| Defects and Impurities in Mercury Cadmium Telluride |
MAR 88 |
105 pages |
| Authors:
T. J. Magee; C. Leung; XMR INC SANTA CLARA CA
|
 | Over the past seven years since the initial identification of defect distributions in CdTe/CdZnTe (CdTe) substrates and epitaxial layers of HgCdTe, improvements in both substrate near-surface quality and defect zoning in epilayers have been noted. With the development of new procedures and analytical techniques, impurity zoning in localized regions can now be identified and potential sources isolated. In addition, The deployment of scanning UV-laser cleaning procedures, developed by the authors ... |
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| Acetylene Terminated Resin Mechanical Characterization |
MAY 86 |
68 pages |
| Authors:
C. Leung; ROCKWELL INTERNATIONAL THOUSAND OAKS CA SCIENCE CENTER
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| The physio-chemical and mechanical behavior of acetylene terminated polysulfone (ATS) were determined as a function of cure states. Given one pound of the resin cure kinetics, cure rheology and dynamic mechanical properties of the neat resin were measured. The following properties were also measured as function of cure states as determined by residual exothermic or spectroscopic methods: thermophysical properties (glass transition temperatures, dilatation and free volume, surface energetics and moisture ... |
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| Fluorescence Image Enhancement: Instruction Manual |
20 DEC 1982 |
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| Authors:
R. R. Pettijohn; C. Leung; C. Isaacson; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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 | This program has resulted in the development of a portable fluorescence image enhancement capability. The processing apparatus provides an advanced development model image enhancement kit suitable for field testing and technical evaluation. This instruction manual contains a detailed description of all aspects of fluorescence image enhancement and an illustrated step-by-step simplified procedure. Only tap water and receptacle voltage need to be provided by the user; all other apparatus and chemicals ... |
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| Metal-Semiconductor Reaction Phenomena and Microstructural Investigations of Laser Induced Regrowth of Silicon on Insulators |
JAN 1982 |
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| Authors:
T. J. Magee; C. Leung; R. D. Ormond; R. A. Armistead; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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| Solid phase regrowth of Silicon-on-sapphire has been investigated in the Si (amorphous)/Al(poly) Al2O3 (crystal) system. Using transmission electron microscopy, scanning electron microscopy, Auger electron spectroscopy and Hall effect measurements, it has been shown that Si is transported through an Al film at 550 C to produce p-type Si films on the sapphire substrate. The growth process has been shown to be initiated at Si nucleation sites on the substrate. These ... |
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| Silicon Quality: A Consideration for VHSI Circuit Development |
28 SEP 1981 |
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| Authors:
T. J. Magee; C. Leung; R. Ormond; L. J. Palkuti; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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| A detailed evaluation of the quality of silicon wafers from representative domestic and foreign vendors was made. To avoid pre-selection of wafers by vendors, material was obtained directly from device manufacturers and therefore represents a statistical sampling of Si material as currently being used in production-line processing. The results of this study have shown extreme batch-to-batch variability, lack of control in material quality and, in many cases, unacceptable levels of ... |
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| Investigation of Impurity Redistribution Effects and Solubility/ Diffusivity of Cr IN GaAs |
01 JUN 1981 |
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| Authors:
T. J. Magee; C. Leung; R. Ormond; R. A. Armistead; D. Stevenson; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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| Experiments have begun on the investigation of the thermodynamics and phase equilibrium of the Ga-Cr-As system and the solubility and diffusivity of Cr in GaAs under selected conditions of temperature and source composition. Allied experiments on the influence of defects in GaAs have shown the stable front surface of Cr depletion channels can be formed in GaAs for retarding the outdiffusion of Cr. Investigations of the influence of non-stoichiometric regions ... |
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| Metal-Semiconductor Reaction Phenomena and Microstructural Investigations of Laser-Induced Regrowth of Silicon on Insulators |
JAN 1981 |
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| Authors:
