Patent ID: 7915099
Filing Date: 2011-03-29
Classification: B23K,H01L

Abstract:
1. A method for manufacturing a thin film transistor comprising the steps of: irradiating a semiconductor film with an energy beam through an fθ lens while turning a mirror so that the energy beam is applied selectively to the outside of a first element forming region and a second element forming region when a scanning speed is not constant; forming the first element forming region and the second element forming region using portions of the irradiated semiconductor film; forming a gate electrode in the first element forming region and a gate electrode in the second element forming region over the irradiated semiconductor film; and forming an impurity region in the first element forming region and an impurity region in the second element forming region in the irradiated semiconductor film using each gate electrode as a mask, wherein a scanning row of the energy beam changes outside and between the first element forming region and the second element forming region.