Patent ID: 8383453

Claim:
A method of manufacturing an organic light emitting display apparatus, comprising: forming first electrodes on a substrate; forming a pixel defining layer (PDL) on the substrate and first electrodes, the PDL including openings exposing predetermined areas of the first electrodes; forming a charge transport layer on the entire PDL and inside the openings of the PDL; performing a hydrophobic process on the charge transport layer; performing a hydrophilic process on the charge transport layer, wherein the hydrophobic process is performed before the hydrophilic process; and wherein the hydrophobic process is performed on an entire upper surface of the charge transport layer; and the hydrophilic process is performed only on portions of the charge transport layer corresponding to the openings such that said portions of the charge transport layer corresponding to the openings are made hydrophilic; forming organic light emitting layers on the charge transport layer; and forming a second electrode electrically connected to the organic light emitting layers.