Metal working – Method of mechanical manufacture – Electrical device making
Patent
1979-05-24
1981-08-18
Combs, Ervin M.
Metal working
Method of mechanical manufacture
Electrical device making
29741, 29742, 29744, H05K 330, B23P 1900
Patent
active
042838479
ABSTRACT:
An apparatus and method for assembling integrated circuits to a printed circuit board wherein integrated circuits with protective carriers are selectively dispensed from a rotary magazine, are removed from the carriers and positioned by the leads on magnetic holders on a continuous conveyor which moves the integrated circuits, thus mounted on the holders, to a lead-forming and trim assembly wherein the leads are bent downwardly and outwardly to form feet and trimmed. Thereafter the integrated circuits are moved, thus mounted on the holders, to a flux-applying assembly wherein flux is applied to the lead feet, then to a solder-applying assembly wherein solder is applied to the lead feet, and then to a program activated X-Y axis table which mounts the printed circuit board. The integrated circuits, with tinned leads, are transferred through magnetic fingers to the printed circuit board wherein electrodes solder the leads to pads on the Board. The leads are bent in a special configuration comprising four bends which assist in positioning the leads on the magnetic holder and enhances the vibrational stress resistance of the integrated circuits on the assembled printed circuit board. Special universal tooling is magnetically held on the X-Y axis table to mount the printed circuit boards in precise location on the table. The entire operation from dispensing to soldering is computer controlled.
REFERENCES:
patent: 3092237 (1963-06-01), Miller
patent: 3465408 (1969-09-01), Clark et al.
patent: 3492713 (1970-02-01), White
patent: 3564691 (1971-02-01), Ackerman
patent: 3629543 (1971-12-01), Mayhew
patent: 3692168 (1972-09-01), Hughes, Jr. et al.
patent: 3727284 (1973-04-01), Ragard et al.
patent: 3760484 (1973-09-01), Kowalski
patent: 3793710 (1974-02-01), Monahan et al.
patent: 3796201 (1974-03-01), Golub
patent: 3917054 (1975-11-01), Hurst
patent: 3973322 (1976-08-01), Boynton
patent: 4063347 (1977-12-01), Woodman, Jr.
Arbes C. J.
Combs Ervin M.
Gaffin Richard A.
Lear Siegler, Inc.
McGarry John E.
LandOfFree
Circuit board assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit board assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit board assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-31398