Abstract
Transmission electron microscope examinations of silicon single crystals, phosphorus-diffused at low temperatures from anodic oxide films as phosphorus sources, showed the presence of crystallographically oriented precipitate. X-ray and electron diffraction investigations of SiP and SiAs single crystals prepared by a vapor-growth method revealed the orthorhombic crystal structure of the as-grown compounds. Using these structure data, the precipitate in the diffused silicon could be identified by electron diffraction as SiP. The orientation relationship SiP-precipitate/Si-matrix was determined.

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