Patent ID: 6764886
Filing Date: 2004-07-20
Classification: H01L

Abstract:
A manufacturing method of semiconductor device provided with a thin film transistor over a substrate having an insulation surface, comprising:forming a non-monocrystal semiconductor over said substrate; forming a marker and an island-like semiconductor layer A, which is a specific area including an area to become an active layer of said thin film transistor, in said non-monocrystal semiconductor in accordance with a layout information of said thin film transistor; forming a crystallization area by irradiating a laser beam selectively to said island-like semiconductor layer A using said marker as a positional reference; and etching a periphery area of said island-like semiconductor layer A to form an island-like semiconductor layer B, which becomes an active layer area of said thin film transistor, wherein said laser beam is a laser beam of pulse oscillation, and the pulse width of said laser beam of pulse oscillation is 50 ns or more.