Patent ID: 7947163

Claim:
A method of selectively removing portions of a metal layer from a substrate during fabrication of an electronic device, the method comprising: providing a counterelectrode above an additive layer above a metal layer located on a substrate surface, wherein the additive layer comprises accelerator; generating a positive voltage bias in said metal layer located on said substrate; providing a high-resistivity electrolyte liquid on said substrate surface; providing a cationic membrane; providing a low-resistivity electrolyte liquid between said cationic membrane and said counterelectrode; contacting said substrate surface with a contact surface of a cationic membrane, said contact surface comprising a membrane pattern comprising raised and recessed areas, the membrane pattern corresponding to said desired metal pattern, thereby substantially displacing said high-resistivity electrolyte liquid from said substrate surface and thereby forming a pocket of high-resistivity liquid electrolyte between said cationic membrane and said substrate corresponding to a negative portion on said membrane contact surface; and removing portions of the additive layer under the pocket by anodic dissolution.