Patent ID: 7413628

Claim:
A substrate treatment apparatus comprising: a substrate holding mechanism comprising a first clamping member set including at least two clamping members, and a second clamping member set provided separately from the first clamping member set and including at least two clamping members; a rotative drive mechanism for rotating the substrate holding mechanism; a first clamping member drive mechanism for driving the first clamping member set; a second clamping member drive mechanism for driving the second clamping member set; and a controller for independently controlling the first clamping member drive mechanism and the second clamping member drive mechanism; wherein the substrate holding mechanism comprises a rotary member including a rotary shaft rotatively driven by the rotative drive mechanism, a first substrate clamping mechanism including the first clamping member set, and a second substrate clamping mechanism including the second clamping member set, wherein the first clamping member drive mechanism comprises a first non-rotative movable member which is movable parallel to the rotary shaft, a first driving mechanism for moving the first non-rotative movable member parallel to the rotary shaft, a first rotative movable member which is movable parallel to the rotary shaft in association with movement of the first non-rotative movable member by a driving force received from the first non-rotative movable member and is rotatable together with the rotary member, and a first movement converting mechanism for converting movement of the first rotative movable member into movement of the first substrate clamping member set, wherein the second clamping member drive mechanism comprises a second non-rotative movable member which is movable parallel to the rotary shaft, a second driving mechanism for moving the second non-rotative movable member parallel to the rotary shaft, a second rotative movable member which is movable parallel to the rotary shaft in association with movement of the second non-rotative movable member by a driving force received from the second non-rotative movable member and is rotatable together with the rotary member, and a second movement converting mechanism for converting movement of the second rotative movable member into movement of the second substrate clamping member set.