FIELD: electricity.
SUBSTANCE: device for electron emission includes polycrystalline film from boride lanthanum and size of crystalline grain that forms this polycrystalline film is in the range from 2.5 nm to 100 nm, including range limits; preferably the thickness of polycrystalline film amounts 100 nm or less.
EFFECT: creation of device for emission of electrons of said type with emission under the influence of electric field for application in device for image creation in order to provide continuous electron emission in stable operation at lower working voltage and lower vacuum degree.
12 cl, 19 dwg, 4 tbl
