The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems最新文献

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Characterization and control of insulated gates for GaN power switching transistors 氮化镓功率开关晶体管绝缘栅极的特性与控制
T. Hashizume
{"title":"Characterization and control of insulated gates for GaN power switching transistors","authors":"T. Hashizume","doi":"10.1109/ASDAM.2012.6418561","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418561","url":null,"abstract":"We observed the peculiar capacitance-voltage (C-V) characteristics with two capacitance steps in the Al2O3/AlGaN/GaN samples prepared by atomic layer deposition where the interface states near the midgap or deeper in energies act as fixed charges. From the voltage shift at the reverse bias in the photo-assisted C-V curve, we estimated the interface state density distribution at the Al2O3 /AlGaN interface for the first time. The effects of the inductively coupled plasma (ICP) etching of AlGaN on the interface properties of the Al2O3/AlGaN/GaN structures were investigated. The transmission electron microscopy and X-ray photoelectron spectroscopy analyses indicated that monolayer-level roughness and disorder of the chemical bonds at the AlGaN surface caused poor C-V characteristics due to high-density interface states at the Al2O3/ICP-etched AGaN interface.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"468 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123057485","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
Influence of the MOVPE growth parameters on the properties of InGaAsN/GaAs MQW structures for solar cells application MOVPE生长参数对InGaAsN/GaAs MQW结构性能的影响
D. Radziewicz, B. Ściana, D. Pucicki, J. Serafińczuk, M. Tlaczala, M. Latkowska, M. Florovič, J. Kováč
{"title":"Influence of the MOVPE growth parameters on the properties of InGaAsN/GaAs MQW structures for solar cells application","authors":"D. Radziewicz, B. Ściana, D. Pucicki, J. Serafińczuk, M. Tlaczala, M. Latkowska, M. Florovič, J. Kováč","doi":"10.1109/ASDAM.2012.6418585","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418585","url":null,"abstract":"This work presents the epitaxial growth of undoped multiple quantum well (MQW) - 3 × In<sub>y</sub>Ga<sub>1-y</sub>As<sub>1-x</sub>N<sub>x</sub>/GaAs - structures obtained by atmospheric pressure metalorganic vapour phase epitaxy (APMOVPE). The relations between the hydrogen flow rate through the bubblers with TBHy, TMGa, TMIn and the composition of the resulting In<sub>y</sub>Ga<sub>1-y</sub>As<sub>1-x</sub>N<sub>x</sub> films were investigated. The influence of the growth temperature on the quantum well In<sub>y</sub>Ga<sub>1-y</sub>As<sub>1-x</sub>N<sub>x</sub> parameters were observed. Based upon this experiment, the technology parameters were estimated. These results were applied to the optimization of the hydrogen flow rate through the bubblers with TBHy, TMGa, TMIn and temperature for the growth of quantum well of In<sub>y</sub>Ga<sub>1-y</sub>As<sub>1-x</sub>N<sub>x</sub>.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130011193","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
2D irregular structure patterning and analysis of LED by NSOM LED二维不规则结构的NSOM成像与分析
D. Pudiš, I. Kubicová, J. Škriniarová, J. Kovač, J. Jakabovic, J. Novák, L. Suslik, S. Hascik
{"title":"2D irregular structure patterning and analysis of LED by NSOM","authors":"D. Pudiš, I. Kubicová, J. Škriniarová, J. Kovač, J. Jakabovic, J. Novák, L. Suslik, S. Hascik","doi":"10.1109/ASDAM.2012.6418576","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418576","url":null,"abstract":"This contribution presents possibilities of near-field scanning optical microscope (NSOM) in two different modes as an effective tool for semiconductor device surface patterning and for high-resolution microscopy. The illumination mode of the NSOM is used in lithography application to pattern two-dimensional irregular structure in the emitting surface of GaAs/AlGaAs-based light emitting diode (LED). The structure was patterned in the upper confinement AlGaAs layer and the enhancement of radiation from the patterned surface was proven by NSOM in collection mode.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132146090","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
Nanostructures for plasmonic solar cells and biosensing 等离子体太阳能电池的纳米结构与生物传感
C. Wu
{"title":"Nanostructures for plasmonic solar cells and biosensing","authors":"C. Wu","doi":"10.1109/ASDAM.2012.6418550","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418550","url":null,"abstract":"The key element for real-life plasmonics application depends on the fabrication of subwavelength nanostructures supporting localized surface plasmon resonance (LSPR) with mass reproducibility yet low cost. We have investigated two fabrication techniques for photovoltaic and biosensing purposes, i.e. self-assembly nanoisland and nanosphere lithography, which enable formation of relatively large area LSPR supporting arrays on transparent substrates yet without demanding for expensive manufacturing equipments.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133718007","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
