Flexible OLED Panel Edge Protection Against Etchant Corrosion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing OLED display panels face issues with corrosion of the metal film layer due to etchant penetration and exposure, leading to moisture, oxygen, and impurity ingress, which affects the packaging effect.
Innovation Solution
A flexible display panel design that incorporates an organic protective layer extending over the edge of the metal film layer, formed in a groove of the planarization layer, to prevent etching and impurity ingress, using the same organic material as the planarization layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the planarization layer is excavated to form a groove exposing the metal film layer edge, then the metal film layer can be accessed for electrical connection, but the metal film layer becomes vulnerable to etchant penetration and corrosion
Solution Approach 1:
The patent applies preliminary action by forming the organic protective layer before the etching process. The organic protective layer is deposited to cover the metal film layer edge in advance, creating a protective barrier that prevents etchant from reaching and corroding the metal film layer during subsequent processing steps.
Solution Approach 2:
The organic protective layer serves as an intermediary between the etchant and the metal film layer. It acts as a mediator that allows the etching process to proceed while protecting the metal film layer from direct contact with the etchant, thus preventing corrosion while maintaining processability.
2Ease of manufacture
If the metal film layer edge is exposed in the groove, then subsequent processing can be performed, but moisture and oxygen can penetrate along the edge affecting packaging effect
Solution Approach 1:
The patent uses a thin film approach by forming an organic protective layer that conforms to the groove structure and covers the metal film layer edge. This thin film barrier effectively seals the exposed edge, preventing moisture and oxygen penetration while maintaining the accessibility needed for subsequent processing operations.
3Device complexity
If no protective layer is formed over the metal film layer edge, then the structure remains simple, but the metal film layer suffers from etchant corrosion and impurity ingress
Solution Approach 1:
The organic protective layer acts as a temporary protective element that is formed, serves its protective function during critical processing steps, and can be removed or integrated into the final structure. This disposable protective layer provides essential protection during manufacturing without requiring complex permanent structural modifications.
Data Source
AI summary
The present application discloses a flexible display panel and a method for manufacturing the same. By covering the edge of the metal film layer by using an organic protective layer at the groove of the planarization layer on the patterned metal film layer, which avoids subsequent etching of the anode etching solution of the organic light-emitting layer to the metal film layer, and prevents the metal at an edge of the metal film layer from being corroded, and can block moisture, oxygen and impurities in the air from entering a device area of the organic light-emitting layer along the edge of the metal film layer, thereby improving a packaging effect.