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Strip Process for Thermal Grease

IP.com Disclosure Number: IPCOM000041266D
Original Publication Date: 1984-Jan-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Ameen, JG: AUTHOR [+2]

Abstract

A process is disclosed for removing a silicone-oil-based thermal grease from integrated circuit module substrates or their caps. The process involves the use of a specially formulated wetting agent, such as SLIDE SILICONE REMOVER* which is aqueous, based and designed to replace organic solvents that may be harmful or which contribute to a plant pollution load. A typical stripping process is described below: A) Mix 10 parts of SLIDE SILICONE REMOVER concentrate with 90 parts of water. B) Place a beaker containing the solution of step A) in an ultrasonic unit, such as the SONICOR** bench top unit. C) Place the caps or substrates containing the thermal grease in the beaker, and treat ultrasonically for six minutes. D) Remove the parts, and rinse with water or rinse ultrasonically in clean water.

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Strip Process for Thermal Grease

A process is disclosed for removing a silicone-oil-based thermal grease from integrated circuit module substrates or their caps. The process involves the use of a specially formulated wetting agent, such as SLIDE SILICONE REMOVER* which is aqueous, based and designed to replace organic solvents that may be harmful or which contribute to a plant pollution load. A typical stripping process is described below: A) Mix 10 parts of SLIDE SILICONE REMOVER concentrate with 90 parts of water. B) Place a beaker containing the solution of step A) in an ultrasonic unit, such as the SONICOR** bench top unit. C) Place the caps or substrates containing the thermal grease in the beaker, and treat ultrasonically for six minutes. D) Remove the parts, and rinse with water or rinse ultrasonically in clean water. The cleaned caps or substrates exhibit a water-break-free surface. In addition, copper-coated surfaces treated with thermal grease and then stripped according to the above procedure were found to tin completely, indicating the grease (silicone oil) had been totally removed. The time required to remove the thermal grease may vary from 6-20 minutes and is a function of: 1) Solution concentration 2) Solution temperature 3) Solution agitation 4) Orientation of the part in the beaker The process has the advantage that several parts may be stripped in one bath without any redeposition of zinc oxide and special cleaning does not appear to be require...