Patent ID: 7582002

Claim:
A manufacturing method of an electron-emitting device having a pair of electroconductive members arranged on a substrate with a gap and a film which contains carbon as a main component and covers each of said pair of electroconductive members, comprising a step of applying voltage pulses of both first and second polarities across said pair of electroconductive members arranged on said substrate with the gap in an atmosphere containing carbon compound gases, wherein in said voltage pulses of both first and second polarities, there is a sequence of time periods comprising a first voltage pulse period (T 1 ) during which a voltage pulse of the first polarity is being applied, a first quiescent period (T 2 ) until a voltage pulse of the second polarity is applied after applying the voltage pulse of the first polarity, a second voltage pulse period (T 3 ) longer than the first voltage pulse period (T 1 ) during which a voltage pulse of the second polarity is being applied, and a second quiescent period (T 4 ) longer than the first quiescent period (T 2 ) until a next voltage pulse of the first polarity is applied after applying the voltage pulse of the second polarity, wherein the second polarity is the same polarity as that of the voltage pulse applied to the electron emitting device when driving the electron emitting device to emit electrons from the electron emitting device and the first polarity is opposite to the second polarity.