Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Presses or press platen structures – per se
Patent
1982-08-13
1984-02-14
Kimlin, Edward C.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Presses or press platen structures, per se
156580, 100 93P, 100295, 219243, B30B 502, B30B 1534, B23K 2700, B02C 1108
Patent
active
044314744
ABSTRACT:
A thermocompression bonding apparatus (10), which is particularly adapted to bond an array of miniaturized electrical leads (36) to a corresponding array of respectively aligned pads (33) of a metallized circuit, supported on a substrate (31), includes a specially constructed and internally heated bonding thermode (12) that is uniquely pin-coupled at an upper surface midpoint portion thereof to the lower end of a single support rod (54). The latter is resiliently supported at its upper end, preferably through the use of a plurality of coaxially mounted Belleville washers (77), within an oversized central bore of a three-plate support assembly (14). The latter is, in turn, adapted to be secured to a reciprocally driven member, such as a multipost-mounted platen (16), of the composite apparatus. The support assembly (14) includes an upper internally cooled metal plate (47), an intermediate insulative plate (49) and a lower metal plate (52), the latter formed with two downwardly extending and longitudinally spaced pairs of alignment brackets (126,127). The support rod (54), as thus resiliently mounted and pin-coupled to the thermode (12) continuously urges the latter (whether hot or cold) against downwardly projecting alignment ribs (52a) of the lower support plate (52) in a manner that advantageously allows the thermode to thermally expand in all directions while being heated to the requisite bonding temperature. This has been found to greatly minimize an otherwise tendency of the thermode bonding rail (12a), in particular, to acquire a detrimental non-linear profile, or bow, therealong when heated.
REFERENCES:
patent: 1437209 (1922-11-01), Wenderhold
patent: 3172798 (1965-03-01), Rosenbaum
patent: 3649809 (1972-03-01), Halstead
patent: 3743558 (1973-07-01), Ludwig
patent: 3916148 (1975-10-01), LaFleur
patent: 4284466 (1981-08-01), Chayka et al.
Gronek Fred J.
Taradejna Raymond M.
Watkins Ray A.
Bergum K. R.
Cashion Merrell C.
Julian H. St.
Kimlin Edward C.
Miller R. P.
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