OLED Thermal Treatment Module for Uniform Drying
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Solution Overview
Problem
In the manufacturing of OLED displays, achieving uniform drying rates across substrates is challenging due to differences in vapor accumulation, leading to non-uniform film thickness and performance variability in pixels.
Innovation Solution
The development of thermal treatment modules with adjustable parameters such as temperature-controlled condensation plates and vacuum chambers, allowing for precise control of drying and baking processes to ensure uniform solvent removal and film formation across substrates, including the use of condensation plates with varying gap sizes and showerheads for efficient vapor removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If thermal treatment is applied to drive off carrier liquid and form films, then film formation is achieved, but non-uniform drying rates occur due to vapor accumulation differences
Solution Approach 1:
The thermal treatment module segments the treatment chamber into multiple zones with independent temperature control. Different regions can be heated to different temperatures to compensate for vapor accumulation variations, ensuring uniform drying rates across the entire substrate surface despite spatial differences in vapor concentration.
Solution Approach 2:
The system dynamically adjusts temperature parameters across different spatial locations and time points during the thermal treatment process. By changing temperature parameters in response to detected vapor accumulation patterns, the system maintains uniform drying rates and prevents non-uniform film thickness formation.
2Adaptability or versatility
If process development flexibility is provided to test various parameters, then process optimization capability is improved, but device complexity increases
Solution Approach 1:
The thermal treatment module is designed as a universal platform that can perform multiple process functions including drying, baking, and annealing. The same hardware configuration supports testing of various parameters and conditions, eliminating the need for multiple specialized devices and reducing overall system complexity while maintaining high adaptability for process development.
Solution Approach 2:
The module incorporates dynamically adjustable parameters such as variable temperature profiles, adjustable treatment durations, and flexible atmosphere control. These dynamic capabilities allow the system to adapt to different process development requirements without requiring complex reconfiguration, enabling researchers to test various parameters using the same hardware platform.
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
These modules enable uniform drying and baking processes, reducing edge effects and ensuring consistent film thickness and quality across OLED substrates, thereby improving the performance and reliability of OLED displays.
Implementation Method 1
the liquid component of the liquid ink can evaporate from the surface of the substrate and condense onto a condensation plate
Implementation Method 2
The drying module can be configured with a showerhead having a plurality of vacuum ports in flow communication with a vacuum source
Implementation Method 3
The condensation plate can be heated to a temperature sufficient to remove the condensed liquid
Data Source
AI summary
Various materials can be deposited on an OLED substrate at various steps, in which the materials may subsequently require drying, baking and a combination thereof. Given the critical nature of drying and baking steps, the inventors of the present teachings have designed various modules for carrying out drying and baking which can be used as a process development module, and additionally for as a dedicated process module in production.