Accession Number:

ADA222082

Title:

Laser Induced Surface Chemical Epitaxy

Descriptive Note:

Final rept. 1 Jan 1988-31 Dec 1989

Corporate Author:

AERODYNE RESEARCH INC BILLERICA MA

Report Date:

1990-03-01

Pagination or Media Count:

65.0

Abstract:

Studies of the thermal and photon-induced surface chemistry of dimethyl cadmium DMCd and dimethyl tellurium DMTe on GaAs100 substrates under ultrahigh vacuum conditions have been performed for substrate temperatures in the range of 123 K to 473 K. Results indicate that extremely efficient conversion of admixtures of DMTe and DMCd to CdTe can be obtained using low power 193 nanometers laser pulses at substrate temperatures of 123 K. Subsequent annealing at 473 K produces an epitaxial film. Given the similar electronic structure of other II-VI metal alkyls, such as dimethyl mercury, zinc, and selenium, it is believed that laser induced surface chemical epitaxy is suitable for producing patterned deposits of II-VI quantum well structures. Keywords II- VI epitaxy, Laser induced chemistry, Deposition, Thin film, Vapor deposition, LCVD, MOMBE, Metalorganic molecular beam epitaxy.

Subject Categories:

  • Organic Chemistry
  • Radiation and Nuclear Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE