Patent ID: 9548638
Date: 2017-01-17
CPC Classifications: B23Q,H02K

Claim:
1. An alignment stage, comprising: a base plate fixed to a base; one or more X direction thrust generation guide mechanisms disposed on the base plate, and configured to generate thrust and to perform guidance in a direction of a straight line X; a pair of lower plates disposed above the X direction thrust generation guide mechanisms, and configured to horizontally move in the direction of a straight line X; a pair of upper plates provided corresponding to the pair of lower plates, respectively; a pair of rotatable bearings configured to realize relative free movement of the upper plates with respect to the lower plates in a direction of rotation θ by being disposed between respective upper and lower plates of the pair of lower plates and of the pair of upper plates; one or more Y direction thrust generation guide mechanisms disposed above at least one of the pair of upper plates, configured to generate thrust and to perform guidance in a direction of a straight line Y perpendicular to the direction of a straight line X, a plurality of the Y direction thrust generation guide mechanisms being provided when one of the X direction thrust generation guide mechanisms is provided, and one or more Y direction thrust generation guide mechanism being provided when a plurality of the X direction thrust generation guide mechanisms is provided; and a table plate configured to move a mounted object placed on an upper surface in the direction of a straight line X, in the direction of a straight line Y, and in the direction of rotation θ by being disposed above the Y direction thrust generation guide mechanism, and in an initial state, the base plate and the table plate are completely overlapped and arranged so that a deviation amount is not caused in a top view.