Computer Science
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981spco.reptr....g&link_type=abstract
Final Report Spire Corp., Bedford, MA.
Computer Science
Cadmium Tellurides, Electron Irradiation, Epitaxy, Evaporation, Fabrication, Mercury Compounds, Single Crystals, Thin Films, Crystal Growth, Electron Beams, Infrared Detectors, Stoichiometry, Substrates
Scientific paper
The goal of this research is to produce large-area, thin-film, single crystal mercury cadmium telluride material for infrared detectors. The successful approach is to (1) evaporate cadmium telluride in an enclosed furnace on insulating crystalline substrates (hot wall epitaxy), (2) melt a thin surficial layer by pulsed electron beam irradiation to improve morphology, and (3) convert to mercury cadmium telluride by evaporation and diffusion at constant temperature. The final result is a single crystal film of Hg (sub 1-x) Cd sub x Te, 30 microns thick and 0.5 inch square, with a compositional variation of x less than + or - 0.0007. Films of up to 20 microns thick, 1 inch o.d., single crystal (but twinned) CdTe were produced by the first process. These faceted films were smoothed without change of surface stoichiometry or structure by the second process. Evaporation of HgTe at less 0.5 atm Hg overpressure onto the CdTe film produced the final result on mica or quartz substrates. Electron mobility at 77 K was as high as 1.5 x 10 to the 5th power sq cm/V-s in the final samples.
Greenwald A. C.
Miles John
No associations
LandOfFree
HgCdTe fabrication using directed energy techniques does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with HgCdTe fabrication using directed energy techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HgCdTe fabrication using directed energy techniques will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1748803