Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894955
Krishna Shenai
New material technologies such as Silicon Carbide (SiC) are promising in the development of compact high-power converters for next generation aerospace power electronics applications. This paper presents an optimized converter design approach that takes into consideration non-linear interactions among various converter components, source and load. A 50% improvement in converter power density is calculated for a 100 V-2 kV, 7 kW SiC DC-DC power converter operating at 150/spl deg/C as compared to a silicon power converter. Experimental results of hard- and soft-switched SiC power converters using commercial Schottky and PiN diodes and JFET's are reported at lower power levels.
碳化硅(SiC)等新材料技术在开发用于下一代航空航天电力电子应用的紧凑型高功率变换器方面前景广阔。本文提出了一种考虑变换器各部件、源和负载之间非线性相互作用的变换器优化设计方法。与硅功率变换器相比，100 V-2 kV, 7 kW SiC DC-DC功率变换器在150/spl度/C下工作，变换器功率密度提高了50%。本文报道了采用商用肖特基二极管和PiN二极管以及JFET的硬开关和软开关SiC功率变换器在较低功率水平下的实验结果。
{"title":"Silicon carbide power converters for next generation aerospace electronics applications","authors":"Krishna Shenai","doi":"10.1109/NAECON.2000.894955","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894955","url":null,"abstract":"New material technologies such as Silicon Carbide (SiC) are promising in the development of compact high-power converters for next generation aerospace power electronics applications. This paper presents an optimized converter design approach that takes into consideration non-linear interactions among various converter components, source and load. A 50% improvement in converter power density is calculated for a 100 V-2 kV, 7 kW SiC DC-DC power converter operating at 150/spl deg/C as compared to a silicon power converter. Experimental results of hard- and soft-switched SiC power converters using commercial Schottky and PiN diodes and JFET's are reported at lower power levels.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121047489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894997
B. Clough
Summary form only given, as follows. The Air Vehicles Directorate of the US Air Force Research Laboratory is pressing ahead with designing and implementing autonomous control systems for both individual UAVs as well as hierarchical and/or distributed control for packs (or swarms) of UAVs. The goal is to truly make the man the stategist, tell the UAV(s) what is needed and the UAVs go away, figure out how- to do it, and execute the mission. Implicit in all of this is safety. One of our goals is to make these UAVs as reliable as, or better than, manned aircraft. This paper looks at what that actually means without a pilot in the loop, and the requirements flow-down, both overt and implied, which places the specifications on the subsystems and components. At the end we "prognosticate" the possible impacts to current best practices in testing and certification, stressing the need to possibly look at this a bit differently for these types of systems-a paradigm shift may be in order.
{"title":"UAV autonomous control system reliability-what should it be, and how do we reach it?","authors":"B. Clough","doi":"10.1109/NAECON.2000.894997","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894997","url":null,"abstract":"Summary form only given, as follows. The Air Vehicles Directorate of the US Air Force Research Laboratory is pressing ahead with designing and implementing autonomous control systems for both individual UAVs as well as hierarchical and/or distributed control for packs (or swarms) of UAVs. The goal is to truly make the man the stategist, tell the UAV(s) what is needed and the UAVs go away, figure out how- to do it, and execute the mission. Implicit in all of this is safety. One of our goals is to make these UAVs as reliable as, or better than, manned aircraft. This paper looks at what that actually means without a pilot in the loop, and the requirements flow-down, both overt and implied, which places the specifications on the subsystems and components. At the end we \"prognosticate\" the possible impacts to current best practices in testing and certification, stressing the need to possibly look at this a bit differently for these types of systems-a paradigm shift may be in order.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116631056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894992
Sangwoo Cho, C. Lee, J. Chun, Dongmyung Ahn
We propose a new digital modulation classification method based on the continuous-time wavelet transformation (CWT) and the linear predictive coding (LPC) method. The LPC coefficients extracted from the LPC model of the CWT for a modulated signal is chosen as the feature used to classify the modulation types of BPSK, QPSK, FSK and jammer. By using several reference features per modulation type we can make our algorithm robust to the influence of noise. To verify the proposed modulation classification algorithm, simulations are performed, which demonstrate excellent classification rates.
