Semiconductor Energy Laboratory Co., Ltd.

Kenichirou Nishida

Atsushi Yoshinouchi

Norihito Kawaguchi

Miyuki Masaki

Ryusuke Kawakami

A laser annealing method for executing laser annealing by irradiating a semiconductor film formed on a surface of a substrate with a laser beam, the method including the steps of, generating a linearly polarized rectangular laser beam whose cross section perpendicular to an advancing direction is a rectangle with an electric field directed toward a long-side direction of the rectangle or an elliptically polarized rectangular laser beam having a major axis directed toward a long-side direction, causing the rectangular laser beam to be introduced to the surface of the substrate, and setting a wavelength of the rectangular laser beam to a length which is about a desired size of a crystal grain in a standing wave direction.

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Tokyo, Japan

Kenichirou Nishida