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Growth of diamond particles in chemical vapor deposition

Published online by Cambridge University Press:  31 January 2011

Sumio Iijima ,
Yumi Aikawa  and
Kazuhiro Baba
Sumio Iijima
Affiliation:
Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305, Japan
Yumi Aikawa
Affiliation:
Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305, Japan
Kazuhiro Baba
Affiliation:
Fundamental Research Laboratories, NEC Corporation, 34, Miyukigaoka, Tsukuba 305, Japan
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Abstract

An early stage of diamond growth in hot-filament chemical vapor deposition on silicon substrates was examined by the high resolution electron microscope. “Pretreatment” of the substrate surfaces by diamond powder abrading was found to plant diamond seed crystals with a density of as high as 1011/cm2. These crystals provide sites for subsequent growth of diamond films. The CVD grown diamond particles tend to be cuboctahedra. Smaller particles in nanometer size are faultless, but larger ones of several tens of nanometers develop crystal faults. Some of them may originate from the seed crystals. Degradation of the diamond seed crystals due to the electron beam irradiation is discussed in terms of fabrication of diamond film.

Type
Articles
Information
Journal of Materials Research , Volume 6 , Issue 7 , July 1991 , pp. 1491 - 1497
Copyright
Copyright © Materials Research Society 1991

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References

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