2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)最新文献

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Implementation of a subwavelength Bragg reflector for Terahertz applications 用于太赫兹应用的亚波长布拉格反射器的实现
Vikas Singal, S. Smaili, Y. Massoud
{"title":"Implementation of a subwavelength Bragg reflector for Terahertz applications","authors":"Vikas Singal, S. Smaili, Y. Massoud","doi":"10.1109/NEMS.2012.6196824","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196824","url":null,"abstract":"In recent years, the usage of the Terahertz (THz) portion of the electromagnetic spectrum has been investigated in the field of communications, medicine and biology. The evaluation of the THz wave performance in the applications requires supportive THz based devices such as emitter, detectors and filters. The efficient integration of the THz devices with the state of the art silicon based devices is limited by its typical diffraction limit (millimeters). In this abstract, a subwavelength Surface Plasmon Polaritons (SPPs) based Bragg reflector is using Indium antimonide (InSb), Silicon-dioxide (SiO2) and Porous-SiO2, is proposed. The SPPs based wave propagation at THz allows the nanoscale realization of the THz based devices. The proposed plasmonic Bragg reflector utilizes the periodic changes of the dielectric material in the core layer, while InSb is used in the cladding layer. Finite Element Method (FEM) based simulations are used to demonstrate the working of the proposed subwavelength Bragg reflector.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129726032","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
Metal contact printing photolithography for fabricating sub-micrometer patterned sapphire substrates in light-emitting diodes 在发光二极管中制造亚微米图案蓝宝石衬底的金属接触印刷光刻技术
Y. Hsieh, Y. Lee
{"title":"Metal contact printing photolithography for fabricating sub-micrometer patterned sapphire substrates in light-emitting diodes","authors":"Y. Hsieh, Y. Lee","doi":"10.1109/NEMS.2012.6196718","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196718","url":null,"abstract":"This paper reports a novel process which is combine the contact metal transfer method and traditional photolithography process for fabricate nano-scale pattern sapphire substrate (NPSS) used in high brightness light emitting diodes (LEDs). The novel process can directly transfer a metal pattern onto the PR layer which above the sapphire substrate, the transferred metal pattern can as a perfect photo-mask for subsequent photolithography process. In this work, the high aspect ratio PR structures with the aspect ratio of 5 and line width of 500 nm are created by this novel process. Furthermore, the PR structure can as a etching mask for inductively coupled plasma (ICP) etching on the sapphire substrate. During the ICP etching, we successfully to obtain the NPSS with a perfect cone shape. Experiments have been demonstrate the feasibility of using this new approach for obtaining sub-micrometer surface structures on the complete surface area of a 2 inch and 4 inch sapphire substrates.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128521312","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
Analysis of air damping in micromachined resonators 微机械谐振器中的空气阻尼分析
Guoqiang Wu, Dehui Xu, B. Xiong, Y. Ma, Yuelin Wang, E. Jing
{"title":"Analysis of air damping in micromachined resonators","authors":"Guoqiang Wu, Dehui Xu, B. Xiong, Y. Ma, Yuelin Wang, E. Jing","doi":"10.1109/NEMS.2012.6196819","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196819","url":null,"abstract":"An approach to the modeling and simulating the air damping effect on quality factor (Q) of a square plate Lamé mode microresonator is presented in this paper. Both the squeeze film damping and slide film damping are considered in the analysis procedure. The Reynolds equation and the Stoke-flow model are used to investigate the reactions of the resonant plate with the air flows in the transduction gaps and around the resonator plate surfaces, respectively. An electrical equivalent model has been derived for a microresonator operating in air. The model is realized with resistors equivalent for the slide film damping force and frequency-dependent resistors and capacitances connected in series equivalent for the squeeze film damping force. The simulated transmission characteristics are in good agreement with the experimental results for a 4.13 MHz Lamé mode microresonator.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130201959","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
Benchmarking the passive differential input technique to shielded GSG probes 屏蔽式GSG探头无源差分输入技术的基准测试
Yuanjie Xu, Haoshen Zhu, Joshua E-Y Lee
