一种电子束自会聚型后栅场发射显示器的研究  

Study on Under-Gate Field Emission Display with Electron Beams Self-Focus Effect

作　　者：吴朝兴[1] 张永爱[1] 张杰[1] 李昱[1] 郭太良[1] 

机构地区：[1]福州大学物理与信息工程学院,福建福州350002

出　　处：《光学学报》2010年第12期3574-3579,共6页Acta Optica Sinica

基　　金：国家863计划(2008AA03A313);福建省科技厅资助省属高校项目(2008F5001);福建省教育厅资助项目(J09003);福建省自然科学基金(2009J05145)资助课题

摘　　要：提出一种具有凹面阴极结构的电子束自会聚型后栅场发射显示器(FED)。利用Ansys软件模拟此器件的电场分布和电子束轨迹,研究凹面阴极不同曲率半径对阳极光斑尺寸的影响,并与平面阴极型后栅FED进行比较。仿真结果表明此器件可有效减小电子束的发散角和阳极光斑尺寸,阳极光斑尺寸随着凹面阴极曲率半径的减小而减小,同时可获得更高的电流密度。利用丝网印刷技术制备10cm×10cm的电子束自会聚型后栅FED,对其场发射性能进行测试。结果表明此器件可有效减小阳极光斑尺寸,提高显示器的分辨率;阳极电压为600V,栅极电压在100～250V范围内对电子发射有良好的调控作用。An under-gate field emission display（FED） with a concave cathode is proposed.Ansys software is used to simulate the electric field distribution and the focus effect of electron beams.The curvature radius of a concave cathode which affects the self-focus is investigated.The results demonstrate that the concave cathode focuses electron beams which emit from cathode obviously.As the curvature radius of a concave cathode decreases,the focus effect is enhanced and the radius of spots on the anode decreases too.A 10cm×10cm FED with a good self-focus effect is successfully prepared using screen printing.The field emission image shows that the structure can decrease the size of spots and improve the resolution.The anode current is well modulated by a gate voltage of 100～250 V under an applied anode voltage of 600 V.

关 键 词：光电子学 场致发射 自会聚 计算机模拟 后栅结构 

分 类 号：TN873[电子电信—信息与通信工程]