共查询到19条相似文献,搜索用时 62 毫秒
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本文介绍了一种具有高速消隐和可变束流的二级透镜聚焦离子束(FIB)系统的设计原理和方法。在这种新的二级透镜FIB系统中,采用了束径束流的双工作模式和一种新的电可调无级可变束径束流方案,使二级系统既可用于需要大束流的TOF─SIMS和刻蚀粗加工,又可用于需要小束径的高分辨扫描离子显微镜和刻蚀精加工以及FIB暴光、变蚀等其它微细加工。设计中提出了逐级可测试性设计原则,解决了多级系统中对中调整和测试的困难。计算了透镜系统的离子光学性能和各种参数对束径束流的影响。最后对系统进行了初步的调试,束斑达到0.1μm,得到了预期的结果。 相似文献
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电子束曝光机束斑的自动测控系统 总被引:2,自引:2,他引:0
根据亚微米电子束曝光机束斑直径、束流大小与各磁透镜电流之间的关系以及刀口法测试束斑的原理,设计了一套总线式的束斑自动测控系统。该系统以IBM—PC/AT作为主控机,系统包括用于总线扩展的总线驱动板、电子束扫描控制板和束流信号数据采集板。 相似文献
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本文介绍了稀布阵综合脉冲孔径雷达(SIAR)的实验系统,简介了SIAR发射波束形成的基本原理,并给出了该雷达目前所取得的实测数据处理结果。该结果对SIAR系统给予了原理性验证。 相似文献
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开通ISDN线路时,必须尽可能进行全面的测试。本文介绍了美国胜利电讯公司的ISDN测试仪Sunset ISDN,该仪器集基本速率接口(BRI)和基群速率接口(PRI)测试于一体,可完成ISDN BRI/PRI线路形通、维护的各项测试。 相似文献
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晓晨 《激光与光电子学进展》1999,(11)
苏格兰的VLSI影视公司开发一种先进的图像传感器和配套件ASIC(专用集成电路)。传感器将新结构和微透镜工艺结合,在200lux时得到48dB信噪比。微透镜工艺能在减小像素尺寸的同时提供较高的灵敏度。据说,352×292像素彩色图像传感器提供的图像质量可与其他同类CMOS产品竞争。传感器芯片(上)及配套的专用集成电路这种传感器直接为其专用集成电路界面设计,以形成低成本、高性能、高集成度的视频彩色相机。可得到两种输出:逐行倒相制时得到50帧/秒,625线图像;NTSC时得到60帧/秒,525线图像… 相似文献
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S. Abedrabbo D. E. Arafah O. Gokce L. S. Wielunski M. Gharaibeh O. Celik N. M. Ravindra 《Journal of Electronic Materials》2006,35(5):834-839
Ion beam mixing (IBM) has been used to process various nanostructure materials and thin films for applications in microelectronics
and optoelectronics. In this paper, a study of alloy formation of Si-Ge, processed at shallow depths followed by oxygen implantation,
is presented. The mixture is annealed to form Si-GeO2-Si, wherein the germanium oxide may form alone or as a matrix with the source of excitation. Characterization techniques
used in this study include investigations of the structural variations due to argon ion-beam irradiation by Rutherford backscattering
(RBS) and shallow defects and deep trapping level states by thermoluminescence (TL) measurements. Fourier transform infrared
(FTIR) spectroscopy is used to analyze the thin film/islands of GeO2 formed in the matrix. 相似文献
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利用镓源二级透镜聚焦离子束装置在半导体基片上进行了一系列的无掩模刻蚀实验研究,在不同材料上刻蚀了各种图形,总结分析了不同参数的聚焦离子束对刻蚀的影响。 相似文献
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We have shown that poly(para-phenylene) (PPP) can be obtained either n-type or p-type by ion implantation at low energy (E ≦ 50 keV); PPP is primarily an insulator pellet obtained from compacted powder synthetised by the Kovacic method. To compare with the chemical doping effect, we have studied the conductivity and thermopower of PPP samples after two successive ion implantations with Cs+ and I+. The experimental results show that we clearly obtain reversible doping only in the case of an initially I+-doped sample: the thermopower sign is changed after a Cs+ implantation with a fluence equal to 3 × 1014 ions cm?2. In the other case (Cs+ initial implantation) we observe the change in thermopower sign at higher fluence (2 × 1016 I+ ions cm?2). This last effect can be attributed to a metal transition induced by the accumulation of defects in the material because of too high implantation parameters (graphitisation). 相似文献
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锑化铟是一种窄禁带化合物半导体。近几年,它作为3~5μm红外探测器阵列的一种材料受到广泛的重视。为了制备高质量的锑化铟PN结光电二极管,铍注入与快速热退火(RTA)技术相结合是一种最佳的选择。本文借助俄歇电子能谱(AES)对在快速退火条件下锑化铟表层化学配比的偏离进行了系统的研究。 相似文献
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J. Kennedy A. Markwitz H. J. Trodahl B. J. Ruck S. M. Durbin W. Gao 《Journal of Electronic Materials》2007,36(4):472-482
The ion beam analysis (IBA) techniques of Rutherford backscattering spectrometry (RBS), elastic recoil detection analysis
(ERDA), nuclear reaction analysis (NRA), and particle-induced x-ray emission (PIXE) have been used to quantitatively determine
composition, uniformity, impurity, and elemental depth profiles of major, minor, and trace elements of group III-V nitride
and zinc oxide (ZnO) thin films prepared by various growth techniques. The IBA revealed that an amorphous GaN film prepared
by ion beam assisted deposition (IBAD) has large variations in film thickness and composition coupled with typically 10–20%
oxygen that was found to be essential to stabilize their amorphous structure. The IBA characterization of plasma-assisted
molecular beam epitaxy (PAMBE) grown GaN, InN, and InCrN films revealed composition, impurity, and uniformity information
of the films. The IBA of ZnO films prepared by radio frequency (RF) sputtering showed that the Zn/O ratio often varied significantly
over the film thickness. Hydrogen was found to be a major impurity in the films with around one present in the as-deposited
ZnO films. It is clearly shown that the nondestructive, quantitative, and rapid IBA measurements are very useful to develop
and optimize growth protocols in respect to film thickness, stoichiometry, and especially in regard to hydrogen and oxygen
impurities for group III-V nitride and ZnO thin films prepared by various growth techniques. 相似文献
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硫酸根离子敏感半导体器件的研究 总被引:1,自引:0,他引:1
本文报导一种基于四苯硼钠的离子敏感半导体器件。该器件的线性响应范围为 1 0×10 - 1- 1 0× 10 - 3mol/L ,斜率为 32ml/pc (13℃ ) ,检测下限为 6 0× 10 - 4mol/L。适宜的PH范围为 4 - 4 6。 相似文献
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1XZ 20/30W二代微光像增强器的设计与研制 总被引:2,自引:2,他引:0
本文分两部分论述了1XZ20/30W二代微光像增强器的设计与研制:(1)1XZ20/30W二代微光像增强器设计参数的确定原则和方法,(2)1XZ20/30W二代微光像增强器电子光学系统设计计算及性能分析。1XZ20/30W二代微光像增强器的设计,是吸取国内外同类产品的优点,结合我国的现实情况进行设计的。研制结果表明,本设计计算方法正确,结构设计合理,技术性能优越,工艺技术先进,环境试验可靠。并且零件、材料基本立足于国内,适于大批量生产,并能够与国际上同类产品10-XX1383互换使用,达到80年代国际同类产品的先进水平。 相似文献