Patent ID: 7799186

Claim:
A plating apparatus having a plating tank, which plating tank comprising: an opening on which an object to be plated is placed; a solution-supply tube for supplying a plating solution toward the object to be plated; an anode positioned opposed to the object to be plated; and a diaphragm for isolating the object to be plated from the anode, wherein an inner wall of the plating tank is provided with a diaphragm-periphery fixing part for fixing a peripheral end of the diaphragm, the solution-supply tube is composed of a dual tube consisting of an inner tube and an outer tube, the inner tube has an inner tube part allowed to pass through a through-hole formed at a center of the diaphragm and a diaphragm through-hole fixing part for fixing the through-hole, and the outer tube has an engaging part for fixing the inner tube with the inner tube part accommodated and further has a tank-fixing part to be fixed in the plating tank, and wherein when said inner tube has been fixed to said outer tube, there is formed a diverging solution flow path between the inner wall of the outer tube and the outer wall of the inner tube, for supplying a plating solution to the anode chamber which is formed by separating from the object to be plated by use of the diaphragm.