Articles written in Pramana – Journal of Physics
Volume 16 Issue 1 January 1981 pp 17-38 Solid State Physics
Dutt and Spitzer experimentally observed the localised vibrational modes related to the phosphorus defects in CdTe andr eported that P would go either to substitutional or interstitial site. In this paper we have theoretically investigated the P defect behaviour in CdTe for those two possible sites by Green’s function technique and we believe from our calculations that P goes interstitially rather than substitutionally.
Volume 55 Issue 5-6 November 2000 pp 933-939 Plasma Processes, Contributed Papers
The promising applications of the microwave plasmas have been appearing in the fields of chemical processes and semiconductor manufacturing. Applications include surface deposition of all types including diamond/diamond like carbon (DLC) coatings, etching of semiconductors, promotion of organic reactions, etching of polymers to improve bonding of the other materials etc. With a 2.45 GHz. 700 W, microwave induced plasma chemical vapor deposition (CVD) system set up in our laboratory we have deposited diamond like carbon coatings. The microwave plasma generation was effected using a wave guide single mode applicator. We have deposited DLC coatings on the substrates like stainless steel, Cu-Be, Cu and Si. The deposited coatings have been characterized by FTIR, Raman spectroscopy and ellipsometric techniques. The results show that we have achieved depositing ∼95% sp3 bonded carbon in the films. The films are unform with golden yellow color. The films are found to be excellent insulators. The ellipsometric measurements of optical constant on silicon substrates indicate that the films are transparent above 900 nm.
Volume 94, 2020
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