{"title":"Benchmarking the passive differential input technique to shielded GSG probes","authors":"Yuanjie Xu, Haoshen Zhu, Joshua E-Y Lee","doi":"10.1109/NEMS.2012.6196820","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196820","url":null,"abstract":"We have previously showed that feedthrough in MEMS resonators of generic mode shapes can be suppressed by as much as close to 40dB by applying a passive differential input technique. This paper compares the degree of feedthrough suppression achieved via the passive differential input technique against electrical measurements carried out using shielded GSG microwave probes. The shielded GSG microwave probes in themselves provide for excellent isolation between the input and output ports. The device under test was a square-extensional (SE) mode micromechanical resonator probed at 4 electrodes for actuation. Our results show, that despite as simple an implementation as it presents, the passive differential input technique offers additional 20dB suppression relative to the GSG probes.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132075018","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
In situ heating to improve adhesion for parylene-on-parylene deposition 原位加热以提高聚苯乙烯对聚苯乙烯沉积的附着力
D. Kang, Jay Han-Chieh Chang, J. Kim, Y. Tai
{"title":"In situ heating to improve adhesion for parylene-on-parylene deposition","authors":"D. Kang, Jay Han-Chieh Chang, J. Kim, Y. Tai","doi":"10.1109/NEMS.2012.6196762","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196762","url":null,"abstract":"A new technique of using “in-situ heating” to enhance adhesion for parylene-on-parylene deposition is reported in this paper. This method is compared with existing physical or chemical adhesion-enhancing methods and the results show clear advantages of this new technique. The physics is believed to be that the mobility of deposition-involved molecules (including the substrate parylene polymer chains and adsorbed monomers during deposition) is enhanced when deposition temperature rises, especially above the glass transition temperature of the substrate parylene. Each sample is patterned and then soaked in 0.9% saline at 90°C, and the undercut between two parylene layers due to the attack from saline during the soaking test could be observed. The undercut rate is measured to quantify the adhesion strength.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"492 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123155517","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
Conductive micro silver wires via aerosol deposition 通过气溶胶沉积的导电微银线
Bulei Xu, Wenlong Lv, Xiang Wang, T. Lei, G. Zheng, Yang Zhao, Daoheng Sun
{"title":"Conductive micro silver wires via aerosol deposition","authors":"Bulei Xu, Wenlong Lv, Xiang Wang, T. Lei, G. Zheng, Yang Zhao, Daoheng Sun","doi":"10.1109/NEMS.2012.6196775","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196775","url":null,"abstract":"A novel non-contact micro manufacturing technology of aerosol deposition is presented to fabricate conductive micro silver wires with width of several micrometers from silver inks. The ceramic nozzle with inner diameter of 250 μm is utilized to print the micro silver wires, the width of wires ranges from 15 μm to 70 μm and the thickness ranges from 200 nm to 2 μm. The printed silver wires are cured to decrease the resistance. High curing temperature and long curing time result in better conductivity of deposited wires due to the sufficient melt and combine of sliver particles. The minimum resistivity of 3.32 μΩ·cm is demonstrated for a continuous track cured at 300°C.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126584933","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
In-vitro transgenic mice liver tissue culture via hydrodynamic flow perfusion bioreactor 水动力流灌注生物反应器体外培养转基因小鼠肝组织
Che-Wei Wu, S. Sivashankar, S. Puttaswamy, Hui-Ling Lin, Kuo-Wei Chang, C. Yeh, Cheng-Hsien Liu
{"title":"In-vitro transgenic mice liver tissue culture via hydrodynamic flow perfusion bioreactor","authors":"Che-Wei Wu, S. Sivashankar, S. Puttaswamy, Hui-Ling Lin, Kuo-Wei Chang, C. Yeh, Cheng-Hsien Liu","doi":"10.1109/NEMS.2012.6196740","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196740","url":null,"abstract":"We report a Poly methyl methacrylate (PMMA) bioreactor in which hepatitis B virus (HBV) infected transgenic mice liver tissue has been cultured for long term with the continuous flow of culture medium, surrounded by mesothelial cells to provide 3-dimensional culturing conditions with adequate nutrient exchange. PDMS membrane was fabricated and a layer of mesothelial cells were cultured on it. Further this membrane was deformed and positioned on the microchannel by suction through the holes at the bottom of the channel. Liver tissue of transgenic mice was introduced on PDMS membrane. The experimental results proved that the proposed bioreactor portrays the in-vivo conditions better, with substantial improvement of liver-specific functions such as sufficient antigen expression, better structural integrity when compared to conventional static culture method. The in-vitro culture period of sliced liver tissue in our bioreactor was extended for 9 days to facilitate drug screening applications.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121008386","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
Integration the back-side inclined exposure technology to fabricate the 45° k-type prism with nanometer roughness 结合背面倾斜曝光技术制备45°k型纳米粗糙度棱镜
K. Hung, Y. Tsai, Chun-Fu Lee, Yi-Hao Chu
