Electrochemical removal of material in electron-emitting device

摘要

An electrochemical procedure is employed to selectively remove certain material from a structure without significantly electrochemically attacking other material of the same chemical type as the removed material. The material to be removed constitutes part or all of an electrically non-insulating region (52C). The material which is of the same chemical type as the removed material but which is not to be significantly electrochemically attacked during the removal procedure constitutes part or all of another electrically non-insulating region (52A) electrically decoupled from the first-mentioned non-insulating region. The electrochemical removal procedure is performed with an organically based electrolytic solution containing organic solvent and acid. The electrochemical removal procedure is typically assisted with an impedance component (42B) having characteristics designed to overcome electrical short problems between the material to be removed and the material not to be significantly electrochemically attacked.