T. J. Magee; C. Leung; R. Ormond; R. A. Armistead; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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| The defect structure in CVD Si layers on sapphire were investigated before and after scanning laser annealing. Prior to laser annealing, the films were characterized by the presence of stacking faults, twinning zones dislocation lines producing large regions of high disorder. Subsequent to laser annealing under conditions to produce total melting of the Si layers it was shown that liquid phase epitaxial regrowth occurred resulting in regions of defect-free Si ... |
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| An Investigation of Impurity Redistribution Effects and Solubility/ Diffusivity of Cr in GaAs |
01 NOV 1980 |
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| Authors:
T. J. Magee; C. Leung; R. Ormond; R. A. Armistead; D. Stevenson; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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| Experiments have begun on the investigation of the thermodynamics and phase equilibrium of the Ga-Cr-As system and the solubility and diffusivity of Cr in GaAs under selected conditions of temperature and source composition. Allied experiments on the influence of defects in GaAs have shown that stable front surface Cr depletion channels can be formed in GaAs for retarding the outdiffusion of Cr. Investigations of the influence of non-stoichiometric regions introduced ... |
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| Seeded and Limited Seeding Regrowth of Si over SiO2 by CW Laser Annealing, |
14 OCT 1980 |
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| Authors:
T. J. Magee; L. J. Palkuti; R. Ormond; C. Leung; ADVANCED RESEARCH AND APPLICATIONS CORP SUNNYVALE CA
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| Photographic Image Enhancement Using Chemiluminescent and Fluorescent Light. |
30 NOV 1977 |
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| Authors:
C. Leung; R. G. Manning; R. R. Pettijohn; Z. Reyes; SRI INTERNATIONAL MENLO PARK CA
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| The goal of this research program was to develop methods analogous to autoradiographic photographic image enhancement in which light instead of nuclear radiation is emitted from the photographic image. These methods would allow images to be intensified without the inconvenience and limitations that result from the currently required radionuclides. Fluorescence and chemiluminescence methods suitable for photographic image enhancement have been investigated, and the feasibility of both approaches has been demonstrated. ... |
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| A Study of the Degradation of Platinum Black Fuel Cell Cathodes. |
OCT 1972 |
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| Authors:
P. A. Malachesky; C. Leung; H. Feng; TYCO LABS INC WALTHAM MASS
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| The report deals with a study of the mode of cathode electrocatalyst degradation in the H2-air phosphoric acid matrix fuel cell. The surface area changes which occur with thermal treatment of the Pt black electrocatalyst itself and as Teflon-Bonded fuel cell electrode material in air and in hot, concentrated H3PO4 electrolyte have been determined by BET, electrochemical, and X-ray techniques. The influence of such factors as temperature, electrode potential, and ... |
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| Anomalous Water. |
JUN 1972 |
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| Authors:
S. B. Brummer; J. I. Bradspies; G. Entine; H. Lingertat; C. Leung; TYCO LABS INC WALTHAM MASS
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| Experiments on the properties of anomalous water and its involatile residue - ;polywater; - are reported. Reliable yields of material have been obtained in flame-tapered glass tubes (up to 23 mm I.D.). Infrared spectra of this material show that it is similar to other US - grown products. There are strong indications that the major infrared active component is organic in nature. Molecular weight, refractive index, and boiling point studies ... |
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| Molecular Engineering of Pt-Based Electrocatalysts for Hydrocarbon Fuel Cell Electrodes. |
FEB 1971 |
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| Authors:
J. Giner; J. M. Parry; C. Leung; S. M. Smith; M. Turchan; TYCO LABS INC WALTHAM MASS
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| The program was concerned with relating the activity of platinum black catalysts for the anodic oxidation of propane in 85% H3PO4 at 150C to their physical characteristics. The first phase consisted of the controlled preparation of Pt catalysts with a wide range of activity and in defining the methods of physical characterization. Emphasis was placed on the formaldehyde reduction of chloroplatinic acid. The preparative method for a Pt black of ... |
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| HIGH TEMPERATURE SEMICONDUCTING COMPOUNDS FOR THERMOELECTRIC POWER GENERATION |
15 FEB 1961 |
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| Authors:
C. Leung; ELECTRO-OPTICAL SYSTEMS INC PASADENA CALIF
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| A search is being made for high temperature semiconducting compounds for thermoelectric power generation. Systems to be studied include, but are not necessarily limited to, combinations of U and/or Th with S, Se and/or Te. (Author) |
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Reports by Author
