Patent ID: 6815315
Filing Date: 2004-11-09
Classification: C25D,H01J,H01L

Abstract:
A method of performing electrochemical oxidation to a semiconductor layer, wherein an electrode provided on an opposite side of a principal surface to be electrochemically oxidized of said semiconductor layer is used as an anode, and a current is supplied between said anode and a cathode while allowing said semiconductor layer and said cathode to be in contact with an electrolytic solution, to oxidize said semiconductor layer, said method comprising:supplying a current between said anode and said cathode to initiate said oxidation; and terminating said oxidation under such condition that a corrected voltage value Vt determined by correcting a voltage V between said anode and said cathode in accordance with a voltage inclement V0 based on a pre-detected resistance of said electrolytic solution is equal to a predetermined upper voltage value V1.