Metal treatment – Stock
Reexamination Certificate
2006-11-07
2006-11-07
Ip, Sikyin (Department: 1742)
Metal treatment
Stock
C420S559000, C420S562000
Reexamination Certificate
active
07132020
ABSTRACT:
A solder which can form a soldered joint of good bonding strength on a Ni layer containing a small amount of P formed from electroless Ni plating with a P-containing plating solution comprises 60–64 mass % of Sn, 0.002–0.01 mass % of P, 0.04–0.3 mass % of Cu, and a remainder of Pb. The solder is particularly suitable for forming a solder bump on a Cu electrode which has been coated with Ni by electroless plating.
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Zequn Mei et al, “Brittle Interfacial Fracture of PBGA Packages Soldered on Electroless Nickel/Immersion Gold”, Electronic Components & Technology Conference, 1998, 48th IEEE Seattle, Wa. May 25-28, 1998, New York, IEEE, US May 25, 1998, pp. 952-961.
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Hori Takashi
Nozawa Iwao
Roppongi Takahiro
Soma Daisuke
Ip Sikyin
Senju Metal Industry Co. Ltd.
Tobias Michael
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