{"title":"Classification of digital modulations using the LPC","authors":"Sangwoo Cho, C. Lee, J. Chun, Dongmyung Ahn","doi":"10.1109/NAECON.2000.894992","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894992","url":null,"abstract":"We propose a new digital modulation classification method based on the continuous-time wavelet transformation (CWT) and the linear predictive coding (LPC) method. The LPC coefficients extracted from the LPC model of the CWT for a modulated signal is chosen as the feature used to classify the modulation types of BPSK, QPSK, FSK and jammer. By using several reference features per modulation type we can make our algorithm robust to the influence of noise. To verify the proposed modulation classification algorithm, simulations are performed, which demonstrate excellent classification rates.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121829902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894943
Mohammad S. Alam, M. Akhteruzzaman
The pattern matching for fingerprints requires a large amount of data and computation time. Practical fingerprint identification systems require minimal errors and ultrafast processing time to perform real time verification and identification. By utilizing the two-dimensional processing capability, fast processing speed and non-interfering communication of optical processing techniques, such extremely fast real time fingerprint identification systems can be implemented. Among the various pattern matching systems, the joint transform correlator (JTC) has been found to be inherently suitable for real time matching applications. Among the various JTCs the fringe-adjusted JTC has been found to yield significantly better correlation output compared to alternate JTCs. In this paper, a fingerprint identification system has been developed based on the fringe-adjusted JTC. Since all pattern matching systems suffer from high sensitivity to distortions, the synthetic discriminant function concept has been incorporated in fringe-adjusted JTC to ensure distortion-invariant fingerprint identification.
{"title":"Real time fingerprint identification","authors":"Mohammad S. Alam, M. Akhteruzzaman","doi":"10.1109/NAECON.2000.894943","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894943","url":null,"abstract":"The pattern matching for fingerprints requires a large amount of data and computation time. Practical fingerprint identification systems require minimal errors and ultrafast processing time to perform real time verification and identification. By utilizing the two-dimensional processing capability, fast processing speed and non-interfering communication of optical processing techniques, such extremely fast real time fingerprint identification systems can be implemented. Among the various pattern matching systems, the joint transform correlator (JTC) has been found to be inherently suitable for real time matching applications. Among the various JTCs the fringe-adjusted JTC has been found to yield significantly better correlation output compared to alternate JTCs. In this paper, a fingerprint identification system has been developed based on the fringe-adjusted JTC. Since all pattern matching systems suffer from high sensitivity to distortions, the synthetic discriminant function concept has been incorporated in fringe-adjusted JTC to ensure distortion-invariant fingerprint identification.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122671215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894906
J. J. Sudano
Time has proven that /spl alpha/-/spl beta/ filters provide a good and useful tracking methodology when used with sensors that measure position only. As new sensors are being integrated into platforms that measure position and Doppler velocity, a new tracker is required to properly process both position and velocity sensor measurements. This article introduces an /spl alpha/-/spl beta/-/spl eta/-/spl theta/ filter, which processes both position and velocity sensor measurements. This new filter optimally tracks objects having a random acceleration maneuver model while being updated from a sensor having position and velocity measurement estimates.
{"title":"The /spl alpha/-/spl beta/-/spl eta/-/spl theta/ tracker with a random acceleration process noise","authors":"J. J. Sudano","doi":"10.1109/NAECON.2000.894906","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894906","url":null,"abstract":"Time has proven that /spl alpha/-/spl beta/ filters provide a good and useful tracking methodology when used with sensors that measure position only. As new sensors are being integrated into platforms that measure position and Doppler velocity, a new tracker is required to properly process both position and velocity sensor measurements. This article introduces an /spl alpha/-/spl beta/-/spl eta/-/spl theta/ filter, which processes both position and velocity sensor measurements. This new filter optimally tracks objects having a random acceleration maneuver model while being updated from a sensor having position and velocity measurement estimates.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131759811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894987
F. Oliveto
When a new complex electronic product is being developed, an approach is chosen, either directly or indirectly, to obtain the final design. Once the approach is chosen or implied, it is followed throughout the design and development phase. This is done to ensure that it will meet the specified requirements within the mechanical, electrical, and other environmental constraints. One approach allows all ingredients crucial of a successful product to be considered, such as: design, manufacturing, testing, reliability, human factors, producibility, and cost, as well as customer's needs and satisfaction. This approach-Concurrent Engineering-can be defined as a systematic team approach in which all disciplines participate in the design and development of products and related processes simultaneously to obtain common objectives. This paper delineates the detailed processes and procedures to implement concurrent engineering effectively and makes specific recommendations to obtain the desired results. In the process, it compares concurrent engineering to a symphony orchestra to illustrate the profit to be realized when all of the involved disciplines cooperate to produce the final product.
