并五苯场效应管的电学特性

介绍了用高真空中热蒸发镀膜的方法制备并五苯薄膜场效应晶体管. 作为场效应管半导体层的并五苯薄膜沉积在p型Si (100) (14.0～20.0Ω·cm）衬底上. 场效应管中并五苯薄膜厚度为70nm，源极、漏极和栅极（Au）的厚度均为50nm，绝缘层SiO2的厚度为300nm，沟道宽度为190μm，沟道长度为15μm. 用AFM表征了并五苯薄膜表面形貌，并研究了薄膜生长速率对并五苯场效应晶体管电学特性的影响. 在薄膜生长速率为024和136nm/min时，场效应管的载流子迁移率分别为2.7E-4和2.2E-6cm2／(V·s) .     

并五苯场效应管的电学特性

介绍了用高真空中热蒸发镀膜的方法制备并五苯薄膜场效应晶体管.作为场效应管半导体层的并五苯薄膜沉积在p型Si(100)(14.0～20.0 Ω·cm)衬底上.场效应管中并五苯薄膜厚度为70nm,源极、漏极和栅极(Au)的厚度均为50nm,绝缘层SiO2的厚度为300nm,沟道宽度为190μm,沟道长度为15μm.用AFM表征了并五苯薄膜表面形貌,并研究了薄膜生长速率对并五苯场效应晶体管电学特性的影响.在薄膜生长速率为0.24和1.36 nm/min时,场效应管的载流子迁移率分别为2.7×10-4和2.2×10-6 cm2/(V·s).     

并五苯场效应管的电学特性

介绍了用高真空中热蒸发镀膜的方法制备并五苯薄膜场效应晶体管.作为场效应管半导体层的并五苯薄膜沉积在p型Si(100)(14.0～20.0 Ω·cm)衬底上.场效应管中并五苯薄膜厚度为70nm,源极、漏极和栅极(Au)的厚度均为50nm,绝缘层SiO2的厚度为300nm,沟道宽度为190μm,沟道长度为15μm.用AFM表征了并五苯薄膜表面形貌,并研究了薄膜生长速率对并五苯场效应晶体管电学特性的影响.在薄膜生长速率为0.24和1.36 nm/min时,场效应管的载流子迁移率分别为2.7×10-4和2.2×10-6 cm2/(V·s).     

有机半导体材料并五苯薄膜的生长

优化有机晶体的生长工艺是获得性能优良的有机场效应管(OFET)的重要基础。以热氧化后的硅片为衬底,用真空蒸镀的方法制备了有机半导体材料并五苯薄膜,通过X射线衍射和原子力显微镜对薄膜的生长晶体结构及形貌等进行了分析,讨论了薄膜制备过程中的诸多因素对晶体生长的影响。     

并五苯薄膜微结构及光谱分析

我们采用真空热蒸镀的方法,在60℃的SiO2衬底上生长了并五苯薄膜。通过X-射线衍射、原子力显微镜和Raman散射光谱等手段,分析了薄膜的结晶状态和微观形貌,证明了在衬底温度为60℃的条件下,可以用真空镀膜法生长出具有较高结晶度的并五苯薄膜。此外,我们讨论了并五苯薄膜的紫外一可见吸收光谱和光致发光光谱,分析了各个谱峰形成的原因。     

Si1-x Gex:C缓冲层的生长温度对Ge薄膜外延生长的影响

用化学气相淀积方法,在Si(100)衬底上生长Si1-x Gex:C合金作为缓冲层、继而外延生长了Ge晶体薄膜,用X射线衍射(XRD)、俄歇电子能谱(AES)、拉曼(Raman)衍射光谱等对所得到的样品进行了表征测量,着重研究了Si1-x Gex:C缓冲层生长温度对样品结构特征的影响.结果表明:Si1-x Gex:C缓冲层中的Ge原子浓度沿表面至衬底方向逐渐降低,其平均组分随着生长温度的升高而降低.这与较高生长温度(760～820℃)所导致的原子扩散效应相关;在Si1-x Gex:C缓冲层上外延生长的Ge薄膜具有单一的晶体取向,薄膜的晶体质量随着温度的升高而降低.     

直流反应磁控溅射Zn_(1-x)Cd)_xO薄膜的研究

用直流反应磁控溅射法在n Si(111)和玻璃衬底上生长高度择优取向的Zn1-xCdxO合金晶体薄膜,最佳生长温度为45 0℃(x=0 2 ) .当x≤0 6时,Zn1-xCdxO薄膜具有纯ZnO的六角结构,x =0 8时,薄膜是由ZnO六角结构晶体和CdO立方结构晶体组成的混合物.透射光谱测试表明,通过改变合金薄膜中Cd的含量,可以调节Zn1-x CdxO薄膜的禁带宽度.     

高性能有机薄膜晶体管(OTFT)制备及其导电机制

详细介绍了在SiO2和高kHfO2介质层上制备并五苯薄膜晶体管方面的研究,特别是利用原子力显微技术(AFM)和静电力显微技术(EFM)研究了并五苯分子初始生长模式,揭示了衬底形貌、表面化学性能(包括化学清洗和聚合物层修饰)对有机半导体成膜结构和薄膜场效应晶体管性能之间的关联,包括晶体管迁移率、开关比和阈值电压等;针对并五苯初始生长成核模式的差异,分析了不同岛(畴)间畴边界对载流子在有机薄膜内输运的影响,有助于理解有机半导体薄膜导电机理。通过优化和控制介电层和有机半导体薄膜层的界面化学性质,在SiO2介质层上成功制备出迁移率为1.0cm2/V.s、开关电流比达到106的OTFT器件;在高kHfO2介质层上获得的OTFT器件的工作电压在-5V以下,开关电流比达到105,载流子迁移率为0.6cm2/V.s;器件性能指标已经达到目前国际上文献报道的最好水平。     

直流反应磁控溅射Zn1-xCdxO薄膜的研究

用直流反应磁控溅射法在n-Si(111)和玻璃衬底上生长高度择优取向的Zn1-xCdxO合金晶体薄膜,最佳生长温度为450℃(x＝0.2).当x≤0.6时,Zn1-xCdxO薄膜具有纯ZnO的六角结构,x＝0.8时,薄膜是由ZnO六角结构晶体和CdO立方结构晶体组成的混合物.透射光谱测试表明,通过改变合金薄膜中Cd的含量,可以调节Zn1-x-CdxO薄膜的禁带宽度.     

并五苯的溶解及其薄膜性能表征

报道了并五苯的邻-1,2-氯苯溶液的制备方法及在Si和SiO2表面形成的固态薄膜的紫外-可见光光谱(UV-Vis)、光学显微镜、扫描电镜(SEM)、原子力显微镜(AFM)和X射线衍射(XRD)的表征结果.该溶液在100℃左右能形成较大面积、较均匀的多晶并五苯薄膜.     

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