Patent ID: 7569124

Claim:
An anodic oxidation apparatus, comprising: a lamp which emits light; a treatment bath which has a stage capable of mounting a target substrate thereon with a treatment part thereof directed upward and provided at a position where the emitted light reaches and a frame located on the stage; a cathode electrode which is provided on the way of the emitted light to reach the mounted target substrate and includes an opening to allow the light to pass therethrough; a seal member which establishes a liquid sealing property between the frame and the mounted target substrate; a conductive contact member which is provided to be contactable with a plurality of electrode patterns formed substantially in parallel on the target substrate outside an annular shape of said seal member and moves perpendicular to the electrode patterns along side of the mounted target substrate continuously, the conductive contact member having a longer length to contact with the electrode patterns in a direction of movement than an interval of the electrode patterns; and a current source which is electrically connected to said contact member and sets an output current value in accordance with the number of electrode patterns of the mounted target substrate in contact as said contact member moves.