Hydrophobic Applicators for CMP Component Maintenance

Solution Overview

Problem

Chemical mechanical polishing (CMP) systems face issues with the accumulation of dried abrasive particles on surfaces, leading to scratches on semiconductor substrates due to the degradation of hydrophobicity on CMP component surfaces, which increases maintenance time and labor.

Innovation Solution

The use of hydrophobicity applicators, including an open-celled foam material impregnated with a hydrophobicity causing chemical solution, applied to CMP system components to restore and maintain hydrophobic surfaces, reducing polishing fluid residue accumulation and preventing scratches.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If CMP system components are used without hydrophobic treatment, then the system can operate continuously, but polishing fluid residue accumulates on surfaces causing substrate damage

Engineering Contradiction:

Improvesubstrate surface qualityVSAvoidmaintenance time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies hydrophobic treatment to CMP system components before they are installed and used. This preliminary action creates a protective hydrophobic surface layer that prevents polishing fluid residue accumulation from the start, eliminating the need for frequent maintenance interventions and substrate repairs.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The hydrophobic surface treatment enables the CMP system components to self-protect against residue accumulation. The hydrophobic properties cause polishing fluid to bead up and roll off surfaces rather than adhering, allowing the system to maintain substrate surface quality automatically without requiring external maintenance actions.

Inventive Principle:

Principle #25Self-service

2Reliability

If hydrophobic treatment is applied frequently to maintain surface hydrophobicity, then substrate surface quality is improved, but maintenance labor and time increase

Engineering Contradiction:

Improvesubstrate surface qualityVSAvoidmaintenance operation simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent applies hydrophobic treatment to CMP system components before they are installed and used. This preliminary action creates a protective hydrophobic surface layer that prevents polishing fluid residue accumulation from the start, eliminating the need for frequent maintenance interventions and substrate repairs.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If CMP systems operate in wet environment with polishing fluid, then polishing process can be performed, but dried abrasive particle accumulation occurs on surfaces

Engineering Contradiction:

Improvepolishing process capabilityVSAvoidabrasive particle accumulation

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The hydrophobic surface treatment enables the CMP system components to self-protect against residue accumulation. The hydrophobic properties cause polishing fluid to bead up and roll off surfaces rather than adhering, allowing the system to maintain substrate surface quality automatically without requiring external maintenance actions.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent converts the harmful effect of polishing fluid contact into a beneficial effect by using the fluid's own properties. The hydrophobic treatment causes polishing fluid to bead up and roll off surfaces, transforming the potential harm of fluid accumulation into a self-cleaning mechanism where the fluid literally rolls off the surface taking potential contaminants with it.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 method effectively reduces polishing fluid residue accumulation, decreases maintenance time, and extends the useful lifetime of CMP components by maintaining hydrophobicity, thereby minimizing substrate damage and improving system efficiency.

Implementation Method 1

applying a hydrophobicity causing chemical solution to the surface of the polishing system component

Methodology Applied

Scientific EffectHydrophobicity: Hydrophobe

Implementation Method 2

an applicator article formed of an open-celled foam material which has a porosity of about 60% or more and a hydrophobicity causing chemical solution

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS11986925B2Maintenance methods for polishing systems and articles related thereto

Publication Date: 2024.05.21 APPLIED MATERIALS INC

AI summary

Chemically impregnated applicators used to provide hydrophobic surfaces on chemical mechanical polishing system components and related application methods are shown. A method of forming a hydrophobic coating on a surface of a polishing system component includes cleaning the surface of the polishing system component to remove a polishing fluid residue therefrom and applying a hydrophobicity causing chemical solution to the surface of the polishing system component.