Patent ID: 8098006
Filing Date: 2012-01-17
Classification: H01L

Abstract:
1. A color EL display, comprising: a transparent substrate; color filters formed on the transparent substrate; an over coating layer formed on and covering a whole of the color filters to be planarized, a thin film transistor circuit directly formed on the over coating layer; an organic EL layer formed on the thin film transistor circuit; and a common electrode formed on the organic EL layer, wherein the thin film transistor circuit is substantially transparent and comprises a plurality of thin film transistors, wherein each of the plurality of the thin film transistors comprises a gate electrode, a source electrode, a drain electrodes a semiconductor layer and a pixel electrode, wherein the semiconductor layer is formed of an oxide semiconductor containing at least any one of an oxide of In, Ga, Zn, Sn and Mg, and wherein the organic EL layer comprises a hole transport layer directly formed on a whole surface of the pixel electrodes of said plurality of thin film transistors and a white light-emitting layer formed on the hole transport layer, and wherein the thin film transistor circuit comprises two or more semiconductor layers and one insulating layer, wherein the one insulating layer is between the two or more semiconductor layers, and wherein one of the two or more semiconductor layers is formed above the one insulating layer and the other of the two or more semiconductor layers is formed below the one insulating layer.