Browse Prior Art Database

Feed Track for Chip Handler

IP.com Disclosure Number: IPCOM000077424D
Original Publication Date: 1972-Jul-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Degraff, G: AUTHOR [+4]

Abstract

Semiconductor chips are fed to a gravity feed handler from an orienting feed bowl or a spiral magazine. Vacuum is employed in the main feed track of the handler to control movement of the chips to an index head for testing and sorting.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 80% of the total text.

Page 1 of 2

Feed Track for Chip Handler

Semiconductor chips are fed to a gravity feed handler from an orienting feed bowl or a spiral magazine. Vacuum is employed in the main feed track of the handler to control movement of the chips to an index head for testing and sorting.

Chips are provided from a spiral magazine or feeder bowl 1 mounted to a vibratory feeder 2 through an adapter 3, to the main feed track 4 of the handler. Track 4 gravity feeds the chips to an unload station S communicating with an index head 6. Index head 6 is mounted on a stepping motor 7, having springs 8 carrying a Rulon valve assembly 9 interfacing with head 6. When a chip 10 reaches the bottom of track 4, it is sensed either fluidically or photoelectronically. The test cycle begins after the presence of the chip is verified. Vacuum is turned on in head 6 holding the chip and carrying it from the unload station.

Just before the chip is indexed out of station 5, vacuum is turned on in holes
17. Holding these three chips by holes 17, will support the weight of the column of chips above the chip that is being indexed out of station 5. Movement of the indexing head under the control of stepping motor 7 takes place by an indexer
11. The head 6 passes through a number of stations where it is aligned, tested and thereafter sorted and conveyed through a chute 12 to a second spiral magazine or a linear track 13, operating under the influence of vibratory feeder
14.

Feed track 4 is provided with a plurality of...