Electric heating – Metal heating – By arc
Reexamination Certificate
2005-03-29
2005-03-29
Elve, M. Alexandra (Department: 1725)
Electric heating
Metal heating
By arc
C219S121780
Reexamination Certificate
active
06872910
ABSTRACT:
There is provided an optical system for reducing faint interference observed when laser annealing is performed to a semiconductor film. The faint interference conventionally observed can be reduced by irradiating the semiconductor film with a laser beam by the use of an optical system using a mirror of the present invention. The optical system for transforming the shape of the laser beam on an irradiation surface into a linear or rectangular shape is used. The optical system may include an optical system serving to convert the laser beam into a parallel light with respect to a traveling direction of the laser beam. When the laser beam having passed through the optical system is irradiated to the semiconductor film through the mirror of the present invention, the conventionally observed faint interference can be reduced. Besides, the optical system which has been difficult to adjust can be simplified.
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Nakaya Tomoko
Tanaka Koichiro
Elve M. Alexandra
Robinson Eric J.
Robinson Intellectual Property Law Office P.C.
Semiconductor Energy Laboratory Co,. Ltd.
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