双光源DMD数字光刻系统

基于DMD数字光刻系统,建立了一种新型的双光源DMD数字光刻系统.双光源DMD数字光刻系统由光源照明系统、DMD数字微镜、投影物镜以及CCD调焦系统等几个部分组成.实验表明,与DMD数字光刻系统相比,双光源DMD数字光刻系统具有调焦点不被曝光的优点,可用于制作光纤端面微光学器件.     

浅谈曲面直写式光刻工艺

针对一些曲面栅网器件的加工工艺,从实验装置、光刻原理、光刻工艺及参数要求等方面进行了分析,为后续深入开展曲面直写式光刻工艺打下了基础.     

激光直写系统制作掩模和器件的工艺

激光直写系统是国际上９０年代制作集成电路光刻掩模版的新型专用设备。微细加工光学技术国家重点实验室从加拿大引进了国内第一台激光直写系统。利用这台系统，通过高精度激光束在光致抗蚀剂上扫描曝光，将设计图形直接转移到掩模或硅片上。激光直写系统的应用，可以分成一次曝光制作光刻掩模和多次套刻曝光制作器件两个方面。介绍使用激光直写系统制作光刻掩模和套刻器件的具体工艺，并给出利用激光直写工艺做出的一些掩模和器件的实例     

MMI微压印模板的设计与研究

微纳米压印技术作为代替传统光刻的一种新兴技术,有着重要的应用潜力。近年来在直接加工微器件如微流体、微生物器件,特别是在微平面光学器件方面得到了较快的发展。采用微压印法直接加工聚合物微平面光学器件是一个具有实用价值和研究价值的课题。该文首先讨论并选取了聚甲基丙稀酸甲酯(PMMA),研究了聚合物多模干涉(MMI)耦合器器件的微压印模板的设计和加工,讨论了压印模板材料的影响。根据典型基于MMI聚合物分光器件模板的设计实例,由聚合物的光学性能和分光要求,设计出模板的几何尺寸,通过微细加工工艺加工出模板,并给出了初步的热压印实验结果。     

微光刻与微/纳米加工技术

介绍了微电子技术的关键工艺技术——微光刻与微/纳米加工技术,回顾了中国制版光刻与微/纳米加工技术的发展历程与现状,讨论了微光刻与微/纳米加工技术面临的挑战与需要解决的关键技术问题,并介绍了光学光刻分辨率增强技术、下一代光刻技术、可制造性设计技术、纳米结构图形加工技术与纳米CMOS器件研究等问题。近年来,中国科学院微电子研究所通过光学光刻系统的分辨率增强技术(RET),实现亚波长纳米结构图形的制造,并通过应用光学光刻系统和电子束光刻系统之间的匹配与混合光刻技术及纳米结构图形加工技术成功研制了20～50nm CMOS器件和100nm HEMT器件。     

平面型光无源器件的制造技术

一、前言随着单模光纤传输系统的发展,单模光纤无源器件的需求将会增加。制造单模光纤无源器件的技术目前有二种。一种是在多模器件制造技术的基础上,进一步提高制造精度,制造出单模无源器件;另一种就是应用集成电路工艺,研制平面型的光无源器件。所谓平面型无源器件,是指采用铌酸锂等衬底材料,经沉积、光刻、扩散等集成电路工艺,并与单模光纤耦合而成的具有转换、波长分割复用或耦合等功能的无源器件。这种     

专利

本专利阐述了在光刻系统中,利用已知共焦成像原理完成调焦的方法和仪器.这种调焦系统的主要优点是不需要标定,因为光电探测器接收的最强信号是在焦点上.该系统的另外一些优点是产生许多投影点,以便在大面积上实现均匀调焦并使共焦系统中辐射光的调制与光刻系统本身的成像辐射光区     

激光直写系统在ASIC器件制作中的应用

激光直写系统是制作光刻掩模和ASIC器件的新型专用设备。微细加工光学技术国家重点实验室引进了男内第一台激光直写系统，利用这台系统，通过高精度激光束在光致抗蚀剂上扫描曝光，能够把设计图形直接转移到掩模版或芯片上，本文介绍激光直写系统在ASIC器件制作中的应用和具体工艺。     

制备纳米级ULSI的极紫外光刻技术

在下一代光刻技术中,由于极紫外光刻(EUVL)分辨率高、且具有一定的产量优势及传统光学光刻技术的延伸性,因而是IC业界制备纳米级ULSI器件的首选光刻方案之一.本文论述了EUVL技术的原理、加工工艺和设备,并对比分析了EUVL的生产成本、应用前景及其优缺点.     

任意三维表面微型光器件的灰度光刻技术

使用传统的微加工技术,如各向异性或各向同性干刻蚀、湿刻蚀只能加工有限形貌的表面,为了克服这一缺点,发展了多层掩模技术、激光三维立体光刻、电子束直接写入技术等许多三维微加工技术。灰度光刻最被看好,它通过灰度掩模把加工光束能量密度分布调制成不同的形状,对光刻胶进行曝光,微型器件一次成形,不需要移动掩模或移动加工晶片,也不需要对光刻胶进行热处理,只需要对掩模版进行一定的编码和标准的光刻设备,容易和其他IC工艺相兼容,实现系统芯片结构的制作。本文分析了它的物理机制、掩模类型、编码过程、约束条件和优化方法。     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

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.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.     

GaAsSb/InAlAs PA DHBTs Grown by Production MBE

The epi material growth of GaAsSb based DHBTs with InAlAs emitters are investigated using a 4 × 100mm multi-wafer production Riber 49 MBE reactor fully equipped with real-time in-situ sensors including an absorption band edge spectroscope and an optical-based flux monitor. The state-of-the-art hole mobilities are obtained from 100nm thick carbon-doped GaAsSb. A Sb composition variation of less than ± 0.1 atomic percent across a 4 × 100mm platen configuration has been achieved. The large area InAlAs/GaAsSb/InP DHBT device demonstrates excellent DC characteristics,such as BVCEO＞6V and a DC current gain of 45 at 1kA/cm2 for an emitter size of 50μm × 50μm. The devices have a 40nm thick GaAsSb base with p-doping of 4. 5 × 1019cm-3 . Devices with an emitter size of 4μm × 30μm have a current gain variation less than 2% across the fully processed 100mm wafer. ft and fmax are over 50GHz,with a power efficiency of 50% ,which are comparable to standard power GaAs HBT results. These results demonstrate the potential application of GaAsSb/InP DHBT for power amplifiers and the feasibility of multi-wafer MBE for mass production of GaAsSb-based HBTs.     

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.