Patent ID: 8551313
Filing Date: 2013-10-08
Classification: C25D,H01L

Abstract:
1. An electrochemical process comprising: immersing the face or part of the face of an SOI wafer to be electroplated into an electrolytic solution but not immersing the backside of the wafer (which is the surface of the wafer opposite the face to be electroplated) into the electrolytic solution, wherein the wafer has a buried oxide thickness of about 500 Å to about 1500 Å; positioning one or more anodes in front of the face of the wafer to be electroplated but not touching the wafer; positioning one or more cathodes in front of the face of the wafer to be electroplated but not touching the wafer; separating the anodes and cathodes from one another by an insulator, except for the ends, which face the face of the wafer to be electroplated; applying an electric power source to the anode and the cathode; and directly illuminating the backside of the wafer with an electron source but not illuminating electrolyte solution behind the backside of the wafer.