"Amorphous Silicon-Carbon-Fluorine Alloy Films" by R. Dutta, P. K. Banerjee et al.
 

Document Type

Article

Date of Original Version

1983

Department

Electrical Engineering

Abstract

A new amorphous semiconductor alloy system SixCxFy has been prepared by rf sputtering of polycrystalline SiC in an Ar+SiF4 atmosphere. Dark conductivity and optical absorption of thin films are measured as functions of F concentration. Infrared spectra indicate a preferential attachment of fluorine to carbon over silicon. The bonded fluorine concentration is estimated to be as high as 40 at. %. The principal reststrahlen band shifts to higher frequencies and appears to sharpen with the increase of fluorine concentration. Fluorinated films are observed to be resistant to high-temperature annealing.

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