Placement and bonding technique for optical elements

Details Placement and bonding technique for optical elements Placement and bonding technique for optical elements

1991-08-29

1993-03-16

Aftergut, Jeff H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156580, 385 14, 385 49, 385 50, 269 21, 269903, 294 641, 279 3, H01L 21603, H05K 1304, B25J 1506

Patent

active

051941058

ABSTRACT:
Apparatus (11) is robotically operated to pick up an optical element such as a ball lens (12) or an optical fiber, place it in a groove or depression (13) of a substrate (14), and apply pressure to it so that it is bonded to the substrate. The tool comprises a retracting element holder (17) surrounding a bonding tool (16). A vacuum channel (18) communicates with the element holder so that, by the application of a vacuum, it can pick up an optical element. The tool then moves the element to place it, for example, in a depression (13) of a substrate, whereupon the vacuum is released, thereby to allow the element to nest between opposing sidewalls of the depression. The retracting holder element is simultaneously retracted vertically upwardly so as to expose a bonding surface of the bonding tool. After the element has nested in the groove, the bonding tool contacts the element and forces it against opposite sidewalls to effect a thermo-compression bond of the optical element with the sidewalls.

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