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LARGE-AREA PHOTODETECTOR ARRAYS

Award Information

Agency:
Department of Energy 		Branch:
N/A 		Award ID:
7756 		Program Year/Program:
1988 / SBIR
Agency Tracking Number:
7756 		Solicitation Year:
N/A 		Solicitation Topic Code:
N/A 		Solicitation Number:
N/A
Small Business Information
Plasma Physics Corp
Po Box 548 Locust Valley, NY 11560
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1988
Title: LARGE-AREA PHOTODETECTOR ARRAYS
Agency: DOE
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

HYDROGENATED AMORPHOUS SILICON (A-SI:H) IS A REVOLUTIONARY NEW SEMICONDUCTING MATERIAL THAT CAN BE DEPOSITED OVER LARGE AREAS AT RELATIVELY LOW COST, AND IS PARTICULARLY SUITED FOR APPLICATIONS SUCH AS LARGE-VOLUME PHOTODETECTORS IN HIGH ENERGY PHYSICS ACCELERATOR PROJECTS. PEREZ-MENDEZ AND OTHERS AT LAWRENCE BERKELEY LAB REPORTED RECENTLY THAT ALPHA PARTICLES WERE DETECTED WITH TILTED A-SI:H REVERSE-BIASED DIODES 10MUM THICK, BUT THICKER A-SI:H IS DESIRED FOR DETECTING WEAKLY IONIZING PARTICLES. HOWEVER, CONVENTIONAL PARALLEL-PLATE PLASMA REACTORS HAVE HAD LIMITEDSUCCESS IN DEPOSITING THICKER A-SI:H NEEDED FOR WEAKLY IONIZING PARTICLES. USING A NOVEL GRADIENT-FIELD (GF) PLASMA REACTOR, A-SI:H DIODES WERE PLASMA-DEPOSITED WITH GOOD ELECTRONIC PROPERTIES AND THICKNESS EXCEEDING 50MUM. PEREZ-MENDEZ DETECTED X-RAYS WITH 20MUM THICK A-SI:H DIODES DEPOSITED IN A GF REACTOR AND REPORTED AT LEAST A 10MUM DEPLETED ZONE AND A GAIN OF UNITY. THE PRODUCT OF GAIN AND BANDWIDTH OF PLASMA-DEPOSITED A-SI:H DIODES WILL BE MAXIMIZED BY ADJUSTING THE POSITION OF THE FERMI LEVEL IN ACCORDANCE WITH THE ROSE CRITERIA. A 40 X 40 DIODE ARRAY WILL BE FABRICATED. THE A-SI:H WILL BE DEPOSITED CONTINUOUSLY IN A ROTATING-DRUM PLASMA DEPOSITION SYSTEM TO PROVIDE UNIFORM THICKNESS OVER LARGE AREAS FOR DETECTOR ARRAYS.

Principal Investigator:


0

Business Contact:

John H Coleman
5166768468
Small Business Information at Submission:

Plasma Physics Corp
Po Box 548 Locust Valley, NY 11560

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