Patent ID: 9259805
Filing Date: 2016-02-16
CPC Classification: B23K,H01L

Claim Text:
1. A method of manufacturing a mask for evaporation, comprising: disposing a master substrate on a top surface of a work stage; disposing a first division mask and a second division mask on the master substrate; aligning the first division mask and the second division mask by using a camera installed in a supporter moving along a guide bar; fixing the first and second division masks to the master substrate with a first clamp and a second clamp, respectively, which are disposed on the work stage, each of the first division mask and the second division mask directly contacting the master substrate, an air gap being formed between the first division mask and the second division mask, the first clamp directly contacting the first division mask and the master substrate, the second clamp directly contacting the second division mask and the master substrate; disposing a pressing plate on peripheral regions of the first and second division masks to be welded, the first and second division masks being disposed between the pressing plate and the master substrate; pressing the first and second division masks onto the master substrate with a first roller installed in the supporter while moving into a welding direction; applying a laser beam generated from a laser welding part installed in the supporter to the air gap between the first and second division masks to weld the first division mask to the second division mask, a beam profile of the laser beam generated from the laser welding part having a plurality of maximum peaks, the beam profile being defined as an intensity of the laser beam as a function of a cross-sectional position to be welded, wherein a welding portion is formed between the first division mask and the second division mask after welding the first division mask to the second division mask; and planarizing a top surface of the welding portion with a second roller installed in the supporter while moving into a welding direction, the second roller following the laser welding part, the laser welding part installed between in the first roller and the second roller.