Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1992-02-03
1993-04-27
Simmons, David A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156230, 156290, 156285, 156 736, 228245, 228246, 228 563, B23K 1700, B23K 2000
Patent
active
052058964
ABSTRACT:
Discrete solder preforms (28, 14a, 14b, 14c) are quickly and accurately placed on substrates (10) to be soldered by means of a foil sheet (24) apertured (26) with the pattern of preform placement. The foil sheet has a vacuum drawn through its apertures, and a number of discrete solder preforms are randomly projected from a vibratory membrane (38) up against the foil to be attached to the foil at each of its apertures. Then the foil sheet with its vacuum attached solder preforms (28, 14a, 14b, 14c) is moved into registration with the flux pattern (12a, 12b, 12c) pre-printed on the substrate (10), and all of the vacuum attached preforms are simultaneously positioned down upon the flux areas of the substrate where they remain when the vacuum is released. Planarity of the thin foil is maintained by a flat somewhat rigid but porous backing member (32) secured to the foil.
REFERENCES:
patent: 3355078 (1967-11-01), Smith
patent: 3516155 (1970-06-01), Smith
patent: 3899379 (1975-08-01), Wanesky
patent: 4209893 (1980-07-01), Dyce
patent: 4216350 (1980-08-01), Reid
patent: 4462534 (1984-07-01), Bitaillou
patent: 4774760 (1988-10-01), Seaman
patent: 4871110 (1989-10-01), Fukasawa
patent: 4898320 (1990-02-01), Dunaway
patent: 5118027 (1992-06-01), Braun
Brown Raymond L.
Smith Gerald B.
Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Rainwater Charles
Simmons David A.
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