A method of manufacturing high temperature thermistors. A polycrystalline thermistor body is formed from a material selected from a list consisting of bulk polycrystalline Si with intrinsic conductivity and bulk polycrystalline Ge with intrinsic conductivity. At least one ohmic contact is formed on at...http://www.google.se/patents/US7432123?utm_source=gb-gplus-sharePatent US7432123 - Methods of manufacturing high temperature thermistors