METHOD FOR PRODUCING A STRUCTURE WITH A TEXTURED EXTERNAL SURFACE, INTENDED FOR AN ORGANIC LIGHT-EMITTING DIODE DEVICE, AND A STRUCTURE WITH A TEXTURED EXTERNAL SURFACE
The invention relates to a method for obtaining a structure with a textured external surface (25, 23, 24) intended for an organic light-emitting device, said structure including a mineral glass substrate (2) having a surface that is provided with protrusions (23') and cavities (24'). Accor...
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Main Authors | , , , |
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Format | Patent |
Language | English French |
Published |
07.10.2010
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Online Access | Get full text |
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Summary: | The invention relates to a method for obtaining a structure with a textured external surface (25, 23, 24) intended for an organic light-emitting device, said structure including a mineral glass substrate (2) having a surface that is provided with protrusions (23') and cavities (24'). According to the method, an etching mask is deposited on the surface (21) of the substrate and the surface of the substrate is etched around the etching mask, followed by the removal of the mask. The invention is characterised in that one of the etching mask preparation steps comprises the formation of a multitude of nodules (60) arranged randomly on the surface of the substrate and formed by a material having no affinity for glass, and in that, following the etching step, the slopes of the protrusions having submicronic heights and widths are smoothed sufficiently to form the thus smoothed textured external surface.
Procédé d'obtention d'une structure à surface externe texturée (25, 23, 24) pour dispositif électroluminescent organique, structure comportant un substrat en verre minéral (2) dont la surface est pourvue d'excroissances (23') et de creux (24'), le procédé comprenant le dépôt d'un masque de gravure sur la surface (21 ) du substrat et la gravure de la surface du substrat autour du masque de gravure, et éventuellement l'élimination du masque, caractérisé en ce que l'une des étapes de préparation du masque de gravure consiste en la formation d'une multitude de nodules (60) agencés de manière aléatoire sur la surface du substrat et constitués d'un matériau ne possédant pas d'affinité avec le verre, et en ce que la structure subit après l'étape de gravure, un adoucissement suffisant des pentes des excroissances de hauteur et de largeur submicroniques obtenues par gravure jusqu'à former la surface externe texturée alors adoucie. |
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Bibliography: | Application Number: WO2010FR50640 |