Liquid thermal interface having mixture of linearly structured polymer doped crosslinked networks and related method

US7808099B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Randall J. Bertrand · South Burlington, US
• Mark S. Chace · Beacon, US
• David L. Gardell · Saint Albans, US
• George J. Lawson · Barre, US
• Yvonne Morris · Fresno, US
• Charles L. Reynolds · Red Hook, US
• Jiali Wu · Yorktown Heights, US

Key dates

• Filing date: May 6, 2008
• Grant date: Oct 5, 2010
• Expiry date: Sep 19, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A liquid thermal interface (LTI) including a mixture of a linearly structured polymer doped with crosslinked networks and related method are presented. The LTI exhibits reduced liquid polymer macromolecule mobility, and thus increased surface tension. An embodiment of the method includes mixing a crosslinker with a linearly structured polymer to form a mixture, wherein the crosslinker includes a base agent including a vinyl-terminated or branched polydimethylsiloxane, and a curing agent including a hydrogen-terminated polydimethylsiloxane; and curing the mixture. The crosslinker functions as cages to block linear or branched linear macromolecules and prevents them from sliding into each other, thus increasing surface tension of the resulting LTI.