Microstructual study of the alternating current bias-enhanced nucleation and growth of diamond on (001) silicon wafers
- Department of Materials Science and Engineering, and Centre for Electronic Materials Research, Kwangju Institute of Science and Technology (K-JIST), Kwangju 506-712 (Korea)
- Division of Ceramics, Korea Institute of Science and Technology, Seoul 136-791 (Korea)
The bias-enhanced nucleation (BEN) and growth of diamond by microwave plasma chemical vapor deposition have been investigated using transmission electron microscopy (TEM), transmission electron diffraction (TED), atomic force microscopy (AFM), and scanning electron microscopy (SEM) full stop TED results show epitaxial relations between SiC and Si, and diamond and SiC, which depend on the BEN time. The formation of highly oriented (001) diamond films is obtained after 25 min BEN, in which the heteroepitaxially oriented {beta}-SiC and hence the heteroepitaxially oriented diamond crystallites play an important role. TEM reveals the {beta}-SiC crystallites 2{endash}10 nm in size and the diamond crystallites 5{endash}30 nm across. As the nucleation time increases, the density of the {beta}-SiC crystallites increases from {approximately}2.7{times}10{sup 11} to {approximately}1.6{times}10{sup 12} cm{sup {minus}2}, while that of the diamond crystallites varies from {approximately}2.0{times}10{sup 9} to {approximately}4.1{times}10{sup 10} cm{sup {minus}2}. Discrepancy between the densities obtained using TEM and AFM is discussed. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 529995
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 70; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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