Preparation method of cathode isolation column of organic light emitting display

Abstract

The invention discloses a preparation method of a cathode isolation column of an organic light emitting display (OLED). The preparation method comprises the following steps: firstly, preparing a coining mold, and obtaining a predesigned convex structural pattern on the mold; uniformly applying a layer of ultraviolet solidification glue on an ITO substrate, and allowing the ultraviolet solidification glue to freely flow to be flat and form a coining layer; pressing the mold in the coining layer, filling the convex structural pattern of the mold with the ultraviolet solidification glue, and through exposure, enabling the ultraviolet solidification glue to have a reaction to be hardened and formed; releasing pressure to separate the mold from the ITO substrate; performing reactive ion etchingon the ITO substrate to remove remained ultraviolet solidification glue, and obtaining a convex structure of which the ratio is the same as that of the mold; inverting the ITO substrate, adhering theultraviolet solidification glue to the top of the convex structure through a micro contact method, and performing standing forming; and performing irradiation solidification with an UV light source,so as to obtain the cathode isolation column. According to the preparation method disclosed by the invention, an ultraviolet coining technology is adopted, so that the cathode isolation column is prepared under room temperature and constant pressure; the preparation method is simple in technology and few in steps, and besides, moisture cannot be introduced; the device life of the OLED is greatly prolonged; and the pixel resolution is obviously increased.

Description

technical field [0001] The invention relates to a technology for a cathode isolation column of an organic light-emitting display device, in particular to a preparation method for a cathode isolation column of an organic light-emitting display device. Background technique [0002] OLED (Organic Light Emitting Display), an organic light-emitting display device, has attracted extensive attention and in-depth research due to its characteristics of high brightness, wide viewing angle, flexibility and light weight. An organic light-emitting device generally consists of a first electrode (transparent anode), a luminescent medium deposited on the first electrode, and a second electrode (cathode) deposited on the luminescent medium. In order to achieve high resolution and colorization of passive matrix OLEDs, and better solve the problems of low cathode template resolution and low device yield, people have introduced stripe structures with inverted trapezoidal or T-shaped cross-secti...

AI Technical Summary

Problems solved by technology

The above-mentioned preparation method is produced by a secondary exposure process. After etching, there will always be water vapor left in the cathode spacer column, or there will always be water vapor diffused and evaporated on the surface of the cathode spacer column. Influence, pixel shrinkage occurs along the direction of the cathode isolation column, which affects the life of the light-emitting device

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