Spreading-resistance temperature sensor on silicon-on-insulator

A spreading-resistance temperature (SRT) sensor is fabricated on silicon-on-insulator (SOI) substrate and achieves promising characteristics as compared with similar SRT sensor on bulk silicon wafers. Moreover, experimental results show that the maximum operating temperature of thin-film (1.2 μm) SOI SRT sensor can reach 450/spl deg/C, much higher than 350/spl deg/C of thick-film (10 μm) SOI SRT sensor under the same current level. With complete oxide isolation, this sensor structure can be potentially used in low power integrated sensors operating at temperatures as high as 450/spl deg/C.