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Semiconductor Chip Centering Device

IP.com Disclosure Number: IPCOM000075323D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 64K

Publishing Venue

IBM

Related People

Clark, K: AUTHOR

Abstract

The chip centering device shown is formed within the main body block 1 having a vertically extending bore 2 intersecting a horizontally milled slot 3. Secured within bore 2 by a set screw 5 is a hollow support shaft 4 having its upper end slotted at 6 to accommodate a pair of actuating levers 7. The actuating levers 7 are pivotably mounted on the main body 1 by eccentric pivots 8 for preliminary adjustment of a pair of jaw blades 9 provided with mounting apertures 10 to receive the upstanding end portions of levers 7. The adjustments of lever pivots 7 is maintained by set screws 11. Secured on the top of main body 1 is a cover plate 12 having a suitable opening 13 for receiving semiconductor chips between centering slots 14 of jaw blades 9.

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Semiconductor Chip Centering Device

The chip centering device shown is formed within the main body block 1 having a vertically extending bore 2 intersecting a horizontally milled slot 3. Secured within bore 2 by a set screw 5 is a hollow support shaft 4 having its upper end slotted at 6 to accommodate a pair of actuating levers 7. The actuating levers 7 are pivotably mounted on the main body 1 by eccentric pivots 8 for preliminary adjustment of a pair of jaw blades 9 provided with mounting apertures 10 to receive the upstanding end portions of levers 7. The adjustments of lever pivots 7 is maintained by set screws 11. Secured on the top of main body 1 is a cover plate 12 having a suitable opening 13 for receiving semiconductor chips between centering slots 14 of jaw blades 9.

The jaw blades 9 are actuated by a drive pin 15 engaged within lever slots 16 in jaw blades 7, with the drive pin 15 mounted within a vertically reciprocal center shaft 17 downwardly biased by a return spring 18. Vertical reciprocation of center shaft 17 is effected by a bell crank 20 activated by energization and de- energization of a solenoid 19.

In operation, the jaw blades are opened by energization of solenoid 19 which drives center shaft 17 upwardly. This action moves the drive pin upwardly within slots 16 of levers 7 which are rotated outwardly to move the jaw blades 9 for accommodation of a semiconductor chip 30 inserted into opening 13 by a vacuum needle chuck 21.

The axis of the vacuum needle chuck 21 is accurately a...