Abstract:INNOVATIVE APPROACHES ARE PROPOSED FOR ANALYTICAL INVESTIGATION AND EVALUATION IN A PHASE I EFFORT TO DEVELOP MULTIPATH AND CLUTTER SUPPRESSION TECHNIQUES FOR LOW SURFACE GRAZING ANGLE CMW AND MMW RADAR DIRECT OR DIFFERENTIAL GUIDANCE OF A MISSILE TO A TARGET IN THEATER MISSILE DEFENSE APPLICATIONS.… more
Abstract:1Innovative techniques for radar high angle resolution are proposed for investigation in a Phase I effort to enable the resolution of the direction of arrival (DOA) of returns from multiple targets that fall within one beamwidth and within the same range and Doppler Cells. The techniques proposed… more
Abstract:THE NEXT GENERATION OF HIGH POWER, HIGH FREQUENCY ELECTRONIC DEVICE TECHNOLOGY WILL BE BASED ON WIDE BANDGAP SEMICONDUCTOR MATERIALS SUCH AS SIC, GAN AND DIAMOND. OF THESE, SILICON CARBIDE IS THE MOST PROMISING MATERIAL FOR NEAR TERM APPLICATIONS, SINCE ITS PROCESSING SHARES MANY COMMON FEATURES… more
Abstract:IMPROVING THE OXIDATION RESISTANCE OF CARBON-CARBON COMPOSITES IS KEY TO EXPANDING THE USE OF THIS MATERIAL SYSTEM INTO HIGHER TEMPERATURE APPLICATIONS. WHILE BORON PARTICLES HAVE BEEN ADDED TO THESE MATERIALS TO SEAL CRACKS IN PROTECTIVE COATINGS, OXIDATION OF THE CARBON MATRIX NEIGHBORING THE… more
Abstract:ELECTRON BOMBARDED SEMICONDUCTOR (EBS) GAIN DEVICES USING SILICON DIODES HAVE APPLICATIONS IN FREQUENCY AGILE, RADIO FREQUENCY (RF)/MICROWAVE POWER AMPLIFIERS, PHOTOMULTIPLIERS,IMAGING TUBES, AND HIGH SPEED SIGNAL PROCESSORS SUCH AS ANALOG-TO-DIGITAL CONVERTERS. HOWEVER, COMMERCIAL ACCEPTANCE OF… more
Abstract:SEVERAL METHODS, INCLUDING SPUTTERING, E-BEAM EVAPORATION, LASER ABLATION AND METALORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD), HAVE SUCCEEDED IN DEPOSITING HIGH QUALITY THIN FILMS OF HIGH TEMPERATURE SUPERCONDUCTORS (HTSC) ON 1 CM2 SUBSTRATES. HOWEVER, THE GROWTH OF HIGH QUALITY THIN FILMS OVER LARGE… more
Abstract:SEMICONDUCTOR DEVICES THAT PROVIDE RELIABLE HIGH POWER OR OPERATE AT EXTREMELY HIGH FREQUENCY IN HARSH ENVIRONMENTS SUCH AS SUSTAINED HIGH RADIATION LEVELS ARE REQUIRED FOR ASAT APPLICATIONS. THIS NEED FOR DEVICES THAT CAN OPERATE AT INCREASED TEMPERATURES OR WITH MINIMUM RADIATIVE COOLING HAS BEEN… more
Abstract:EXPLOITATION IN MICROELECTRONICS OF THE VERY HIGH DIELECTRIC CONSTANTS OF FERROELECTRIC PEROVSKITES SUCH AS BATIO3 AND PZT HAS BEEN LIMITED BY MATERIALS PROCESSING AND COMPATIABILITY PROBLEMS. HIGH QUALITY FERROELECTRIC THIN FILMS HAVE NOT BEEN GROWN AT TEMPERATURES COMPATIABLE WITH STANDARD SI OR… more
Abstract:ZINC SELENIDE (ZNSE) HAS IMPORTANT POTENTIAL APPLICATIONS ASA MATERIAL FOR VISIBLE LIGHT EMITTING DEVICES AND SHORT WAVELENGTH LASERS FOR DISPLAY APPLICATIONS. METALORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD) OF ZNSE IS THE MOST PROMISING PRODUCTION METHOD BUT IS HAMPERED BY ITS USE OF HYDROGEN… more
Abstract:IN THE NEXT DECADE INDIUM PHOSPHIDE BASED LASERS ARE EXPECTED TO BE CRITICALLY IMPORTANT IN INTEGRATED ELECTROOPTIC DEVICES AND FIBER OPTICS COMMUNICATION DUE TO THEIR HIGH SPEED AND BANDGAP IN THE NEAR INFRARED SPECTRAL REGION. SEMI-INSULATING TITANIUM DOPED INDIUM PHOSPHIDE IS REQUIRED FOR… more
Abstract:SINGLE CRYSTAL BATIO3 HAS ELECTRO-OPTIC AND PHOTOREFRACTIVE PROPERTIES THAT ARE AMONG THE MOST DESIRABLE OF ALL INORGANIC MEDIA. THE MATERIAL ALSO POSSESSES FERROELECTRIC PROPERTIES AND AN EXCEPTIONALLY HIGH DIELECTRIC CONSTANT, WHICH MAKE BATIO3 FILMS HIGHLY ATTRACTIVE FOR RADIATION HARD AND DRAM… more
