常压射频激励低温冷等离子体刻蚀光刻胶

介绍了一种新型的常压射频激励低温冷等离子体喷射装置,利用电流和电压探针研究了该等离子体的放电特性,利用热电偶研究了喷射出的等离子体束流温度,得到其放电与传统的真空室中电容耦合放电具有一致的特性.利用该等离子体装置在大气压下对AZ9918光刻胶进行了干法刻蚀实验,用电镜观察了刻蚀留胶前后硅表面的效果,研究了放电等离子体功率以及衬底温度对刻蚀速率的影响,在放电功率为300W时,得到刻蚀速率接近500nm/min.     

常压射频激励低温冷等离子体刻蚀光刻胶

介绍了一种新型的常压射频激励低温冷等离子体喷射装置,利用电流和电压探针研究了该等离子体的放电特性,利用热电偶研究了喷射出的等离子体束流温度,得到其放电与传统的真空室中电容耦合放电具有一致的特性．利用该等离子体装置在大气压下对AZ9918光刻胶进行了干法刻蚀实验,用电镜观察了刻蚀留胶前后硅表面的效果,研究了放电等离子体功率以及衬底温度对刻蚀速率的影响,在放电功率为300W时,得到刻蚀速率接近500nm/min．     

常压射频冷等离子体刻蚀硅的研究

介绍一种新型的常压射频低温冷等离子放电设备,并用该设备进行硅刻蚀的工艺实验.研究了刻蚀硅的速率随等离子体放电功率、气体流量以及衬底温度的变化规律,并得到了最大刻蚀速率为390nm/min.利用台阶仪、显微镜和扫描电镜(SEM)对刻蚀效果进行检测与分析,证实了该设备对硅的浅刻蚀具有较好的均匀性和较高的各向异性.结果表明,该设备在常压下刻蚀硅,操作简单且不易对材料表面产生损伤.     

常压射频冷等离子体刻蚀硅的研究

介绍一种新型的常压射频低温冷等离子放电设备,并用该设备进行硅刻蚀的工艺实验.研究了刻蚀硅的速率随等离子体放电功率、气体流量以及衬底温度的变化规律,并得到了最大刻蚀速率为390nm/min.利用台阶仪、显微镜和扫描电镜(SEM)对刻蚀效果进行检测与分析,证实了该设备对硅的浅刻蚀具有较好的均匀性和较高的各向异性.结果表明,该设备在常压下刻蚀硅,操作简单且不易对材料表面产生损伤.     

窄间隙介质阻挡放电清除硅片表面颗粒污染物

硅片清洗技术已成为制备高技术电子产品的关键技术。采用窄间隙介质阻挡放电方法研制了低温氧等离子体源,把氧离解、电离、离解电离成O、O-、O+和O2(a1Δg)等低温氧等离子体,其中O-和O2(a1Δg)活性粒子进一步反应形成高质量浓度臭氧气体,再溶于酸性超净水中,用于去除硅片表面颗粒污染物。实验结果表明:当等离子体源输入功率为300 W时,臭氧气体质量浓度最高为316 mg/L;高质量浓度臭氧气体溶于pH值为3.8的超净水中形成臭氧超净水,质量浓度为62.4 mg/L;在硅片清洗槽内,高质量浓度臭氧超净水仅用30 s就可去除硅片表面的Cu、Fe、Ca、Ni和Ti等金属颗粒物,去除率分别为98.4%、95.2%、88.4%、85.2%和64.1%。本方法与目前普遍使用的RCA清洗法相比,具有无需大剂量化学试剂和多种液体化学品、清洗工艺简单、投资及运行成本低等优势。因此,窄间隙介质阻挡放电清洗硅片表面颗粒污染物技术具有广阔的市场应用前景。     

硅衬底超精密CMP中抛光液的研究

针对硅衬底的化学机械抛光,采用自制的大粒径硅溶胶抛光液进行抛光实验,研究了抛光液中主要组分对抛光速率和表面平整度的影响,以提高抛光速率和抛光质量,采用测厚仪、AFM、台阶仪对抛光速率和表面进行了测试和表征.通过优化实验获得了高速率、高平整的抛光表面.去除速率(MRR)达697nm/min,表面粗糙度(RMS)降低至0.4516nm,在提高抛光速率的同时对硅片实现了超精密抛光.     

硅衬底超精密CMP中抛光液的研究

针对硅衬底的化学机械抛光,采用自制的大粒径硅溶胶抛光液进行抛光实验,研究了抛光液中主要组分对抛光速率和表面平整度的影响,以提高抛光速率和抛光质量,采用测厚仪、AFM、台阶仪对抛光速率和表面进行了测试和表征.通过优化实验获得了高速率、高平整的抛光表面.去除速率(MRR)达697nm/min,表面粗糙度(RMS)降低至0.4516nm,在提高抛光速率的同时对硅片实现了超精密抛光.     

硅衬底超精密CMP中抛光液的研究

针对硅衬底的化学机械抛光，采用自制的大粒径硅溶胶抛光液进行抛光实验，研究了抛光液中主要组分对抛光速率和表面平整度的影响，以提高抛光速率和抛光质量，采用测厚仪、AFM、台阶仪对抛光速率和表面进行了测试和表征. 通过优化实验获得了高速率、高平整的抛光表面. 去除速率（MRR）达697nm/min，表面粗糙度（RMS）降低至0.4516nm，在提高抛光速率的同时对硅片实现了超精密抛光.     

SiO2/CeO2混合磨料对硅CMP效果影响

以获得高去除速率和低表面粗糙度为目标,建立了基于纳米氧化铈-硅溶胶复配混合磨料新模式。采用小粒径、低分散度的30 nm氧化铈-硅溶胶复配混合作为磨料,利用氧化铈对硅片表面化学反应产物硅酸胺盐的强络合作用,加快了硅衬底表面化学反应进程。分析了复合磨料抛光的机理,通过Aglient 5600LS原子力显微镜,测试了抛光前后的厚度及抛光后的硅片表面微粗糙度。实验结果表明,复合磨料抛光后硅片表面在10μm×10μm范围内粗糙度方均根值0.361 nm,表面微粗糙度降低16%以上,去除率为1 680 nm/min,硅CMP速率提高8%以上,实现了高去除速率、低表面粗糙度的硅单晶抛光。     

一种新型超净高纯试剂在半导体技术中的应用

通过对新型超净高纯试剂同常规CMOS酸碱试剂同时进行CMOS工艺中栅氧化前的清洗实验,从清洗后硅片残留金属量的电感耦合高频等离子体原子发射光谱分析、硅片表面形貌的AFM分析和MOS电容测量三个方面进行了应用实验.结果表明,以超净高纯乙腈为主要组分的新型试剂,其清洗效果总体优于常规CMOS酸碱试剂,可以考虑在半导体器件相应清洗工艺中采用.     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.