Lengthy Object Plasma Treatment Through High-Density Zones
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Solution Overview
Problem
Existing plasma treatment methods face challenges in uniformly treating lengthy, electrically conductive objects due to varying plasma density distribution and abnormal discharge issues, making it difficult to achieve even surface modification.
Innovation Solution
A plasma treatment method and apparatus that selectively passes lengthy objects through areas with high plasma density, using ring-shaped electrodes and a guide portion to ensure uniform exposure and prevent abnormal discharge, allowing for efficient and uniform surface treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If plasma treatment is applied to lengthy objects using conventional methods, then surface modification is achieved, but treatment uniformity deteriorates due to varying plasma density distribution
Solution Approach 1:
The patent applies local quality by creating regions of different plasma density within the treatment chamber. A high-density plasma region is specifically formed near the chamber wall where the lengthy object passes, while other regions have lower density. This localized high-density zone ensures uniform and effective surface modification of the object without requiring uniform plasma distribution throughout the entire chamber.
2Adaptability or versatility
If conventional plasma treatment apparatus is used for electrically conductive lines, then treatment is attempted, but abnormal discharge occurs between electrodes and the line
Solution Approach 1:
The patent localizes the plasma generation to a specific region near the chamber wall, separated from the electrode structure. The lengthy object passes through this localized high-density plasma region, preventing direct contact between the electrically conductive object and the electrodes, thereby avoiding abnormal discharge while still achieving effective surface treatment.
Solution Approach 2:
The patent introduces a dielectric material or gas medium as an intermediary between the electrodes and the electrically conductive lengthy object. This intermediary prevents direct electrical contact and abnormal discharge, while still allowing plasma to be generated and transferred to treat the object surface effectively.
3Manufacturing precision
If uniform plasma density is maintained throughout the treatment chamber, then comprehensive treatment is achieved, but treatment time increases
Solution Approach 1:
The patent concentrates plasma density in a localized high-density region near the chamber wall where the lengthy object passes, rather than maintaining uniform plasma density throughout the entire chamber. This localized approach reduces the volume requiring plasma generation, thereby decreasing treatment time while ensuring high-quality surface modification in the treatment zone.
4Manufacturing precision
If plasma treatment apparatus is designed for comprehensive coverage, then all areas are treated, but apparatus size increases
Solution Approach 1:
The patent designs the plasma treatment apparatus to concentrate plasma generation in a localized high-density region near the chamber wall, rather than distributing plasma generation throughout the entire chamber. This localized plasma zone reduces the required apparatus size while still achieving effective surface treatment of the lengthy object as it passes through the treatment region.
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
Enables high-speed plasma treatment with uniform surface modification of lengthy objects, including electrically conductive materials, while reducing treatment time and apparatus size, and improving surface treatment effectiveness.
Implementation Method 1
Glow discharge plasma is generated in the tube under atmospheric pressure by voltage being applied to the electrodes such as to induce electric potential difference in the length direction
Implementation Method 2
a plasma treatment method in which a lengthy object to be treated is subjected to plasma treatment by being placed in contact with plasma
Data Source
AI summary
A plasma treatment method subjects a long object to be treated to plasma treatment by placing the long object to be treated in contact with plasma, the density distribution of which varies while selectively passing the long object to be treated through an area having high plasma density so that a surface of the long object can be thoroughly and uniformly subjected to plasma treatment. The method is applied to a plasma treatment apparatus, and a plasma-treated long object can be obtained by the method.