Mask plate and net extension method and device thereof

A mask and mask technology, applied in the field of masks, can solve the problems of FMM expansion deformation, material inaccurate evaporation, screen color mixing, etc., so as to reduce the difference in deformation, improve accuracy, and reduce screen color mixing. Effect

Active Publication Date: 2018-12-28
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of netting method is widely used and relatively mature, but because there will be a back glass above the FMM during actual evaporation, the back glass will sag under its gravity, making the FMM sag accordingly, and at the same time, the temperature of the evaporation chamber is relatively low. High, FMM will also expand and deform under thermal stress
The welded FMM PPA will change under the action of these two deformations, resulting in the inability of the material to be accurately evaporated to the design position, resulting in color mixing on the screen

Method used

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  • Mask plate and net extension method and device thereof
  • Mask plate and net extension method and device thereof
  • Mask plate and net extension method and device thereof

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Embodiment Construction

[0031] An embodiment of the application provides a method for spreading a mask, such as figure 1 As shown, the method includes:

[0032] S101: According to the deformation conditions in the vapor deposition chamber in the vapor deposition process, deform the mask to be manufactured;

[0033] S102: Stretching, aligning and welding the deformed mask.

[0034] According to the method for spreading the mask plate provided by the embodiment of the present application, the mask plate to be produced is deformed according to the deformation conditions in the evaporation chamber in the evaporation process, and the mask plate is deformed. Netting, alignment, and welding, mask netting, positioning and welding, consider the factors in the evaporation chamber, so as to reduce the masking board during the welding process and subsequent evaporation process. The difference in the deformation of the film, thereby reducing the difference between the PPA of the mask plate obtained by the screen, the a...

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Abstract

The invention discloses a mask plate and a net extension method and device thereof. The mask plate and the net extension method and device thereof are used for improving the pixel position precision of the mask plate, and reducing bad color mixing of display products. The net extension method of the mask plate comprises the steps that deformation occurs on the mask plate to be manufactured according to the deformation condition of an evaporation chamber in evaporation technology; and net extension, alignment and welding are carried out on the mask plate in which the deformation occurs.

Description

Technical field [0001] This application relates to the field of masks, and in particular to a mask, a method for spreading a net, and a net spreading device. Background technique [0002] Organic Light-Emitting Diode (OLED) displays have become more and more widely used due to their advantages such as high contrast, self-luminescence, and flexible display. At present, vacuum thermal evaporation is an effective method for preparing OLED devices. It deposits the heated and evaporated material molecules through the openings of the high-precision metal mask (FineMetal Mask, FMM) to the corresponding position on the backplane. . In this method of film formation, the mask frame assembly (MFA) is a necessary item to ensure that the organic light-emitting material is accurately evaporated to the design position. It is mainly composed of a frame (Frame), a shielding metal strip (Cover), and a supporting metal. It is composed of several parts, such as Howling, Align Mask, and FMM. Among...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/04C23C14/24
CPCC23C14/042C23C14/24
Inventor 丁渭渭吴建鹏
Owner BOE TECH GRP CO LTD
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