Accession Number : AD0851931

Title :   Solid-State Ultraviolet Detectors for Fire and Explosion Detection.

Descriptive Note : Final rept. 1 Nov 67-1 Dec 68,

Corporate Author : WESTINGHOUSE ASTRONUCLEAR LAB PITTSBURGH PA

Personal Author(s) : Campbell, Robert B.

Report Date : DEC 1968

Pagination or Media Count : 54

Abstract : Silicon carbide (SiC) ultraviolet detectors were fabricated from sublimation grown crystals. Aluminum or boron was used as the p-type dopants and nitrogen was the n-type dopant. The junction depth was reduced to the proper thickness using chlorine etching and/or molten salt etching. Contact to the base of the detector was made with tungsten disks. Small tungsten disks or rings with tantalum wire attachments were used as the top contact, replacing the previously used gold wire. A completely new encapsulation was designed and fabricated. This package utilizes the zero expansion concept and is demountable to permit the installation of additional detectors. (Author)

Descriptors :   *AVIATION SAFETY, *ULTRAVIOLET DETECTORS, FIRE ALARM SYSTEMS, MANUFACTURING, FIRE SAFETY, SUPERSONIC AIRCRAFT, HYPERSONIC AIRCRAFT, SILICON CARBIDES, CRYSTAL GROWTH, SUBLIMATION, DOPING, ASSEMBLY, BRAZING, ENCAPSULATION, MECHANICAL DRAWING, RELIABILITY(ELECTRONICS).

Subject Categories : Safety Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE