OLED evaporation crucible

Abstract

The invention provides an OLED evaporation crucible. The OLED evaporation crucible comprises a crucible body, a crucible upper cover, a first heat conduction layer and a second heat conduction layer,wherein the crucible body is provided with an accommodating cavity; an opening is formed in the top of the crucible body; the accommodating cavity communicates with the opening; the crucible upper cover covers the opening, and is arranged at the top of the crucible body; a nozzle for communicating the accommodating cavity with the outer part of the crucible body is arranged at the middle positionof the crucible upper cover; the first heat conduction layer covers the outer side wall of the crucible body, and is arranged on the crucible body; the second heat conduction layer covers the side wall away from the accommodating cavity, of the crucible upper cover, and is arranged on the crucible upper cover; the bottom of the second heat conduction layer is in contact with the top of the first heat conduction layer; and a through hole which communicates with the nozzle is formed in the second heat conduction layer. According to the OLED evaporation crucible disclosed by the invention, through the above structure, the situation that when vaporized evaporation materials pass through the nozzle, the vaporized evaporation materials are condensed because of temperature reduction, and are adhered to the periphery of the nozzle, and after definite time, nozzle blocking can be caused, can be avoided, and the quality of organic films is improved.

Description

Technical field [0001] The present invention relates to the field of OLED technology, in particular to an OLED evaporation crucible. Background technique [0002] In the current OLED vacuum evaporation process, the evaporation material is vaporized at a high temperature and then deposited on the backplane glass to finally form an organic film, which is used to realize the light emission of the OLED device. The quality and life of the OLED device are very sensitive to the uniformity of the film. Therefore, evaporation equipment and technology also face many extremely high-precision requirements. When the bottom of the existing crucible body is heated, the evaporation material will vaporize. However, when the vaporized gas flows out from the opening at the top of the crucible body, the top of the crucible body is not heated, that is, the gas is cold at this time. The uniformity of the organic film and the quality of the formed OLED device. Summary of the invention [0003] The tec...

AI Technical Summary

Problems solved by technology

However, after the bottom of the existing crucible body is heated, the evaporation material will be vaporized, but when the vaporized gas flows out from the opening at the top of the crucible body, the top of the crucible body is not heated, that is, the gas is cooled at this time, affecting Uniformity of organic thin film, and the quality of the formed OLED device

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