Organic Light-Emitting Display Barrier Layer Manufacturing
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Solution Overview
Problem
Current methods for manufacturing organic light-emitting display apparatuses face challenges in achieving high resolution and reducing failure rates, particularly in the deposition and removal processes of organic functional layers and electrodes.
Innovation Solution
A method involving the formation of lift-off layers and barrier layers with varying fluorine content, followed by precise etching and deposition processes using fluorine-based solvents, allows for the creation of undercut profiles and efficient removal of layers, enabling the formation of high-resolution organic light-emitting display apparatuses with reduced failure rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional manufacturing methods are used for organic light-emitting display apparatuses, then the manufacturing process is simpler, but the resolution and failure rate are insufficient
Solution Approach 1:
The patent divides the manufacturing process into multiple unit processes (first unit process, second unit process, etc.), where each process forms specific layers (lift-off layer, barrier layer, organic functional layer) with distinct functions. This segmentation allows precise control over resolution and failure rates by optimizing each stage independently, while managing overall process complexity through systematic organization.
Solution Approach 2:
The patent applies different fluorine content concentrations in different layers: the lift-off layer contains fluorine at 20-60 wt%, while the barrier layer contains fluorine at 40-76 wt%. This local quality variation enables selective etching and precise pattern formation, improving manufacturing precision without requiring uniformly complex processes throughout.
2Reliability
If fluorine-based solvents and multi-layer structures are used, then impurity diffusion is prevented and resolution improves, but the manufacturing process becomes more complex
Solution Approach 1:
The patent introduces a barrier layer with high fluorine content (40-76 wt%) as an intermediary between the lift-off layer and the organic functional layer. This barrier layer acts as a mediator that prevents impurity diffusion from the photoresist into the organic functional layer during etching, thereby improving reliability and reducing failure rates while maintaining manageable process complexity through its protective function.
Solution Approach 2:
The patent employs composite material structures with varying fluorine content: the lift-off layer (20-60 wt% fluorine) and barrier layer (40-76 wt% fluorine) form a composite system that leverages the properties of fluorinated polymers for both pattern formation and impurity blocking. This composite approach improves reliability by addressing multiple functions (etching, protection, purification) through material composition rather than adding separate process steps.
3Manufacturing precision
If precise etching and deposition processes are implemented, then manufacturing precision and resolution improve, but the manufacturing time and complexity increase
Solution Approach 1:
The patent performs preliminary actions by forming the lift-off layer and barrier layer with specific fluorine content gradients before the main organic functional layer deposition. The undercut profiles are created in advance during the etching stage, which facilitates subsequent lift-off processes and reduces the need for complex post-processing steps, thereby improving resolution while minimizing additional manufacturing time.
Solution Approach 2:
The patent utilizes parameter changes in fluorine content concentration (20-60 wt% in lift-off layer, 40-76 wt% in barrier layer) to control etching rates and pattern formation. By adjusting this critical parameter, the process achieves high-resolution patterns and precise layer removal without requiring multiple sequential processing steps, thus improving manufacturing precision while reducing overall manufacturing time.
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
This method enhances the resolution and reliability of organic light-emitting display apparatuses by preventing impurity diffusion and facilitating sophisticated deposition patterns, leading to improved manufacturing efficiency and reduced failure rates.
Implementation Method 1
The first electrode may be exposed by etching the first lift-off layer and the first barrier layer disposed on the first portion of the first photoresist with a first solvent including fluorine
Implementation Method 2
forming a first barrier layer on the first lift-off layer, the first barrier layer having a higher fluorine content than the first lift-off layer; A first undercut profile may be formed in the first barrier layer under the first photoresist, and a second undercut profile may be formed in the first lift-off layer under the first barrier layer
Implementation Method 3
forming a first organic functional layer including a first emission layer on the first electrode and the second portion of the first photoresist; The first organic functional layer may be formed by a deposition process
Data Source
AI summary
A method of manufacturing an organic light-emitting display apparatus including: forming a lift-off layer including a fluoropolymer, a barrier layer having a higher fluorine content than the lift-off layer, and a photoresist on a substrate including a first electrode; removing a portion corresponding to the first electrode by patterning the photoresist, and leaving the remaining portion; exposing the first electrode by etching the lift-off layer and the barrier layer on the first electrode; forming an organic functional layer on the first electrode and on the remaining photoresist; removing the barrier layer, the photoresist, and the organic functional layer on the remaining lift-off layer; and forming a second electrode on the organic functional layer on the first electrode.