具有无机有机双绝缘层和修饰电极的薄膜晶体管

研究了有机薄膜晶体管器件.器件是以热生长的SiO2作为有机薄膜晶体管的栅绝缘层,酞菁铜作为有源层的.实验表明采用一种硅烷耦合剂-十八烷基三氯硅烷(OTS)修饰SiO2可以有效地降低栅绝缘层的表面能从而明显提高了器件的性能.器件的场效应迁移率提高了2.5倍、阈值电压降低了3 V、开关电流比从103增加到104.同时我们采用MoO3修饰铝作为器件的源漏电极,形成MoO3/Al双层电极结构.实验表明在同样的栅极电压下,具有MoO3/Al 电极的器件和金电极的器件有着相似的源漏输出电流Ids.结果显示具有OTS/SiO2双绝缘层的及MoO3/Al 电极结构的器件能有效改进有机薄膜晶体管的性能.     

具有双绝缘层和修饰电极的薄膜场效应晶体管

研究了具有OTS/SiO2双绝缘层结构及MoO3/Al电极结构的有机薄膜晶体管.器件是以热生长的Si02作为有机薄膜晶体管的栅绝缘层,酞菁铜作为有源层的.OTS/SiO2双绝缘层的结构提高了器件的场效应迁移率和开关电流比,降低了阈值电压.实验表明在同样的栅极电压下,具有MoO3/Al电极的器件和金电极的器件有着相似的源漏输出电流.结果显示具有OTS/SiO2双绝缘层及MoO3/Al电极结构的器件能有效改进有机薄膜晶体管的性能.     

具有双绝缘层和修饰电极的薄膜场效应晶体管

研究了具有OTS/SiO2双绝缘层结构及MoO3/Al电极结构的有机薄膜晶体管.器件是以热生长的Si02作为有机薄膜晶体管的栅绝缘层,酞菁铜作为有源层的.OTS/SiO2双绝缘层的结构提高了器件的场效应迁移率和开关电流比,降低了阈值电压.实验表明在同样的栅极电压下,具有MoO3/Al电极的器件和金电极的器件有着相似的源漏输出电流.结果显示具有OTS/SiO2双绝缘层及MoO3/Al电极结构的器件能有效改进有机薄膜晶体管的性能.     

基于聚合物绝缘栅的低电压有机薄膜晶体管

利用甲基丙烯酸甲酯-甲基丙烯酸环氧丙脂为栅绝缘层制备了酞箐铜有机薄膜晶体管,在电压为10V时器件具有较好的性能,栅绝缘层的漏电流密度低至2×10-8A/cm2 。测量其电容特性,该绝缘薄膜的介电常数介于3.9-5.0 。通过对绝缘层的减薄,阈值电压由 -3.5V 升至-2.0V,该酞箐铜有机薄膜晶体管可以在低电压下工作,其场效应迁移率为1.2×10-3 cm2/Vs 。     

基板温度对氧化锌薄膜晶体管性能的影响

以ITO玻璃为衬底,利用射频磁控溅射制备了以氧化硅为绝缘层的氧化锌薄膜晶体管。研究了氧化锌薄膜制备过程中不同的衬底温度（衬底温度分别为室温、100℃ 和200℃）对于器件性能的影响。和室温下制备的氧化锌薄膜晶体管相比,衬底温度200℃条件下制备的器件的场效应迁移率提高了94% （从1.6cm2/Vs 提高至3.11cm2/Vs）,亚阈值摆幅 从2.5V/dec 降低至1.9 V/dec 而且阈值电压漂移也从18V 减小至3V （老化电压为25V的正栅压,老化时间为1小时）。实验结果表明,衬底加热对于氧化锌薄膜晶体管的迁移率、亚阈值摆幅和偏压稳定性有明显的影响。利用原子力显微镜AFM对氧化锌薄膜的特性就行了研究,器件性能提高的原因也在文中进行了阐述。     

表面修饰的ZnPc薄膜晶体管性能研究

以热生长的SiO2作为栅绝缘层,酞菁锌(ZnPc)作为有源层,研究了具有十八烷基三氯硅烷(OTS,C18H37SiCl3)/SiO2双绝缘层结构的有机薄膜晶体管(OTFT)。实验表明,采用OTS可以有效地降低SiO2栅绝缘层的表面能并改善表面的平整度,器件的场效应迁移率提高了3.5倍,漏电流从10-9A降到10-10A,阈值电压降低了5 V,开关电流比从103增加到104。结果显示,具有OTS/SiO2双绝缘层的器件结构能有效改进OTFT的性能。     

基于有机薄膜晶体管电特性曲线获取迁移率方法的研究

场效应迁移率是描述有机薄膜晶体管(OTFT)性能的 重要参数之一,目前OTFT场效应迁移率主要根据实验测得OTFT电特性曲线通过拟合计算方法 获得。本文针对这种方法进行深入研究发现,OTFT的场效应迁 移率与其工作状态有关。在线性工作状态下,OTFT的线性区场效应迁移率随 着 栅电压的增加而增大;在饱和工作状态下,当漏电压VD>1.5VGmax时,饱和区场效应迁移率 为一定值,表明采用此值表征OTFT的电性能更加客观和精确。     

并五苯有机薄膜晶体管电学性能研究

制作了以并五苯为半导体有源层材料的有机薄膜晶体管。用热氧化的方法制备了一层230nm的二氧化硅栅绝缘层并用原子力显微镜(AFM)分析了表面形貌。研究了器件的电学性能,得到的并五苯有机薄膜晶体管器件载流子迁移率为8.9×10-3cm2/V.s,器件的阈值电压和开关电流比分别为-8.2V和1.0×104。     

聚合物薄膜晶体管的制备及性能

以硅材料衬底作栅电极,在衬底上依次制备二氧化硅栅介质层、聚合物MEH-PPV薄膜半导体层和金源、漏电极,成功地得到了聚合物薄膜晶体管.器件的制备和测试都是在空气环境中完成.该薄膜晶体管呈现出较好的场效应晶体管饱和特性,器件的载流子迁移率为5.0×10-5 cm2/(V·s),开关电流比大于2×103.通过在氮气氛下对聚合物薄膜进行退火处理以及聚合物薄膜沉膜前对二氧化硅表面修饰可以适当地提高器件的载流子迁移率.     

真空气相沉积生长PTCDI C8 N型有机薄膜晶体管

在大气环境下N型有机薄膜晶体管(OFET)的性能不稳定,为提高晶体管在大气环境稳定性,该文分别制作了SiO2单绝缘层器件和SiO2/PMMA双绝缘层器件。采用N型新材料PTCDI-C8作为有源层,Ag作为源、漏电极,对制作的不同绝缘层的器件进行聚对二甲苯的封装,对有源层进行形貌和晶体结构分析。并进行电流-电压(I-V)曲线测试。在相同工作电压下,双绝缘层器件比单绝缘层器件具有更大的场效应迁移率、开关电流比和更小的阈值电压。     

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.     

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.     

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.     

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.     

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.     

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