电加热板温度控制的仿真分析

光刻胶的前烘与坚膜是微机械加工工艺中不可缺少的两道工序，用于光刻胶烘干的热板对表面温度场分布的均匀性和温度控制稳定性均有较严格的要求，本文描述了利用有限元软件对加热板的稳态温度场，瞬态响应进行了分析，获得其最佳温度场分布，从而建立数学模型；然后利用MATLAB软件对PID控制仿真，以分析电加热板对温度的稳定性与均匀性的影响。     

X射线光刻和剥离技术制作声表面波叉指换能器

提供了采用电子束光刻、X射线光刻和金属剥离技术制作亚微米尺寸的声表面波叉指换能器的方法.首先利用电子束光刻和微电镀技术制作x射线光刻的掩模,然后利用X射线光刻和剥离技术高效地制作大面积、纳米尺电、电极陡直均匀的叉指换能器.制备出的叉指电极特征尺寸为600 nm,面积为4 mm×6 mm,断指率小于3‰,可应用于高频声表面波器件中.研究结果表明,X射线光刻结合剥离技术是一种制备高频SAW器件的优良方法.     

深亚微米同步辐射x射线光刻模拟

用束衍生法研究了深亚微米同步辐射 x射线光刻中掩模吸收体的光导波效应 ,并对 x射线光刻后的光刻胶剖面进行了理论计算。采用面向对象技术 ,研制了一个取名为 XLLS1 .0的模拟软件。本文对这个软件进行了详细介绍     

深亚微米同步辐射x射线光刻模拟

用束衍生法研究了深亚微米同步辐射x射线光刻中掩模吸收体的光导波效应,并对x射线光刻后的光刻胶剖面进行了理论计算。采用面向对象技术,研制了一个取名为XLLS1.0的模拟软件。本文对这个软件进行了详细介绍。     

高高宽比硬X射线聚焦波带片的制作

相对于软X射线显微成像,硬X射线显微成像对菲涅尔波带片的吸收体厚度提出了更高的要求.采用电子束光刻和X射线光刻复制的方法,在聚酰亚胺薄膜上成功制作了高高宽比的菲涅尔波带片.首先利用电子束光刻和微电镀技术制作了X射线光刻的掩模,然后利用X射线光刻和微电镀制作了高高宽比、线条侧壁陡直的菲涅尔波带片.复制后的波带片最外环宽度500 nm,直径1 mm,吸收体金厚度为3.6μm,高宽比达到7.2,可用于10 keV～25 keV的硬X射线成像.     

第二代接近式X射线光刻技术

介绍了第二代PXL的原理和影响光刻分辨率的关键因素,当第二代PXL工艺因子为0.8时,对于50 nm及35 nm节点分辨率,掩模与硅片的间距可以分别达到10μm和5μm,表明第二代PXL具有很大的工艺宽容度;分析了纳米X射线掩模的具体结构、制作工艺和成本,相对于其竞争对手,在100 nm节点及其以下,X射线掩模的制造难度和成本是比较低的,而且随着电子束直写X射线掩模能力的进一步提高,X射线掩模更具优势;对几种常用的X射线光刻胶性能进行了分析,高性能的X射线光刻胶的研发不会成为PXL发展的障碍;对步进光刻机和X射线光源进行了论述,X射线点光源的研究进展对于第二代PXL的发展至关重要;最后介绍了第二代接近式X射线光刻的研究现状,尽管PXL的工业基础比起其它下一代光刻来说要好得多,但是比起光学光刻还差得很远,第二代PXL是否真正为硅基超大规模集成电路生产所接受目前还不得而知。     

深亚微米X射线光刻模拟软件XLSS 1.0

介绍了一套自行研制的深亚微米同步辐射X射线光刻模拟软件--XLSS 1.0.该软件基于面向对象技术,采用束衍生法及快速傅里叶变换相结合的方法来研究X射线掩模中吸收体的光导波效应,对光刻胶表面空间光强分布及光刻胶剖面进行了精确模拟计算,发现模拟结果与实验结果吻合很好,且模拟结果的特征尺寸宽度与实验结果的特征尺寸宽度误差小于±10%.     

高线密度X射线透射光栅的制作工艺

采用电子束光刻、X射线光刻和微电镀技术,成功制作了面积为10mm×0.5 mm,周期为500nm,占空比为1∶1,金吸收体厚度为430nm的可用于X射线衍射的大面积透射光栅.首先利用电子束光刻和微电镀技术制备基于镂空薄膜结构的X射线光刻掩模,然后利用X射线光刻经济、高效地复制X射线透射光栅.整个工艺流程分别利用了电子束光刻分辨率高和X射线光刻效率高的优点,并且可以得到剖面陡直的纳米级光栅线条.最后,测量了制作出的X射线透射光栅对波长为11nm同步辐射光的衍射峰,实验结果表明该光栅具有良好的衍射特性.     

电子束光刻制备5000line/mm光栅掩模关键技术研究

为了制备高线密度X射线透射光栅掩模,分析了电子束光刻中场拼接对高线密度光栅图形的影响;利用几何校正技术和低灵敏度的950 k的PMMA电子束抗蚀剂,克服了电子束的邻近效应对厚胶图形曝光的影响.采用电子束光刻和微电镀的方法制备了5 000line/mm x射线透射光栅的掩模,并将栅线宽度精确控制在100 nm～110 nm,为X射线光刻复制高线密度X射线透射光栅创造了有利条件.     

高线密度X射线透射光栅的制作工艺

采用电子束光刻、X射线光刻和微电镀技术,成功制作了面积为10mm×0.5 mm,周期为500nm,占空比为1∶1,金吸收体厚度为430nm的可用于X射线衍射的大面积透射光栅.首先利用电子束光刻和微电镀技术制备基于镂空薄膜结构的X射线光刻掩模,然后利用X射线光刻经济、高效地复制X射线透射光栅.整个工艺流程分别利用了电子束光刻分辨率高和X射线光刻效率高的优点,并且可以得到剖面陡直的纳米级光栅线条.最后,测量了制作出的X射线透射光栅对波长为11nm同步辐射光的衍射峰,实验结果表明该光栅具有良好的衍射特性.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first