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检索条件"任意字段=Conference on Solid State Sensor Arrays - Development and Applications"

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Carbon nanotube-based high temperature vacuum microelectronics for E&P applications

Carbon nanotube-based high temperature vacuum microelectroni...

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SPE International Oilfield Nanotechnology conference 2012

作者： Manohara, H. Mojarradi, M. Toda, R. Lin, R.H. Jet Propulsion Laboratory California Institute of Technology United States

ISBN: (纸本)9781622761104

Field emission from carbon nanotube (CNT) bundles has been applied to develop new class of computational vacuum microelectronics for harsh environment applications. CNTs have demonstrated superior field emission performance because of their low emission threshold, high current density, and are conducive for monolithic integration with silicon structures to develop microelectronic/microsensor systems. In this paper we present high-temperature tolerant "digital" vacuum electronics using CNTs. This technology is applicable to in situ sensor electronics for down-hole applications where the operating environment is high temperature, high pressure, and has corrosive chemicals. The digital and analog electronic devices developed using CNT-vacuum microelectronic technology can be integrated with sensor systems to achieve prolonged stand-alone operation during E&P. NASA-JPL has developed high performance cold cathodes using arrays of carbon nanotube bundles that produce > 15 A/cm2 at applied fields of 5 to 8 V/μm. They have exhibited robust operation in poor vacuums of 10-6 to 10-4 Torr- a typically achievable range inside hermetically sealed microcavities. By monolithically integrating CNT cathodes with micromachined Si multi-gate structures we have demonstrated a new class of programmable "vacuum" logic gates. We have achieved switching operation at temperatures up to 700°C. The initial design, operation, and the potential performance in an improved design will be presented in this paper along with vacuum packaging techniques to make stand alone devices for circuit board integration. CNT-vacuum microelectronics opens up a new regime of in situ electronics for novel sensor/electronics systems because of their inherent high-temperature tolerance, and corrosion resistance. Unlike traditional vacuum tubes, these are low power, miniature, and potentially as fast as their solid-state counterparts while exhibiting superior reverse bias or leakage current characteristics. These de

关键词： Carbon nanotubes

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Cost effjective 3D glass microfabrication for advanced packaging applications

Cost effjective 3D glass microfabrication for advanced packa...

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8th Annual IMAPS International conference and Exhibition on Device Packaging, DPC 2012 - In Conjunction with the Global Business Council, GBC 2012 Spring conference

作者： Flemming, Jeb H. Dunn, Kevin Gouker, James Schmidt, Carrie Cook, Roger 3D Glass Solutions Life Bioscience 4343 Pan American Frwy NE Albuquerque NM 87107 United States

The most singular focus of the electronics industry during the last 50 years has been to miniaturize ICs by miniaturization of transistors and on-chip interconnections. Two major problems are foreseen with this approach;(1) electrical leakage and (2) the lack of improved electrical performance beyond 16nm. As a result, the industry is transitioning from the current SOC-based approach to a through-silicon-via (TSV) based 3D IC-stacked approach. However, a major challenge remains;these 3D ICs need to be interconnected to other ICs with a much higher number of l/Os than are available with current ceramic or organic interposers. While silicon interposers currently in development can provide these high l/Os7 they cannot do so at low enough cost. Previously 3D Glass Solutions, a division of Life Bioscience, Inc. demonstrated the application of APEX™ Glass in interposer applications. Glass interposers possess many advantages over silicon interposers including: cost, production time, and scale. 3D Glass Solution's APEX™ Glass ceramic is a photo-sensitive material used to create high density arrays of through glass vias (TG Vs) using three simple processing steps: exposure, baking, and etching. To date, we have been successful in producing large arrays of 12 micron diameter TGVs, with 14 micron center-to-center pitch, in 125 micron thick APEX™ Glass ceramic. In this extended abstract we presents our continued efforts in glass interposer Microfabrication, with an emphasis on post-production advances including TGV metal filling and surface metallization.

