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Status and Applications of Diamond and Diamond-Like Materials An Emerging Technology (1990) / Chapter Skim
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5 Research and Development Issues and Opportunities
Pages 91-96

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From page 91...
... Unless the United States invests efforts in developing innovative processes and new materials in this area, it faces the prospect of the field of superhard materials and their applications following the unfortunate precedents of the steel and semiconductor device industries. This would further exacerbate the nation's negative trade balance and create yet another import-dependent critical industry.
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From page 92...
... CVO Growth For the case of vapor-deposited diamond films, control of the deposition process requires understanding the chemistry of the diamond formation process. This in turn requires studies directed toward!
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From page 93...
... PVD Growth The PVD R&D issues such as deposition rate, throwing power, substrate thermal mismatch, deposition efficiency, and gas-phase chemistry studies related to epitaxy and formation of large-area single-crystal films and layered composites are similar to those discussed in the previous section. For PVD growth, the local or substrate-deposit interface temperature generally, should not exceed 500°C.
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From page 94...
... The nature of the bonding and arrangement of atoms in a solid determines its mechanical properties, and quantum-chemical calculations should be undertaken to shed light, in parallel with experiment, on the bonding in superhard materials. Theoretical results suggest that C-N bonds within an appropriate host crystal structure might yield harder materials than pure diamond.
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From page 95...
... 1988. Fast direct e-beam lithographic fabrication of first-order gratings for 1.3~m DFB lasers.
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Key Terms

  • deposition process
  • development issues
  • obtaining dopant
  • impurity atoms
  • vapor deposition

  • optoelectronic devices
  • distributed feedback
  • feedback lasers
  • magnetic disks
  • require control

  • parameters affect
  • growth processes
  • film morphology
  • thermal mismatch
  • diamond films

  • mechanical properties
  • throwing power
  • heat sinks
  • spa bonded
  • chemistry studies

  • nippon institute
  • activity concerned
  • silicon wafers
  • chemical purity
  • key research

  • distributed bragg
  • showa denko
  • shed light
  • crystal defects
  • cvo growth


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