Screen printing method, screen structure and pressing marker

Abstract

The invention relates to the technical field of screen printing and discloses a screen printing method. The screen printing method includes: providing a screen, wherein the screen comprises a screen frame and screen cloth stretching tight on the screen frame, the screen cloth is provided with a pressing figure mold forming a plurality of grids by cross arrangement of a plurality of parallel warps and a plurality of parallel wefts, and the warps and the wefts are mutually vertical; providing a substrate, attaching the screen to the upper surface of the substrate, applying coating materials on the position corresponding to the pressing figure mold of the screen cloth, and using a scraper to press down to abut against the screen cloth prior to moving the scraper so as to enable the coating materials to be distributed according to the pressing figure mold, wherein the latitude line of the scraper and the pressing figure mold forms a first included angle, the longitude line of the scraper and the pressing figure mold forms a second included angle, and neither the first included angle or the second included angle is zero degree; removing the screen to form printing patterns on the substrate. The invention further provides a screen structure and a pressing marker, and reject ratio of screen printing can be reduced.

Description

technical field [0001] The invention relates to the technical field of screen printing, in particular to a screen printing method, a screen structure and an embossing device. Background technique [0002] In the production process of OLED screen (Organic Light Emitting Diode), it is necessary to coat the substrate (back glass) with multi-layer materials, and in the process of forming the mask layer, use screen printing to form the required printing pattern . The screen plate includes a screen frame and a mesh cloth stretched on the screen frame. There is an embossing pattern on the mesh cloth. The embossing pattern consists of multiple parallel warp lines and multiple parallel weft lines crossed to form multiple grids. , and the warp and weft are perpendicular to each other; the embossing pattern is generally made of glass glue, which isolates the immersion of oxygen and moisture from the outside, and better extrudes the coating material to improve the high life of the OLED...

AI Technical Summary

Problems solved by technology

The scraper in the prior art is parallel to the weft (longitude) lines of the embossing pattern. During the embossing process, the scraper is in contact with multiple warp (weft) lines at the same time, and the pressure on each warp (weft) line is relatively consistent. , while the scraper moves from one side of the weft line of the embossing pattern to the other side, the scraper is in contact with the weft line in a large area, so that the force on both sides of the weft line of the embossing pattern is uneven, and the pattern on both sides of the weft line of the printed pattern is formed Uneven, high defect rate of printed pattern

Problems such as glitches or smoothness on one side and blurring on the other may reduce the high lifespan rate of the OLED and the high brightness rate of the screen

In addition, the uneven burrs on both sides of the printed pattern will also affect the subsequent bonding with the evaporation substrate and the quality of laser sintering

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