{"title":"Concurrent engineering: evolution and application","authors":"F. Oliveto","doi":"10.1109/NAECON.2000.894987","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894987","url":null,"abstract":"When a new complex electronic product is being developed, an approach is chosen, either directly or indirectly, to obtain the final design. Once the approach is chosen or implied, it is followed throughout the design and development phase. This is done to ensure that it will meet the specified requirements within the mechanical, electrical, and other environmental constraints. One approach allows all ingredients crucial of a successful product to be considered, such as: design, manufacturing, testing, reliability, human factors, producibility, and cost, as well as customer's needs and satisfaction. This approach-Concurrent Engineering-can be defined as a systematic team approach in which all disciplines participate in the design and development of products and related processes simultaneously to obtain common objectives. This paper delineates the detailed processes and procedures to implement concurrent engineering effectively and makes specific recommendations to obtain the desired results. In the process, it compares concurrent engineering to a symphony orchestra to illustrate the profit to be realized when all of the involved disciplines cooperate to produce the final product.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131993841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894914
Song Xiao, Yubin Xia, Lei Yan, Yuxiang Jiang
We have just developed a digital printing system in which the traditional negative film is replaced by the LCD. Since the image displayed on the LCD is influenced by the illuminant derived from the three dichroic mirrors (RGB), and gamma adjustment proceeded in the signal processor IC. We put forward a close-loop image adjustment subsystem including some hardware and a set of effective algorithms. The image adjustment is proceeded by detecting the RGB intensity of the image on the LCD through image sensors, and transferring it to the computer, and then setting the relationship between the image in the computer and the data from the image sensor by the algorithms. As a result, we can get the perfect photo image.
{"title":"Close-loop image adjustment subsystem in digital printing","authors":"Song Xiao, Yubin Xia, Lei Yan, Yuxiang Jiang","doi":"10.1109/NAECON.2000.894914","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894914","url":null,"abstract":"We have just developed a digital printing system in which the traditional negative film is replaced by the LCD. Since the image displayed on the LCD is influenced by the illuminant derived from the three dichroic mirrors (RGB), and gamma adjustment proceeded in the signal processor IC. We put forward a close-loop image adjustment subsystem including some hardware and a set of effective algorithms. The image adjustment is proceeded by detecting the RGB intensity of the image on the LCD through image sensors, and transferring it to the computer, and then setting the relationship between the image in the computer and the data from the image sensor by the algorithms. As a result, we can get the perfect photo image.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125608395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894995
W. T. Berridge, M. Talbert
With the acceptance of unmanned aerial vehicles (UAVs) as a primary platform within the Department of Defense (DOD) for gathering intelligence data, the amount of video information being recorded, analyzed, and archived continues to grow. Mechanisms for quickly locating and retrieving video segments of interest amongst the many hours of recorded video are required to accommodate the rapid turnaround expected in today's wartime planning environments. This paper demonstrates that attributes extracted or calculated from existing mission-related data (specifically telemetry and target data) can be indexed to support random access into archived video streams. These indexes allow video segments to be retrieved based on image characteristics and basic content thus supporting the search for clear, highly detailed images of targets and areas of interest.
{"title":"Scene-centric identification and retrieval of unmanned aerial vehicle (UAV) video segments","authors":"W. T. Berridge, M. Talbert","doi":"10.1109/NAECON.2000.894995","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894995","url":null,"abstract":"With the acceptance of unmanned aerial vehicles (UAVs) as a primary platform within the Department of Defense (DOD) for gathering intelligence data, the amount of video information being recorded, analyzed, and archived continues to grow. Mechanisms for quickly locating and retrieving video segments of interest amongst the many hours of recorded video are required to accommodate the rapid turnaround expected in today's wartime planning environments. This paper demonstrates that attributes extracted or calculated from existing mission-related data (specifically telemetry and target data) can be indexed to support random access into archived video streams. These indexes allow video segments to be retrieved based on image characteristics and basic content thus supporting the search for clear, highly detailed images of targets and areas of interest.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131866204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894989
A. Das, D. Eyster, R. Peters
It is claimed that a cognitive science approach to e-business operations with thin clients and intranets requires that both the client and server sides be taken as enterprises. This paper explains how the client-server process engineering demands the cohabitation of hybrid operations of many types like the remote procedure calls and message oriented middleware, or, storage area network and network attached storage. This paper establishes a claim for software engineering activities in a possibilistic domain.
