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基于烧结工艺和丝网印刷技术,研发了一种新的沟槽形冷阴极.底部绝缘层由黑色绝缘浆料被烧结后制成,且在底部绝缘层中存在倾斜面.将银浆丝网印刷在条形电极上,依次经烘烤和烧结工艺后形成银电极.利用细砂纸,对银电极进行适当的抛光工艺,以便获得光滑的电极表面.由于特有的银电极形状,从而易于获得更大的场增强因子.将碳纳米管制备在银电极上,形成场发射极.致密的碳纳米管层完全覆盖银电极表面,特有的边缘场增强效应能够使得碳纳米管发射出更多的电子.顶部绝缘层则用于抑制碳纳米管的横向电子发射.结合沟槽形冷阴极,制作了三极结构的场致发射显示器,该显示器具有良好的场致发射特性及优良的发光图像均匀性.与普通冷阴极场致发射显示器相比,沟槽形冷阴极场致发射显示器能够将开启电场从1.86V/μm降低到1.78V/μm,将最大场致发射电流从1 537μA增加到2 863μA,且将最大发光图像亮度从1 386cd/m2提高到1 865cd/m2.该制作技术在场致发射显示器中具有较强的实际应用性.
Based on the sintering process and the screen printing technology, a new trench-type cold cathode has been developed, the bottom insulating layer is made by sintering the black insulating paste, and there is an inclined surface in the bottom insulating layer. Printed on strip electrodes, followed by baking and sintering process to form a silver electrode.Using fine sandpaper, the silver electrode is subjected to a suitable polishing process in order to obtain a smooth electrode surface. Due to the unique silver electrode shape, A large field enhancement factor.Carbon nanotubes prepared on the silver electrode to form a field emitter.The dense carbon nanotube layer completely covering the silver electrode surface, the unique fringe field enhancement effect can make carbon nanotubes emit more electrons The top insulating layer is used to suppress the lateral electron emission of the carbon nanotubes.With the trench-shaped cold cathode, a three-electrode field-emission display is fabricated with good field emission characteristics and excellent uniformity of luminescent images Compared with the common cold cathode field emission display, the trench cold cathode field emission display can reduce the on-field from 1.86V / μm to 1.78V / μm and the maximum field emission current from 135 7μA to 2 863μA, and the brightness of the largest light-emitting image increased from 1 386cd / m2 to 1865cd / m2.The fabrication technique has strong practical application in field emission displays.