Patent ID: 9236254
Filing Date: 2016-01-12
CPC Classification: H01L

Claim Text:
1. A method of thin film formation, the method comprising: preparing a substrate; forming a thin film above the substrate; and crystallizing the thin film by irradiating the thin film with a light beam, wherein the crystallizing includes steps of: (a) crystallizing the thin film in a first region into a first crystalline thin film by irradiating the first region while scanning a first light beam relative to the substrate, the first region including at least one of (i) edge portions of the substrate and (ii) a region through which a cutting line passes when the substrate is cut, the first light beam satisfying a first condition; and (b) subsequently crystallizing the thin film in a second region into a second crystalline thin film by irradiating at least the second region while scanning a second light beam relative to the substrate, the second region being different from the first region, the second light beam satisfying a second condition different from the first condition, and the thin film has a higher absorption ratio of the second light beam than an absorption ratio of the second light beam of the first crystalline thin film.