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采用有机改性硅酸盐制备了光敏性溶胶-凝胶,并应用四丙氧基锆作为调节折射率的材料.为了增加薄膜与硅片的粘附作用,先用干氧热氧化法在硅片上生长一层厚度约为150nm的SiO2,然后使用提拉法在硅片上提拉成膜,薄膜厚度达到3.6μm.研究发现紫外曝光时间和坚膜时的后烘温度都会使薄膜的折射率增大.样品的原子力显微镜照片表明薄膜的表面非常平整,在5μm×5μm的范围内表面起伏只有0.657nm.利用波导阵列掩膜版,对制备的薄膜在紫外光波段下曝光,得到了表面平坦、侧墙光滑、陡直的沟道波导阵列. 相似文献
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采用有机改性硅酸盐制备了光敏性溶胶 凝胶 ,并应用四丙氧基锆作为调节折射率的材料 .为了增加薄膜与硅片的粘附作用 ,先用干氧热氧化法在硅片上生长一层厚度约为 15 0nm的SiO2 ,然后使用提拉法在硅片上提拉成膜 ,薄膜厚度达到 3 6 μm .研究发现紫外曝光时间和坚膜时的后烘温度都会使薄膜的折射率增大 .样品的原子力显微镜照片表明薄膜的表面非常平整 ,在 5 μm× 5 μm的范围内表面起伏只有 0 6 5 7nm .利用波导阵列掩膜版 ,对制备的薄膜在紫外光波段下曝光 ,得到了表面平坦、侧墙光滑、陡直的沟道波导阵列 . 相似文献
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sol-gel法制备多孔纳米SiO2薄膜 总被引:3,自引:0,他引:3
以 NH_3·H_2O 为催化剂,用正硅酸乙酯(TEOS)溶胶–凝胶工艺制备纳米多孔二氧化硅薄膜。强碱催化使二氧化硅胶粒溶解度增大并增大了体系的离子强度;丙三醇的加入,与水解中间体结合,有效抑制了二氧化硅溶胶胶粒的长大;PVA(聚乙烯醇)对二氧化硅胶粒有强的吸附作用,使胶粒聚联成大的网络结构,增加了成膜性能。通过改变反应物的剂量,调节添加剂的用量,可以制得折射率 1.18~1.42,对应孔率 60.50%~7.75%并且孔径小于 100 nm 的纳米多孔二氧化硅薄膜,。单层薄膜厚度在 3 μm 以内精确可控。 相似文献
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通过脉冲激光沉积(PLD)法在Si(111)和SiO2玻璃基片上制备了PbSe薄膜。X射线衍射、X射线能谱、原子力显微镜、傅里叶变换红外光谱仪测试结果表明:所有制备的薄膜都为多晶薄膜,发现薄膜生长温度对薄膜衍射峰有一定影响;PLD法制备的薄膜的成分与靶材的基本一致,实现了同组分沉积;所有薄膜表面比较平滑,表面不平整度小于200nm,结构比较致密;PbSe薄膜对红外光具有敏感的响应特性;在波长为5μm处存在有明显的吸收边,此吸收边对应于直接带隙PbSe材料的禁带宽度;对应于波长小于5μm的红外光,PbSe薄膜存在有明显的强吸收。 相似文献
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《红外与毫米波学报》2017,(4)
纳米级金属薄膜能够作为热释电探测器红外吸收薄膜在14~16μm波段范围内有效应用已经得到证明.通过调节沉积在LT(钽酸锂)晶体材料上的纳米级镍铬(NiCr)薄膜的厚度和表面特征来改善纳米金属薄膜红外吸收特性.通过调节晶体材料的厚度,改变抗反射腔的深度,从而调节吸收波长.为进一步加强红外吸收,应用化学腐蚀,生成粗糙的纳米级薄膜表面结构,从而极大程度上增加吸收表面积.通过将这两种方法结合,可以明显增强指定波段的红外吸收,且其制造过程完全兼容,易于实现.可控的吸收性能的实验结果与仿真和设计情况相符合. 相似文献
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基于MEMS的硅基PZT薄膜微力传感芯片 总被引:3,自引:0,他引:3
为了测量毫克级的微小力,设计并制造了一种硅基PZT薄膜悬臂式微力传感芯片。采用溶胶-凝胶(Sol-Gel)方法在Pt/Ti/SiO2/Si衬底上成功制备了厚度不同(300~800 nm)的锆钛酸铅(Pb(ZrxTi1-x)O3)薄膜,薄膜表面均匀,无裂纹。通过测试和分析,研究了PZT薄膜的制备工艺参数和压电、铁电、阻抗特性。采用微机械加工手段制作了长度为1 000μm、500μm、250μm的硅基PZT薄膜微型悬臂结构。当在悬臂的自由端沿着厚度方向施加毫克级的微小力时,微型悬臂就会在厚度方向发生弯曲和振动,通过测量在压电材料表面电极上的电荷量,并通过计算可得到微型悬臂所受的集中力的大小,实现微力的测量。该文还对微力传感芯片的工作方式进行了研究,初步设计了传感器系统模型。 相似文献
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聚合物光波导放大器材料的光学参数及器件制备 总被引:2,自引:1,他引:1
使用甲基丙烯酸甲酯(MMA)和甲基丙稀酸环氧丙酯(GMA)共聚,并加入双酚A环氧脂(bis-phenol-A-epoxy)来调节折射率,制备了无源波导材料.使用铒的配合物ErYb(DBM) 2M和MMA、GMA共聚,再加入双酚A环氧树脂调节折射率,制备了用于光波导放大器有源波导料使用椭偏仪对无源和有源的聚合物薄膜的折射率、消光系数和厚度进行了测量.无源的聚物折射率随着环氧树脂含量的增加而线性增加.铒的配合物共聚进聚合物基质中使1.55 μm波段折射率和消光系数增加.无源和有源波导材料的折射率可调节范围在大约在1.48~1.53厚度可调节范围大约在1~6 μm.用有源聚合物材料作芯层、无源聚合物材料作包层,制备了1.55 μm单模有源波导,并得到了圆形的近场光斑. 相似文献
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采用分子束外延( MBE)方法在蓝宝石衬底上外延生长m面GaN薄膜。利用原子力显微镜( AFM)、扫描电子显微镜( SEM)分析薄膜表面形貌,发现Ⅴ/Ⅲ族元素比从1∶80降低到1∶90时,外延膜表面均方根粗糙度从13.08 nm降低到9.07 nm。利用光谱型椭偏仪研究m面GaN薄膜,得到了m面GaN薄膜的厚度、折射率和消光系数。拟合结果显示,GaN样品厚度和理论值一致,且Ⅴ/Ⅲ族元素比为1∶90时,所得外延膜折射率较低,透射率大。两种测试方法表明,Ⅴ/Ⅲ族元素比较小的样品晶体质量高。 相似文献
