Self-Conditioning Cleaning Brush for Semiconductor Surface Purity
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Solution Overview
Problem
Existing cleaning technologies struggle to effectively remove contaminants from ultra-clean semiconductor surfaces, particularly after chemical mechanical polishing, which can distort structural shape and deteriorate electrical characteristics, especially in nanometer-level devices.
Innovation Solution
A cleaning brush system with a cylindrical body and protrusions featuring different copolymers, including hydrophobic and hydrophilic compositions, combined with a self-conditioning mechanism using a cleaning brush conditioner to repeatedly adsorb and remove contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single-material cleaning brush is used, then the structure is simple and easy to manufacture, but it cannot effectively remove all types of contaminants and may cause reverse contamination
Solution Approach 1:
The cleaning brush incorporates different materials at different locations: the cylindrical body is made of a hydrophobic material (first copolymer) while the cleaning protrusions are made of a hydrophilic material (second copolymer). This local differentiation allows the brush to effectively remove both hydrophobic and hydrophilic contaminants, preventing reverse contamination while maintaining a relatively simple overall structure.
2Reliability
If a cleaning brush with multiple materials is used, then cleaning effectiveness improves, but the manufacturing process becomes more complex
Solution Approach 1:
The cleaning brush is segmented into two distinct functional parts: a cylindrical body made of hydrophobic material and cleaning protrusions made of hydrophilic material. This segmentation allows each part to be optimized for specific contaminant types while simplifying the manufacturing process, as each material can be applied or attached to its designated location without requiring complex multi-material processing throughout the entire brush.
3Manufacturing precision
If traditional cleaning methods are used, then the process is simple, but contaminants remain on the surface affecting device yield
Solution Approach 1:
The cleaning system employs composite materials with complementary properties: a hydrophobic cylindrical body (first copolymer) combined with hydrophilic cleaning protrusions (second copolymer). This composite structure enables the brush to simultaneously address different types of contaminants through mechanisms including adsorption, abrasion, and emulsification, achieving ultra-clean surfaces required for nanometer-level device manufacturing.
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 system enhances semiconductor device reliability by preventing reverse contamination and maintaining surface cleanliness, ensuring effective removal of contaminants and preserving device performance.
Implementation Method 1
a surface of the cleaning brush includes a first composition including a first copolymer, and the first copolymer includes a hydrophobic copolymer
Implementation Method 2
a surface of the at least one cleaning protrusion includes a second composition including a second copolymer, and the second copolymer includes a hydrophilic copolymer
Implementation Method 3
a cleaning brush conditioner configured to rotate... capable of improving reliability by preventing reverse contamination
Data Source
AI summary
A cleaning brush system includes a cleaning brush including a cylindrical body including a first end and a second end opposite to the first end and at least one cleaning protrusion protruding from the cylindrical body, where a surface of the cylindrical body includes a first composition including a first copolymer, and a surface of the at least one cleaning protrusion includes a second composition including a second copolymer.