SILICON CARBIDE SINGLE CRYSTAL WAFER AND PRODUCING METHOD THEREOF
First Claim
1. A silicon carbide single crystal wafer wherein a substrate is cut out at an OFF angle from a (0001) c plane of an α
- -type silicon carbide single crystal of less than 2° and
in an OFF direction in which a deviation from a (11-20) direction is less than 10°
, the number of substantially triangular lamination defects exposed from a surface of a wafer which is epitaxial grown on the substrate is less than 4/cm2 over the entire surface of the wafer.
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Abstract
A silicon carbide single crystal wafer wherein a substrate is cut out at an OFF angle from a (0001) c plane of an α-type silicon carbide single crystal of less than 2° and in an OFF direction in which a deviation from a (11-20) direction is less than 10°, the number of substantially triangular lamination defects exposed from a surface of a wafer which is epitaxial grown on the substrate is less than 4/cm2 over the entire surface of the wafer. The invention provides a producing method of a silicon carbide single crystal wafer capable of enhancing the utility ratio of the bulk silicon carbide single crystal, the element characteristics and the cleavage, as well as a silicon carbide single crystal wafer obtained by such a producing method.
17 Citations
11 Claims
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1. A silicon carbide single crystal wafer wherein a substrate is cut out at an OFF angle from a (0001) c plane of an α
- -type silicon carbide single crystal of less than 2° and
in an OFF direction in which a deviation from a (11-20) direction is less than 10°
, the number of substantially triangular lamination defects exposed from a surface of a wafer which is epitaxial grown on the substrate is less than 4/cm2 over the entire surface of the wafer. - View Dependent Claims (2, 3, 4, 5)
- -type silicon carbide single crystal of less than 2° and
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6. A producing method of a silicon carbide single crystal wafer comprising:
- cutting out a wafer in an OFF direction in which at an OFF angle from a (0001) c plane of an α
-type silicon carbide single crystal is less than 2° and
a deviation from a (11-20) direction is less than 10°
,disposing the wafer in a reaction container, supplying silicon source gas and carbon source gas into the reaction container, and reacting the silicon source gas and the carbon source gas with each other and for epitaxially growing an α
-type (hexagonal) silicon carbide single crystal on the wafer. - View Dependent Claims (7, 8, 9, 10, 11)
- cutting out a wafer in an OFF direction in which at an OFF angle from a (0001) c plane of an α
Specification