注F短沟MOSFET的沟道热载流子效应

通过对短沟NMOSFET的沟道热载流子效应研究,发现在短沟NMOSFET栅介质中引入F离子能明显抑制因沟道热载流子注入引起的阈电压正向漂移和跨导下降以及输出特性曲线的下移.分析讨论了F抑制沟道热载流子损伤的机理.Si—F键释放了Si/SiO2界面应力,并部分替换了Si—H弱键是抑制热载流子损伤的主要原因.     

沟道热载流子导致的 PDSOI NMOSFET's击穿特性

对热载流子导致的 SIMOX衬底上的部分耗尽 SOI NMOSFET's的栅氧化层击穿进行了系统研究 .对三种典型的热载流子应力条件造成的器件退化进行实验 .根据实验结果 ,研究了沟道热载流子对于 SOI NMOSFET's前沟特性的影响 .提出了预见器件寿命的幂函数关系 ,该关系式可以进行外推 .实验结果表明 ,NMOSFET's的退化是由热空穴从漏端注入氧化层 ,且在靠近漏端被俘获造成的 ,尽管电子的俘获可以加速 NMOSFET's的击穿 .一个 Si原子附近的两个 Si— O键同时断裂 ,导致栅氧化层的破坏性击穿 .提出了沟道热载流子导致氧化层击穿的新物理机制     

沟道热载流子导致的PDSOI NMOSFET's击穿特性

对热载流子导致的SIMOX衬底上的部分耗尽SOI NMOSFET's 的栅氧化层击穿进行了系统研究．对三种典型的热载流子应力条件造成的器件退化进行实验．根据实验结果,研究了沟道热载流子对于SOI NMOSFET's前沟特性的影响．提出了预见器件寿命的幂函数关系,该关系式可以进行外推．实验结果表明,NMOSFET's 的退化是由热空穴从漏端注入氧化层,且在靠近漏端被俘获造成的,尽管电子的俘获可以加速NMOSFET's的击穿．一个Si原子附近的两个Si—O键同时断裂,导致栅氧化层的破坏性击穿．提出了沟道热载流子导致氧化层击穿的新物理机制．     

槽栅NMOSFET结构与性能仿真

基于流体动力学能量输运模型 ,利用二维器件模拟器 MEDICI对深亚微米槽栅 NMOSFET器件的结构参数 ,如结深、凹槽拐角及沟道长度等对器件性能的影响进行了仿真研究 ,并与相应的常规平面器件特性进行了对比 .研究表明在深亚微米范围内 ,槽栅器件能够很好地抑制短沟道效应和热载流子效应 ,但电流驱动能力较平面器件小 ,且器件性能受凹槽拐角和沟道长度的影响较显著     

深亚微米槽栅NMOSFET结构参数对其抗热载流子特性的影响

基于流体动力学能量输运模型和幸运热载流子模型,用二维器件仿真软件Medici对深亚微米槽栅NMOSFET的结构参数,如沟道长度、槽栅凹槽拐角角度、漏源结深等,对器件抗热载流子特性的影响进行了模拟分析,并与常规平面器件的相应特性进行了比较.结果表明即使在深亚微米范围,槽栅器件也能很好地抑制热载流子效应,且其抗热载流子特性受凹槽拐角和沟道长度的影响较显著,同时对所得结果从内部物理机制上进行了分析解释.     

不同沟道长度MOSFET的热载流子效应

对同一工艺制作的几种不同沟道长度的 MOSFET进行了沟道热载流子注入实验。研究了短沟 MOS器件的热载流子效应与沟道长度之间的关系。实验结果表明 ,沟道热载流子注入使 MOSFET的器件特性发生退变 ,退变的程度与器件的沟道长度之间有非常密切的关系。沟道长度越短器件的热载流子效应越明显 ,沟道长度较长的器件的热载流子效应很小。利用热载流子效应产生的机理分析和解释了这一现象     

槽栅NMOSFET结构与性能仿真

基于流体动力学能量输运模型,利用二维器件模拟器MEDICI对深亚微米槽栅NMOSFET器件的结构参数,如结深、凹槽拐角及沟道长度等对器件性能的影响进行了仿真研究,并与相应的常规平面器件特性进行了对比.研究表明在深亚微米范围内,槽栅器件能够很好地抑制短沟道效应和热载流子效应,但电流驱动能力较平面器件小,且器件性能受凹槽拐角和沟道长度的影响较显著.     

注F短沟MOSFET的抗热载流子损伤特性

研究了用注 F工艺制作的短沟 MOSFET的热载流子效应。实验结果表明 ,在栅介质中注入适量的 F能够明显地减小由热载流子注入引起的阈电压漂移、跨导退化和输出特性的变化。分析讨论了 F的抗热载流子损伤的机理     

一种适合制作CMOS的SiGePMOSFET

在通常适合于制作埋沟 Si Ge NMOSFET的 Si/弛豫 Si Ge/应变 Si/弛豫 Si Ge缓冲层 /渐变 Ge组分层的结构上 ,制作成功了 Si Ge PMOSFET.这种 Si Ge PMOSFET将更容易与 Si Ge NMOSFET集成 ,用于实现 Si Ge CMOS.实验测得这种结构的 Si Ge PMOSFET在栅压为 3.5 V时最大饱和跨导比用作对照的 Si PMOS提高约 2倍 ,而与常规的应变 Si Ge沟道的器件相当     

一种适合制作CMOS的SiGe PMOSFET

在通常适合于制作埋沟SiGe NMOSFET的Si/弛豫SiGe/应变Si/弛豫SiGe缓冲层/渐变Ge组分层的结构上,制作成功了SiGe PMOSFET.这种SiGe PMOSFET将更容易与SiGe NMOSFET集成,用于实现SiGe CMOS.实验测得这种结构的SiGe PMOSFET在栅压为3.5V时最大饱和跨导比用作对照的Si PMOS提高约2倍,而与常规的应变SiGe沟道的器件相当.     

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.     

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