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International conference on Vacuum Electronics

作者： Y. Takiguchi K. Osada K. Miyakawa M. Nanba S. Okazaki T. Yamagishi N. Egami K. Tanioka M. Tanaka S. Itoh NHK Science & Technical Research Laboratories Tokyo Japan Product & Development Center Futaba Corporation Chiba Japan

ISBN: (纸本)0780372565

In a new application of field emitter arrays (FEAs), a unique, ultrahigh-sensitivity, flat image sensor that consists of an FEA and an avalanche-mode photoconductive target is proposed. We have been working to develop highly sensitive camera tubes with a high-gain avalanche rushing amorphous photoconductor (HARP) target. Although our latest HARP tube is about 100 times as sensitive as a conventional solid-state image sensor, it suffers from drawbacks related to its length (about 100 mm) and power consumption. To overcome these problems and develop a next-generation, ultra-high sensitivity, flat image sensor, we have developed an FEA image sensor.

关键词： Image sensors Prototypes Voltage sensor arrays Fluctuations Photoconductivity Cameras Electrodes Electron emission Laboratories

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Lessons learned in aerospace technology transfer to automotive applications: a mature company undergoes a startup experience

Lessons learned in aerospace technology transfer to automoti...

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IEEE International conference on Engineering Management (EMC)

作者： A.M. Madni L.E. Costlow BEI Technologies Inc. Sylmar CA USA

After a severe downturn in its traditional aerospace and defense (A&D) markets in the early 1990s, Systron Donner Inertial Division (SDID), a subsidiary of BEI Technologies, Inc., decided to enter commercial markets with ground breaking new technology for a solid-state rate gyroscope, the Quartz Rate sensor (QRS). The quartz Coriolis force technology was appropriate for a new automotive brake system application, but the company required radical changes in its operations to achieve successful penetration of the automotive market. After four decades exclusively in the A&D business, this decision had massive implications for the company's marketing and contracting approach, business system infrastructure, manufacturing operations, facility layout, quality system, supply-chain management, and engineering product development. Indeed, entry into the automotive market required changes that posed management challenges similar to a start-up company.

关键词： Technology transfer Automotive applications Automotive engineering Companies Business solid state circuits Gyroscopes Force sensors Appropriate technology Manufacturing

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Small HgCdTe infrared detector arrays from UWA

Small HgCdTe infrared detector arrays from UWA

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conference on Optoelectronic and Microelectronic Materials and Devices

作者： J. Antoszewski C.A. Musca J.M. Dell L. Faraone M. Wagener I. Switala R. Oermann School of Electrical Electronic & Computer Engineering University of Western Australia Crawley WA Australia Defence Science and Technology Organisation Edinburgh SA Australia

Single infrared detectors and small arrays find widespread applications in spectroscopy, radiometry, scanning imaging systems, target tracking etc. The technology of such devices based on mercury cadmium telluride (HgCdTe), the material of choice for high performance infrared detectors, has been a subject of intensive research in many countries. Projects conducted in this field at The University of Western Australia resulted in the development of a technology that allows the fabrication of state of the art photovoltaic infrared detectors with n- on p-junctions obtained by plasma induced type conversion using reactive ion etching (RIE). Using this technology, small arrays have been fabricated, flip chip bonded to readout/fanout, packaged and tested. The arrays comprised of 8 /spl times/ 8 photodiodes with 50 /spl mu/m /spl times/ 50 /spl mu/m size and 100 /spl mu/m pitch, passivated with thermally evaporated CdTe/ZnS double layer. The best arrays are 100% operational and highly uniform. In this paper properties of these detector arrays are presented and analysed.

关键词： Infrared detectors sensor arrays Spectroscopy Radiometry Optical imaging Target tracking Cadmium compounds Conducting materials Fabrication Photovoltaic systems

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New piezoceramic PZT-PNN material for medical diagnostics applications

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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 2001年第10-11期21卷 1469-1472页

作者： Bove, T Wolny, W Ringgaard, E Pedersen, A Ferroperm Piezoceram AS DK-3490 Kvistgaard Denmark

The development of a new piezoceramic material, Ferroperm. Pz21, optimised for use in medical diagnostics applications is described. The requirements to such a material are very high permittivity, sensitivity and coupling factors, and at the same time a relatively high Curie temperature. The structure must furthermore be very dense and fine-grained, since dicing of small sub-elements for medical arrays must be performed without damaging the material. The developed material is a solid solution between a PZT phase and the relaxor phase Pb(Ni1/3Nb2/3)O-3. A comparison between different production processes is given, and a new solid state route for production of very dense and fine-grained materials is presented. Very positive characteristics are generally observed, and a stable behaviour even at elevated temperatures indicate that the material can find applications not only in the medical market, but also as a more general sensor/actuator. (C) 2001 Elsevier Science Ltd. All rights reserved.

关键词： functional applications perovskites piezoelectric properties powders : solid state reaction PZT

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Low-temperature PECVD-deposited silicon nitride thin films for sensor applications

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SURFACE & COATINGS TECHNOLOGY 2001年第0期142卷 808-812页

作者： Suchaneck, G Norkus, V Gerlach, G Dresden Univ Technol Inst Solid State Elect D-10602 Dresden Germany

Polymer-like silicon-rich SiNx:H films suitable for transparent VIS/NIR/MIR-range optical coatings were deposited by PECVD at a substrate temperature of 80 and 150 degreesC. Optical properties and film microstructure were investigated by transmission/reflection measurements and by FTIR. Air exposure for more than 1 year reveals no post-oxidation with time. The application as an antireflective coating for IR-sensor arrays is demonstrated. (C) 2001 Elsevier Science BN. All rights reserved.

