Stock material or miscellaneous articles – Composite – Of bituminous or tarry residue
Patent
1987-06-18
1989-03-07
James, Andrew J.
Stock material or miscellaneous articles
Composite
Of bituminous or tarry residue
357 16, 357 232, 357 4, 428620, H01L 2934
Patent
active
048110779
ABSTRACT:
A surface termination of a compound semiconductor is provided wherein conditions are provided for a pristine surface to be retained in an unpinned condition and a surface layer of a non-metallic material is provided. A GaAs substrate is heated in an oxygen-free atmosphere at high temperature with hydrogen sulfide, producing a pristine surface with a coating of gallium sulfide covered with a 1,000 nanometer covering of low temperature plasma enhanced chemical vapor deposited silicon dioxide.
REFERENCES:
patent: 4354198 (1982-10-01), Hodgson et al.
Applied Physics Letters, Jul. 1987, "Nearly Ideal Electronic Properties of Sulfide Coated GaAs Surfaces" by Yablonovitch et al.
U.S. Ser. No. 06/874,738, filed 06/16/86, Kirchner et al.
Applied Physics Letters, Jul. 1987, "Dramatic Enhancement in the Gain of a GaAs/AlGaAs Heterostructure Bipolar Transistor by Surface Chemical Passivation" by Sandroff et al.
J. Vac. Sci. Technol., 17(5), Sep./Oct. 1980, p. 1134, "Effects of H.sub.2 S Adsorption on Surface Properties of GaAs [100] Grown in Situ by MBE" by Massies et al.
J. Vac. Sci. Technol. B3 (4), Jul./Aug. 1985, p. 1197, "Influence of S and Se on the Schottky-Barrier Height and Interface Chemistry of Au Contacts to GaAs" by J. R. Waldrop.
Fowler Alan B.
Freeouf John L.
Kirchner Peter D.
Warren Alan C.
Woodall Jerry M.
Crane Sara W.
International Business Machines - Corporation
James Andrew J.
Kilgannon, Jr. Thomas J.
Riddles Alvin J.
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