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TEMPERATURE MEASUREMENT BY NONCONTACT METHOD FOR CZOCHRALSKITYPE CRYSTAL GROWTH

Award Information

Agency:
National Aeronautics and Space Administration
Branch:
N/A
Award ID:
8181
Program Year/Program:
1988 / SBIR
Agency Tracking Number:
8181
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Electro Design Manufacturing
Po Box 2569 Highway 31 South Decatur, AL 35602
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1988
Title: TEMPERATURE MEASUREMENT BY NONCONTACT METHOD FOR CZOCHRALSKITYPE CRYSTAL GROWTH
Agency: NASA
Contract: N/A
Award Amount: $49,000.00
 

Abstract:

IN THE GROWTH OF CRYSTALS FROM MELTING MATERIALS USING THE CZOCHRALSKI METHOD, A GOOD TECHNIQUE OF ACCURATELY CONTROLLING THE PROCESS DOES NOT EXIST. THERMOCOUPLES ARE LARGELY USED AT PRESENT, BUT THEY DO NOT PROVIDE ADEQUATE INFORMATION SUCH AS THE THERMAL GRADIENT ACROSS A SINGLE LARGE CRYSTAL. THE USE OF CHARGE-COUPLED DEVICES TO MEASUREAND CONTROL CRYSTAL GROWTH USING THE CZOCHRALSKI METHOD IS THE INNOVATION BEING STUDIED IN THIS PROJECT. ARRAYS OF CHARGE-COUPLED DEVICES AND PHOTOVOLTAIC DETECTORS DETECT TEMPERATURE VARIATIONS OF A SURFACE AREA. THESE DETECTORS CAN BE ADAPTED TO MONITOR THE TEMPERATURE MEASUREMENTS WITHIN THE CRYSTAL GROWTH OVENS AND PROVIDE FEED-BACK CONTROL TO REGULATE THE OVEN. DURING PHASE I, THE WORK CONCENTRATED ON TESTING SENSOR TYPES AND RESEARCHING THE VARIOUS COMPONENTS OF A CONTROL SYSTEM. IT WAS CONCLUDED THAT CHARGE-COUPLED DEVICES WERE SUFFICIENTLY UNIFORM TO BE USED AS A THERMAL SENSOR ABOVE 200 CENTIGRADE.

Principal Investigator:


0

Business Contact:

Small Business Information at Submission:

Electro Design Manufacturing
Po Box 2569 Highway 31 South Decatur, AL 35602

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