Browse Prior Art Database

Restricted Space, Chip Handling Apparatus

IP.com Disclosure Number: IPCOM000084619D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Marks, RE: AUTHOR [+2]

Abstract

In circumstances where it is difficult to place semiconductor chips onto, for example, a substrate, or other holder because of space and physical restriction requirements, it is mandatory that a limited motion device be employed for lifting up and/or depositing the semiconductors chip into its desired location.

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Restricted Space, Chip Handling Apparatus

In circumstances where it is difficult to place semiconductor chips onto, for example, a substrate, or other holder because of space and physical restriction requirements, it is mandatory that a limited motion device be employed for lifting up and/or depositing the semiconductors chip into its desired location.

One such device is illustrated wherein a mounting extension 10 capable, for example, of limited axial motion, is coupled to a U-shaped channel 11 by screws 12 and 13. The screws also connect a pair of cantilever springs 14 and 15 to the channel 11 to permit upward and downward deflection of the cantilever springs about the pivot screw 12.

In order to effect such deflection in a downward direction, the channel 11 includes an aperture 16 which is connected to an air pressure line 17, the aperture 16 terminating in an outlet 16A which confronts the lower cantilever spring 14. Upon application of air pressure to the hose 17, the lower spring 14 is forced downwardly by the air pressure while an adjustable screw 18 limits the downward deflection of the springs.

By utilizing a loose coupling (nonair tight) between the channel 11 and the lower cantilever spring 14, leakage occurs around the spring and the channel, effectively damping the lowering movement of the springs, and thereby prevents bounce of the vacuum pencil tip 19 associated with the extended end 20 of the apparatus. As illustrated, the vacuum pencil 19 is conn...