초록 ▼

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 re

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.

대표청구항 ▼

[ We claim:] [1.] A method comprising the steps of:providing an initial structure in which (a) a first electrically non-insulating region comprises first material and (b) a second electrically non-insulating region largely electrically decoupled from the first region comprises the first material; an

[ We claim:] [1.] A method comprising the steps of:providing an initial structure in which (a) a first electrically non-insulating region comprises first material and (b) a second electrically non-insulating region largely electrically decoupled from the first region comprises the first material; andelectrochemically removing at least part of the material of the first region by a procedure that comprises contacting the first material of at least the first region with an electrolytic solution comprising organic solvent and acid such that the first material of the second region is at a sufficiently different potential from the first material of the first region that the first material of the second region is not significantly electrochemically attacked during the removing step.