关键词： Microfabrication

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development of Small Unit Cell Avalanche Photodiodes for UV Imaging applications

Development of Small Unit Cell Avalanche Photodiodes for UV ...

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conference on Advanced Photon Counting Techniques VI

作者： Sood, Ashok K. Welser, Roger E. Richwine, Robert A. Puri, Yash R. Dupuis, Russell D. Ryou, Jae-Hyun Dhar, Nibir K. Suvarna, P. Shahedipour-Sandvik, F. Magnolia Opt Technol Inc 52-B Cummings Pk Woburn MA 01801 USA Georgia Inst Technol Sch Wlect & Comp Engn Atlanta GA 30332 USA DARPA MTO Arlington VA 22203 USA CNSE Coll Nanosci & Engn Albany NY 12203 USA

ISBN: (纸本)9780819490537

High resolution imaging in the UV band has a lot of applications in defense and commercial systems. The shortest wavelength is desired for spatial resolution which allows for small pixels and large formats. UVAPD's have been demonstrated as discrete devices demonstrating gain. The next frontier is to develop UV APD arrays with high gain to demonstrate high resolution imaging. We will discuss model that can predict sensor performance in the UV band using APD's with various gain and other parameters for a desired UV band of interest. SNR's can be modeled from illuminated targets at various distances with high resolution under standard atmospheres in the UV band and the solar-blind region using detector arrays with unity gain and with high-gain APD's. We will present recent data on the GaN based APD's for their gain, detector response, dark current noise and the 1/f noise. We will discuss various approaches and device designs that are being evaluated for developing APD's in wide band gap semiconductors. The paper will also discuss state-of-the-art in UV APDs and the future directions for small unit cell size and gain in the APD's.

关键词： Avalanche photodetectors Ultraviolet radiation Gallium nitride Signal to noise ratio Pulsed laser operation sensors Atmospheric modeling Target detection Image resolution Ultraviolet detectors

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A 256×256 CMOS image sensor with ΔΣ-based single-shot compressed sensing

A 256×256 CMOS image sensor with ΔΣ-based single-shot com...

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IEEE International conference on solid-state Circuits (ISSCC)

作者： Yusuke Oike Abbas El Gamal Sony Atsugi Japan Stanford University Stanford CA USA Stanford University Stanford CA

Low power consumption is a primary concern in many CMOS image-sensor applications. As the resolution of these sensors has increased while maintaining or increasing their frame rates, A/D conversion has become the dominant component of power consumption [1]. Conventional image compression can help reduce the readout rate [2] (and hence its power consumption), but cannot reduce the A/D conversion power consumption, since it is performed after all pixel values have been converted to the digital domain.

关键词： Image coding arrays Compressed sensing Power demand CMOS image sensors Energy consumption

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Study of Maintaining Stable SSPM-Based Detector Gain by Active Bias Control

Study of Maintaining Stable SSPM-Based Detector Gain by Acti...

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IEEE Nuclear Science Symposium / Medical Imaging conference Record (NSS/MIC) / 19th Room-Temperature Semiconductor X-ray and Gamma-ray Detector Workshop

作者： Sun, Xishan Lan, Kejian A. Shao, Yiping Univ Texas MD Anderson Canc Ctr Houston TX 77030 USA

ISBN: (纸本)9781467320306;9781467320283

It is well known that the gain and noise of solid-state photomultiplier (SSPM) is sensitive to the temperature, which is a big concern for its practical applications. In this study, we tested a simple method to maintain the overall detector signal output level (namely detector gain which includes factors of photon intensity, wavelength and SSPM gain) at different temperatures by active bias control (ABC), which measures the SSPM bias voltage as a function of temperature under the same detector output gain and uses it as a calibration for gain stability control. The experiment setup includes a laser LED (US-Lasers D650-5) as an input light source, a SSPM (Hammatsu MPPC), a enclosure box for the temperature control from 25 C to 37 C, a temperature sensor at the precision of 0.25 C, a bias control power supply with precision 0.01V and the dedicated detector readout electronics with an ASIC and FPGA-based signal processing and acquisition. All measurements, calibration, and control were automated with LabView based software. The measured bias-temperature relationship under the same detector gain shows a linear curve with a slop of 0.0565 V/C, matching with the vendor's specification. The results show that ABC can achieve high precision for detector gain stability control: the measured gain variations were within 1% with gain stability control and similar to 70% without gain stability control, over the temperature ranging from 25 C to 37 C. In summary, the method is simple, straightforward for implementation, and effective to control the gain variations for SSPM-based detector.

