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ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics最新文献

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Contact resistance in PTC thermistors PTC热敏电阻中的接触电阻
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.598196
C.W. Park, K. Cho, J. Lee, H. Lee
{"title":"Contact resistance in PTC thermistors","authors":"C.W. Park, K. Cho, J. Lee, H. Lee","doi":"10.1109/ISAF.1996.598196","DOIUrl":"https://doi.org/10.1109/ISAF.1996.598196","url":null,"abstract":"The electrode resistance of semiconducting PTC BaTiO/sub 3/ ceramic was studied in same detail. Commercial In-Ag paste, In-Ga alloy, and electroless plated Ni as well as evaporated Al with and without Pt overcoat layer mere chosen as electrode. The contact resistance of electroded samples at or above room temperature was determined using both dc resistance and ac impedance measurements. The aging of contact resistance under cyclic loading from -10 to 85/spl deg/C was also monitored for the prolonged period of time. The effect of heat treatment and protective coating on the stability of Al electrode was determined. Commercial In-Ag paste showed the excellent stability against contact resistance degradation. However, the contact resistance of Al electrode during aging was strongly dependent on the annealing condition and the presence of protective layer.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"51 1","pages":"995-998 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75632112","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
High performance capacitor dielectrics from chemically prepared powders 由化学制备的粉末制成的高性能电容器电介质
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.602774
I. Burn
{"title":"High performance capacitor dielectrics from chemically prepared powders","authors":"I. Burn","doi":"10.1109/ISAF.1996.602774","DOIUrl":"https://doi.org/10.1109/ISAF.1996.602774","url":null,"abstract":"Dielectric and metal powders have been developed using chemical precipitation and coating technology to produce materials suitable for next generation multilayer ceramic capacitor technology. These materials address the issues of electrode delamination in parts with many thin dielectric layers, as well as the problem of increasing dissipation factor with decreasing layer thickness.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"230 ","pages":"397-400 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91449020","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
Experimental measurements of electro-mechanical constitutive behavior of four compositions of PZT 四种PZT组合物电-机械本构行为的实验测量
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.598174
W. A. Stoll, C. Lynch
{"title":"Experimental measurements of electro-mechanical constitutive behavior of four compositions of PZT","authors":"W. A. Stoll, C. Lynch","doi":"10.1109/ISAF.1996.598174","DOIUrl":"https://doi.org/10.1109/ISAF.1996.598174","url":null,"abstract":"Four compositions of commercially available PZT are characterized under combined stress and electric field loading. The loading consists of a series of increasing compressive stress increments alternating with a series of bipolar electric field cycles. The softest composition has the lowest Young's modulus and shows hysteresis in the electric field cycle that increases as the compressive stress is increased. A distinct yield stress associated with the onset of deformation twinning (depolarization) is evident at around 25 Mpa. After loading to 180 Mpa and unloading, there is a large residual strain. The hardest composition has a higher Young's modulus, shows little or no hysteresis in the electric field cycle until the compressive stress has been applied, has a distinct yield point at around 75 Mpa associated with the onset of deformation twinning, and after loading to 180 Mpa and unloading the non-linear strain is recovered. There is no residual strain. The two compositions that lie between the extremes display intermediate behavior.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"124 1 Suppl 1","pages":"911-914 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91045939","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
BaSrTiO/sub 3/ thin films for integrated high frequency capacitors 集成高频电容器用BaSrTiO/ sub3 /薄膜
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.602718
G. Stauf, S. Bilodeau, R. Watts
{"title":"BaSrTiO/sub 3/ thin films for integrated high frequency capacitors","authors":"G. Stauf, S. Bilodeau, R. Watts","doi":"10.1109/ISAF.1996.602718","DOIUrl":"https://doi.org/10.1109/ISAF.1996.602718","url":null,"abstract":"The complex oxide dielectric Ba/sub 1-x/Sr/sub x/TiO/sub 3/ (BST) has recently been studied intensively for DRAM applications. Another significant nearer term application for which BST may be suited is replacement of discrete capacitors now attached to advanced IC's. Specific devices include bypass, decoupling, and switched filter capacitors, often operated at high frequencies. With current SiO/sub 2/ based dielectrics such integrated capacitors may take up from 20% to 50% of the device area; use of higher dielectric constant BST could reduce this by at least a factor of 10. We will discuss properties of MOCVD-grown BST which relate to these capacitor applications, including second order dielectric nonlinearity and leakage currents at useful device operating voltages (3 V). Dielectric constant, nonlinearity and breakdown voltages are found to have a strong dependence on deposition temperature of BST films, so optimum processing conditions will depend on the end device application.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"24 1","pages":"103-106 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91428656","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: 11
The piezoelectric, pyroelectric and photoelectronic properties of PLZT Rainbow ceramics PLZT彩虹陶瓷的压电、热释电和光电性能
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.598173
G. Li, G. Haertling
{"title":"The piezoelectric, pyroelectric and photoelectronic properties of PLZT Rainbow ceramics","authors":"G. Li, G. Haertling","doi":"10.1109/ISAF.1996.598173","DOIUrl":"https://doi.org/10.1109/ISAF.1996.598173","url":null,"abstract":"The piezoelectric, pyroelectric and photoelectronic properties of PLZT Rainbow ceramics of selected compositions were investigated. It was found that the Rainbow samples had a very strong piezoelectric effect when operated in the dome mode. The piezoelectric response decreased gradually with increasing frequency before occurrence of mechanical resonances. The pyroelectric properties of the samples were slightly enhanced due to the coupling of the Rainbow's domed structure with the piezoelectric effect. The domed structure and internal stress of Rainbow ceramics had a minimal impact on their photovoltaic and photoconductive characteristics.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"33 1","pages":"907-910 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87276305","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: 5
