Electric heating – Metal heating – By arc
Patent
1980-06-06
1982-07-27
Albritton, C. L.
Electric heating
Metal heating
By arc
219121LC, 219121LF, 219121LL, B23K 2700
Patent
active
043419429
ABSTRACT:
A wire is positioned in intimate contact with a microcircuit chip above a conductor line or pad on the chip. The line is protected by a layer of passivating or insulating material deposited upon the chip. A short pulse, focussed, energy source such as a laser beam drills a hole through or on the edge of the wire, and also opens a hole drawn through the insulating material to expose the conductor line. Then energy is directed upon the portion of the wire surrounding the hole to melt metal from the wire down into the hole which coalesces with molten metal below to form an electrical and mechanical bond of the wire to the line.
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Cook et al., "Chip Personalization by Short Laser Pulses", IBM Tech. Disc. Bull., vol. 17, No. 1, Jun., 1974, p. 242.
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Chaudhari Praveen
Kiessling John B.
Perlman David J.
Tynan Eugene E.
von Gutfeld Robert J.
Albritton C. L.
International Business Machines - Corporation
Yee Yen S.
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