Patent ID: 8591223
Filing Date: 2013-11-26
Classification: B01B,B05D,C23C

Abstract:
1. An evaporator for vaporizing an organic material to be deposited on a flexible substrate comprising: an evaporation tube having a wall encompassing a cavity for vaporizing the organic material; at least one heating device arranged adjacent to the wall and being adapted to heat the evaporation tube; at least one nozzle assembly protruding from the evaporation tube, wherein the nozzle assembly further comprises a nozzle cover with an opening; and a shutter for selectively closing the opening of the nozzle cover by contacting the nozzle cover and opening the opening of the nozzle cover, wherein the shutter is adapted to have, during operation of the evaporation tube, a temperature within a shutter temperature range of 140° C. such that the temperature of the nozzle cover is within the shutter temperature range.