TFT-LCD(Thin Film Transistor-Liquid Crystal Display)在显示白画面的时候,屏幕边缘有发青的现象,这种不良现象严重影响人们的观赏感受,需要将这种不良进行改善。经过分析得知,TFT(Thin Film Transistor)基板的层间介质层(interlayer ...TFT-LCD(Thin Film Transistor-Liquid Crystal Display)在显示白画面的时候,屏幕边缘有发青的现象,这种不良现象严重影响人们的观赏感受,需要将这种不良进行改善。经过分析得知,TFT(Thin Film Transistor)基板的层间介质层(interlayer dielectrics,ILD)的氢化氮化硅(SiN_X:H)薄膜厚度偏薄,致使TFT基板的蓝光透过率偏大,从而导致TFT-LCD在显示白画面时,白光中蓝色光的比例偏大,最终出现发青现象。通过增加SiN_X:H薄膜的沉积厚度及减少SD(Source and Drain)干法刻蚀时间,使无SD覆盖的ILD膜层的SiN_X:H薄膜厚度增加,减小了TFT基板的蓝光透过率,最终TFT-LCD的白画面颜色均匀,无发青现象。展开更多
Deep dielectric charging/discharging,caused by high energy electrons,is an important consideration in electronic devices used in space environments because it can lead to spacecraft anomalies and failures.The Jovian p...Deep dielectric charging/discharging,caused by high energy electrons,is an important consideration in electronic devices used in space environments because it can lead to spacecraft anomalies and failures.The Jovian planets,including Saturn,Uranus,Neptune and Jupiter’s moons,are believed to have robust electron radiation belts at relativistic energies.In particular,Jupiter is thought to have caused at least 42 internal electrostatic discharge events during the Voyager 1 flyby.With the development of deep space exploration,there is an increased focus on the deep dielectric charging effects in the orbits of Jovian planets.In this paper,GEANT4,a Monte Carlo toolkit,and radiation-induced conductivity(RIC)are used to calculate deep dielectric charging effects for Jovian planets.The results are compared with the criteria for preventing deep dielectric charging effects in Earth orbit.The findings show that effective criteria used in Earth orbit are not always appropriate for preventing deep dielectric charging effects in Jovian orbits.Generally,Io,Europa,Saturn(R_S=6),Uranus(L=4.73)and Ganymede missions should have a thicker shield or higher dielectric conductivity,while Neptune(L=7.4)and Callisto missions can have a thinner shield thickness or a lower dielectric conductivity.Moreover,dielectrics grounded with double metal layers and thinner dielectrics can also decrease the likelihood of discharges.展开更多
文摘TFT-LCD(Thin Film Transistor-Liquid Crystal Display)在显示白画面的时候,屏幕边缘有发青的现象,这种不良现象严重影响人们的观赏感受,需要将这种不良进行改善。经过分析得知,TFT(Thin Film Transistor)基板的层间介质层(interlayer dielectrics,ILD)的氢化氮化硅(SiN_X:H)薄膜厚度偏薄,致使TFT基板的蓝光透过率偏大,从而导致TFT-LCD在显示白画面时,白光中蓝色光的比例偏大,最终出现发青现象。通过增加SiN_X:H薄膜的沉积厚度及减少SD(Source and Drain)干法刻蚀时间,使无SD覆盖的ILD膜层的SiN_X:H薄膜厚度增加,减小了TFT基板的蓝光透过率,最终TFT-LCD的白画面颜色均匀,无发青现象。
基金supported by Beijing Municipal Natural Science Foundation-Quantitative Research on Mitigating Deep Dielectric Charging Effects in Jupiter orbits(No.3184048)National Key Scientific Instrument and Equipment Development Projects,China(No.2012YQ03014207)。
文摘Deep dielectric charging/discharging,caused by high energy electrons,is an important consideration in electronic devices used in space environments because it can lead to spacecraft anomalies and failures.The Jovian planets,including Saturn,Uranus,Neptune and Jupiter’s moons,are believed to have robust electron radiation belts at relativistic energies.In particular,Jupiter is thought to have caused at least 42 internal electrostatic discharge events during the Voyager 1 flyby.With the development of deep space exploration,there is an increased focus on the deep dielectric charging effects in the orbits of Jovian planets.In this paper,GEANT4,a Monte Carlo toolkit,and radiation-induced conductivity(RIC)are used to calculate deep dielectric charging effects for Jovian planets.The results are compared with the criteria for preventing deep dielectric charging effects in Earth orbit.The findings show that effective criteria used in Earth orbit are not always appropriate for preventing deep dielectric charging effects in Jovian orbits.Generally,Io,Europa,Saturn(R_S=6),Uranus(L=4.73)and Ganymede missions should have a thicker shield or higher dielectric conductivity,while Neptune(L=7.4)and Callisto missions can have a thinner shield thickness or a lower dielectric conductivity.Moreover,dielectrics grounded with double metal layers and thinner dielectrics can also decrease the likelihood of discharges.
