用于后端工艺中铜/低k材料金属去除的实验数值研究

1 Introduction The consumer electronics market demands high-er speeds and more functionality of ICs. Speed and functionality of an IC are related to the amount of cir- cuitry (such as transistors), which is packed on eachchip. Therefore, the dimensions of the transistors need to be reduced. The interconnect structure, which con- nects the transistors, must become smaller too to com- ply with the small dimensions of the transistors. In or- der to reduce undesirable effects[1], which follow fr…     

Investigations on High Amylose Corn Starch Films. Part 3: Stress Strain Behaviour

By autoclaving a watery high amylose corn starch suspension, homogenous and isotrope films were obtained with different processing parameters. The films were used for investigations on the stress strain behavior. A systematical dependence on the water content and the relationship between native lipids and the starch chains was observed. Especially for films obtained from defatted corn starch, a clear transition was obtained, depending on the water content, from a brittle behavior far below the glass transition temperature T_G with a very high Youngsmodulus to a ductile failure behavior above T_G. The results led to a microscopical model for the native high amylose corn starch films, which in addition outlines the very interesting possibility of controlling in detail changes of the macroscopic stress strain behavior through variations on a molecular scale.     

Chemoenzymatische Synthese von N6-Carbamoyl-D-4-thialysin und N7-Carbamoyl-D-homo-5-thialysin

Chemoenzymatical Synthesis of N⁶-Carbamoyl-D-4-thialysine and N⁷-Carbamoyl-D-homo-5-thialysine The combination of classical chemical and enzymatical methods opens a way to highly functionalized chiral molecules like N⁶-carbamoyl-D-4-thialysine ( 5 ) or N⁷-carbamoyl-D-homo-5-thialysine ( 6 ). The biotransformation of the corresponding hydantoines with Agrobacterium radiobacter is creating the desired D chirality.     

靴套的创新开发--QualiFlex靴套

对比了QualiFlex Q型,QualiFlex QX型、QualiFlex QV型三种聚胺酯材料靴套的性能,从而说明独特的QualiFlex靴套性能,使纸幅横幅水分的均匀性得到改善,纸幅出压榨干度得以维持恒定.     

iFlash:80℃活化漂白与新型皂洗

加工技术与设备的发展通常会使加工时间缩短.但是新型助剂的应用也可减少加工时间,大大降低成本.随着iFlash系统的应用,漂白温度可降至80℃,活性染料染色后皂洗的时间也大大缩短.因此,织物间歇式染色得到优化,在不增加额外投资的情况下运行更经济.     

Lifetime assessment of epoxies by the kinetics of thermal degradation

The kinetics of thermal degradation of 4,4′‐diaminodiphenylsulfone (DDS)‐cured glycidylethers (DGBA) and glycidylamines (TGDDM) have been studied by isothermal annealing. Thermal degradation proceeds via first‐order kinetics with activation energies of 138 (DGBA/DDS) and 95 kJ/mol (TGDDM/DDS). From these data the temperature‐dependent lifetime can be calculated. Based on the heat distortion temperature and 20 years' service as criteria, the upper service temperature is found to be around 115–120°C. In spite of the different activation energies and bond stabilities, only marginal differences in the upper allowed service temperatures between these resins were found. Only slight improvements can be expected by optimizing the cure conditions. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 1881–1886, 2004