Using carbon nanotubes (CNTs) film as cathode material, the small-area flat lamp (FL) was sealed and fabricated. And the manufacture process for the whole FL was also presented in detail. The pyrolysis process was adopted to grow CNT film directly over the silicon substrate, and the chromium was deposited on the silicon substrate back surface to form the interface layer. After the sintering process for the screen-printed silver slurry, the patterned cathode electrodes were formed on the cathode back plane surface. Using silver slurry as adhesion material, the silicon substrate would be fixed on the cathode electrode. With the splicing method, the CNT film cathode could also be extended on the flat cathode back plane surface. The fabricated small-area FL using CNT film cathode exhibited better field emission property and high luminance brightness.