Patent ID: 8367301

Claim:
A method of crystallizing with a mask comprising: irradiating a laser beam onto a silicon substrate through a mask along a first direction, the mask including a first pattern part, a second pattern part and a third pattern part, the first, second and third parts including a plurality of unit blocks transmitting a portion of light and blocking a portion of the light to selectively crystallize silicon, and at least two of the first, second, and third pattern parts having a corresponding pattern to each other; moving an irradiating position along a second direction substantially perpendicular to the first direction at two third length of a height of the mask; irradiating the laser beam onto the silicon substrate through the mask in the first direction to overlap a first area patterned with the third pattern part of the mask at the first irradiation and a second area patterned with the first pattern part of the mask at the second irradiation.