Patent ID: 6896571

Claim:
A method for manufacturing an electron-emitting device, comprising the steps of: (A) providing a substrate on which a pair of electrodes and a polymer film are arranged, the polymer film connecting the electrodes; (B) reducing a resistivity of the polymer film by irradiating an energy beam onto the polymer film; and (C) forming a gap in a film obtained by reducing a resistivity of the polymer film, wherein, in the step (B), assuming that an energy intensity of the beam given in a unit area in a unit time as W W/m 2 , W satisfies a formula W≧2×T×(ρ sub ·C sub ·λ sub /τ) 1/2 , where T is defined as a temperature ° C. at which the polymer film is heated for one hour in a vacuum degree of 1×10 −4 Pa to reduce a resistivity of the polymer film measured at a room temperature to 0.1 Ω·cm, C sub is a specific heat J/kg·K of the substrate, ρ sub is a specific gravity kg/m 3 of the substrate, λ sub is a thermal conductivity W/m·K of the substrate, and τ is an irradiation time in the range of 10 −9 sec to 10 sec.