Patent ID: 9646831
Date: 2017-05-09
CPC Classifications: B23K,H01L

Claim:
1. A method for crystallizing a thin film, the method comprising: providing a thin film having a plurality of device formation regions; generating a line beam having a uniform portion and two edge portions, while continuously translating the thin film semiconductor in a first direction, irradiating a first device formation region with the uniform portion of the line beam having a fluence that is sufficient to partially melt the thin film and the first region re-solidifying and crystallizing to form a first crystallized region; and irradiating a second device formation region, distinct from the first device formation region, with the uniform portion of the line beam having a fluence that is sufficient to partially melt the thin film and the second region re-solidifying and crystallizing to form a second crystallized region; wherein the first and second crystallized portions comprise uniform, isotropic crystal grains and the first crystallized portion has larger crystal grains than the second crystallized portion.