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    • 4. 发明申请
    • MODIFIED SOLDER ALLOYS FOR ELECTRICAL INTERCONNECTS, METHODS OF PRODUCTION AND USES THEREOF
    • 用于电气互连的改性焊接合金,其生产方法及其用途
    • WO2008033828A8
    • 2008-06-26
    • PCT/US2007078146
    • 2007-09-11
    • HONEYWELL INT INCWEISER MARTINLI JIANXING
    • WEISER MARTINLI JIANXING
    • B23K35/26C22C12/00
    • C22C12/00B23K35/26B23K35/264H01L24/29H01L2224/32225H01L2924/01322H01L2924/1301H01L2924/1305H01L2924/1306H01L2924/14Y10T428/31678H01L2924/00
    • Lead-free solder compositions having a thermal conductivity are disclosed that include at least about 2% of silver, at least about 60% of bismuth, and at least one additional metal in an amount that will increase the thermal conductivity of the solder composition over a comparison solder composition consisting of silver and bismuth, wherein the at least one additional metal does not significantly modify the solidus temperature and does not shift the liquidus temperature outside of an acceptable liquidus temperature range. Methods of producing these lead-free solder compositions are also disclosed that include providing at least about 2% of silver, providing at least about 60% of bismuth, providing at least one additional metal in an amount that will increase the thermal conductivity of the solder composition over a comparison solder composition consisting of silver and bismuth, blending the bismuth with the at least one additional metal to form a bismuth-metal blend, and blending the bismuth-metal blend with copper to form the solder composition, wherein the at least one additional metal does not significantly modify the solidus temperature and does not shift the liquidus temperature outside of an acceptable liquidus temperature range. Additional methods of producing a lead-free solder composition having a thermal conductivity include providing at least about 2% of silver, providing at least about 60% of bismuth, providing at least one additional metal in an amount that will increase the thermal conductivity of the solder composition over a comparison solder composition consisting of silver and bismuth, blending the silver with the at least one additional metal to form a silver-metal alloy, and blending the silver-metal alloy with bismuth to form the solder composition, wherein the at least one additional metal does not significantly modify the solidus temperature and does not shift the liquidus temperature outside of an acceptable liquidus temperature range.
    • 公开了具有导热性的无铅焊料组合物,其包含至少约2%的银,至少约60%的铋以及至少一种额外的金属,其量将增加焊料组合物的热导率 由银和铋组成的比较焊料组合物,其中所述至少一种附加金属不会显着地改变固相线温度,并且不将液相线温度移动到可接受的液相线温度范围之外。 还公开了生产这些无铅焊料组合物的方法,其包括提供至少约2%的银,提供至少约60%的铋,提供至少一种额外的金属,其量将增加焊料的热导率 通过比较由银和铋组成的焊料组合物,将铋与至少一种另外的金属共混以形成铋 - 金属共混物,并将铋 - 金属共混物与铜混合以形成焊料组合物,其中至少一种 附加金属不会显着地改变固相线温度,并且不将液相线温度移动到可接受的液相线温度范围之外。 制备具有导热性的无铅焊料组合物的附加方法包括提供至少约2%的银,提供至少约60%的铋,提供至少一种额外的金属,其量将增加该导电性的导热性 焊料组合超过由银和铋组成的比较焊料组合物,将银与至少一种另外的金属共混以形成银 - 金属合金,并将银 - 金属合金与铋共混以形成焊料组合物,其中至少 一种额外的金属不会显着改变固相线温度,并且不会将液相线温度移动到可接受的液相线温度范围之外。