Stress and piezoelectric properties of aluminum nitride thin films deposited onto metal electrodes by pulsed direct current reactive sputtering

Polycrystalline aluminum nitride thin films were deposited onto platinum, aluminum, and titanium electrodes by reactive magnetron sputtering in the pulsed direct current mode. The films exhibited all a columnar microstructure and a c-axis texture. The built-in stress and the piezoelectric properties of these films were studied as a function of both the processing conditions and the electrode material. Stress was found to be very much dependent on the growth conditions, and values ranging from strong compression to high tension were observed. The piezoelectric d(33,f) coefficient was shown to rely on substrate quality and ionic bombardment: The nucleation surface must be stable with regard to the nitrogen plasma and present a hexagonal symmetry and, on the other hand, enough energy must be delivered to the growing film through ionic bombardment. (C) 2001 American Institute of Physics.


Published in:
Journal of Applied Physics, 89, 11, 6389-6395
Year:
2001
ISSN:
0021-8979
Keywords:
Note:
Dubois, Ma Swiss Fed Inst Technol, EPFL, Dept Mat, Ceram Lab, CH-1015 Lausanne, Switzerland Swiss Fed Inst Technol, EPFL, Dept Mat, Ceram Lab, CH-1015 Lausanne, Switzerland
Part 1
440AC
Times Cited:24
Cited References Count:24
Other identifiers:
Laboratories:




 Record created 2006-08-21, last modified 2018-03-17


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