Properties of nanocrystalline PT powder and PT/P(VDF-TrFE) 0-3 nanocomposites 纳米晶PT粉末与PT/P(VDF-TrFE) 0-3纳米复合材料的性能
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.598063
Y. Chen, H. Chan, C. Choy
{"title":"Properties of nanocrystalline PT powder and PT/P(VDF-TrFE) 0-3 nanocomposites","authors":"Y. Chen, H. Chan, C. Choy","doi":"10.1109/ISAF.1996.598063","DOIUrl":"https://doi.org/10.1109/ISAF.1996.598063","url":null,"abstract":"Nanometer-size powder of lead titanate (PT) was prepared using the sol-gel process. The PT gel was annealed at various temperatures to produce powder with different particle sizes. The structural variation of the PT powder with annealing temperatures was studied by X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential thermal analysis (DTA) and differential scanning calorimetry (DSC). The crystallite size and particle size of the PT powder were measured by XRD and a particle size analyzer, respectively. PT/P(VDF-TrFE) 0-3 composites with a PT volume fraction of 0.4 were prepared by using PT powder of size 30 nm to 270 nm. The permittivities of the composites were measured using an impedance analyzer. After poling, the piezoelectric and pyroelectric coefficients of the composites were also determined.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"9 1","pages":"619-622 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90258684","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: 5
Sensors for automatic process control of wire bonding 用于自动焊线过程控制的传感器
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.598195
S. Or, H. Chan, V. Lo, C. W. Yuen
{"title":"Sensors for automatic process control of wire bonding","authors":"S. Or, H. Chan, V. Lo, C. W. Yuen","doi":"10.1109/ISAF.1996.598195","DOIUrl":"https://doi.org/10.1109/ISAF.1996.598195","url":null,"abstract":"PZT sensors were installed on an ultrasonic transducer used for wire bonding in order to record ultrasonic amplitude and bonding time during the bonding process. To find an appropriate location for the sensor placement, the vibration displacement distributions of the transducer were measured using a high frequency heterodyne interferometer. The non-linear signal detected by the PZT sensor was processed and the signatures of the higher frequency harmonics were recorded and related to the bonding quality. The change in harmonic contents and its relation with bond quality will be used to develop a real-time automatic process control system for wire bonding.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"52 1","pages":"991-994 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90671283","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
Co-fired piezoelectric multilayer transformers 共烧压电多层变压器
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.602730
J. D. de Vries, P. Jedeloo, R. Porath
{"title":"Co-fired piezoelectric multilayer transformers","authors":"J. D. de Vries, P. Jedeloo, R. Porath","doi":"10.1109/ISAF.1996.602730","DOIUrl":"https://doi.org/10.1109/ISAF.1996.602730","url":null,"abstract":"The advantages of multilayer piezoelectric transformers (MLTs) over wire-wound types are described. The applicability of MLTs is shown for LCD-backlight, including the voltage transformation and the power characteristics. Attention is paid to modelling and designing of these products.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"5 1","pages":"173-176 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82457750","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: 15
Processing and structure-property relationships for fine grained PZT ceramics 细晶PZT陶瓷的加工与结构性能关系
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.598172
W. Hackenberger, N. Kim, C. Randall, W. Cao, T. Shrout, D.P. Pickrell
{"title":"Processing and structure-property relationships for fine grained PZT ceramics","authors":"W. Hackenberger, N. Kim, C. Randall, W. Cao, T. Shrout, D.P. Pickrell","doi":"10.1109/ISAF.1996.598172","DOIUrl":"https://doi.org/10.1109/ISAF.1996.598172","url":null,"abstract":"Submicron grain sized PZT-5A ceramics have been produced with properties comparable to conventional coarse grained material. The degradation in dielectric and piezoelectric properties with decreasing grain size was compensated with a new dopant strategy. This made the materials piezoelectrically softer compensating for reductions in poling efficiency. The submicron grain sized material has been shown to be superior to coarse grained ceramic during fine scale dicing operations.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"46 1","pages":"903-906 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84562224","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: 10
Recent developments in 1-3 piezocomposite transducer fabrication 1-3压电复合材料传感器制造的最新进展
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics Pub Date : 1996-08-18 DOI: 10.1109/ISAF.1996.602806
D. Fiore, R. Gentilman, H. Pham, W. Serwatka, P. McGuire, L. Bowen
{"title":"Recent developments in 1-3 piezocomposite transducer fabrication","authors":"D. Fiore, R. Gentilman, H. Pham, W. Serwatka, P. McGuire, L. Bowen","doi":"10.1109/ISAF.1996.602806","DOIUrl":"https://doi.org/10.1109/ISAF.1996.602806","url":null,"abstract":"Several advances in the fabrication of 1-3 piezocomposite transducers have recently been achieved at MSI. SonoPanel/sup TM/ transducers with different PZT formulations, varying ceramic volume fractions, and alternate polymer matrices have been developed to meet the requirements for various underwater applications. Transducers have performed well as both sensors and transmitters under hydrostatic pressures up to 6.9 MPa, have survived multiple explosive shocks, and were made to conform to nonplanar surfaces, piezocomposite smart panels, capable of both sensing and actuation for active surface control, are also being developed. The panels utilize monolithic sensor elements built into a 1-3 composite actuator panel. The sensors are net-shape formed, low profile accelerometers uniformly distributed across the panel area. Prototype smart panels have been assembled and are being evaluated.","PeriodicalId":14772,"journal":{"name":"ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics","volume":"89 1","pages":"531-534 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1996-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83869168","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
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