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2006 19th International Vacuum Nanoelectronics Conference最新文献

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Thermal Model of Miniaturized Schottky Emitter for Parallel Electron Beam Lithography 平行电子束光刻小型化肖特基发射极的热模型
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2007-03-29 DOI: 10.1116/1.2409959
A. K. Dokania, J. Velthuis, Yanxia Zhang, P. Kruit
{"title":"Thermal Model of Miniaturized Schottky Emitter for Parallel Electron Beam Lithography","authors":"A. K. Dokania, J. Velthuis, Yanxia Zhang, P. Kruit","doi":"10.1116/1.2409959","DOIUrl":"https://doi.org/10.1116/1.2409959","url":null,"abstract":"This paper investigates the possibility of creating an array of Schottky emitters for use in parallel electron beam lithography. The Schottky source consists of a tiny single crystal W wire spot-welded on a heating filament for heating up to 1800 K. By designing the dimensions of the heating filament and choosing the best material, current etc, the emitter is optimized in a such a way that the temperature at the tip could be at 1800 K, without raising the temperature in surroundings significantly. In the proposed array design, 200 Schottky emitters will be arranged within the dimension of 30 times 30 mm and each beam from a source is further split into 100 beamlets","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126744069","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
Thermal Ageing Effect of Pressure Vessel Steels 压力容器钢的热老化效应
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-12-01 DOI: 10.1109/IVNC.2006.335373
G. Sha, A. Morley, S. Hirosawa, A. Cerezo, G.D.W. Smith, D. Ellis, T. Williams
{"title":"Thermal Ageing Effect of Pressure Vessel Steels","authors":"G. Sha, A. Morley, S. Hirosawa, A. Cerezo, G.D.W. Smith, D. Ellis, T. Williams","doi":"10.1109/IVNC.2006.335373","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335373","url":null,"abstract":"Recent results on hardness and microstructure evolution of two pressure vessel steel welds with different Ni content (0.29 at% Ni and 1.66 at %) but similar high Cu content (0.4 at%) during long-term thermal ageing at three temperatures (330degC, 365degC and 405degC respectively) were reported. The high Ni content steel was observed to have a much stronger hardening effect during thermal ageing. Precipitation of Cu-rich clusters is responsible for the hardening effect observed in the two alloys. 3-dimensional atom probe has been employed to characterize quantitatively the evolution of precipitation microstructure, cluster chemistry and cluster/matrix interface segregation. The strong influence of ageing temperature and of alloy Ni content has been confirmed in this study. The higher the thermal ageing temperature, the higher the Cu concentration in the core of Cu-rich clusters. Ni, Mn and Si show segregation to the cluster/matrix interface, and this is stronger at lower ageing temperatures. The effect of temperature on cluster/matrix interface chemistry indicates that the interface segregation is a thermodynamic effect","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125042232","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
Negative Differential Conductance Observed in Electron Field Emission from Band Gap Modulated A-C Nanolayers 带隙调制A-C纳米层电子场发射中负差分电导的观察
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-12-01 DOI: 10.1109/IVNC.2006.335427
W. Tsang, S. Henley, V. Stolojan, S. Silva
{"title":"Negative Differential Conductance Observed in Electron Field Emission from Band Gap Modulated A-C Nanolayers","authors":"W. Tsang, S. Henley, V. Stolojan, S. Silva","doi":"10.1109/IVNC.2006.335427","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335427","url":null,"abstract":"The field emission properties of an amorphous carbon (a-C) based quantum well structures are investigated. The a-C nanolayers are grown by pulsed laser ablation of a graphite target on highly doped n-type (100) Si wafers. The band gap of these layers are modulated through laser fluence variation. A negative differential conductance peak at 15 V/mum (Fp) and an abrupt increase in emission current at 25 V/mum (Fs) are observed. An analysis of these anomalous properties is made","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128529961","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
Study of Copper Effect on the Early Stage of Precipitation in Al-Mg-Si-Cu Alloys 铜对Al-Mg-Si-Cu合金早期析出影响的研究
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335330
O. Cojocaru, W. Lefebvre, C. Marioara, H. Hasting, J. Walmsley, F. Danoix
