| 摘要 |
The laser beam projection mask 14 has three rectangular-shaped slits 25, 26, 27 as transmission areas. These three slits 25, 26, 27 are formed in sequence in X direction shown by an arrow X in FIG. 2 C at specified intervals, and the width in the X direction decreases in the order of the slit 25 , the slit 26 and the slit 27 . More particularly, transmission coefficients of the transmission areas change in conformity with a temperature distribution curve V 1 of a silicon film 4 shown in FIG. 2 B.
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