{"title":"Cognitive software engineering for supporting thin clients intranet based e-commerce","authors":"A. Das, D. Eyster, R. Peters","doi":"10.1109/NAECON.2000.894989","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894989","url":null,"abstract":"It is claimed that a cognitive science approach to e-business operations with thin clients and intranets requires that both the client and server sides be taken as enterprises. This paper explains how the client-server process engineering demands the cohabitation of hybrid operations of many types like the remote procedure calls and message oriented middleware, or, storage area network and network attached storage. This paper establishes a claim for software engineering activities in a possibilistic domain.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116096338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2000-10-10DOI: 10.1109/NAECON.2000.894948
J. Huang, W. Qian, H. Klauk, T. Jackson, K. Black, P. Deines-Jones, S. Hunter
There is currently considerable interest in the fabrication of lightweight, large-area information displays, detectors, imaging sensors, and flexible electronic circuits. We have developed a process to fabricate thin-film amorphous silicon (a-Si) based active-matrix pixelized well detectors on polymeric substrates. Thin-film a-Si is inherently lightweight and can be deposited over very large areas. Electronic devices made by a-Si are typically made on rigid substrates such as glass plates, however, glass substrates are heavy, rigid, and fragile. Alternative substrates such as polymeric films are of interest for a variety of applications, including rugged active-matrix flat panel displays, lightweight spacecraft solar arrays, and flexible imaging sensors. Recently, we have demonstrated a-Si photovoltaic cells, a-Si thin-film transistors (TFTs), and integrated a-Si TFT circuits on flexible Kapton polyimide substrates with characteristics similar to devices made on glass substrates. Here we report on a flat-panel detector for X-rays and charged particles generated by gamma rays, which uses an array of microelectromechanical (MEMS)-like detector structures integrated with a-Si TFTs on a polymeric substrate.
目前，人们对轻质、大面积信息显示器、探测器、成像传感器和柔性电子电路的制造非常感兴趣。我们已经开发了一种在聚合物衬底上制造薄膜非晶硅(a- si)为基础的有源矩阵像素化阱探测器的工艺。a-Si薄膜本身就很轻，可以沉积在非常大的面积上。由a-Si制成的电子器件通常是在诸如玻璃板之类的刚性基板上制造的，然而，玻璃基板很重、坚硬且易碎。聚合物薄膜等替代基板可用于各种应用，包括坚固的有源矩阵平板显示器、轻型航天器太阳能阵列和柔性成像传感器。最近，我们展示了a-Si光伏电池，a-Si薄膜晶体管(TFT)，以及在柔性卡普顿聚酰亚胺衬底上集成的a-Si TFT电路，其特性与玻璃衬底上的器件相似。在这里，我们报道了一种用于x射线和伽马射线产生的带电粒子的平板探测器，它使用了一组类似微机电系统(MEMS)的探测器结构，并在聚合物衬底上集成了a- si tft。
{"title":"Active-matrix pixelized well detectors on polymeric substrates","authors":"J. Huang, W. Qian, H. Klauk, T. Jackson, K. Black, P. Deines-Jones, S. Hunter","doi":"10.1109/NAECON.2000.894948","DOIUrl":"https://doi.org/10.1109/NAECON.2000.894948","url":null,"abstract":"There is currently considerable interest in the fabrication of lightweight, large-area information displays, detectors, imaging sensors, and flexible electronic circuits. We have developed a process to fabricate thin-film amorphous silicon (a-Si) based active-matrix pixelized well detectors on polymeric substrates. Thin-film a-Si is inherently lightweight and can be deposited over very large areas. Electronic devices made by a-Si are typically made on rigid substrates such as glass plates, however, glass substrates are heavy, rigid, and fragile. Alternative substrates such as polymeric films are of interest for a variety of applications, including rugged active-matrix flat panel displays, lightweight spacecraft solar arrays, and flexible imaging sensors. Recently, we have demonstrated a-Si photovoltaic cells, a-Si thin-film transistors (TFTs), and integrated a-Si TFT circuits on flexible Kapton polyimide substrates with characteristics similar to devices made on glass substrates. Here we report on a flat-panel detector for X-rays and charged particles generated by gamma rays, which uses an array of microelectromechanical (MEMS)-like detector structures integrated with a-Si TFTs on a polymeric substrate.","PeriodicalId":171131,"journal":{"name":"Proceedings of the IEEE 2000 National Aerospace and Electronics Conference. NAECON 2000. Engineering Tomorrow (Cat. No.00CH37093)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114874940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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