Estimation of exposure parameters of chosen e-beam resists using variable shaped e-beam pattern generator 利用可变形状电子束图发生器估计选定电子束电阻的暴露参数
R. Andok, L. Matay, I. Kostic, A. Benčurová, P. Nemec, A. Konečníková, A. Ritomský
{"title":"Estimation of exposure parameters of chosen e-beam resists using variable shaped e-beam pattern generator","authors":"R. Andok, L. Matay, I. Kostic, A. Benčurová, P. Nemec, A. Konečníková, A. Ritomský","doi":"10.1109/ASDAM.2012.6418541","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418541","url":null,"abstract":"In this article we present results from lithography experiments on PMMA (positive tone), and HSQ Fox-12 and SU-8 (negative tone) resists carried out on the ZBA variable shaped e-beam pattern generators. In order to obtain the necessary information needed for the optimization of the exposure control Point Spread Function PSF, several lithography tests are mentioned. The carried out measurements and analysis of the results help us in obtaining important information about the resists and exposure processes and enable us to practically verify the suggested methods of parameters extraction for a reliable exposure model.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129636560","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: 2
Distribution of fixed oxide charge in MOS structures with ALD grown Al2O3 studied by capacitance measurements 通过电容测量研究了ALD生长Al2O3的MOS结构中固定氧化物电荷的分布
L. Válik, M. Ťapajna, F. Gucmann, J. Fedor, P. Šiffalovič, K. Frohlich
{"title":"Distribution of fixed oxide charge in MOS structures with ALD grown Al2O3 studied by capacitance measurements","authors":"L. Válik, M. Ťapajna, F. Gucmann, J. Fedor, P. Šiffalovič, K. Frohlich","doi":"10.1109/ASDAM.2012.6418526","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418526","url":null,"abstract":"We analyze the fixed oxide charge in Al<sub>2</sub>O<sub>3</sub> grown by thermal and plasma enhanced ALD at 100 and 200 °C using capacitance-voltage measurements on MOS structures with different Al<sub>2</sub>O<sub>3</sub> thickness. For both ALD techniques and deposition temperatures, Al<sub>2</sub>O<sub>3</sub> shows negative fixed oxide charge with density in the range of 2-7×10<sup>12</sup> cm<sup>-2</sup>, most likely located at the Al<sub>2</sub>O<sub>3</sub>/SiO<sub>2</sub> interface as inferred from the linear dependence of flat-band voltage on Al<sub>2</sub>O<sub>3</sub> thickness. The break-down field ranges from 4 to 8 MV/cm illustrating a high quality of the Al<sub>2</sub>O<sub>3</sub> layers. Post-deposition annealing was found to stabilize the Al<sub>2</sub>O<sub>3</sub> dielectric constant determined to be similar to 9. Control of the negative Al<sub>2</sub>O<sub>3</sub> fixed charge represents a promising way to e.g. enhance the threshold voltage shift of GaN based MOS heterostructure FETs towards normally-off operation.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132731743","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
Hydrogen silsesquioxane as a gate dielectric layer for SiC graphene FET 硅倍半氧烷氢作为SiC石墨烯场效应管的栅极介电层
J. Nahlik, M. Janoušek, Z. Šobáň, J. Voves, V. Jurka, P. Machac
{"title":"Hydrogen silsesquioxane as a gate dielectric layer for SiC graphene FET","authors":"J. Nahlik, M. Janoušek, Z. Šobáň, J. Voves, V. Jurka, P. Machac","doi":"10.1109/ASDAM.2012.6418520","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418520","url":null,"abstract":"Graphene can be prepared by annealing of SiC wafer. That allows large scale patterning by standard UV photolithography. Unfortunately SiC substrate does not allow backgating in contrast to graphene on silicon substrate (with thin silicon dioxide layer). The major challenge is to find suitable dielectric layer that can be used for electrostatic gating without significant influence on carrier mobility or another properties of graphene. We examined electrical behavior of electron exposed hydrogen silsesquioxane (HSQ) layer used as dielectric layer of topgated SiC graphene. We prepared seven sets of capacitor structures for test of HSQ layer electrical properties. The capacitors have different dimensions (100x5 - 100x100 μm) and each set had different exposure energy (12 - 480μC/cm2) and annealing process. Electrodes and contacts were prepared by evaporation of 3/30 nm thick Cr/Au layer. The influence of exposure energy to electrical properties of HSQ layer was observed. The dimension of capacitor structures had lower effect than exposure energy. The gated Hall-bar structure of SiC graphene will be prepared subsequently. Hall-bar will be defined by e-beam lithography, etched by oxygen plasma and contacted by evaporation. HSQ will be used as a gate dielectric.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132175643","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
