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    • 95. 发明申请
    • ソルダペースト
    • 焊膏
    • WO2007125861A1
    • 2007-11-08
    • PCT/JP2007/058728
    • 2007-04-23
    • 千住金属工業株式会社加藤 力弥山形 咲枝
    • 加藤 力弥山形 咲枝
    • B23K35/26
    • H05K3/3484B22F1/0003B22F1/0059B22F1/025B23K35/0244B23K35/26B23K35/262C22C5/00C22C9/02C22C9/06C22C13/00C22C13/02H05K2201/0215H05K2201/0218Y10T428/12028Y10T428/12181Y10T428/2982
    • High-temperature solders having a melting temperature higher than that of a solder alloy used for soldering of a printed board are used for internal bonding of electronic components. A high-temperature solder not including Pb, however, has not been developed. Though there is a high-temperature solder, which has a Sn ball and a Cu ball and is not melted to a single composition but bonds by an intermetallic compound, such high-temperature solder does not have good wettability to the lands of the printed substrates and the electrodes of the electronic components and has not been used. A solder paste is provided by mixing flux with a mixed powder wherein an Sn powder or a powder of a lead-free Sn group solder and a Cu or Ag powder plated with Ni on the surface are mixed. Though the solder paste is not melted to a single composition but bonds by an intermetallic compound, the Ni plating operates as a barrier for suppressing generation of the intermetallic compound and ensures a time for permitting the land of the printed board and the electrode of the electronic compound to be wetted.
    • 熔化温度高于用于焊接印刷电路板的焊料合金的熔化温度的高温焊料用于电子部件的内部粘接。 然而,不包括Pb的高温焊料尚未开发。 尽管存在具有Sn球和Cu球的高温焊料,并且不熔融成单一组合物而是被金属间化合物键合,但是这种高温焊料对印刷基板的焊盘不具有良好的润湿性 和电子部件的电极,未被使用。 通过将助熔剂与混合粉末混合来提供焊膏,其中Sn粉末或无铅Sn组焊料的粉末和表面上镀有Ni的Cu或Ag粉末混合。 尽管焊膏不熔化成单一组合物而是被金属间化合物键合,但是Ni镀层作为阻止金属间化合物的产生的屏障起作用,并且确保了允许印刷电路板和电极的电极的时间 化合物要润湿。