Verfahren von Ternär-C4 Typ bei niedriger Temperatur
摘要
Flip chip bonding an IC chip to a carrier comprises depositing a high m.pt. compsn. on one set of contacts and a lower m.pt. compsn. on the facing contacts, and heating in contact to form a still lower m.pt. compsn. by the lower m.pt. compsn. dissolving the higher, and solder bonding with this alloy. Also claimed is a method as above in which Pb/Sn alloy is deposited on chip contacts, Bi/Sn alloy co-deposited on the carrier contacts, and the low m.pt. ternary Pb/Sn alloy forms the solder bond.
申请公布号
DE69503824(T2)
申请公布日期
1999.04.15
申请号
DE1995603824T
申请日期
1995.02.08
申请人
INTERNATIONAL BUSINESS MACHINES CORP., ARMONK, N.Y., US
发明人
GALL, THOMAS PATRICK, ENDWELL, NEW YORK 13760, US;INGRAHAM, ANTHONY PAUL, ENDICOTT, NEW YORK 13760, US