Patent ID: 6440785
Filing Date: 2002-08-27
Classification: C23C,G02B,H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:preparing a semiconductor film over a substrate; preparing a laser beam having a cross section perpendicular to propagation of the laser beam; modifying the laser beam so that the cross section of the laser beam is increased in a first direction and reduced in a second direction perpendicular to said first direction; and irradiating the semiconductor film with the modified laser beam; and changing a relative location of the semiconductor film with respect to the modified laser beam in the second direction, wherein the modification of the laser beam comprises: expanding the cross section of the laser beam only in the first direction; homogenizing an energy distribution of the laser beam only in the first direction; homogenizing an energy distribution of the laser beam only in the second direction; and condensing the cross section of the laser beam only in the second direction.