Patent ID: 7249990

Claim:
A manufacturing method of an electron-emitting device, including a first electrode having a plurality of fibers and a second electrode located at a distance from the first electrode, and emitting an electron into a vacuum space from one or more of fibers not short-circuiting between the first and second electrodes, comprising: a step of preparing the first electrode including a plurality of fibers each containing carbon and the second electrode; a step of measuring a current flowing between the first electrode and the second electrode and/or a current flowing between the first electrode and an electrode opposed to the first electrode and the second electrode; and a step of preparing the fibers not short-circuiting between the first and second electrodes by ablating one or more of fibers short-circuiting between the first and second electrodes by flowing a current into the one or more of fibers short-circuiting between the first and second electrodes.