193 nm光刻胶的研制

从主体树脂的结构设计、单体的合成工艺、主体树脂的合成工艺、光致产酸剂的评价、配方研究等多个方面论述了193nm光刻胶的研制工艺,合成出了多种适用的单体及多种结构的主体树脂,进行了大量的配方研究,筛选出了最佳配方.研制出的样品经美国SEMATECH实验室应用评价其最佳分辨率为0.1μm,最小曝光量为26mJ/cm2,不但具有优异的分辨率和光敏性,而且还具有良好的粘附性和抗干法腐蚀性.     

EFFECT OF ACIDITY ON ACID-SENSITIVE UV CURING SYSTEM*

By using diphenyliodonium salts with different counterions as photo acid generators (PAGs), theeffect of acidity on ring-opening polymerization of epoxy monomers and polycondensation of polyol withhexamethoxymethyl melamine (HMMM) was studied. The result shows that the rate of ring-openingpolymerization is evidently dependent on the acidity of the acid and strong photo-generated acid is required.However, there is a leveling effect in the polycondensation system; if the photo-generated acid is strongerthan protonated HMMM, the acidity does not obviously affect the polycondensation rate.     

The fabrication and performance of an Ag/AgCl reference electrode in human serum

A simple set of electric circuits was used to assemble a pulse generator. With pulse potentials and under galvanostatical control, a clean silver wire was anodized electrochemically for 0.2–0.5 min in 1.0 mol l⁻¹ HCl with a pulse current density of 20 mA cm⁻², and the pulse wave parameters of t_a/t_c = 1 and a cycle of 4 s forming an Ag/AgCl reference electrode. Even though the AgCl layer was consumed during the working period when the Ag/AgCl electrode was used as a cathode, the AgCl layer could be in situ recovered electrochemically in serum used when a reversed potential was applied to the electrode system immediately after the measuring program was finished. The current response curve of the anode indicated that an AgCl layer in high density was basically accomplished during the first 6 pulse cycles in human serum. In order to keep a stable and uniform AgCl layer on the reference electrode after each measuring cycle, the ratio of the recovery time (t_r) to the working time (t_w) was measured and the smallest value was obtained at 0.03. The open-circuit potential of the Ag/AgCl electrode with respect to a SCE in 0.1 mol l⁻¹ KCl was monitored over a period of 14 days and the mean value was 40.09 mV vs SCE with a standard deviation of 2.55 mV. The potential of the Ag/AgCl reference electrode did remain constant when the measurements were repeated more than 600 times in undiluted human serum with a standard deviation of 1.89 mV. This study indicated that the Ag/AgCl reference electrode could been rapidly fabricated with a pulse potential and could be used as a reference electrode with long-term stable properties in human serum samples.     

Maximum Correlation Analysis of Nonlinear Combining Functions in Stream Ciphers

The maximum correlation of a Boolean function to all Boolean functions of a subset of its input variables is investigated. A relationship is derived between the maximum correlation and the mutual information between the output of a balanced Boolean function and a subset of its random input variables. For bent functions (which are never balanced), both the mutual information and the maximum correlation are bounded and shown to be small in a strong sense. Received 14 February 1996 and revised 15 January 2000 Online publication 19 May 2000     

A Levinson-like algorithm for symmetric strongly nonsingular higher order semiseparable plus band matrices

In this paper, we will derive a solver for a symmetric strongly nonsingular higher order generator representable semiseparable plus band matrix. The solver we will derive is based on the Levinson algorithm, which is used for solving strongly nonsingular Toeplitz systems.     

基于FPGA的2DPSK信号产生器的设计与实现

用VHDL设计了一种2DPSK信号产生器，测试和实际应用表明其性能稳定可靠。     

Two-Particle Spectrum of the Generator for Stochastic Model of Planar Rotators at High Temperatures

We study two-particle spectrum branches of the generator in the stochastic model of planar rotators, using the construction of a special basis in two-particle invariant subspaces. We prove that the branches of the spectrum are in a small neighborhood of the point 2. We prove the existence of two bound states in addition to the continuous part of the spectrum in the one-dimensional case.     

一种新型混沌产生器

通过构造一个转折点值α可变的三分段线性奇函数，研究一种新型混沌产生器.这种混沌产生器的主要特征是，随着转折点值α在0<α≤1范围内变化时，系统从倍周期分岔进 入混沌状态，可产生双层单螺旋、单层单螺旋、双层双螺旋和单层双螺旋四种不同类型的混沌吸引子，其中双层单螺旋和双层双螺旋为本电路实验中所发现的两类新型混沌吸引子.分析了这种混沌产 生器随α值在0<α≤1范围内变化时的分岔图、李雅普诺夫指数谱、最大李雅普诺夫指 数λ_max以及单层双螺旋和双层双螺旋的功率谱.在此基础上设计硬件电路，进行了计算机模拟和电路实 关键词： 混沌产生器 双层双螺旋 双层单螺旋 电路实验     

标准图像发生器及在图像板性能评价中的应用

本文介绍了一种标准图像信号发生器的原理、结构和特点。该发生器采用先进的数字合成技术，融合了ＥＰＬＤ编程技术、ＥＰＲＯＭ技术和高速、高精度１２ｂｉｔＤ／Ａ转换器，配以高性能视频放大和高阶模拟低通滤波器，产生的信号波形失真小、信噪比高。可生成正弦波、方波、三角波、线性波及直流等多种标准图像信号。并介绍了将该系统应用于图像板性能评价的具体方法。实际分析了一种图像板的时域和频域特性，主要包括线性度、Ａ／Ｄ转换精度和调制传递函数等。给出了被测图像板的调制传递函数曲线