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A kind of mask board and its net stretching method, net stretching device

A mask and deformation technology, applied in the field of mask, can solve the problems of inaccurate evaporation of materials, FMM expansion deformation, screen color mixing, etc.

Active Publication Date: 2021-11-02
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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  • A kind of mask board and its net stretching method, net stretching device
  • A kind of mask board and its net stretching method, net stretching device
  • A kind of mask board and its net stretching method, net stretching device

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Embodiment Construction

[0031] A method for stretching a mask plate provided in an embodiment of the present application, such as figure 1 As shown, the method includes:

[0032] S101. According to the deformation conditions in the evaporation chamber in the evaporation process, the mask plate to be produced is deformed;

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

[0034] The embodiment of the present application provides a method for stretching a mask plate. Due to the deformation conditions in the evaporation chamber in the evaporation process, the mask plate to be produced is deformed, and the deformed mask plate Perform netting, alignment and welding, and consider factors in the evaporation chamber during the process of netting, alignment, and welding of the mask plate, so that the mask plate during the netting alignment welding process and the subsequent evaporation process can be reduced. The difference in deformation amount, thereby reducing the difference between th...

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Abstract

The present application discloses a mask plate, its net stretching method, and a net stretching device, which are used to improve the pixel position accuracy of the mask plate and reduce color mixing defects of display products. The embodiment of the present application provides a mask stretching method, the method includes: according to the deformation conditions in the evaporation chamber in the evaporation process, the mask to be produced is deformed; The membrane plate is stretched, aligned and welded.

Description

technical field [0001] The present application relates to the field of mask plates, in particular to a mask plate, its stretching method, and its stretching device. Background technique [0002] Organic light-emitting diode (Organic Light-Emitting Diode, OLED) display has been more and more widely used due to its advantages of high contrast, self-illumination and flexible display. At present, vacuum thermal evaporation is an effective method for preparing OLED devices. It deposits the material molecules heated and evaporated through the opening of the high-precision metal mask (FineMetal Mask, FMM) to the corresponding position of the backplane. . In this film formation method, the mask frame assembly (MFA) is a necessary item to ensure that the organic light-emitting material is accurately evaporated to the designed position. It is mainly composed of a frame (Frame), a shielding metal strip (Cover), a supporting metal It is composed of several parts such as Howling, Align...

Claims

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Application Information

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Patent Type & Authority Patents(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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