Estimation of Probable Occurrence of Earthquake in Chandigarh Region, India

A method for making an electron emission device, which includes a conductive film having an electron emitting section disposed between a pair of electrodes, includes a removal step for removing impurities in a organic substance, and a voltage-applying step for applying an voltage to the conductive film through the electrodes in an atmosphere containing the organic substance. The electron emission device is suitable for an electron beam source in an image forming apparatus.