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结合丝网印刷技术、烘烤工艺和烧结工艺,采用印刷ZnO层和银浆层相结合的方案,进行了分段复合衬底电极的制作。该分段复合衬底电极能够降低无效的阴极电压降,增强三极场发射显示器的发光亮度并改善其发光均匀性,且制作成本低廉。分段复合衬底电极避免了过长过细衬底电极现象,促使碳纳米管提供更多电子,同时有效改善了碳纳米管的场发射均匀性。利用碳纳米管作为阴极材料,进行了三极场发射显示器的研制,并进行点阵图像显示,从而证实了这种分段复合衬底电极制作工艺的可行性。与普通银电极场发射显示器相比,分段复合衬底电极场发射显示器能够将开启场强从1.92 V/μm降低到1.81 V/μm,其最大场发射电流由1 332.5μA提高到2 137.8μA,具有典型的场致发射特性以及优良的图像发光均匀性。
Combined with the screen printing technology, baking process and sintering process, the composite ZnO / silver paste layer was used to fabricate the composite electrode. The segmented composite substrate electrode can reduce the invalid cathode voltage drop, enhance the light emitting brightness of the triode field emission display and improve the light emitting uniformity thereof, and the manufacturing cost is low. Segmented composite substrate electrode to avoid too long thin substrate electrode phenomenon, prompting carbon nanotubes to provide more electrons, while effectively improving the carbon nanotube field emission uniformity. The use of carbon nanotubes as the cathode material, the development of the triode field emission display, and dot matrix image display, thus confirming the feasibility of this sub-composite electrode fabrication process. Compared with the common silver electrode field emission display, the segmented composite substrate field emission display can reduce the on-field intensity from 1.92 V / μm to 1.81 V / μm, and increase the maximum field emission current from 1 332.5 μA to 2 137.8 μA , With a typical field emission characteristics and excellent image uniformity.