Patent ID: 7724382
Filing Date: 2010-05-25
Classification: G01N,H01L

Abstract:
1. A method comprising: scanning a semiconductor film on a substrate with laser having a specific lasing frequency at a plurality of irradiation intensities to form a plurality of irradiation areas on the semiconductor film each corresponding to one of said irradiation intensities; illuminating said plurality of irradiation areas in block to receive light reflected from said irradiation areas in block; judging a microcrystallization intensity based on said received reflected light; determining an irradiation intensity based on said microcrystallization intensity; scanning another semiconductor film with laser having said lasing frequency at said determined irradiation intensity to form a crystallized film; and forming a semiconductor device on said crystallized film, wherein said judging includes: comparing chromaticities of said received reflected light measured for said irradiation areas, against one another; detecting a maximum change in the chromaticity per unit change of said irradiation intensity; and determining said microcrystallization intensity based on said maximum change.