Resources Contact Us Home
Low defect density diamond single crystal and a process for the production of the same

Image Number 4 for United States Patent #5908503.

A colorless, transparent low defect density, synthetic type IIa diamond single crystal, in which the etch pits due to needle-shaped defects are at most 3.times.10.sup.5 pieces/cm.sup.2, and which can be applied to uses needing high crystallinity of diamond, for example, monochromators, semiconductor substrates, spectroscopic crystals in X-ray range, electronic materials, etc., is provided by a process for the production of the colorless, transparent low defect density, synthetic diamond single crystal by growing new diamond crystal on a seed crystal of diamond by the temperature gradient method which comprises using a crystal defect-free diamond single crystal, as a seed crystal of diamond, and optionally subjecting to a heat treatment in a non-oxidizing atmosphere at a low pressure and a temperature of 1100 to C.

  Recently Added Patents
Inflatable workshop
Liquid crystal display device
Listing recommendation using generation of a user-specific query in a network-based commerce system
Image scanner and image forming apparatus
Hydrating lounge chair
Converter and measuring apparatus
Cavernous nerve stimulation via unidirectional propagation of action potentials
  Randomly Featured Patents
Geographic data transmitting method, information delivering apparatus and information terminal
Apparatus for the continuous production of foam plastic blocks of rectangular cross-section
Decoders for feeding irregular loudspeaker arrays
Volume-selective magnetic resonance imaging method and device
Objective lens system for microscopes
Composition based on vegetal extracts of Ajuga reptans for preventing hair loss, stimulating the growth of hair, regulating the production of sebum
Aminooxy-containing linker compounds for formation of stably-linked conjugates and methods related thereto
Spiral scrambling
Leakage detecting method for use in oxidizing system of forming oxide layer
Method and apparatus for evaluation of fluid responsiveness