关键词： plasma-enhanced CVD low temperature deposition silicon-rich silicon nitride

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Stripe geometry light emitting diodes over pulsed lateral epitaxial overgrown GaN for solid state white lighting

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PHYSICA STATUS solidI A-APPLIED RESEARCH 2001年第1期188卷 147-150页

作者： Shatalov, M Chitnis, A Basak, D Yang, JW Fareed, Q Simin, G Khan, MA Gaska, R Shur, MS Univ S Carolina Dept Elect Engn Columbia SC 29208 USA Sensor Elect Technol Inc Latham NY 12110 USA

The stripe geometry InGaN/GaN and InGaN/AlInGaN multiple quantum well light emitting diodes (LEDs) were fabricated using pulsed lateral epitaxial overgrowth and conventional GaN layers over sapphire. Material quality improvement due to overgrowth of GaN layer results in. enhanced LED output power for broad area square geometry devices emitting at 430 rim. Using of stripe geometry edge emitting LEDs allows considerable reducing of the device differential resistance and improving of the output power density. The Power enhancement and case of thermal management makes the arrays of stripe geometry LEDs to be promising for high power applications.

关键词： 78.60.Fi 81.05.Ea S7.14

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development of a CdZnTe-based small field of view gamma camera

Development of a CdZnTe-based small field of view gamma came...

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conference on Penetrating Radiation Systems and applications III

作者： Parnham, K Grosholz, J Davis, RK Vydrin, S Cupec, CA II VI Inc Ev Prod Saxonburg PA 16056 USA

ISBN: (纸本)0819442224

The interest in the use of CdZnTe room-temperature, solid-state detectors for Nuclear Medicine applications continues to grow. Efforts are underway at several companies and institutes to develop CdZnTe detector systems to compete with existing scintillator-based Large Field of View (LFOV) gamma cameras. eV PRODUCTS is focusing on the development of Small Field of View (SFOV) gamma cameras using monolithic CdZnTe detector arrays coupled to custom designed, low noise analog read-out electronics. Electronic noise in the ASIC's has been minimized, and is typically less than 100 e rms (OpF). The detector readout system has the capability to perform automatic energy calibration, gain setting and discrimator level setting, along with a comprehensive self-diagnostic routine. The complete integrated unit includes a bias voltage generator, counters and communication control. A first prototype 256-channel device has been developed and constructed, with pixel dimensions of 1.8 x 1.8 mm(2), on a 34 x 34 x 5mm3 monolithic CdZnTe detector. Results obtained from this system will be presented, showing both the energy resolution and uniformity data for several arrays. The energy resolution has been demonstrated to be 3-5% FWHM @ 140 keV, with photopeak efficiencies of 70-80%.

关键词： CdZnTe small field of view gamma camera ASIC energy resolution photopeak efficiency

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Three-dimensional laser radar with APD arrays

Three-dimensional laser radar with APD arrays

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conference on Laser Radar Technology and applications VI

作者： Heinrichs, RM Aull, BF Marino, RM Fouche, DG McIntosh, AK Zayhowski, JJ Stephens, T O'Brien, ME Albota, MA MIT Lincoln Lab Lexington MA 02420 USA

ISBN: (纸本)0819440728

M.I.T. Lincoln Laboratory is actively developing laser and detector technologies that make it possible to build a three-dimensional laser radar (3-D ladar) with several attractive features, including capture of an entire 3-D image on a single laser pulse, tens of thousands of pixels, few-centimeter range resolution, and small size, weight, and power requirements. The laser technology is based on diode-pumped solid-state microchip lasers that are passively Q-switched. The detector technology is based on Lincoln-built arrays of avalanche photodiodes (APD s) operating in the Geiger mode, with integrated timing circuitry for each pixel. The advantage of these technologies is that they offer the potential for small, compact, rugged, high-performance, systems which are critical for many applications.

关键词： Avalanche photodetectors LIDAR 3D image processing Laser development sensors Laser applications Pulsed laser operation Image processing Mirrors Semiconductor lasers

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Superconducting electronics requirements for single-photon, energy resolving detectors

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IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 2001年第1期11卷 1231-1234页

作者： Gulian, AM Fritz, GG Wood, KS Van Vechten, D USRA NRL Washington DC 20375 USA Off Naval Res Arlington VA 22217 USA

development of single photon sensors capable of determining the energy ("color") of each photon incident on a pixelated focal plane in real time is a central activity of many groups worldwide developing state-of-the-art hardware for the space astrophysics community. Terrestrial applications in materials analysis are also being targeted. The most successful class of approaches uses "hot-electron" microbolometers in which the energy of the photon elevates the electronic temperature in a metallic absorber and a dedicated thermometer measures this excursion, In a class of devices called thermoelectric microbolometers the temperature sensor utilizes the Seebeck effect. Estimates of theoretical performance for a complete megapixel array are quite positive and the prototype single-pixel devices are under test. Superconducting electronics is a critical part of the signal acquisition chain. Three different types of SQUID-array amplifiers coupled to our detector pixels have been tested. The parameters of optimized SQUID-array preamplifiers is discussed.

关键词： SQUID electronics single-photon fast detectors megapixel arrays superconductos

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Superconducting electronics requirements for single-photon, energy resolving detectors

Superconducting electronics requirements for single-photon, ...

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2000 Applied Superconductivity conference

作者： Gulian, AM Fritz, GG Wood, KS Van Vechten, D USRA NRL Washington DC 20375 USA Off Naval Res Arlington VA 22217 USA

关键词： SQUID electronics single-photon fast detectors megapixel arrays superconductos

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