Patent ID: 6309508
Filing Date: 2001-10-30
Classification: C23C

Abstract:
A method for evaporating an organic liquid and vapor depositing the organic liquid onto a substrate comprising:heating an evaporator surface to a temperature above an evaporation temperature of the organic liquid when in contact with the evaporator surface and below a temperature which would cause the polymerization or degradation of the liquid when the liquid is in contact with the evaporator surface,rotating the evaporator surface at a speed that generates a centrifugal force on the liquid that spreads the liquid outwardly across the evaporator surface in a layered form that minimizes the existence of a temperature gradient within the liquid layer,delivering liquid to be evaporated to the center of the top face of the evaporator surface such that a constant vapor flow from the evaporator surface is generated,evaporating the delivered liquid, andvapor depositing the evaporated liquid onto the substrate.