Patent ID: 8729535
Filing Date: 2014-05-20
Classification: H01L

Abstract:
1. An organic EL display panel, comprising: a TFT layer; an interlayer insulation film on the TFT layer and having a plurality of contact holes, each of the plurality of contact holes corresponding to one of a plurality of pixels; a plurality of first electrodes on the interlayer insulation film, each of the plurality of first electrodes corresponding to one of the plurality of pixels and being conductive with the TFT layer via one of the plurality of contact holes; a bank defining a plurality of apertures, at least one of the plurality of apertures corresponding to each of a plurality of colors, and at least one of the plurality of contact holes being located beneath each of the plurality of apertures; a plurality of organic light-emitting layers each in one of the plurality of apertures; and a second electrode above the plurality of organic light-emitting layers, wherein each of the at least one of the plurality of contact holes has an upper periphery and a lower periphery, a cross-sectional area of each of the at least one of the plurality of contact holes increasing from the lower periphery to the upper periphery, each of the at least one of the plurality of contact holes and a region thereabove constitutes a contact hole region, each of the plurality of light-emitting layers is composed of a first layer and a second layer of a same material, the first layer being concaved in conformity with a recess defined by the contact hole, the second layer being layered on the first layer and within the contact hole region, the second layer being concaved in conformity with the first layer, and in each of the plurality of apertures, a thickness of the organic light-emitting layer is greater throughout a portion within the upper periphery of the contact hole region than at a portion outside the contact hole region.