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Meihua Shen Wilfred Pau Nicolas Gani Jianping Wen Shashank Deshmukh Thorsten Lill Jian Zhang Hanming Wu Guqing Xing 《半导体技术》2004,29(8)
This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration. 相似文献
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White organic light-emitting devices based on fac tris(2- phenylpyridine) iridium sensitized 5,6,11,12-tetraphenylnap -hthacene 总被引:1,自引:0,他引:1
We have fabricated the white organic light-emitting devices (WOLEDs) based on 4,4' -bis(2,2 -diphenyl vinyl)-1,1' - biphenyl (DPVBi) and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene (rubrene). The device structure is ITO/2T-NATA (20 nm)/NPBX (20 nm)/CBP: x%Ir(ppy)3:0.5% rubrene (8 nm)/NPBX (5 nm)/DPVBi (30 nm)/Alq(30 nm)/LiF(0.5 nm)/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir(ppy)3], acts as a yellow light-emitting layer, and N,N' -bis- (1-naphthyl)- N,N' -diphenyl -1, 1' -biphenyl-4,4' -diamine (NPBX) acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir (PPY)3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V. 相似文献
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Complete approach to automatic identification and subpixel center location for ellipse feature 总被引:1,自引:0,他引:1
XUE Ting WU Bin SUN Mei YE Sheng-hua 《光电子快报》2008,4(1):51-54
To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction. 相似文献
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Credence Systems Corporation 《半导体技术》2004,29(9)
Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V. 相似文献
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It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer (LDV). 相似文献
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正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must 相似文献
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Zhang Xinsheng 《中国通信》2014,(1)
正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta- 相似文献
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正Cloud computing is a novel computing paradigm that utilizes remote cloud resources to achieve a high-performance computation.Cloud provides infrastructure,platform and software as different on-demand services.China has made remarkable progress in cloudbased products and operating system technology.The government,enterprises and research institutions are all active in the development of cloud computing-related projects.Despite the progress,many important problems 相似文献
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