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Growth of silicon carbide crystals on a seed while pulling silicon crystals from a meltA saturated solution of silicon and an element such as carbon having a segregation coefficient less than unity is formed by placing a solid piece of carbon in a body of molten silicon having a temperature differential decreasing toward the surface. A silicon carbide seed crystal is disposed on a holder beneath the surface of the molten silicon. As a rod or ribbon of silicon is slowly pulled from the melt, a supersaturated solution of carbon in silicon is formed in the vicinity of the seed crystal. Excess carbon is emitted from the solution in the form of silicon carbide which crystallizes on the seed crystal held in the cool region of the melt.
Document ID
19790015627
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Ciszek, T. F.
(IBM Corp. Hopewell Junction, N. Y., United States)
Schwuttke, G. H.
(IBM Corp. Hopewell Junction, N. Y., United States)
Date Acquired
September 4, 2013
Publication Date
May 1, 1979
Subject Category
Solid-State Physics
Report/Patent Number
Patent Number: NASA-CASE-NPO-13969-1
Patent Number: US-PATENT-4,152,194
Patent Application Number: US-PATENT-APPL-SN-820499
Accession Number
79N23798
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-NPO-13969-1|US-PATENT-4,152,194
Patent Application
US-PATENT-APPL-SN-820499
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