A study of high-quality freestanding diamond films grown by MPCVD
Abstract
The fabrication process of high-quality freestanding diamond films grown by Microwave Plasma Chemical Vapor Deposition (MPCVD) was studied. Under the optimal condition, freestanding diamond films 55 mm in diameter with a thickness up to 1 mm were fabricated, showing an excellent crystalline structure as examined from Raman and X-Ray Diffraction (XRD) spectra. For most processing conditions, including substrate temperatures varied from 800 to 1050 °C, the films were found in a [1 1 1] preferential texture, whereas [2 2 0] and [0 0 1] film textures occurred in some special cases. Optical measurements of one side polished diamond films showed a cutoff wavelength 225 nm, and a transmission ≥70% at λ ≥ 2.5 μm.
- Publication:
-
Applied Surface Science
- Pub Date:
- June 2012
- DOI:
- 10.1016/j.apsusc.2012.02.025
- Bibcode:
- 2012ApSS..258.5987D