Electrostatic Chuck Bipolar Electrodes OLED Transfer
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Solution Overview
Problem
Current electrostatic chuck systems face challenges in efficiently manufacturing organic light-emitting display apparatuses, particularly in aligning and transferring layers with precision and minimizing gaps between the display substrate and optical mask, which affects the quality and efficiency of the manufacturing process.
Innovation Solution
An electrostatic chuck system with a stage having first and second electrodes of different polarities, a display substrate with a pixel electrode, and an optical mask with a reflection layer and transfer layer, where the substrate and mask are charged using monopolar and bipolar methods respectively, allowing for precise alignment and transfer of the transfer layer to the substrate via light irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional electrostatic chuck systems are used for manufacturing organic light-emitting display apparatus, then the manufacturing process can be performed, but the alignment precision and transfer quality between the optical mask and display substrate deteriorate due to gaps and misalignment
Solution Approach 1:
The system dynamically adjusts electrostatic field distribution by applying different polarities to different regions. The first electrode applies a first polarity electrostatic field while the second electrode applies a second polarity electrostatic field, creating a dynamic and adjustable field configuration that adapts to the specific alignment and transfer requirements, thereby improving both precision and reliability.
Solution Approach 2:
The patent applies local quality by creating distinct electrostatic field zones with different polarities in different regions. The first electrode region and second electrode region generate electrostatic fields with opposite polarities, allowing localized control over the display substrate and optical mask interaction, enabling precise alignment and gap control in specific areas.
2Manufacturing precision
If a simple single-electrode electrostatic chuck system is used, then the device complexity is low, but the ability to control substrate flatness and alignment precision deteriorates
Solution Approach 1:
The electrostatic chuck system is segmented into multiple independent electrodes (first electrode and second electrode), each capable of generating electrostatic fields with different polarities. This segmentation allows independent control of different regions, enabling precise control over substrate flatness and alignment without requiring overly complex integrated systems.
Solution Approach 2:
The multi-electrode system serves multiple functions simultaneously: it controls substrate flatness, enables precise alignment, and facilitates the transfer process. By integrating these functions into a single coordinated system with multiple electrodes, the patent achieves high manufacturing precision without proportionally increasing device complexity.
3Productivity
If monopolar charging method is used for both substrate and mask, then the charging process is simple, but the alignment precision and transfer efficiency deteriorate due to lack of differential control
Solution Approach 1:
The system introduces asymmetry by applying different polarities to different electrodes. The first electrode applies a first polarity while the second electrode applies a second polarity, creating an asymmetric electrostatic field configuration that enables differential control. This asymmetry allows the system to simultaneously optimize for both alignment precision and transfer efficiency by controlling the interaction between the display substrate and optical mask in a non-uniform manner.
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 precision and efficiency of transferring the transfer layer to the display substrate, improving the quality of the organic light-emitting display apparatus and simplifying the manufacturing process by minimizing the gap between the substrate and optical mask, thereby maintaining a flat and stable substrate during the transfer process.
Implementation Method 1
a first electrode configured to generate a first polarity electrostatic field and a second electrode configured to generate a second polarity electrostatic field
Implementation Method 2
The display substrate has one of the first and second polarities, and the optical mask has the other of the first and second polarities
Implementation Method 3
forming an intermediate layer on an emission area of the display substrate by irradiating light to the optical mask to transfer the transfer layer from the optical mask to the display substrate
Data Source
AI summary
Provided are an electrostatic chuck system and a method of manufacturing an organic light-emitting display apparatus by using the electrostatic chuck system. The electrostatic chuck system comprises: a stage in which a first electrode and a second electrode are arranged, the first electrode having a first polarity and the second electrode having a second polarity that is different from the first polarity; a display substrate on the stage, the display substrate including a pixel electrode on a surface thereof; and an optical mask over the surface of the display substrate, the optical mask including a reflection layer and a transfer layer to be transferred to the display substrate, wherein the display substrate has one of the first and second polarities, and the optical mask has the other of the first and second polarities as the display substrate.