Patent ID: 8696808
Filing Date: 2014-04-15
Classification: B23K,H01L,Y10T

Abstract:
1. A manufacturing method for a semiconductor device comprising: forming a semiconductor film over a substrate; outputting a plurality of laser lights from a plurality of laser oscillation apparatuses; forming a first beam spot by partially overlapping beam spots of the plurality of laser lights; controlling a width of a slit by a computer; cutting a low energy density of the first beam spot by the slit; scanning the semiconductor film with the first beam spot in a first direction; scanning the semiconductor film with a second beam spot in a second direction after the scanning in the first direction, and wherein the first direction is set perpendicular to the second direction, wherein the first direction is set parallel to a direction in which carriers move in channel formation regions in a thin film transistors, and wherein the first beam spot is scanned after cutting the low energy density of the first beam spot to a region of the semiconductor film determined by a pattern information.