关键词： application specific integrated circuits calibration field programmable gate arrays high energy physics instrumentation computing light emitting diodes light sources nuclear electronics photodetectors photomultipliers physical instrumentation control power supplies to apparatus readout electronics scintillation counters signal detection silicon radiation detectors stability temperature control temperature sensors virtual instrumentation voltage measurement

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A 7-to-10b 0-to-4MS/s flexible SAR ADC with 6.5-to-16fJ/conversion-step

A 7-to-10b 0-to-4MS/s flexible SAR ADC with 6.5-to-16fJ/conv...

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IEEE International conference on solid-state Circuits (ISSCC)

作者： Pieter Harpe Yan Zhang Guido Dolmans Kathleen Philips Harmke De Groot Holst Centre Imec Eindhoven Netherlands Eindhoven University of Technology Eindhoven Netherlands

applications like wireless sensor nodes require ultra-low-power ADCs. However, each application has different requirements for accuracy and bandwidth. Recent power-efficient ADCs for sensor applications are mostly designed for a fixed accuracy and a limited range of sample rates. An efficiently scalable sample rate (10kS/s to 10MS/s) has been demonstrated before, but without scalability of resolution. In, an ADC with both flexible resolution and sample rate is reported; however, its power efficiency is not as good as the point-solutions in. This paper describes a SAR ADC that achieves both good power efficiency (6.5-to-16fJ/conversion-step) and a wide range of flexibility (7-to-10b resolution, sample rates up to 4MS/s) to cover a large variety of applications, thereby reducing cost, design-time and overall complexity. To optimize the power efficiency for each resolution, both the DAC and comparator are reconfigurable. A 2-step conversion scheme is proposed for 9 and 10b settings to further reduce the power consumption. Finally, the use of an asynchronous architecture and dynamic circuitry ensures that the power consumption scales inherently proportional to the sample rate.

关键词： Accuracy Power demand Capacitors Noise solid state circuits CMOS integrated circuits arrays

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Biofunctionalization of carbon nanotubes with artificial chlorophyll-lipid membranes - spectral characterization

Biofunctionalization of carbon nanotubes with artificial chl...

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6th conference on Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies (ATOM-N)

作者： Barbinta Patrascu, M. E. Tugulea, Laura Univ Bucharest Fac Phys Dept Elect Solid State & Biophys Magurele Romania

ISBN: (纸本)9780819490896

The development of new advanced biomaterials with interesting properties has attracted much more attention in the recent years. This paper presents a new bottom-up approach strategy to design noncovalent entities based on single walled carbon nanotubes (SWCNTs) and artificial lipid membranes (liposomes), with potential biomedical applications (drug delivery systems). Small unilamellar liposomes (SUVs) were prepared by thin film hydration method. Chlorophyll a (Chla) extracted from fresh spinach leaves, was incorporated in liposomes (Chla/lipid molar ratio =1/100) and used as a molecular sensor to monitor the changes occurred in the artificial lipid bilayers. SWCNTs were added to a suspension of Chla-SUVs and then subjected to ultrasound treatment. These nanobiomaterials were investigated by different spectral methods (DLS, UV-VIS absorption and emission). The originality of this work lies in the way of design, preparation and characterization of new nanobiomaterials by CNT biofunctionalization. The use of Chla is also another element of novelty. The spectral properties of Chla were exploited by introducing specific spectral parameters in order to monitor the changes at molecular level and the bionanomaterial time evolution. The biofunctionalization of CNTs with Chla-liposomes could be an effective method to increase CNT biocompatibility and to reduce their toxicity, getting bionanocomposites with biomedical applications.

