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SUBLIMATION GROWTH OF LARGE SINGLE CRYSTALS OF BETA SILICON CARBIDE

Award Information

Agency:
Department of Defense
Branch:
Missile Defense Agency
Award ID:
8460
Program Year/Program:
1990 / SBIR
Agency Tracking Number:
8460
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
CREE RESEARCH, INC.
4600 Silicon Drive Durham, NC 27703
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1990
Title: SUBLIMATION GROWTH OF LARGE SINGLE CRYSTALS OF BETA SILICON CARBIDE
Agency / Branch: DOD / MDA
Contract: N/A
Award Amount: $490,000.00
 

Abstract:

BETA SILICON CARBIDE (B-SIC) POSSESSES A UNIQUE COMBINATION OF PROPERTIES IMPORTANT FOR APPLICATION IN HIGH FREQUENCY ELECTRONIC DEVICES CAPABLE OF OPERATING AT HIGH POWER. THE COMBINATION OF ITS WIDE BANDGAP, HIGH SATURATED ELECTRON DRIFT VELOCITY, HIGH BREAKDOWN ELECTRIC FIELD, LOW DIELECTRIC CONSTANT, AND HIGH THERMAL CONDUCTIVITYGIVE IT A FIGURE OF MERIT FOR HIGH POWER MICROWAVE APPLICATIONS THAT IS 1100 TIMES BETTER THAN THAT OF SILICON AND 183 TIMES BETTER THAN THAT OF GALLIUM-ARSENIDE. RECENT RESEARCH ON SIC HAS RESULTED IN THE FABRICATION OF VARIETY OF ELECTRONIC DEVICES FROM BOTH A ALPHAAND BETA-SIC. THE RECENT PRODUCTION OF LARGE 6H-SIC CRYSTALS AND THEIR USE AS SUBSTRATES FOR SUBSEQUENT CHEMICAL VAPOR DEPOSITION (CVD) HAS RESULTED IN A DRAMATIC DECREASE IN THE DEFECT DENSITY IN THE CVD GROWN 6H-SIC FILMS AND AN INCREASE IN DEVICE PERFORMANCE. CURRENTLY, THERE IS NO SOURCE OF B-SIC CRYSTALS LARGER THAN 2 MM IN DIAMETER. THE FEASIBILITY IS BEING INVESTIGATED OF GROWING LARGE SINGLE CRYSTALSOF B-SIC SUITABLE FOR USE AS SUBSTRATES FOR CVD GROWTH OF B-SIC THIN FILMS, USING A SUBLIMATION TECHNIQUE SIMILAR TO THAT DEVELOPED FOR GROWING LARGE 6H-SIC SINGLE CRYSTALS. WHEN SUCCESSFULLY DEMONSTRATED,PRODUCTION OF LARGE SINGLE CRYSTALS OF B-SIC WOULD MAKE POSSIBLE THE DEVELOPMENT OF SOLID STATE HIGH POWER MICROWAVE DEVICES FROM THIS MATERIAL.

Principal Investigator:

Dr Calvin H Carter Jr
9193611945

Business Contact:

Small Business Information at Submission:

Cree Research Inc.
2100 Westpark Dr Rsch Triangle Pk, NC 27713

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No