Display panel and manufacturing method therefor, and display apparatus

By setting a second sub-section with a gradually varying thickness in the OLED display panel and adjusting the displacement gas parameters, the undercut structure problem caused by oxygen displacement in the metal layer was solved, improving the yield rate of the display panel and the stability of signal transmission.

WO2026113039A1PCT designated stage Publication Date: 2026-06-04TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
Filing Date
2024-12-04
Publication Date
2026-06-04

AI Technical Summary

Technical Problem

In OLED display panels, the metal layer is prone to forming an undercut structure during oxygen replacement, making it difficult to fill the organic planarization layer, which in turn leads to film peeling and affects the yield of the display panel.

Method used

A second sub-section with a gradually varying thickness is provided between the conductive layer and the first organic layer to reduce the pressure and/or flow rate of the replacement gas, adjust the composition of the replacement gas, avoid the formation of an undercut structure between the signal transmission section and the first organic layer, and improve the coverage by covering the signal transmission section and the first organic layer with the second organic layer.

Benefits of technology

This reduces the probability of film peeling, improves the yield rate of display panels, avoids the generation of undercut structures, and ensures the stability of signal transmission.

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Abstract

The present application relates to a display panel and a manufacturing method therefor, and a display apparatus. A first organic layer comprises a first sub-portion aligned with a signal transmission portion in a first direction and a second sub-portion connected to the first sub-portion, wherein the thickness of the second sub-portion is less than the thickness of the first sub-portion, the second sub-portion and the signal transmission portion do not overlap in the first direction, and the first direction is a direction from the first organic layer toward a conductive layer.
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