The nanocrystalline diamond film (NCDF) was screen-printed on the glass substrates. The diamond paste of printing was fabricated by mixing nanographite. High-temperature reached 573K thermal-sintering technique and the 600 K and10mins anneal-treatment was explored. SEM images shown that the surface morphology of NCDF was improved, and nanocrystalline diamond emitters exposed from NCDF through the special thermal-sintering technique and anneal-treatment process. Edges and corners of nanocrystalline diamond are natural electron emitters. The electron emission was measured in every condition under 10−6pa pressure. The result indicated that electron transfer and electron emission of NCDF were improved by thermal treatment process.

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