Brush Particle Collection and Detection for Substrate Cleanliness
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Solution Overview
Problem
Existing brush cleaning methods risk substrate contamination due to particle adherence and lack effective methods for measuring and managing brush contamination levels, leading to potential substrate defects.
Innovation Solution
A brush processing apparatus with a particle collection platform, coils to generate a magnetic field, a spray nozzle for cleaning, and sensors to analyze particles, allowing for particle collection, measurement, and contamination assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brush is used to clean substrates, then cleaning effectiveness is improved, but particle adherence to the brush causes reverse contamination of substrates
Solution Approach 1:
The system incorporates a sensor that detects particles on the brush in real-time and provides feedback to a controller. When particle accumulation reaches a threshold level, the controller automatically controls the discharge mechanism to release particles from the brush, preventing reverse contamination while maintaining cleaning effectiveness
Solution Approach 2:
A magnetic field is introduced as an intermediary force between the brush and particles. The magnetic field attracts and holds particles on the brush during cleaning operations, allowing effective substrate cleaning while preventing particle transfer to new substrates. The magnetic field acts as a mediator that separates the cleaning function from the contamination risk
2Reliability
If brush replacement is performed frequently, then reverse contamination is prevented, but manufacturing cost and downtime increase
Solution Approach 1:
The sensor continuously monitors particle accumulation on the brush and provides feedback to the controller. The system only triggers particle discharge when actual contamination levels reach predetermined thresholds, avoiding unnecessary brush replacements and optimizing the balance between cleanliness and productivity
Solution Approach 2:
The brush system performs self-maintenance through automatic particle discharge controlled by the sensor-feedback system. Instead of requiring frequent manual replacements, the brush automatically removes its own contaminants based on real-time detection, extending its usable life while maintaining cleaning effectiveness
3Measurement precision
If particles are collected and measured on the brush, then contamination level is monitored, but device complexity increases
Solution Approach 1:
A magnetic field is used as an intermediary to concentrate and hold particles in a specific region on the brush. This magnetic concentration simplifies the measurement process by gathering particles in one location, making them easier to detect and quantify with the sensor without requiring complex collection mechanisms
Solution Approach 2:
The system replaces complex mechanical particle collection and measurement mechanisms with a magnetic field-based concentration system and optical/electrical sensing. The magnetic field performs the concentration function that would otherwise require mechanical collection devices, while the sensor provides measurement capability with simpler instrumentation
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
Effectively removes particles from brushes, measures their amount, and prevents substrate contamination by suggesting timely brush replacement, thereby maintaining substrate cleanliness.
Implementation Method 1
at least one coil inside the particle collection platform and configured to generate a magnetic field
Implementation Method 2
measuring the amount of particles by measuring a temperature of the particles, a wavelength of light, and a magnetization of the particles
Implementation Method 3
measuring the amount of particles by measuring a temperature of the particles, a wavelength of light, and a magnetization of the particles
Implementation Method 4
measuring the amount of particles by measuring a temperature of the particles, a wavelength of light, and a magnetization of the particles
Data Source
AI summary
A brush processing apparatus includes a particle collection platform having a rectangular prism shape, at least one coil inside the particle collection platform and configured to generate a magnetic field, a spray nozzle configured to spray fluid to clean a brush, and a sensor configured to analyze particles collected on the particle collection platform.