OLED Pixel Structure Isolating Layer Surface Damage Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current manufacturing methods for organic electroluminescence apparatuses face challenges with material adhesion and surface damage due to dry etching agents, affecting the reliability of the pixel structure.
Innovation Solution
A pixel structure is designed with a first isolating layer made of oxide semiconductor material, patterned using a wet etch method to reduce surface damage and improve reliability, and a second isolating layer to enhance material adhesion and light emission characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dry etching method is used to form openings in isolating layer, then manufacturing precision is improved, but surface damage to electrode occurs
Solution Approach 1:
The patent introduces an organic insulating layer as an intermediary between the electrode and the etching process. This layer serves as a protective mask during dry etching, preventing direct contact between etching agents and the electrode surface, thereby eliminating surface damage while maintaining manufacturing precision
Solution Approach 2:
The organic insulating layer is formed on the electrode surface before the dry etching process to provide beforehand protection. This cushioning layer absorbs the harmful effects of etching agents, preventing them from reaching and damaging the electrode, thus resolving the contradiction between precision and surface damage
2Strength
If material for isolating layer is chosen for adhesion, then material adhesion is improved, but hydrophobicity or hydrophilicity issues arise
Solution Approach 1:
The patent employs a composite structure combining organic insulating layer and inorganic insulating layer. The organic layer provides adhesion and surface property control, while the inorganic layer provides structural stability and etching resistance, together resolving the contradiction between adhesion strength and hydrophobicity compatibility
Solution Approach 2:
Different regions of the isolating structure have different material compositions tailored to local requirements. The organic insulating layer contacts the electrode where adhesion is critical, while the inorganic layer provides overall structural support and etching protection, allowing each layer to optimize its local function
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces surface damage from etching agents, improves material adhesion, and enhances the reliability and light emission efficiency of the organic electroluminescence apparatus.
Implementation Method 1
an organic light-emitting layer disposed between the cathodes and anodes
Data Source
AI summary
A pixel structure of an organic electroluminescence apparatus includes at least an active device connected to a scan line and a data line, a first electrode, a dielectric material layer, a first isolating layer, a second isolating layer, an organic light-emitting material layer and a second electrode. The dielectric material layer is disposed on the first electrode and has a first opening to expose the first electrode. The first isolating layer disposed on the dielectric material layer includes an oxide semiconductor material and has a second opening to expose the first electrode. The second isolating layer is disposed on the first isolating layer and has a third opening to expose the first electrode in the first opening and the first isolating layer in a sidewall of the second opening. The organic light-emitting material layer is in the third opening. The second electrode is on the organic light-emitting layer.