Aluminum wire ball bonding apparatus and method

Details Aluminum wire ball bonding apparatus and method Aluminum wire ball bonding apparatus and method

1981-03-09

1983-06-14

Shaw, C. C.

Electric heating

Metal heating

Wire, rod, or bar bonding

219 561, 219137PS, 2191304, B23K 906

Patent

active

043885128

ABSTRACT:
A method and apparatus for forming a spherical shape on the end of an aluminum wire using a relatively low voltage across an arc gap to heat the end. Because the voltage is below the minimum sparking potential, a high voltage impulse is superimposed on the electrode to ionize the gas therebetween and initiate the arc. The gap may be in a protective environment such as an inert gas to prevent the formation of additional oxide. The wire may then be used in an aluminum ball bond.

REFERENCES:
patent: 2759088 (1956-08-01), Lincoln
patent: 3241218 (1966-03-01), Phillips
patent: 4123646 (1978-10-01), Keinanen
patent: 4323759 (1982-04-01), Edson et al.

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