Patent ID: 7863541
Filing Date: 2011-01-04
Classification: B23K,C21D,H01L

Abstract:
1. A semiconductor device manufacturing method comprising: forming a semiconductor film over a substrate having an insulating surface; irradiating said semiconductor film with a laser beam aslant to said semiconductor film while moving said substrate at a constant rate in a first direction by moving a slider wherein the substrate is provided over the slider; moving said substrate in a second direction perpendicular to said first direction by a distance smaller than a width of said laser beam; irradiating said semiconductor film with said laser beam aslant to said semiconductor film while moving said substrate in a third direction parallel and opposite to said first direction; and moving said substrate in said second direction by a distance smaller than said width of said laser beam, wherein the slider is moved in a non-contact manner, and wherein said steps of irradiating said semiconductor film with said laser beam while moving said substrate in said first direction, moving said substrate in said second direction, irradiating said semiconductor film with said laser beam while moving said substrate in said third direction, and moving said substrate in said second direction are continuously repeated.