MAHWAY, N.J., Aug. 24, 2010 — MH&W International now offers 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 to facilitate their positioning between components and heat sinks. Developed by Kerafol, the 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 the 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 are available on roll stock or custom-shaped pads.