{"title":"Integration the back-side inclined exposure technology to fabricate the 45° k-type prism with nanometer roughness","authors":"K. Hung, Y. Tsai, Chun-Fu Lee, Yi-Hao Chu","doi":"10.1109/NEMS.2012.6196737","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196737","url":null,"abstract":"This paper describes the design for a special k-type microprism structure for application in the lateral-type blu-ray semiconductor laser of an optical pickup head system. This design solves the current frontal type blu-ray semiconductor laser problem, and thus reduces the size of the optical pickup head. This study combines front- and back- inclined exposure technology to develop a k-type microprism structure. Thick film negative photoresist are used in this study as the main structural material. For obtaining the optimal structural surface roughness, the effect of solvent loss percentage of the polymer material was controlled. Besides, the bottom half of the k-type was generated through backside exposure to solve problems such as diffraction phenomena due to uneven photoresist surface during front-side inclined exposure. This design also avoids the problem of refractive index matching by omitting the step of filling the gap between the mask and the photo resistor with glycerol. For improving the roughness problem of the front-side inclined exposure, backside inclined exposure is implemented when fabricating a 45 ° polymer micro mirror. The use of front-side exposure for making the top half of the k-type solves the problem of undesirable surface roughness caused by insufficient light penetration during front-side inclined exposure. This paper utilizes front- and back-side inclined exposure technology to fabricate a 45 ° k-type polymer micro mirror with 15.2 and 12.4 nm (400 μm × 400 μm) roughness, respectively. The roughness level could meet the standards (λ/10, λ = 405 nm) of blue ray specifications. This type of micro prism can be used as a key component in Pico-projector, Interferometer, bio detection systems, data storage systems, and linear encoder optical systems. This novel technology also has the characteristics of high throughput and wafer-level assembly.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116708779","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
A research of the bandwidth of a mode-matching MEMS vibratory gyroscope 模式匹配MEMS振动陀螺仪的带宽研究
Chunhua He, Qiancheng Zhao, J. Cui, Zhenchuan Yang, G. Yan
{"title":"A research of the bandwidth of a mode-matching MEMS vibratory gyroscope","authors":"Chunhua He, Qiancheng Zhao, J. Cui, Zhenchuan Yang, G. Yan","doi":"10.1109/NEMS.2012.6196880","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196880","url":null,"abstract":"A novel electrostatic force feedback approach is presented for extending the bandwidth of a mode-matching vibratory microgyroscope. A 0.02 Hz mode-mismatch gyroscope is achieved by applying a DC voltage of 26 V to the squeeze-film combs to adjust the stiffness of the sense mode. Sweep-frequency tests demonstrate that the open loop frequency response is close to a one-order system with a bandwidth of 7.9 Hz, which agrees well with the theoretical simulation. Moreover, both experiment and simulation results show that the bandwidth can be extended to about 94Hz from 7.9Hz after adopting an electrostatic force feedback control.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121744171","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: 8
Development of microfabricated phononic crystal resonators based on two-dimensional silicon slab 基于二维硅板的微加工声子晶体谐振器的研制
Nan Wang, F. Hsiao, M. Palaniapan, Chengkuo Lee
{"title":"Development of microfabricated phononic crystal resonators based on two-dimensional silicon slab","authors":"Nan Wang, F. Hsiao, M. Palaniapan, Chengkuo Lee","doi":"10.1109/NEMS.2012.6196785","DOIUrl":"https://doi.org/10.1109/NEMS.2012.6196785","url":null,"abstract":"This paper shows the design, fabrication and characterization of novel micromechanical resonators with Bloch-mode resonance by creating defects on a two-dimensional (2-D) silicon phononic crystal (PnC) slab. The PnC slab was made by etching a square array of cylindrical air holes in a 10 μm thick free-standing silicon plate, while the defects are created by replacing periodically arranged three rows of air holes with one row of air holes at the centre of the PnC region. The radius of the central air holes (r') is also varied to study the effect of r' on the performance of the PnC resonators. Piezoelectric aluminium nitride (AlN) film is employed as the inter-digital transducers (IDT) to transmit and detect acoustic waves, thus making the whole microfabrication process CMOS-compatible. We also fabricate a pure PnC structure with a stopband of 140 MHz <; f <;195 MHz which agrees quite well with the simulation results. The characterized resonant frequency of microfabricated PnC resonators reaches its maximum value (174.67 MHz) when central-hole radius (r') reaches 8 μm, while Q factor reaches maximum (893) at r' = 6 μm. The Bloch-mode PnC resonators based on square lattice PnC structure show promising acoustic resonance characteristics and may be further optimized for applications such as microfluidics, biomedical devices and RF communications in GHz range.","PeriodicalId":156839,"journal":{"name":"2012 7th IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS)","volume":"66 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133675868","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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