PVA Substrate Cleaning Tool with Fluororesin Particles
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Solution Overview
Problem
Conventional substrate cleaning tools lack sufficient cleaning power, particularly when cleaning the back surface and periphery of substrates after polishing, which requires high cleaning efficiency to remove dirt and particles effectively.
Innovation Solution
A substrate cleaning tool made of PVA sponge with embedded fluororesin particles or catalyst metal particles, where the distribution density of these particles varies across different regions, providing enhanced cleaning power and flexibility, and can include abrasive grains for mechanical removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional substrate cleaning tools are used, then the structure is simple, but the cleaning power is insufficient
Solution Approach 1:
The cleaning tool uses a composite structure combining PVA sponge base material with embedded fluororesin particles and catalyst metal particles. This composite material approach enhances cleaning power by integrating multiple functional components (mechanical cleaning from sponge, electrostatic prevention from fluororesin, and catalytic cleaning enhancement) into a single tool, resolving the contradiction between simple structure and sufficient cleaning power.
Solution Approach 2:
The cleaning tool implements local quality by creating regions with different particle distribution densities. The surface layer contains fluororesin particles for electrostatic control, while the interior contains catalyst metal particles for enhanced cleaning. This spatial differentiation of functional properties allows the tool to perform multiple cleaning functions simultaneously without requiring multiple separate components.
2Productivity
If strong cleaning action is applied, then cleaning efficiency improves, but damage to substrate increases
Solution Approach 1:
The cleaning tool changes the parameters of the cleaning action by incorporating catalyst metal particles that enable chemical cleaning mechanisms alongside mechanical cleaning. This allows effective removal of organic contaminants through catalytic oxidation reactions, reducing the need for aggressive mechanical cleaning that could damage the substrate while maintaining high cleaning efficiency.
Solution Approach 2:
The fluororesin particles act as an intermediary that prevents electrostatic charging during the cleaning process. This intermediary function protects the substrate from electrostatic damage that could occur during high-efficiency cleaning operations, while still allowing effective contaminant removal through the PVA sponge and catalyst particles.
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 tool achieves improved cleaning power and reduced damage to substrates by using fluororesin or catalyst particles, which prevent static charging and facilitate effective cleaning without excessive etching, while abrasive grains enhance mechanical removal capabilities.
Implementation Method 1
fluororesin particles, which prevent static charging and facilitate effective cleaning without excessive etching
Implementation Method 2
catalyst metal particles, which prevent static charging and facilitate effective cleaning without excessive etching
Implementation Method 3
abrasive grains enhance mechanical removal capabilities
Data Source
AI summary
A substrate cleaning apparatus comprises a substrate holding roller and an edge cleaner. The substrate holding roller is configured to hold and rotate a substrate to be processed. The edge cleaner is in contact with an edge portion of the substrate to be processed and includes resin material containing fluororesin particles at least in a portion in contact with the substrate to be processed.