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The multi-material MEMS fabrication process often requires a larger number of masks making it more expensive as compared to single-material MEMS (SMM) technology. By varying the doping level in poly-C, semi-conducting, metallic and insulating (undoped) properties are achieved that are needed for poly-C SMM. However, the development of diamond-based SMM technology faces a number of challenges including (a) producing highly-insulating and highly-conducting poly-C films, (b) creating ohmic contacts and (c) patterning by dry etching of poly-C films grown on Si or SiO2. These challenges are addressed in this paper.
Date of Conference: 24-28 Jan. 2010