Hollow Cathode Discharge Apparatus for Uniform Plasma Generation
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Solution Overview
Problem
Current plasma apparatuses face uniformity issues during large-size plasma processes for optoelectronic devices like solar cells and TFT-LCDs, leading to non-uniform plasma density and coating quality problems.
Innovation Solution
A hollow cathode discharge apparatus with multiple flow channels and chambers, designed to stabilize working gas pressure and distribute power uniformly, generating plasma with high uniformity and high ionization for enhanced deposition rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional plasma apparatuses are used for large-size plasma processes, then the processing area can be enlarged, but the plasma uniformity deteriorates
Solution Approach 1:
The cathode is divided into multiple independent cathode chambers (first cathode chamber, second cathode chamber, etc.), each capable of generating plasma independently. This segmentation allows each chamber to maintain uniform plasma density while collectively covering a large processing area, thus resolving the contradiction between enlarged area and maintained uniformity.
Solution Approach 2:
Each cathode chamber is equipped with its own flow channels and gas supply system, allowing independent control of working gas flow and pressure in each local region. This enables optimization of plasma uniformity in each chamber while maintaining overall large-area coverage, addressing the uniformity issue in large-size processes.
2Manufacturing precision
If the cathode is divided into multiple chambers with flow channels, then the plasma uniformity improves, but the device complexity increases
Solution Approach 1:
Multiple cathode chambers are arranged in parallel within a single cathode structure, sharing common support infrastructure while maintaining independent gas flow paths. This merging approach achieves improved plasma uniformity through multiple chambers without proportionally increasing overall device complexity, as the chambers are integrated into a unified cathode assembly.
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 apparatus achieves improved plasma uniformity and deposition rates, enhancing product performance, quality, and reducing production costs for large-area coatings in optoelectronic devices.
Implementation Method 1
a cathode discharge apparatus comprises an anode, a cathode and plural cathode chambers. The cathode is located inside the anode, wherein the cathode has plural flow channels and at least one flow channel hole
Implementation Method 2
The working gas inside the cathode chambers generates plasma spouted through the chamber outlets
Implementation Method 3
the cathode has plural flow channels and at least one flow channel hole, and the plural flow channels are connected to one another through the flow channel hole
Implementation Method 4
The main manufacturing method of the thin film solar cell includes plasma enhanced chemical vapor deposition (PECVD)
Implementation Method 5
The main manufacturing method of the thin film solar cell includes plasma enhanced chemical vapor deposition (PECVD)
Data Source
AI summary
A cathode discharge device is provided. The cathode discharge apparatus includes an anode, a cathode and plural cathode chambers. The cathode is located inside the anode, where the cathode has plural flow channels and at least one flow channel hole, and the plural flow channels are connected to one another through the flow channel hole. The plural cathode chambers are located inside the cathode, wherein each of the cathode chambers has a chamber outlet and a chamber inlet connected with at least one of the flow channels.