Patent ID: 9081272
Filing Date: 2015-07-14
Classification: B82Y,G01Q,G03F

Abstract:
1. A leveling apparatus that levels an object with a substrate such that one side of the object is brought in parallel contact with a surface of the substrate, the leveling apparatus comprising: force sensors disposed to measure force at at least three points on a side of the object not in contact with the surface of the substrate; an angle adjusting unit disposed to adjust a relative angle between the object and the surface of the substrate; and a controller connecting with the force sensors and the angle adjusting unit to drive the angle adjusting unit on the basis of data from the force sensors, wherein the controller obtains the data on force applied to each of the force sensors by bringing one side of the object in contact with the surface of the substrate at a predetermined angle, calculates a degree of relative inclination between the object and the surface of the substrate from the data on force, and levels the object with the surface of the substrate by adjusting the angle of the object or the substrate with the angle adjusting unit on the basis of the degree of relative inclination, and wherein the controller calculates a coordinate of an average force on the basis of the coordinates of the force sensors and the data on force applied to the force sensors and controls the angle adjusting unit such that the calculated coordinate of the average force becomes the same as a pre-determined coordinate.