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Browse Prior Art Database

Alignment Fixture

IP.com Disclosure Number: IPCOM000047832D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Chirico, C: AUTHOR [+2]

Abstract

This fixture, consisting of a substrate with a glass portion, can be used to allow an operator to visually inspect chip placement on a substrate prior to actually performing the job in order to insure accurate and repeatable placement. In setting up a chip-placement tool in preparation for solder bonding semiconductor chips to a metallized pattern on the substrate, it is essential that the chips and substrate pattern be accurately aligned. The chip, when in place, obstructs the view of the operator making alignment a tedious and difficult operation. In this fixture a glass central portion 10 is supported by a suitable metal or plastic frame 12 that has the same dimensions as the substrate to which the chips are to be bonded.

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Alignment Fixture

This fixture, consisting of a substrate with a glass portion, can be used to allow an operator to visually inspect chip placement on a substrate prior to actually performing the job in order to insure accurate and repeatable placement. In setting up a chip-placement tool in preparation for solder bonding semiconductor chips to a metallized pattern on the substrate, it is essential that the chips and substrate pattern be accurately aligned. The chip, when in place, obstructs the view of the operator making alignment a tedious and difficult operation. In this fixture a glass central portion 10 is supported by a suitable metal or plastic frame 12 that has the same dimensions as the substrate to which the chips are to be bonded. A metallurgy pattern 14 is provided on the glass inserts 10 which pattern conforms identically to the pattern on the substrate to which the chip will be joined. As indicated in Fig. 2, the connection between the device 16 supported by probe 18 and the metallurgy pattern 14 on the glass insert 10 can be observed from the underside of the fixture which is made of a mirror 20. Any necessary adjustments between the probe 18 and the substrate support (not shown) can then be made and checked.

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