Patent ID: 7359630

Claim:
An evaporation source heated by applied electric power, heating an evaporation material retained in the evaporation source, and emitting a vaporized evaporation material to form an evaporation material layer on a substrate, comprising: a cell retaining the evaporation material therein; a cell cap installed on the upper part of the cell, and having a cell cap aperture for emitting the vaporized evaporation material; an external wall placed outside of the cell to support a heating means set up at the outside of the cell; a cover placed on the cell cap, fixed to the upper end of the external wall, and having a cover aperture corresponding to the cell cap aperture; and an upper reflector and a lower reflector having an upper aperture and a lower aperture corresponding to the cover aperture in the center thereof, and placed above the cover to prevent heat from being emitted to the outside of the cover, wherein the upper reflector is placed above the lower reflector, wherein the upper reflector has a plurality of projections on the lower surface thereof, and the lower reflector has a plurality of recesses on the upper surface thereof to retain the projections of the upper reflector.