Current instabilities and other reliability aspects in AlGaN/GaN MOS-HFETs with atomic layer deposited Al2O3 as gate oxide 原子层沉积Al2O3作为栅氧化物的AlGaN/GaN mos - hfet的电流不稳定性和其他可靠性方面
R. Stoklas, D. Gregušová, J. Novák, P. Kordos, M. Tajima, T. Hashizume
{"title":"Current instabilities and other reliability aspects in AlGaN/GaN MOS-HFETs with atomic layer deposited Al2O3 as gate oxide","authors":"R. Stoklas, D. Gregušová, J. Novák, P. Kordos, M. Tajima, T. Hashizume","doi":"10.1109/ASDAM.2012.6418560","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418560","url":null,"abstract":"An impact of the different voltage ramps (from 25mV/s to 20V/s) in off-state regime for HFET and MOS-HFET was experimentally investigated. Because of the temperature in the channel drops at low voltage steps, density of temperature-active interface states and states in the GaN buffer near the channel is reduced, and therefore the IDS,off-state decreases. A positive temperature coeficient is attended. An another behaviour for MOS-HFET for fast traps in comparison to HFET was observed. A smaller temperature-dependence of fast traps in comparison to slow traps can be responsible for this effect. The same tendency of IDS,off.state for all devices were found. The MOSHFET exhibited no change of drain current IDS,off-state for 5 hours, but for the HFET the value was more than 500 times higher.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125703262","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
Photocathode based on deuterated diamond like carbon films prepared by reactive magnetron sputtering and PECVD technology 反应磁控溅射和PECVD技术制备的氘化类金刚石薄膜光电阴极
J. Huran, N. Balalykin, M. Kadlecíková, B. Zat’ko, A. A. Feschenko, A. Kobzev, Ľ. Vančo, M. Nozdrin, A. Kleinová, E. Kováčová
{"title":"Photocathode based on deuterated diamond like carbon films prepared by reactive magnetron sputtering and PECVD technology","authors":"J. Huran, N. Balalykin, M. Kadlecíková, B. Zat’ko, A. A. Feschenko, A. Kobzev, Ľ. Vančo, M. Nozdrin, A. Kleinová, E. Kováčová","doi":"10.1109/ASDAM.2012.6418517","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418517","url":null,"abstract":"The influence of deuterated diamond like carbon films technology and properties on quantum efficiency of prepared photocathode has been investigated. Deuterated diamond like carbon films were deposited on silicon substrate and stainless steel mesh by PECVD from gas mixture CH4 and D2 and reactive magnetron sputtering using carbon target and gas mixture Ar and D2. The concentration of elements in films was determined by RBS and ERD. Chemical compositions were analyzed by FT-IR. Raman spectroscopy at visible excitation wavelength was used for I(D)/I(G) ratio determination. The quantum efficiency was calculated from the measured laser energy and the measured cathode charge.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114355751","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
Influence of layer structure on electrical properties of AlGaN/GaN HEMTs 层结构对AlGaN/GaN hemt电性能的影响
P. Benko, J. Kovác, A. Chvála, M. Florovič, P. Kordos, J. Škriniarová, L. Harmatha
{"title":"Influence of layer structure on electrical properties of AlGaN/GaN HEMTs","authors":"P. Benko, J. Kovác, A. Chvála, M. Florovič, P. Kordos, J. Škriniarová, L. Harmatha","doi":"10.1109/ASDAM.2012.6418559","DOIUrl":"https://doi.org/10.1109/ASDAM.2012.6418559","url":null,"abstract":"The C-V and I-V characteristics of the Ni/Al0.26Ga0.74N/GaN and Ni/Al0.20Ga0.80N/GaN Schottky diodes were measured for determination of structures electrical parameters as well as influence of metal-pad electrode to Schottky barrier height evaluation. From measured C-V curves, the sheet charge density of carriers in the channel was determined. The I-V characteristics were measured in the temperature range from 298 to 473 K and analyzed considering different current-transport mechanisms. The Schottky barrier height of both investigated structures with metal-pad show equal value ~1.3 eV at 298 K, while for structures without metal-pad the barrier height of the Schottky diodes was 2.23 eV and 2.02 eV for Ni/Al0.26Ga0.74N/GaN and Ni/Al0.20Gain0.80N/GaN sample, respectively. This results indicate the presence of excess oxide layer under Schottky contact at AlGaN surface during the contact processing.","PeriodicalId":426709,"journal":{"name":"The Ninth International Conference on Advanced Semiconductor Devices and Mircosystems","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124910841","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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