发明的实施例涉及提供完全填充的电互连或通孔的方法和结构,其通过介电衬底(104)上的表面焊盘安装区域或焊盘设置。 通孔(100)包括在通孔的内表面(102c)上的第一导电层(106)。 通孔填充有具有所需粘度和/或触变比的导热材料(110)。 通孔填充材料可以是环氧基质中的金属粉末。 电介质基板可以用在诸如PWB之类的刚性和/或柔性电路部件中。 通过使用由浸渍工艺形成的导电层,可以实现高水平的表面焊盘共面性或这种衬底上焊盘的表面平坦度。 本发明的方面可以提供减少量的铅(Pb)或从基底中完全消除铅。

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