Metal fusion bonding – With control means responsive to sensed condition – Work-responsive
Patent
1988-08-09
1989-04-18
Godici, Nicholas P.
Metal fusion bonding
With control means responsive to sensed condition
Work-responsive
228111, 228179, 228230, 228 11, 228 45, 219 5621, 219 95, 219 1047, 219 1053, 219 8518, B23K 2010
Patent
active
048219444
ABSTRACT:
The method for bonding a wire of this invention comprises the steps of: positioning a metal ball or a wire on a material (to be bonded); applying a pressing force on the metal ball or the wire against the material (to be bonded) and deforming it; inducing eddy currents in the wire to generate heat energy, whereby elements of the wire and the material (to be bonded) are mutually diffused by means of the heat energy and the pressing force, and bonding is completed. The wire bonding apparatus of this invention comprises: a capillary tip having a through-hole which opens onto a end thereof and through which a wire is passed, the capillary tip pressing the wire against a material to be bonded by the end of the tip (flat face); an electromagnetic coil provided around the end of the capillary tip to surround the through-hole; and a power source for supplying a high-frequency current to the electromagnetic coil.
REFERENCES:
patent: 3497952 (1970-03-01), King et al.
patent: 3891822 (1975-06-01), Laub et al.
patent: 4315128 (1982-02-01), Matcovich et al.
patent: 4586642 (1986-05-01), Dreibelbis et al.
Godici Nicholas P.
Heinrich Samuel M.
Mitsubishi Denki & Kabushiki Kaisha
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