Abstract:MCNC PROPOSES A FEASIBILITY STUDY AND EVALUATION OF THREE PROMISING APPROACHES TO THE FABRICATION OF SURFACE TEST STRUCTURES ON SILICON. SURFACE FEATURES ON THE FIRST STRUCTURE WILL BE PRODUCED BY CONTROLLABLY ETCHING THERMALLYGROWN OXIDES. FEATURES ON THE SECOND WILL BE MADE BY ETCHING… more
Abstract:The need for compact solid state ultraviolet light sources includes clinical light sources for a variety of surgeries, analytical instrumentation sources and communications systems based on shorter wavelengths that will be able to handle higher information densities. Such advanced optoelectric… more
Abstract:ORGANOMETALLIC VAPOR PHASE EPITAXY (OMVPE) IS A PROMISING TECHNIQUE FOR PRODUCING ULTRAHIGH PURITY III-V COMPOUND SEMICONDUCTOR. OMVPE CAN PRODUCE COMPLEX LAYERED STRUCTURES WITH THE ABRUPT INTERFACES REQUIRED FOR ADVANCED ELECTRONIC AND PHOTONIC DEVICES. UNFORTUNATELY, OMVPE CURRENTLY REQUIRES… more
Abstract:METALORGANIC CHEMICAL VAPOR DEPOSITION (MOCVD) HAS BECOME A SUCCESSFUL THIN FILM GROWTH TECHNIQUE DUE TO ITS INHERENT CONTROL OVER FILM COMPOSITION, PURITY, UNIFORMITY AND DEPOSITION RATE. THIN FILM TECHNOLOGY FOR FERROELECTRIC MATERIALS SUCH AS LEAD TITANATE AND PZT IS IN GREAT DEMAND DUE TO MANY… more
Abstract:DNA AND BIOSEQUENCES ARE BEING DETERMINED FASTER THAN THEY CAN BE COMPARED AND ANALYZED. PRESENT TECHNIQUES FOR RIGOROUSLY SEARCHING A LARGE DATABASE ARE COSTLY AND TIME CONSUMING. UNDER ALL PLAUSIBLE GROWTH PROJECTIONS, THE PROBLEM WILL SOON BECOME OVERWHELMING. A CUSTOM, VERY LARGE SCALE… more
Abstract:DIAMOND AND COPPER ARE UNIQUE IN THEIR ABILITY TO EFFICIENTLY CONDUCT HEAT, MAKING THEM PREMIER MATERIALS FOR ELECTRONIC APPLICATIONS FOR WHICH HEAT REMOVAL IS CRITICAL TO SYSTEM PERFORMANCE. DIFFERENCES IN THEIR OTHER PROPERTIES MAKE IT ATTRACTIVE TO COMBINE THESE TWO MATERIALS INTO A… more
Abstract:Many key steps in semiconductor "chip" manufacture utilize gases to form thin films which are critical to both device performance and cost. Over $2 billion worth of equipment, materials and peripherals are now sold annually to the semiconductor manufacturers who use gas phase processing. As… more
Abstract:High temperature superconducting (HTSC) materials offer the potential for major cost and performance advantages in advanced high frequency communications and radar sytems. Key to the use of these materials in subsystems is the fabrication of components, especially low loss switches, which can… more
Abstract:The continuing drive toward increased circuit densities in dynamic random access memories (DRAMs) has spurred great interest in new dielectric materials that permit greater storage capacitor charge density. Ferroelectrics are particularly attractive because of their intrinsically large dielectric… more
Abstract:The use of optoelectronic materials, such as gallium arsenide, in applications ranging from fiber optics to solid-state lasers has been growing rapidly. The fabrication of these materials requires exacting control over material composition, purity, uniformity and production rate. Typically these… more
Abstract:Infrared radiation sensing has grown rapidly as both a military and commercial detection and measurement technique. Recently the sensitivity of infrared detection has been improved by the used of focal plane arrays which have the capability of imaging scenes of very low contrast by collecting… more
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