Etching Chamber Gas Distribution for Uniform Plasma Processing
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Solution Overview
Problem
Existing display device manufacturing processes face challenges in achieving uniform gas diffusion within etching chambers, leading to inconsistencies in the etching process and potential corrosion issues during the production of display devices.
Innovation Solution
An etching device with a chamber, stage, gas distribution unit, and plasma generation modules that allows for selective operation modes, including the option to maintain gas in a gaseous state or excite it to a plasma state, ensuring uniform gas distribution and effective removal of corrosion from target substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gas is introduced into the chamber for etching processes, then the etching process can be performed, but the gas may not be uniformly diffused leading to process non-uniformity
Solution Approach 1:
The gas distribution unit is divided into multiple gas inlet pipes (first, second, third, and fourth gas inlet pipes) positioned at different locations around the chamber. Each pipe delivers gas to specific regions, ensuring comprehensive and uniform gas distribution throughout the chamber volume, thereby resolving the non-uniformity issue in etching processes
Solution Approach 2:
Multiple gas inlet pipes are combined into a single integrated gas distribution unit that coordinates gas flow from all pipes simultaneously. This unified system ensures synchronized gas delivery to different chamber regions, achieving uniform gas concentration and distribution necessary for consistent etching uniformity
2Productivity
If plasma generation modules are used to excite gas to plasma state, then etching effectiveness is improved, but device complexity increases
Solution Approach 1:
The plasma generation module is designed to serve multiple functions: it can excite different types of gas to plasma state, maintain plasma at various power levels, and work in coordination with the multi-pipe gas distribution system. This universal design achieves high etching efficiency while avoiding the need for separate specialized plasma generation systems for different etching conditions
Solution Approach 2:
The gas distribution unit acts as an intermediary between the gas supply system and the plasma generation module. It pre-distributes gas uniformly throughout the chamber before plasma generation, ensuring that the plasma generation module receives evenly distributed gas and can maintain uniform plasma distribution, thereby improving etching efficiency without requiring complex plasma control mechanisms
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 etching device ensures uniform gas distribution and efficient removal of corrosion from substrates, enhancing process uniformity and improving the manufacturing of display devices by optimizing gas utilization and plasma generation.
Implementation Method 1
the plurality of plasma generation modules may be turned on, and the gas in the gaseous state supplied from the gas supply unit may be excited to a plasma state by the plurality of plasma generation modules
Implementation Method 2
it is important that the gas is uniformly diffused in the chamber, in which the above-described processes are performed
Data Source
AI summary
An etching device includes a chamber; a stage disposed in the chamber and on which a target substrate is loaded; a gas distribution unit disposed to face the stage in the chamber; a plurality of plasma generation modules disposed above the chamber; a gas supply unit that supplies gas into the chamber; a gas line connecting the gas supply unit and the plurality of plasma generation modules; and a plurality of gas inlet pipes each including an end connected to the plasma generation module and another end connected to the gas distribution unit.