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    • 9. 发明授权
    • Soldering process
    • 焊接工艺
    • US5429293A
    • 1995-07-04
    • US358295
    • 1994-12-19
    • Edwin L. Bradley, IIIKingshuk BanerjiVahid Kazem-Goudarzi
    • Edwin L. Bradley, IIIKingshuk BanerjiVahid Kazem-Goudarzi
    • B23K35/02B23K35/26H05K3/12H05K3/34
    • H05K3/3463B23K35/025B23K35/26H05K3/3484B23K2201/04B23K2201/12H05K2201/035H05K2201/10992H05K2203/043H05K3/1216
    • A soldering process uses two or more different solder alloys. A first solder alloy (115) that undergoes a solid-to-liquid transition at a first temperature is coated (20) onto the solderable surfaces (105) of a printed circuit board (100). A solder paste (120) that undergoes this solid-to-liquid transition at a temperature greater than the first temperature is deposited on the coated solderable potions, and is heated to a temperature that is above the first temperature but below the second temperature. During this time, the first solder alloy liquifies, while the solder paste does not. The first solder alloy wets to the individual particles in the solder paste, and alloys to the solderable surfaces and the solder particles in the solder paste. The soldering composition is subsequently cooled (40) to solidify the first solder material, forming a solid and substantially planar coating on the solderable potions of the printed circuit board.
    • 焊接工艺使用两种或更多种不同的焊料合金。 在第一温度下经历固 - 液过渡的第一焊料合金(115)涂覆(20)到印刷电路板(100)的可焊接表面(105)上。 在大于第一温度的温度下经历该固 - 液过渡的焊膏(120)沉积在涂覆的可焊接部分上,并被加热到高于第一温度但低于第二温度的温度。 在此期间,第一焊料合金液化,而锡膏不发生。 第一焊料合金润湿焊锡膏中的各个颗粒,并将其焊接到可焊接表面和焊膏中的焊料颗粒。 焊接组合物随后被冷却(40)以固化第一焊料材料,在印刷电路板的可焊接部分上形成固体和基本上平面的涂层。