COMPOSITE SUBSTRATE, THIN FILM EL ELEMENT USING IT, AND METHOD OF PRODUCING THE SAME

摘要

A composite substrate that can be simply produced without causing irregularities in an insulation layer surface ascribable to the influence of an electrode layer and without requiring grinding process or sol-gel process and that, when applied to thin film light emitting elements, provides high display quality; a thin film EL element using it; and a method of producing the same. The composite substrate comprises a substrate, an electrode layer embedded in this substrate and formed such that it is flush with the surface of the substrate, and an insulation layer formed on the composite surface between the substrate and the electrode layer, and formed on the composite substrate are a light emitting layer, an insulation layer and an electrode layer, thereby forming a thin film EL element.