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Proceedings. 11th International Symposium on Electrets最新文献

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Ferroelectric PVDF polymer for high pressure and shock compression sensors 用于高压和冲击压缩传感器的铁电PVDF聚合物
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042983
F. Bauer
{"title":"Ferroelectric PVDF polymer for high pressure and shock compression sensors","authors":"F. Bauer","doi":"10.1109/ISE.2002.1042983","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042983","url":null,"abstract":"Electrical processing of ferroelectric polymer (PVDF) with the Bauer cyclic poling method can produce individual films with a well-defined polarization up to 9 /spl mu/C/cm/sup 2/. The piezoelectric response PVDF stress gauges subjected to shock loading exhibits a reproducible behavior up to 25 GPa. Shock pressure profiles obtained with \"in situ\" PVDF gauges in high explosive in a detonation regime have been achieved. Observations of a fast superpressure of a few nanoseconds have raised the question of the loading path dependence of the PVDF response at high shock pressure levels. Consequently, studies of the piezoelectric behavior of PVDF gauges under impact loading using a two-stage light gas gun have been conducted. These results show that the PVDF response appears independent of the loading path up to 35 GPa. Furthermore, laser interferometry (VISAR) was used in some experiments to determine the particle velocity history of the PVDF gauge. The agreement between particle velocity and pressure histories is exceptional.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124501535","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}
引用次数: 19
Readout circuit design for uncooled infrared focal plane arrays 非制冷红外焦平面阵列读出电路设计
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043015
G. Xie, L. Deng, T. Wang, J.H. Xu, X.D. Chen, Y.D. Jiang, Z.M. Wu, C.H. Huang, B. C. Yang
{"title":"Readout circuit design for uncooled infrared focal plane arrays","authors":"G. Xie, L. Deng, T. Wang, J.H. Xu, X.D. Chen, Y.D. Jiang, Z.M. Wu, C.H. Huang, B. C. Yang","doi":"10.1109/ISE.2002.1043015","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043015","url":null,"abstract":"A readout circuit for uncooled infrared focal plane arrays is successfully designed. The principle of the signal processing is studied and proper circuit is successfully designed and made to realize the signal processing. The feature of the signal processing circuit for the uncooled infrared focal plane array depends on the readout circuit.. Readout circuit discussed here is a RC oscillatory circuit. The resistor of the oscillatory circuit is VOx thin film, which is very sensitive to temperature. The relationship of the temperature and the period of the oscillatory circuit is discussed. The signal processing circuit employs the relationship to extract the temperature from the period of the output signal. The imaging processing part uses the extracted temperature information to get the infrared image.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130575923","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}
引用次数: 3
Effect of electret on surface charge of red blood cell in scalded rats 驻极体对烫伤大鼠红细胞表面电荷的影响
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043001
J. Jiang, L. Cui, Z. Xia, X.P. Wang, C. Song
{"title":"Effect of electret on surface charge of red blood cell in scalded rats","authors":"J. Jiang, L. Cui, Z. Xia, X.P. Wang, C. Song","doi":"10.1109/ISE.2002.1043001","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043001","url":null,"abstract":"The electrophoretic mobility (EPM) and contents of sialic acid (SA) on the red blood cell (RBC) were determined by means of cell electrophoresis and SA micro-chemical calorimetry to explore the mechanism of effect electret on surface charge of RBC in scalded rats. The results indicated that (1) EPM and SA contents of RBC in each period after rat scalded were decreased significantly as compared with those of in control group. (2) In negative electret group, EPM and SA contents were increased markedly with time. (3) Positive electret showed no notable effect on EPM and SA contents of RBC after rats were scalded. Negative electret can improve the microcirculation and hematological rheology index of scalded rats by stabilizing the SA contents of RBC to repair the electret state of RBC in scalded rats.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132417251","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}
引用次数: 1
A monopole ultrasonic pulse generator using PVDF piezoelectric film 一种利用PVDF压电薄膜的单极超声脉冲发生器
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043010
F. Zheng, Y. Zhang, Z. Xia
{"title":"A monopole ultrasonic pulse generator using PVDF piezoelectric film","authors":"F. Zheng, Y. Zhang, Z. Xia","doi":"10.1109/ISE.2002.1043010","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043010","url":null,"abstract":"In this paper, a monopole ultrasonic pulse generator driven by a step-function voltage with a fast falling time is presented. We consider that the waveform and the pulse width of the ultrasonic is decided by the thickness of PVDF piezoelectric film transducer, the falling time of step-function voltage, the backing and the shape of acoustic propagation medium. The pulse generator is suitable to use for measuring the space charge distribution in solid dielectric, the width of pressure pulse is about 50 ns. It is also suitable for the other applications, e.g., the ultrasonic medical diagnosis. All these results are acquired through the piezo-PWP (Pressure Wave Propagation) measuring system applied for the study of space charge.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131353791","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}
引用次数: 1
Ferroelectric properties of ultrathin film of VDF/TrFE copolymers VDF/TrFE共聚物超薄膜的铁电性能
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1043028
Y. Takahashi, A. Fukuda, A. Kitahama, T. Furukawa
{"title":"Ferroelectric properties of ultrathin film of VDF/TrFE copolymers","authors":"Y. Takahashi, A. Fukuda, A. Kitahama, T. Furukawa","doi":"10.1109/ISE.2002.1043028","DOIUrl":"https://doi.org/10.1109/ISE.2002.1043028","url":null,"abstract":"Ferroelectric properties were examined for the ultra thin films of vinylidene fluoride/trifluoroethylene copolymers spin-coated onto Al-deposited glass substrate. As thickness is decreased, dielectric anomaly rapidly diminishes whereas the dielectric relaxation associated with glass transition remains. The polarization switching transient splits into fast and slow processes. The slow process shows a particular shift toward longer time regions with decreasing thickness. These results were analyzed on the basis of a double layer model consisting of ferroelectric bulk and metal-polymer interface. It is shown that the metal-polymer interface is a 2 nm thick, non-ferroelectric layer with suppressed molecular motion. When polarization reversal starts to occur, the interface layer causes a production of the depolarization field in the ferroelectric bulk layer to impede polarization reversal until appropriate space charge rearrangement reduces the depolarization field.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121178673","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}
