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Browse Prior Art Database

Clamping Fixture

IP.com Disclosure Number: IPCOM000062674D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Marsh, EL: AUTHOR [+3]

Abstract

A clamping fixture is used to join a heatsink/cap assembly to a substrate with a spring-loaded screw that is designed to apply a consistent specified force (regardless of the substrate thickness) such that a seal band that resides between heatcap/assembly and substrate will hermetically seal when assembly passes through a cap-join furnace. The fixture works as follows. As seen in the drawing, the assembled fixture consists of a base 1 that accommodates a substrate 2 and a heatsink/cap 3 that fits on substrate 2. The substrate 2 is held in the proper X and Y orientation by locating tabs 4, front and back (back not seen) that have a slot 5 that positions substrate 2 by means of a tab on substrate (not seen). A locating pin 6 locates base 1 in the proper position on a cap-positioning tool 7.

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Clamping Fixture

A clamping fixture is used to join a heatsink/cap assembly to a substrate with a spring-loaded screw that is designed to apply a consistent specified force (regardless of the substrate thickness) such that a seal band that resides between heatcap/assembly and substrate will hermetically seal when assembly passes through a cap-join furnace. The fixture works as follows. As seen in the drawing, the assembled fixture consists of a base 1 that accommodates a substrate 2 and a heatsink/cap 3 that fits on substrate 2. The substrate 2 is held in the proper X and Y orientation by locating tabs 4, front and back (back not seen) that have a slot 5 that positions substrate 2 by means of a tab on substrate (not seen). A locating pin 6 locates base 1 in the proper position on a cap- positioning tool 7. Locating tabs 4 are also secured to cap-positioning tool 7. A holding band 8 holds heatsink/cap 3 and, in turn, substrate 2 on base 1 by means of screws 9 that attach to base 1 at threaded holes 10. When screws 9 are fully tightened, a seal band 11 is tightened to both substrate 2 and heatsink/cap 3. When the clamping fixture is processed through a furnace, the seal band 11 melts and springs 12 on screws 9 provide the compression to mate substrate 2 to heatsink/cap 3.

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