Patent ID: 7311781

Claim:
A substrate rotation type treatment apparatus causing a substrate to rotate to make substrate treatment comprising: substrate holding means for holding the substrate in a horizontal posture; substrate rotation means for causing the substrate that is held by said substrate holding means to rotate about a vertical axis; treatment liquid supply means for supplying a treatment liquid to a surface of the substrate held by said substrate holding means; and a cup having a container shape of which top is open, which is disposed so as to surround the sides and the under side of the substrate held by said substrate holding means, and which serves to collect a treatment liquid to be diffused from the substrate to the surroundings; wherein said cup is made of polyvinyl chloride, and at least a portion of an inside wall surface of said cup on which a treatment liquid having been diffused from the substrate to the surroundings impinges is roughened to be a hydrophilic surface by plasma treatment so that a contact angle is not more than 10°.