Vision system apparatus and method for component/pad alignment

Details Vision system apparatus and method for component/pad alignment Vision system apparatus and method for component/pad alignment

1990-04-13

1991-09-03

Arbes, Carl J.

Metal working

Method of mechanical manufacture

Electrical device making

29759, 29833, 228 45, 250225, 356400, H05K 330

Patent

active

050440721

ABSTRACT:
An improved method and apparatus for the visual alignment and placement of electrical components, such as lead-carrying chip members, and pad members, such as pad-carrying printed circuit boards, for purposes of aligning, placing and soldering said leads to said pads. The method involves supporting the chip member vertically over said pad member, inteposing therebetween a beam splitter cube which provides a simultaneous view of the underside of the chip member and the surface of the pad when viewed through a stereo microscope means, interposing an adjustable polarizing filter means which permits the operator to adjust the visual contrast between the leads and the pads, thereby facilitating the proper X, Y and theta vertical alignment, and moving the component down onto the pad member for soldering thereto.

REFERENCES:
patent: 3581375 (1971-06-01), Rottmann
patent: 4286201 (1981-08-01), Roecks et al.
patent: 4628464 (1986-12-01), McConnell
patent: 4671446 (1987-06-01), Sherman
patent: 4793707 (1988-12-01), Hata et al.
patent: 4813588 (1989-03-01), Srivastava et al.
patent: 4867569 (1989-09-01), Mohara
patent: 4937459 (1990-06-01), Ina
IBM Tech. Discl Bull., vol. 25, No. 5, Oct. 1982, pp. 2301-2303 by Gaston.

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