Patent ID: 9070904
Filing Date: 2015-06-30
Classification: H01L

Abstract:
1. A method for manufacturing an organic light emitting diode (OLED) display, the method comprising: sequentially stacking an impurity-doped first amorphous silicon layer, a gate insulating layer, and an impurity-non-doped second amorphous silicon layer on a substrate; forming a first polysilicon layer and a second polysilicon layer by crystallizing the first and the second amorphous silicon layers, respectively; forming a first polysilicon layer pattern, a gate insulating layer pattern, and a second polysilicon layer pattern intermediate in the same pattern by patterning the first polysilicon layer, the gate insulating layer, and the second polysilicon layer; sequentially stacking an impurity-doped third amorphous silicon layer and a data metal layer on the second polysilicon layer pattern intermediate; forming a photosensitive film pattern on the data metal layer, the photosensitive film pattern including a plurality of units with different thicknesses; and forming a second polysilicon layer pattern, a third amorphous silicon layer pattern, and a data metal layer pattern by patterning the second polysilicon layer pattern intermediate, the third amorphous silicon layer, and the data metal layer through the photosensitive film pattern, wherein forming the second polysilicon layer pattern, third amorphous silicon layer pattern, and data metal layer pattern includes: wherein: wherein the photosensitive film pattern includes a first thickness unit, a second thickness unit thinner than the second thickness unit, and an opening having no thickness.