Bonding a workpiece to a body

Details Bonding a workpiece to a body Bonding a workpiece to a body

1982-11-01

1984-11-27

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 85CM, 219 85D, B23K 112

Patent

active

044852908

ABSTRACT:
A workpiece such as a miniature stud (10) supports a chip (20) having a heat and light sensitive device therein. Such stud (10) is thermally bonded to an insulative body (12) to form a guide (14) for converting light to electrical pulses. A positive and a negative electrode (44 and 45), respectively, are each connected to a respective pole of a power supply for providing electrical current adequate for the bonding. A resistance heating element (42) conducts the current from electrode (44) at least partially along a path through the stud (10) to electrode (45). For stud (10), the path is selected preferably by providing a thru hole (90) in element (42) under the position occupied by the heat sensitive device when stud (10) is placed upon the element (42). The current concentrates in stud (10) along an annular ring (29) where heating is required sufficiently to thermally bond at least the ring (29) of the stud (10) to the body (12).

REFERENCES:
patent: 2757324 (1956-07-01), Pearson
patent: 4220966 (1980-09-01), Montone
patent: 4233520 (1980-11-01), Canfield
patent: 4255644 (1981-03-01), Delorme
patent: 4289374 (1981-09-01), Franken et al.
patent: 4296998 (1981-10-01), Dufft
patent: 4343643 (1982-08-01), Miller

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