6.3.3. AlN thin film deposited on Au/Ti/Al2O3/Si
To provide an effective insulation, Al2O3 film of 300 nm thick was deposited on the Si wafer using Telemark e-beam dielectric evaporator. After the deposition, the complete sensor unit were fabricated using the same parameters as described earlier. Fig. 7(a)shows that the AlN thin film has no cracks when deposited at the Au-Al2O3 step edge. Fig. 7(b) shows that the top electrode deposition is conformal over the AlN surface. The electrical resistance