Masked Plasma Etching for Organic Layer Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the manufacturing of organic light-emitting display devices, there is a challenge in preventing the backflow of plasma into pixel areas during the etching process, which leads to uneven etching and unwanted removal of organic layers in non-layer forming areas.
Innovation Solution
An organic layer etching apparatus is designed with a mask and a dividing member to guide plasma away from the pixel area, using a plasma generator to etch the organic layer in non-pixel areas while ensuring uniform plasma flow and preventing backflow into the pixel areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If plasma is supplied into the etching chamber to remove organic layer, then etching capability is improved, but plasma backflow into pixel area causes unwanted etching and non-uniformity
Solution Approach 1:
The etching chamber is segmented into a pixel area and a non-pixel area using a mask structure. The mask divides the chamber space so that plasma can be supplied to the non-pixel area for organic layer removal while being physically blocked from entering the pixel area, thus preventing unwanted etching and maintaining etching uniformity.
Solution Approach 2:
Different regions of the etching chamber are given different properties: the pixel area is protected by the mask to prevent plasma exposure, while the non-pixel area is exposed to plasma for etching. This local differentiation ensures that etching occurs only where needed without affecting other regions.
2Ease of operation
If mask is used to guide plasma toward non-pixel area, then plasma flow control is improved, but device complexity increases
Solution Approach 1:
A mask is introduced as an intermediary component between the plasma source and the substrate. The mask serves as a physical mediator that directs plasma flow toward the non-pixel area while blocking the pixel area, providing simple and effective plasma flow control without requiring complex control systems.
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 solution effectively removes organic layers from non-layer forming areas without affecting the pixel areas, improving etching uniformity and preventing unnecessary etching, thus enhancing the manufacturing process of organic light-emitting display devices.
Implementation Method 1
a plasma generator that is disposed at a side of the etching chamber and generates plasma and supplies the plasma into the etching chamber
Data Source
AI summary
Provided are an apparatus and method for etching an organic layer, in which an organic material deposited in a non-layer forming area of a substrate is etched. The apparatus includes an etching chamber; a plasma generator configured to supply plasma into the etching chamber; a stage disposed in the etching chamber and configured to support the substrate; and a mask configured to guide the plasma toward the non-pixel area.