A high temperature nano/micro vapor phase conformal coating for electronics applications

Abstract

Through characterization of dielectric and other properties at high temperatures, this work describes the development of a high temperature and UV stable nano/micro vapor phase deposited polymer coating for providing electrical insulation and protection of various electronics from chemical corrosion and other harsh environmental effects. Packaging, protection and reliability of various electronic devices and components, including PCBs, MEMS, optoelectronic devices, fuel cell components and nanoelectronic parts, are becoming more challenging due to the long-term performance requirements on devices. A recently commercialized high temperature polymer, Parylene HT®, offers solutions to many existing protective, packaging and reliability issues of electronic and medical applications, in part because of its excellent electrical and mechanical properties, chemical inertness and long-term thermal stability (high temperature exposure to over 350°C, short-term at 450 °C). Experimental results and commercial applications demonstrate the ability of Parylene HT coating to meet the growing requirements for higher dielectric capabilities, higher temperature integrity and mechanical processing, etc. of dynamic electronics applications. In addition, Parylene HT polymer coating truly conforms to parts due to its molecular level deposition characteristics. Its suitability and biocompatibility encourage researchers to explore Parylene HT's role in sensors and in active electronic devices for various industries.