{"title":"Study of Copper Effect on the Early Stage of Precipitation in Al-Mg-Si-Cu Alloys","authors":"O. Cojocaru, W. Lefebvre, C. Marioara, H. Hasting, J. Walmsley, F. Danoix","doi":"10.1109/IVNC.2006.335330","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335330","url":null,"abstract":"Summary form only given. The development of solute clusters in the 6xxx aluminum alloys has been investigated by three-dimensional atom probe (3DAP). The presence of these clusters in the aluminum matrix is known to increase the hardness of the system and different responses to mechanical testing are obtained depending on the thermal history of the alloys before artificial ageing (i.e. room storage and pre-ageing). In addition, clusters formed before natural ageing play an important role on the subsequent precipitation of metastable phases that are responsible for hardening. In this study, the influence of copper addition, room temperature storage and pre-ageing on the very early stages of phase decomposition in two Al-Mg-Si(-Cu) alloys are investigated. The development of homo- and hetero-clusters as well as the chemical affinity between solute atoms are analysed by means of the pair correlation function calculated in 3DAP reconstructions","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123717894","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
Field emission from surface-reconstructed phosphorus-doped homoepitaxial diamond (111) 表面重构掺磷同外延金刚石的场发射(111)
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335434
T. Yamada, H. Yamaguchi, Y. Kudo, K. Okano, H. Kato, S. Shikata, C. Nebel
{"title":"Field emission from surface-reconstructed phosphorus-doped homoepitaxial diamond (111)","authors":"T. Yamada, H. Yamaguchi, Y. Kudo, K. Okano, H. Kato, S. Shikata, C. Nebel","doi":"10.1109/IVNC.2006.335434","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335434","url":null,"abstract":"We report for the first time about field emission from carbon-reconstructed phosphorus-doped homoepitaxial diamond surfaces. In order to achieve surface reconstruction, annealing at 950degC for 60 min in a high vacuum system has been applied. Field emission shows the lowest threshold field for the carbon reconstructed surface of 16 V/mum, while the threshold fields for oxidized and hydrogen-terminated surface are 28 V/mum and 44 V/mum, respectively. A model is introduced to discuss these results, which takes into account effective electron affinities and tunneling of electrons from the conduction band minimum and from the donor level","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121589367","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
Microstructure of Modified Inconel 706 Superalloys - 3 Dimensional Atom-Probe and HRTEM Investigations 改性Inconel 706高温合金的显微组织-三维原子探针和HRTEM研究
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335401
N. Wanderka, V. Kindrachuk
{"title":"Microstructure of Modified Inconel 706 Superalloys - 3 Dimensional Atom-Probe and HRTEM Investigations","authors":"N. Wanderka, V. Kindrachuk","doi":"10.1109/IVNC.2006.335401","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335401","url":null,"abstract":"Inconel 706 does not fully meet the stringent requirements of the application in new steam turbines. The thermal stability of Inconel 706 is insufficient for a long term service above 700 degC, which leads to a dramatic loss of creep and tensile strength. Two methods of compositional modification were followed to optimize the microstructural stability of Inconel 706. One is by adding rhenium to the standard composition of the superalloy and second is by refining the chemistry of Inconel 706 resulting in a new alloy composition named DT 706 alloy. The main aim of this study was to investigate the complex microstructure in Inconel 706 alloy with high resolution techniques like electron microscopy (HREM) and three dimensional atom-probe (3DAP). The microchemistry around precipitates and the local structural variations involved in phase formation and transformation sequences of the fine precipitates and the co-precipitates (as small as 10 nm) were studied. The analysis was performed to understand not only the transformation sequences but also the stability of each precipitate type. Microstructures in different heat treated conditions and after long time ageing at 750degC for 750 h and 5000 h were therefore studied in Inconel 706 alloy and compared with the modified alloys. The addition of Re to Inconel 706 composition did not show the desired effect which therefore suggests that alloying with Re is not the right choice in order to stabilize the structure of Ni-Fe wrought superalloys such as Inconel 706. On the other hand, it was observed that the thermal stability of DT 706 alloy is significantly improved. Therefore, DT 706 alloy has an advantage over the Inconel 706 alloy","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128190444","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
Green/White Light Sources utilizing Nanocrystalline YAG Phosphores and MWNT Field-Emission Cathodes 利用纳米晶YAG荧光粉和MWNT场发射阴极的绿色/白色光源
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335413
