Patent ID: 8709163

Claim:
A method of descaling a deposition mask, the method comprising: providing a deposition mask, the deposition mask comprising: a pattern comprising an opening, wherein the opening is configured to pass a material there though to be deposited onto a substrate; and a thin film of the material attached to the deposition mask; directing a laser beam with a pulse frequency of about 60 Hz and a pulse strength of about 600 mJ to about 900 mJ onto the material attached to the deposition mask to weaken the bonds between the material and the mask; removing the material attached to the mask, comprising: immersing the deposition mask in deionized water, wherein immersing comprises directing an ultrasonic wave into the deionized water while the deposition mask is immersed in the deionized water; immersing the deposition mask in a liquid organic solvent; and drying the deposition mask using an air knife.