偏光片周边精密加工关键技术研究

为满足高端TFT-LCD产品的工艺要求,必须对裁切后的偏光片周边进行精密加工.在对偏光片的结构特点和裁切机理分析的基础上,指出传统偏光片裁切加工工艺存在的不足及原因.对偏光片周边精密加工工艺及关键技术进行了较为详实的理论分析与实践总结,通过对夹紧与同步旋转机构的受力分析,论述了偏光片的最大静摩擦力矩和夹紧与同步旋转机构...     

偏光片周边的镜面磨削工艺

偏光片是液晶显示器的主要原材料之一,约占其制造成本的20%～30%,介绍了偏光片的基本结构和偏光片周边的镜面磨削工艺,该工艺是对裁切好的偏光片的周边进行精磨的工艺过程,使之达到要求的光洁度以及精确的尺寸和角度.     

偏光片磨边工艺设备的开发与研制

主要介绍了在偏光片磨边工艺设备开发和研制中,如何实现压紧和旋转的工艺过程。通过采用双导轨高刚性支撑结构和交叉滚子轴承及向心轴承的组合结构设计了上下压台,保证了偏光片在压紧的状态下,不产生上下偏移和崩塌,同时保证压台在磨削时的定位精度;采用不完全齿轮和齿条的间隙运动机构组成六轴联动机构,实现了偏光片的旋转工艺,将其与气缸定位相结合,实现了偏光片的定位;合理设计的辅助夹具,不仅便于操作,而且实现了偏光片的上下同步旋转。最后通过C型料盒设计,进一步提高了生产效率。     

TFT-LCD偏光片加工工艺与设备探索

分析了偏光片加工的特点,对如何提高偏光片产品尺寸精度和角度精度进行了工艺探讨;同时对偏光片边沿加工设备的实现提出了初步构想.     

有限元法在偏光片磨边机结构设计中的应用

通过对多工位中小尺寸偏光片磨边机的关键部件--多工位同步旋转工作台组件的结构分析,得出了该部件的设计要点是保证上下旋转机构的同轴度.而同轴度又与部件的结构尺寸、几何形状、制造精度及受力变形状况等关系密切.利用COSMOS有限元分析软件,对所设计的多工位同步旋转工作台组件进行了分析计算,得出了该部件在受力状态下的变形分布...     

斜角裁切机切边送料系统的开发与研制

介绍了在斜角裁切机切边送料系统开发与研制过程中,如何实现定长送料和纠偏的工艺过程。通过采用电机带动同步带结构和上下橡胶辊以及上下同步移动气缸相结合的传动结构设计了定长送料机构,保证了偏光片定长送料的精度。通过采用纠偏电机和纠偏控制器以及超声波传感器等设计了送料纠偏机构,保证了送料的精度,同时提高了送料的效率。     

偏光片贴合工艺设备的开发与研制

主要介绍了在偏光片贴合工艺设备的开发与研制中,如何实现整卷光学薄膜的原卷放料、保护膜收取和贴合的工艺过程。通过采用双向螺杆结构和磁粉制动器结构设计了原卷放料机构,保证了光学薄膜原卷在贴合工作过程中的定位精度,同时保证原卷放料的张力;采用压力传感器结构,设计了上下胶辊精确压合并传送偏光片的贴合机构,保证了在贴合过程中贴合成品不产生气泡和皱褶等不良现象;合理设计卷边调节机构,保证了贴合成品不会产生翘曲。     

内置型偏光片技术的研究进展

传统偏光片技术所制备的是外置型偏光片,由于其贴附于显示屏表面,使显示器的厚度增加,透光率下降.为了满足对偏光片薄型化、高透过率、低成本以及柔性显示等要求,开发内置型偏光片成为新型显示特别是柔性显示发展的一个重要方向,其中作为内置型偏光片的主流技术的光控取向和纳米压印技术,由于其无静电、无粉尘污染、更精确可控微小区多筹取...     

加热技术在半固化片裁切中的应用

针对目前半固化片裁切过程中因纯机械裁切导致的切口边缘发白分层;pp粉尘、玻璃丝纤维掉落污染环境、危害工作人员身心健康以及纯机械裁切工艺为后续工序带来的诸多麻烦和带来的缺陷,本文提出一种新的裁切方法,此种技术结合半固化片自身的特性,利用加热的原理,通过精确控制加热的温度、加热时间以及机构的动作过程使半固化片中的树脂在极短的时间内达到软化但尚未达到半固化片中玻璃纤维燃烧的温度条件下进行裁切,从而达到了半固化片裁切刃口整齐、不掉粉、不发白、不烧焦,且能够自动封边的切割效果。     

偏光片除泡工艺

偏光片作为液晶显示器的三大主要材料之一,其在液晶玻盒上的贴附质量直接影响到液晶显示器的显示效果.针对偏光片贴附后存在的气泡缺陷,阐述了偏光片除泡的重要性,分析了偏光片除泡的具体工艺、相关参数的作用和原理;同时对除泡工艺中的主要问题提出了解决方法.     

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.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

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