P. Psuja, B. Cichy, A. Gorecka-Drzazga, W. Stręk, J. Dziuban
{"title":"Green/White Light Sources utilizing Nanocrystalline YAG Phosphores and MWNT Field-Emission Cathodes","authors":"P. Psuja, B. Cichy, A. Gorecka-Drzazga, W. Stręk, J. Dziuban","doi":"10.1109/IVNC.2006.335413","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335413","url":null,"abstract":"In the paper, a new field-emission miniature light source has been presented. Fabrication process of the nanopowdered phosphors and cleaning method of the multi-walls carbon nanotubes has been described. XRD spectrum of carbon nanotubes, cathodoluminescence spectra of nanocrystalline phosphors, and current-voltage characteristics of field emission from carbon nanotubes cathodes have been presented","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130784670","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
3D Atomic Characterization by Using Field Ion Computed Tomography 利用场离子计算机断层扫描进行三维原子表征
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335329
F. Vurpillot, F. Danoix, W. Lefebvre, B. Radiguet, B. Deconihout
{"title":"3D Atomic Characterization by Using Field Ion Computed Tomography","authors":"F. Vurpillot, F. Danoix, W. Lefebvre, B. Radiguet, B. Deconihout","doi":"10.1109/IVNC.2006.335329","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335329","url":null,"abstract":"Summary form only given. Three dimensional field ion microscopy (FIM) images have been reconstructed using successive images of a FIM movie. This capability opens a new dimension to the observation with the FIM of various crystallographic features. The resolution of the instrument is proven to be better than 0.05 nm in depth and 0.3 nm laterally in favourable cases. This enables small objects to be observed 3D. For instance, for the first time, \"Guinier-Preston\" zones were imaged in 3D in steel. Using this technique, the volume fraction of precipitates in an AlZrSc alloy was directly measured in large volume compared to 3DAP dataset. The shell like structure of these precipitates was also clearly imaged. Others examples will be presented","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128526355","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
Experiment Study on Planar-Gate Electron Source with CNT 碳纳米管平面栅电子源的实验研究
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335375
Wenhui Lu, Hang Song, Haifeng Zhao, H Zhao, Zhiming Li, Hong Jiang, Guoqing Mao, Yixin Jin
{"title":"Experiment Study on Planar-Gate Electron Source with CNT","authors":"Wenhui Lu, Hang Song, Haifeng Zhao, H Zhao, Zhiming Li, Hong Jiang, Guoqing Mao, Yixin Jin","doi":"10.1109/IVNC.2006.335375","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335375","url":null,"abstract":"Planar-gate type carbon nanotubes field emission electron sources were fabricated with special electrophoretic method. The simulation and experiment results showed electron emission from the nanotubes could be controlled effectively by the gate voltage. The easy fabrication process and simple structure will lead to the electron sources used in many practical vacuum microelectron devices","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130108108","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
Details of the 'Ring Collapse' on Schottky Electron Emitters 肖特基电子发射体“环塌缩”的细节
2006 19th International Vacuum Nanoelectronics Conference Pub Date : 2006-07-17 DOI: 10.1109/IVNC.2006.335439
M. Bronsgeest, P. Kruit
{"title":"Details of the 'Ring Collapse' on Schottky Electron Emitters","authors":"M. Bronsgeest, P. Kruit","doi":"10.1109/IVNC.2006.335439","DOIUrl":"https://doi.org/10.1109/IVNC.2006.335439","url":null,"abstract":"To gain better understanding of the shape stability of the Zr/O/W(100) Schottky electron source, the authors investigate the details of the ring collapse. The ring collapse phenomenon has been described and the shrinkage of a stack of the (100) end planes and its eventual disappearance as its W atom and the adsorbed ZrOx entities migrate away from the apex towards the shanks. The investigation of the changes of the full emission pattern in combination with SEM imaging and field simulations has revealed detailed information on shape changes taking place in the ring collapse and the origin of the associated probe current drops. They show the typical probe current profile and the typical facet current profile during a ring collapse and also a typical emission patterns characterizing each stage. In general, the duration of a ring collapse decreases with increasing temperature and decreasing extraction voltage, while the SYMMETRY increases","PeriodicalId":108834,"journal":{"name":"2006 19th International Vacuum Nanoelectronics Conference","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115700091","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
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