引用次数: 0
Electrical properties of polyimide with water absorption 具有吸水性的聚酰亚胺的电性能
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042996
S. Fujita, Y. Kamei
{"title":"Electrical properties of polyimide with water absorption","authors":"S. Fujita, Y. Kamei","doi":"10.1109/ISE.2002.1042996","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042996","url":null,"abstract":"The water content of polyimide film immersed in distilled water for 48 hours and dried was measured, as well as its thermal properties. The PEA method was then used to measure the space charge density after bias voltage was applied, and how the distribution changed. In measuring the water content, the longer the polyimide film dried, the more water content was lost, with hardly any change seen after 12 hours or more. In the measurement of thermal properties, the longer the polyimide film dried, the more water content it lost and the smaller the peak of thermal absorption. For the volume of space charge formed, the longer the polyimide film dried, the more difficult it became to put an electric charge into the specimen while the direct-current bias voltage was applied. This resulted in a smaller volume of space charge, which was closer to the space charge density of the specimen that was not immersed.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124715654","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}
引用次数: 12
TSDC measurements of underfill encapsulant used in microelectronic packaging 微电子封装用下填料的TSDC测量
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042946
K.C. Cheng, Z. Peng, C. S. Wong, H. Chan
{"title":"TSDC measurements of underfill encapsulant used in microelectronic packaging","authors":"K.C. Cheng, Z. Peng, C. S. Wong, H. Chan","doi":"10.1109/ISE.2002.1042946","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042946","url":null,"abstract":"The thermal stimulated depolarization current (TSDC) technique was used to study the dielectric relaxation of underfill encapsulant used in microelectronic packaging. The dependence of electrical properties of the underfill on the polarizing temperature, polarizing field and heating rate were analyzed from the TSDC spectra as a function of temperature. A single /spl alpha/-relaxation peak associated with the glass transition temperature T/sub g/ of the underfill was observed. A value of Tg can be estimated which can be compared to the T/sub g/ determined by differential scanning calorimetry (DSC). The activation energy and relaxation time of the dielectric relaxation of the underfill were determined from the TSDC measurements.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122498913","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}
引用次数: 0
Comparison of different dielectric relaxation spectroscopy for analysing cation/network interaction energies in ionic solids 不同介质弛豫谱分析离子固体中阳离子/网络相互作用能的比较
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042949
S. Devautour, J.C. Giuntini, F. Henn
{"title":"Comparison of different dielectric relaxation spectroscopy for analysing cation/network interaction energies in ionic solids","authors":"S. Devautour, J.C. Giuntini, F. Henn","doi":"10.1109/ISE.2002.1042949","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042949","url":null,"abstract":"We compare, in the case of an ionic material, the distribution of relaxation times and of energies which can be obtained from Thermally Stimulated Depolarization Current and Complex Impedance Spectroscopy under isothermal and non-isothermal conditions. It is shown that the anisothermal techniques disfavor the occurrence of the interfacial effects and, as a consequence, makes the analysis of the dielectric spectra easier and more reliable.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"52 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130852083","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}
引用次数: 0
Electrical properties of organic thin films and surface analyses of ITO substrate for organic EL device 有机电致发光器件用ITO衬底的电学特性及表面分析
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042995
S. Fujita, K. Tanaka
{"title":"Electrical properties of organic thin films and surface analyses of ITO substrate for organic EL device","authors":"S. Fujita, K. Tanaka","doi":"10.1109/ISE.2002.1042995","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042995","url":null,"abstract":"Organic electroluminescent devices are looked forward to as devices for next generation flat panel displays to replace liquid crystal and environmentally friendly light sources, and aggressive research and development on them is being conducted. As the organic electroluminescent devices have a multilayer structure depositing organic layers on ITO electrodes, it is surmised that the shape of the surface of the electrode has influences on electrical characteristics and emission characteristics of the device. In this research, in addition to observation of the shape of surface by AFM images of ITO electrodes deposited by vacuum deposition and sputtering and measurement of the state of element distribution and crystal structure, EL devices were prepared and measurement of electrical characteristics was conducted.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131112022","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}
引用次数: 0
Space charge and conduction in TiO/sub 2/ doped LDPE TiO/sub /掺杂LDPE的空间电荷与传导
Proceedings. 11th International Symposium on Electrets Pub Date : 2002-12-10 DOI: 10.1109/ISE.2002.1042961
K.R. Bambery, R. Fleming
{"title":"Space charge and conduction in TiO/sub 2/ doped LDPE","authors":"K.R. Bambery, R. Fleming","doi":"10.1109/ISE.2002.1042961","DOIUrl":"https://doi.org/10.1109/ISE.2002.1042961","url":null,"abstract":"Steady state space charge measurements were made on low density polyethylene samples, with and without TiO/sub 2/ additive. Space charge density profiles were obtained for isothermal samples and samples containing a temperature gradient. Steady state current density was also measured as a function of temperature and field; it appeared to be largely controlled by charge injection at the electrodes. Although the presence of TiO/sub 2/ additive altered the space charge density profile, no appreciable effect was observed on the conductivity or on its field and temperature dependence.","PeriodicalId":331115,"journal":{"name":"Proceedings. 11th International Symposium on Electrets","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121201818","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}
引用次数: 1
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