Patent ID: 6956692
Filing Date: 2005-10-18
Classification: G01D

Abstract:
1. A method for controlling exposure of a surface of a substrate in a process of structuring the substrate with light of a predetermined intensity, the light being directed to the surface by means of a deflectable mirror, the intensity having a first maximum at a first deflection of the deflectable mirror, a first minimum at a second deflection of the deflectable mirror, a second maximum at a third deflection of the deflectable mirror, and a second minimum at a fourth deflection of the deflectable mirror, the method comprising: receiving a signal representing the predetermined intensity; receiving a signal representing a threshold intensity, the threshold intensity being equal to or less than the intensity of the second maximum; determining whether the predetermined intensity is greater than the threshold intensity; and controlling the deflection of the deflectable mirror to be between the first deflection and the second deflection when the predetermined intensity is greater than the threshold intensity, and to be equal to or greater than the third deflection when the predetermined intensity is equal to or less than the threshold intensity.