Brush Coating and Curing for Longer CMP Cleaning Life
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Solution Overview
Problem
Existing substrate cleaning methods, particularly after chemical mechanical polishing (CMP), face inefficiencies in removing foreign substances, necessitating frequent brush replacements due to wear, which increases operational costs and downtime.
Innovation Solution
A substrate processing apparatus with a chamber, brush, driver, injector, thickness adjuster, and curing device, along with a recovery and purifying system, is employed to enhance the coating and curing process of brushes, extending their replacement cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brush is used for substrate cleaning, then cleaning effectiveness is improved, but brush wear increases requiring frequent replacement
Solution Approach 1:
The patent applies parameter changes by modifying the physical and chemical properties of the brush through coating materials and curing processes. The brush undergoes heat treatment and coating application that change its surface characteristics, hardness, and wear resistance, thereby extending its service life while maintaining cleaning effectiveness.
Solution Approach 2:
The patent uses composite materials by applying coating materials onto the brush surface. These coatings create a composite structure combining the base brush material with enhanced surface layers that provide improved durability and wear resistance, allowing the brush to maintain its cleaning function for longer periods.
2Duration of action of stationary object
If coating material is applied to the brush, then brush durability is improved, but process complexity increases
Solution Approach 1:
The patent merges multiple functions into an integrated coating apparatus that combines coating material application, thickness adjustment, and curing capabilities in a single system. This consolidation reduces overall process complexity while achieving the goal of extending brush service life through proper coating application.
Solution Approach 2:
The patent controls coating thickness as a key parameter to optimize the balance between brush durability improvement and process complexity. By precisely adjusting and maintaining optimal coating thickness, the system achieves extended brush life without requiring excessively complex multi-layer coating processes.
3Manufacturing precision
If coating thickness is adjusted, then coating quality is improved, but processing time increases
Solution Approach 1:
The patent applies preliminary action by pre-adjusting the coating thickness parameters before the actual coating process. The thickness adjuster is configured in advance to deliver the optimal coating thickness, eliminating the need for time-consuming post-processing adjustments and multiple coating passes, thereby achieving uniform coating quality efficiently.
Solution Approach 2:
The patent optimizes the relationship between coating thickness and processing time by identifying and maintaining the optimal thickness parameter. This allows the system to achieve sufficient coating quality for brush durability extension without unnecessarily increasing processing time through excessive thickness application.
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 improves the efficiency and longevity of brush cleaning by ensuring uniform coating and curing, reducing the frequency of brush replacements and enhancing the cleaning process's overall effectiveness.
Implementation Method 1
an injector configured to inject a coating material onto a surface of the brush when the brush is rotated
Implementation Method 2
a curing device configured to cure the coating material having an adjusted thickness on the brush
Data Source
AI summary
A substrate processing apparatus is provided. The substrate processing apparatus includes a chamber, a brush within the chamber, a driver configured to rotate the brush, an injector configured to inject a coating material onto a surface of the brush when the brush is rotated, a thickness adjuster configured to adjust a thickness of the coating material on the brush when the brush is rotated, and a curing device configured to cure the coating material having an adjusted thickness on the brush.