Patent ID: 9725798
Date: 2017-08-08
CPC Classifications: C23C,H01J

Claim:
1. A method of manufacturing a display device, the method comprising: inserting a substrate on which a display portion is formed on a display area into a chamber, wherein the display portion has top and bottom surfaces opposing each other, and a side surface interconnecting the top and bottom surfaces; placing a mask over the display area; and spraying plasma onto the substrate so as to etch a non-display area of the substrate, wherein the mask comprises: a body portion arranged over the display area and having first and second ends opposing each other; and a protrusion portion extending towards the substrate from the first and second ends of the body portion to prevent the plasma from flowing into the space between the substrate and the body portion, wherein the protrusion portion is configured to surround at least a portion of the side surface of the display portion, wherein the mask has upper and lower surfaces opposing each other, wherein the lower surface faces the display portion and the substrate, wherein each of the first and second ends of the body portion has upper and lower portions, wherein the protrusion portion extends from the lower portion of each end, and wherein the upper portion of each end is inclined with respect to the remaining portion of the upper surface of the mask.