Patent ID: 9134624
Filing Date: 2015-09-15
Classification: G03F

Abstract:
1. A scanning and exposing method for a lithography machine containing a wafer stage carrying a wafer to be exposed and a reticle stage carrying a reticle mask, a region on the wafer to be exposed being divided into two or more exposure shots, the method comprising: stepping the wafer stage to a first exposure shot; moving the wafer stage and the reticle stage synchronously in opposite directions respectively for scanning and exposing the first exposure shot, wherein: during the scanning and exposing of the first exposure shot, the speed curves of the wafer stage and the reticle stage are sinusoidal curves, and magnitudes of the speeds of the wafer stage and the reticle stage gradually increase from zero to maximum values and then decrease to zero respectively, the ratio of the magnitude of the speed of the wafer stage to the magnitude of the speed of the reticle stage is equal to a ratio of a size of a pattern finally is formed on the wafer to a size of a pattern of the reticle mask, and during the scanning and exposing of the first exposure shot, a light intensity, of a light source for exposing, and the magnitudes of the speeds of the wafer stage and the reticle stage change synchronously, and a variation curve of magnitude of the light intensity versus time is a sinusoidal curve.