Metal working – Method of mechanical manufacture – Electrical device making
Patent
1981-08-10
1983-11-08
Hearn, Brian E.
Metal working
Method of mechanical manufacture
Electrical device making
29576S, 29591, 357 70, H01L 2192, H01L 2196, H01L 2198
Patent
active
044134045
ABSTRACT:
In an automatic assembly tape for semiconductor device assembly a continuous tape includes a plurality of sequential metal finger patterns. Each pattern includes a plurality of fingers that extend inwardly to form an array that mates with the bonding pads on a semiconductor device chip. The fingers are bonded to the chip pads so that the chip is then associated with the tape and therefore amenable to further assembly on high speed machines on a reel-to-reel tape handling basis. Each finger pattern includes an inner tear strip ring that initially holds the fingers together in a unitary structure. The fingers are joined to the ring via intermediate weakened regions. After the fingers are bonded to the chip pads, the ring is torn away so as to separate at the weakened regions. Prior to bonding, the fingers are held in precise location and in a common plane. This allows close spaced complex finger patterns and avoids bent fingers which can cause bond failure and possibly clogging of the auto assembly machines.
REFERENCES:
patent: 3529073 (1970-09-01), Leonard
patent: 3906621 (1975-09-01), Epple
patent: 4000842 (1977-01-01), Burns
patent: 4010005 (1977-03-01), Morisaki et al.
patent: 4012766 (1977-03-01), Phillips et al.
patent: 4331740 (1982-05-01), Burns
Hearn Brian E.
National Semiconductor Corporation
Pollock Michael J.
Schiavelli Alan E.
Winters Paul J.
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