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Vibratory Bowl Orientation of Devices with Contacts Up

IP.com Disclosure Number: IPCOM000091347D
Original Publication Date: 1968-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Simms, F: AUTHOR

Abstract

This vibratory bowl presents semiconductor chips of the type having ball terminals with the ball terminals pointing upwardly. Vibratory bowl 10 has ramp 11 provided with grooves 12 adapted to receive the body of a semiconductor chip 13. Transverse small grooves 14 separate balls-down chips 15 from balls-up chips 16 by interacting with the terminal balls of chips 15 and diverting such chips from the grooves and returning them to bowl surface 17. Chips 15 pass unhindered over the transverse grooves to reach pickup station 18.

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Vibratory Bowl Orientation of Devices with Contacts Up

This vibratory bowl presents semiconductor chips of the type having ball terminals with the ball terminals pointing upwardly.

Vibratory bowl 10 has ramp 11 provided with grooves 12 adapted to receive the body of a semiconductor chip 13. Transverse small grooves 14 separate balls-down chips 15 from balls-up chips 16 by interacting with the terminal balls of chips 15 and diverting such chips from the grooves and returning them to bowl surface 17. Chips 15 pass unhindered over the transverse grooves to reach pickup station 18.

The apparatus is additionally provided with a plurality of knock-off devices to present the semiconductor chips with the conductor balls oriented in a given direction as well as with the conductor balls up. For example, knife-edge 19 or similar projection is positioned along ramp 11 and slightly above it. Chips 20 having their contact balls oriented in other than the preferred direction of chips 21 are pushed from ramp 11 by knife-edge 19. The latter is far enough above ramp 11 to allow chip body 13 to pass beneath it, but close enough to ramp 11 to interact with terminal balls 22 passing in front of it.

Additionally, when pickup station 18 is crowded with many chips, chips 23 may ride up on each other, or chips 24 can be pushed out of orientation. Cutout portions 25 and 26 operate to allow such misoriented chips to fall from ramp 11 just prior to arriving at pickup station 18.

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