Patent ID: 9719163
Date: 2017-08-01
CPC Classifications: C23C,C23F,G03F,Y02P

Claim:
1. A method of manufacturing a deposition mask, the method comprising: depositing a first photoresist layer over a substrate; aligning a first photomask with the first photoresist layer and exposing and developing the first photoresist layer to form a plurality of first photoresist patterns having sides that gradually narrow toward the substrate, wherein a portion of the substrate is exposed by the first photoresist patterns; forming a metal layer over the first photoresist patterns and the exposed portion of the substrate; depositing a second photoresist layer over the metal layer; aligning a second photomask with the second photoresist layer and exposing and developing the second photoresist layer to form a plurality of second photoresist patterns between the first photoresist patterns; etching the metal layer to form a pattern hole; removing the first and second photoresist patterns; and separating the substrate from the etched metal layer so as to form a deposition mask.