WU Ting-ting, LIU Jing-quan, JIANG Shui-dong, et al. Research on electrical properties of NiCr thin film micro-heater in cryogenic environment[J]. 2014, 33(9): 38-41.
WU Ting-ting, LIU Jing-quan, JIANG Shui-dong, et al. Research on electrical properties of NiCr thin film micro-heater in cryogenic environment[J]. 2014, 33(9): 38-41. DOI: 10.13873/J.1000-9787(2014)09-0038-04.
A micro-heater used in cryogenic environment is designed. NiCr( 80 /20 at. %) thin film is deposited on SiO2/Si substrates by AC magnetron sputtering technique and patterned by micro processing technology as heating component. The electrical properties and crystalstructure of NiCr film is researched. Experiment shows that good performance NiCr heater can be obtained after annealed at 450 ℃ for 30 min in N2. The temperature coefficient of resistance( TCR) of heater is 80. 80 × 10- 6/K at 20 K. X-ray diffraction( XRD) analysis show crystallinity of the thin film becomes stronger after annealed at 450 ℃ in N2ambient
so annealing conditions have a significant effect on resistivity and TCR of thin film.
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