Patent ID: 7588974
Filing Date: 2009-09-15
Classification: G05B,Y02P

Abstract:
1. A method of manufacturing a semiconductor device comprising steps of: forming a semiconductor film provided with a marker in accordance with information on computer aided design masks for forming a thin film transistor including a source, channel and drain over a substrate; extracting a positional and directional information of the source, channel and drain for selectively irradiating the semiconductor film with a laser beam from the information on computer aided design masks; storing the positional and directional information in a database; obtaining an optimum driving condition of a laser system for minimizing laser treatment time by considering speed of drive of the laser system and time required for changing drives of the laser system in accordance with the positional and directional information stored in the database; controlling a position to be scanned with the laser beam in accordance with a position of the marker so that a scanning direction with the laser beam becomes parallel with a direction in which carriers move in the channel; and controlling the laser system in accordance with the optimum driving condition of the laser system, thereby selectively irradiating the semiconductor film with the laser beam.