MRS Proc. 1998 DOI: 10.1557/proc-515-55 View full text
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Michael J. Sullivan

Abstract: ABSTRACTC-4 solder bump technology is used as an interconnect method between microelectronic chips and substrates because of four unique features; excellent electrical performance, large number of connections in area arrays, small size and superb reliability in properly fabricated terminals. C-4 terminals consist of chip metallization (BLM or UBM), solder, substrate metallization and underfill, if needed. The reliability of C-4 interconnections will be described in terms of the physical interfaces in the termi…

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