Patent ID: 8608855

Claim:
An electrode cover comprising: a first portion configured to cover a first side surface of a first electrode, the first side surface facing to an evaporation source holder which is configured to hold an evaporation material; a second portion configured to cover an upper portion of the first electrode, to hold the evaporation source holder by sandwiching the evaporation source holder with a second electrode located over the first electrode, and to electrically connect the evaporation source holder to the first electrode; and a third portion configured to be apart from the first electrode so that the first portion is arranged closer to the evaporation material than the third portion when the electrode cover is attached to the first electrode, wherein the second portion comprises a hole to bolt the first portion to the first electrode, and wherein the third portion is a face inclined with respect to a second side surface of the first electrode, wherein the second side surface is substantially perpendicular to the first side surface.