MH&W International now provides U 90 silicone-free thermal interface materials (TIMs) with a new light tack adhesive to provide high thermal conductivity where contamination threats prevent the use of silicone-based thermal pads, and allow their easy positioning between components and heat sinks.
MH&W’s Keratherm U 90 thermal interface material is a ceramic-filled polyurethane film with a thermal conductivity of 6.0 W/mK and thermal impedance of 0.05 Kin2/W. A lower cost version, Keratherm U 80, also silicone-free, provides 1.8 W/mK of thermal conductivity and 0.11 Kin2/W of thermal impedance.
Both TIMs are available with a light tack adhesive to keep them in place during assembly or pre-attached to heat sinks. The light tack adhesive can be compared with adhesives used on repositionable notes. The TIM pads won’t be damaged when removed from mounting surfaces, which is a common problem when stronger adhesives are used.
Typical applications for Keratherm U 90 and U 80 silicone-free TIMs include medical devices, laser equipment, LED lighting, solar energy, disk drives and automotive electronics.
The U 90 TIM with adhesive is available in thicknesses of 0.125, 0.225 and 0.325 mm; U 80 is 0.175 and 0.325 mm thick. Both TIMs are available on roll stock or custom shaped pads. Pricing for U 90 thermal interface pads starts at $0.16 for 1 inch square,
0.175 mm thick pads in high volume quantities, and U 80 at 0.175 mm starts at $0.08.
More information on Keratherm U 90 and U 80 thermal interface pads, developed by Kerafol, can be found at www.mhw-thermal.com or by calling 1-201-891-8800 x 517 for samples and price quotes.