Patent ID: 7301275
Filing Date: 2007-11-27
Classification: H01L

Abstract:
1. An organic electroluminescence (EL) display unit comprising: an insulating substrate having a first surface; plural pixels on the first surface, each of the pixels including a non-light emitting area and a light emitting area, the first surface having a step between the light emitting area and at least a portion of non-light emitting area, and the first surface in the light emitting area being higher than in the at least a portion of non-light emitting area; an organic EL element in the light emitting area and a TFT in the non-light emitting area; and an edge cover film over the non-light emitting area and having a window exposing the organic EL element, the edge cover film having a taper at an edge adjacent to the window, the step having a height so that an angle of the taper is equal to or smaller than about 30°, wherein the substrate includes a flat base whose surface defines the first surface in the non-light emitting area and a step alleviation film on the flat base that defines the first surface in the light emitting area and the step; and wherein the TFT includes a gate insulation film and wherein the gate insulation film extends into the luminescence area and is directly on the first surface of the step alleviation film and on a sidewall of the step.