Easily Reworkable Thermal Interface Material for Space Applications

ABSTRACT: In this program, the NanoTechLabs team will develop an easily-reworkable thermal interface material (TIM) that is highly thermally conductive, easy to handle, and highly compliant, yet can be qualified for aerospace and space missions. The enabling technology is the combination of a highly-compliant silicone-based pressure sensitive adhesive (PSA) in combination with trimodal micro-and nanoscale silver that allows the PSA to have a consistent and bond line, low contact resistance and low thermal resistance. Use of a PSA allows easy application of the TIM from a roll of material with a release film. It also reduces the time and damage associated with rework as the PSA can be removed via mechanical and/or solvent techniques. The PSA will be available in a tape that can be applied directly to the substrate for a highly controlled bond thickness. It will have an extremely long working time, but will be easily applied and reworked. NTL will test this material for thermal and mechanical properties as well as outgassing. BENEFIT: The benefits of this system include high thermal conductivity, easy application and it is readily reworked. Beyond space applications, this TIM will find applications as a thermal management material in military and commercial microelectronics as well as applications in medical devices.