Abstract

Vanadium dioxide films were deposited using reactive RF-magnetron sputter deposition technique and characterized without or with post-annealing process for the application of thermal sensors. The film thickness variation on a 4-in wafer was less than ±2%. As-deposited film showing an abrupt metal–insulator transition (MIT) could be obtained with O 2 fraction of 6%. The films deposited at 400 and 450 °C showed abrupt changes of resistance in the order of 10 3 near typical MIT temperature of VO 2 without post-annealing. The 110-nm-thick VO 2 film deposited at 450 °C on c-sapphire revealed the resistance change of 1.2×10 4 near 68 °C after annealing at 510 °C.

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