Pyrolytic - Graphite Thermal Management
S-Bond Fabrication of TPG* Thermal Straps
“Active Solder Metallization of Thermal Pyrolytic Graphite (TPG) Materials”
Figure 1 Crystallinity illustrations of as-deposited PG showing turbostratic structure (a) and annealed TPG material with highly oriented graphene stacks (b), and electron microscope image of a cross section view of TPG material showing well aligned graphene stack (c). Test results. Actual results may vary.
In order to take advantage of its exceptional properties for thermal management, various forms of TPG-metal composite and encapsulated products have been developed by Momentive Performance Materials Inc. (“Momentive”). One of the TPG-based thermal management products is TMP-FX thermal strap, which consists of a TPG sheet sandwiched by very thin metal foils such as tin. In addition to high thermal conductivity and low weight, the thermal strap also presents low profile, flexibility, formability and solderability, which make it an excellent candidate for heat spreading in very tight space.
Figure 2 Comparison between TPG material and other commonly used thermal management materials: Left – IR images of thermal straps with 30 Watts power loading on the right side; Right – Thermal conductivity and density. Test data. Actual results may vary.
Figure 3 A TMP-FX thermal strap (tin metallized) with total thickness of 0.5 mm and bending radius of 25 mm
*TPG is a trademark of Momentive Performance Materials Inc.
Momentive and the Momentive logo are trademarks of Momentive Performance Materials Inc.
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