Metal fusion bonding – Process – With condition responsive – program – or timing control
Patent
1988-05-12
1989-04-04
Godici, Nicholas P.
Metal fusion bonding
Process
With condition responsive, program, or timing control
228105, 228 11, 228 45, 228 9, 219 8518, 219 5621, 219 5622, B23K 2010
Patent
active
048178489
ABSTRACT:
An automatic ultrasonic wire bonder employs a compliant motion servo (17, 119, 239, 200) on its Z axis drive to maintain a known, constant and steady force applied by the bonding tool (13) to the wire. The tool is resiliently mounted to a carriage (15) that is driven by a force control servo (17, 119, 238, 200). During bonding, the tool is pressed against the wire, and effects of variations in tool tip Z axis position caused by vibration, wire deformation during bonding and other factors of the equipment are minimized by a servo that precisely controls and maintains a fixed position of the carriage relative to the wire to thereby maintain a preselected force between the bonding tool tip and the wire.
REFERENCES:
patent: 4444349 (1984-04-01), Bilane et al.
patent: 4571688 (1986-02-01), Kashihara et al.
patent: 4597519 (1986-07-01), Kurtz et al.
patent: 4598853 (1986-07-01), Hill
patent: 4603802 (1986-08-01), Kurtz et al.
patent: 4718591 (1988-01-01), Hill
Godici Nicholas P.
Heinrich Samuel M.
Hughes Aircraft Company
Karambelas Anthony W.
Szabo Joseph E.
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