OLED Partition with Moisture Removal Holes
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Solution Overview
Problem
The organic light emitting device's organic layer is prone to moisture absorption during the thin film structure formation process, which can lead to reduced emissive capability and effective emission region due to exposure to air, etchants, or cleaners.
Innovation Solution
An organic light emitting device is designed with an organic layer exposing hole and a moisture removal process, where a partition with an organic layer exposing hole is formed to expose a portion of the organic layer, allowing for effective moisture removal, and an annealing process in a vacuum state is conducted to eliminate moisture, ensuring the organic emission layer's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an organic layer is formed during the thin film structure formation process, then the device structure is completed, but moisture is absorbed by the organic layer through exposure to air, etchants, or cleaners, deteriorating the emissive capability
Solution Approach 1:
The device is segmented into multiple functional layers including the organic layer, emission layer, and partition layer. The partition layer is further segmented to include moisture removal holes that expose specific portions of the organic layer, allowing selective moisture removal while maintaining the integrity of the overall device structure.
Solution Approach 2:
Moisture is extracted from the organic layer through the partition layer via the moisture removal holes. This extraction process removes the harmful moisture that was absorbed during manufacturing, thereby restoring and maintaining the emissive capability of the organic layer without compromising the device structure.
2Productivity
If the organic layer is exposed to air during manufacturing, then the thin film formation process can be completed, but moisture absorption occurs, reducing the effective emission region
Solution Approach 1:
The partition layer with moisture removal holes is designed and positioned in advance during the manufacturing process. This preliminary structure enables subsequent moisture removal treatment to be performed on the organic layer, preventing moisture-related degradation of the emission region and maintaining manufacturing productivity.
3Ease of manufacture
If moisture is absorbed by the organic layer, then the manufacturing process proceeds, but the emissive capability deteriorates and effective emission region is reduced
Solution Approach 1:
The partition layer is designed with localized moisture removal holes at specific positions where moisture accumulation is most problematic. This local quality approach allows precise moisture removal from critical areas of the organic layer, maintaining manufacturing precision and emission region quality without affecting the overall manufacturing process.
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 effectively removes moisture from the organic layer, enhancing the emissive capability and maintaining the effective emission region by preventing moisture absorption and ensuring the organic emission layer's performance.
Implementation Method 1
Each pixel includes an organic light emitting element for emitting light of one color among red, green, and blue
Implementation Method 2
an annealing process in a vacuum state is conducted to eliminate moisture
Data Source
AI summary
The present invention relates to an organic light emitting device and a manufacturing method thereof. The organic light emitting device according to an exemplary embodiment of the present invention includes a first thin film transistor disposed on a substrate, an organic layer disposed on the first thin film transistor, a pixel electrode disposed on the organic layer and connected to the first thin film transistor, a partition disposed on the pixel electrode and the organic layer, and an organic emission layer disposed on the pixel electrode and contacting the partition. The partition has an organic layer exposing hole that exposes a portion of the organic layer and an opening that exposes a portion of the pixel electrode.