关键词： artificial lipid membranes liposomes carbon nanotubes chlorophyll bionanocomposites

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A sampling-based 128×128 direct photon-counting X-ray image sensor with 3 energy bins and spatial resolution of 60μm/pixel

A sampling-based 128×128 direct photon-counting X-ray image...

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IEEE International conference on solid-state Circuits (ISSCC)

作者： Hyun-Sik Kim Sang-Wook Han Jun-Hyeok Yang Sunil Kim Young Kim Sangwook Kim Dae-Kun Yoon Jun-Su Lee Jae-Chul Park Younghun Sung Seong-Deok Lee Seung-Tak Ryu Gyu-Hyeong Cho KAIST Daejeon South Korea Samsung Advanced Institute of Technology Yongin South Korea

The photon-counting method is one of several useful image-detection methods for digital X-ray imaging. The direct-type photon-counting method has higher X-ray-to-charge conversion efficiency and position resolution compared with the indirect-type detection method. Therefore, direct-type detection is more suitable for medical imaging applications for which the dose efficiency and the image quality are especially important.

关键词： X-ray imaging Photonics Preamplifiers Switches arrays Image sensors Photoconducting materials

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solid-state nanopores for detection of rod-like viruses and trapping of single DNA molecules

Solid-state nanopores for detection of rod-like viruses and ...

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IEEE conference on High Performance Devices

作者： Angus McMullen Xu Liu Jay Tang Derek Stein Physics Department Brown University Providence RI USA

solid-state nanopores are a promising class of electronic sensor for biosensing applications and single-molecule studies. We report the development of solid-state nanopores for the detection and study of single rod-li... 详细信息

关键词： DNA Cavity resonators Nanoscale devices Viruses (medical) Voltage measurement Strain Charge carrier processes

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state-of-the-art MCT IR-modules with enhanced long term and cycle stability

State-of-the-art MCT IR-modules with enhanced long term and ...

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conference on Infrared Technology and applications XXXVIII

作者： Breiter, R. Wendler, J. Lutz, H. Rutzinger, S. Schallenberg, T. Ziegler, J. Ruehlich, I. AIM INFRAROT MODULE GmbH Theresienstr 2 D-74072 Heilbronn Germany

ISBN: (纸本)9780819490315

Current trends on the enhancement of MCT FPA IR-modules are reduction of size, weight and power (SWaP), increase of resolution with large detector arrays, provision of staring LWIR or dual-band capability. This is achieved by reduction of pixel size, higher operating temperatures (HOT) or complex pixel structures together with the optimization of dewars, adapted cooling engines and proximity electronics. To meet these demands AIM is working on MCT single-band MWIR or LWIR modules with formats 640x512 or 1280x1024 in 15 mu m pitch and a dual-band MWIR/LWIR module 640x512 in 20 mu m pitch. As a first step high operating temperatures for MWIR 120K and LWIR 80K were demonstrated, development for MWIR >= 150K and LWIR >= 90K is ongoing. The modules are realized as integrated detector cooler assemblies (IDCA) with proximity electronics. The 640x512/15 mu m pitch modules are already available in application specific configurations e. g. having integral rotary or split linear cooling engines. Besides implementation of the above mentioned capabilities also improvement in long term and cycle stability of IR-modules has been achieved which is important to fully benefit from increased mission times and longer maintenance periods by HOT. Especially staring MCT LWIR modules so far required sophisticated non-uniformity correction (NUC) processing to provide acceptable long term image quality while former scanning systems usually used implemented temperature references for NUC update. For a thermal imager setup with the LWIR 640x512/15 mu m module two-point correction with factory calibrated gain coefficients together with a new offset calibration after every cool down cycle is used. The paper will present the results of AIM's current staring single-band MCT IR-modules in MWIR or LWIR configuration especially regarding to their long term and cycle stability.

关键词： MCT IR sensor MWIR LWIR high operating temperature NUC long term stability

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