Megapixel laser chips for high-density emitter arrays

A method of manufacturing an electron-emitting device including an electroconductive film having an electron emission portion and arranged between electrodes, and methods of manufacturing an electron source and an image forming apparatus each including the electron-emitting device. The step of forming the electroconductive film has the step of applying a solution containing an organic metal compound including a metal element and an amino acid group and water to a portion between electrodes arranged on a substrate by using an ink-jet method which gives heat to the solution to discharge the solution, drying the applied solution, and then decomposing the compound.