In:
Acta Physica Sinica, Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences, Vol. 37, No. 11 ( 1988), p. 1794-
Abstract:
The piezoresistive properties of boron-doped PECVD microcrystalline Si films (μc-Si) deposited on SiO2 coated Si, covar or quartz substrates have been investigated. The relations between the gauge factor (G. F.) and doping concentrations as well as the film thickness etc, have been obtained experimentally. The maximum longitudinal G. F. of 25 and 20 are measured for Si and covar substrates respectively. An expression for calculating G. F. of p-type μc-Si is derived theoretically by using the spliring model of heavy and light hole band at k = 0 and the thermionic emission theory. The calculated dependences of G. F. on the doping concentrations, grain size and trap state density agree well with the experimental results, which offer a better understanding of the piezoresistive characteristics of μc-Si or poly-Si, and enable to optimize the design and fabrication of the μc-Si or poly-Si strain gauges.
Type of Medium:
Online Resource
ISSN:
1000-3290
,
1000-3290
Language:
Unknown
Publisher:
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Publication Date:
1988
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