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Cu ball, OSP-treated Cu ball, Cu core ball, solder joint, solder paste, foam solder, and manufacturing method of Cu ball
Cu ball, OSP-treated Cu ball, Cu core ball, solder joint, solder paste, foam solder, and manufacturing method of Cu ball
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机译:铜球,经OSP处理的铜球,铜芯球,焊点,焊锡膏,泡沫焊料及其制造方法
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摘要
Provided are Cu balls, OSP-treated Cu balls, Cu core balls, solder joints, solder pastes, and foam solders that realize high sphericity and low hardness and are also suppressed from discoloration. The electronic component 60 is configured by bonding the solder bumps 30 of the semiconductor chip 10 and the electrodes 41 of the printed board 40 with solder pastes 12 and 42. The solder bump 30 is formed by bonding the Cu ball 20 to the electrode 11 of the semiconductor chip 10. The Cu ball 20 has a purity of 99.995% by mass or more and 99.9995% by mass or less, and the total content of at least one of Fe, Ag, and Ni is 5.0 mass ppm or more and 50.0 mass ppm or less, and the S content is 1.0 mass ppm The content of P is less than 3.0 ppm by mass.
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