4 in Silicon Carbide 4H-SiC N-Type Ingot, Production Grade

Grade	Production Grade
Diameter	100.0 mm +/- 0.5 mm
Wafer Orientation	Off axis: 4.0 deg toward <11-20> +/-0.5 deg
Electrical Resistivity (Ohm-cm)	0.015~0.028
Primary Flat	{10-10} +/- 5.0 deg
Primary Flat Length	32.5 mm +/- 2.0 mm
Secondary Flat Length	18.0 mm +/- 2.0 mm
Secondary Flat Orientation	Silicon face: 90 deg CW from Primary flat +/- 5.0 deg
Cracks inspected by high intensity light	<1mm in radial
Hex Plates inspected by high intensity light*	Cumulative area 1 %
Polytype Areas inspected by high intensity light*	None
MicroPipe Density	<2cm^-2
Edge chipping	1 allowed, 1mm each
Note	The slicing wafer thickness <1mm, >80% (two ends not included) meet the above requirements

PROPERTIES OF SILICON CARBIDE CRYSTAL MATERIALS

Property	4H-SiC Single Crystal	6H-SiC Single Crystal
Lattice Parameters (Å)	a=3.076 c=10.053	a=3.073 c=15.117
Stacking Sequence	ABCB	ABCACB
Density	3.21	3.21
Mohs Hardness	~9.2	~9.2
Thermal Expansion Coefficient (CTE) (/K)	4-5 x 10^-6	4-5 x10^-6
Refraction Index @750nm	no = 2.61 ne = 2.66	no = 2.60 ne = 2.65
Dielectric Constant	c ~ 9.66	c ~ 9.66
Doping Type	N-type or Semi-insulating	N-type or Semi-insulating
Thermal Conductivity (W/cm-K @298K) (N-type, 0.02 ohm-cm)	a~4.2 c~3.7
Thermal Conductivity (W/cm-K @298K) (Semi-insulating type)	a~4.9 c~3.9	a~4.6 c~3.2
Band-gap (eV)	3.23	3.02
Break-Down Electrical Field (V/cm)	3-5 x 10⁶	3-5 x 10⁶
Saturation Drift Velocity (m/s)	2.0 x 10⁵	2.0 x 10⁵
Wafer and Substrate Sizes	Wafers: 2, 4, 6, 8 inch; smaller substrates: 10x10, 20x20 mm, other sizes are available and can be custom-made upon request

Price

MSE Supplies offers the best price on the market for high quality SiC wafers and SiC crystal substrates up to eight (8) inch diameter. Our price matching policy guarantees you the best price for the SiC crystal products with comparable specifications. CONTACT US today to get your quote.

Customization

Customized SiC crystal products can be made to meet customer's particular requirements and specifications. Epi-wafers can be custom made upon request.

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