CMP Polishing Pad Replacement Using Magnetic Pad Attachment

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Solution Overview

Problem

The existing chemical mechanical polishing process is inefficient due to manual replacement of polishing pads, which results in high manpower costs, variable attachment quality, and prolonged replacement times, affecting the polishing process efficiency.

Innovation Solution

A chemical mechanical polishing apparatus and method that utilizes a polishing pad carrier with magnetic and/or adsorption features to automate the attachment and detachment of polishing pads, including a magnetic sub-pad and a cutting mechanism to efficiently manage pad replacement, reducing human intervention and improving attachment consistency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If manual replacement of polishing pad is used, then flexibility in operation is maintained, but replacement time increases and attachment quality becomes variable

Engineering Contradiction:

Improveflexibility in operationVSAvoidreplacement time

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent replaces manual mechanical operations with an automated mechanical system. The polishing pad carrier automatically transports pads from the supply area to the polishing table, and the magnetic attachment feature automatically secures pads without human intervention. This substitution eliminates variability in manual operation while maintaining system flexibility through programmable control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system enables self-service replacement where the polishing apparatus performs its own pad replacement without external human assistance. The automated carrier system and magnetic attachment mechanism work together to complete the entire replacement cycle autonomously, reducing both replacement time and human labor requirements while ensuring consistent attachment quality.

Inventive Principle:

Principle #25Self-service

2Device complexity

If manual attachment of polishing pad is used, then equipment complexity is reduced, but attachment quality becomes inconsistent

Engineering Contradiction:

Improveequipment complexityVSAvoidattachment quality

Core Design Contradiction:

Device complexityVSManufacturing precision

Solution Approach 1:

The patent introduces a magnetic attachment feature that replaces manual attachment mechanisms. This magnetic system provides consistent, uniform attachment force across the entire polishing pad surface, ensuring high attachment quality. The simplicity of the magnetic field generation keeps added complexity minimal while dramatically improving attachment consistency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic attachment feature allows precise control of attachment parameters such as magnetic field strength and distribution. By adjusting these parameters, the system achieves optimal and consistent attachment quality for different pad materials and polishing conditions, something difficult to achieve with manual attachment methods.

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If automated carrier system is introduced, then replacement time decreases, but device complexity increases

Engineering Contradiction:

Improvereplacement timeVSAvoiddevice complexity

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent employs an automated carrier system that mechanically transports polishing pads from the supply area to the attachment location. This automation dramatically reduces replacement time by eliminating manual handling steps. The carrier system integrates with existing apparatus components, minimizing the increase in overall device complexity while achieving significant time savings.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 solution significantly reduces replacement variables and process costs by automating the polishing pad replacement process, ensuring consistent attachment and minimizing downtime, thereby enhancing the overall efficiency and reliability of the polishing operation.

Implementation Method 1

a magnetic feature and/or an adsorption feature to attach the polishing pad to the polishing table

Methodology Applied

Scientific EffectMagnetic force: Magnetism

Implementation Method 2

a magnetic feature and/or an adsorption feature to attach the polishing pad to the polishing table

Methodology Applied

Scientific EffectAdsorption: Adsorption

Data Source

PatentUS20240217057A1Chemical mechanical polishing apparatus and method of replacing polishing pad using the same

Publication Date: 2024.07.04 SAMSUNG ELECTRONICS CO LTD

AI summary

The present disclosure relates to a chemical mechanical polishing apparatus and a method of replacing a polishing pad using the same. The chemical mechanical polishing apparatus includes: a polishing table; a polishing pad attachment feature on a surface of the polishing table; a polishing pad supply area outside the polishing table; and a polishing pad carrier configured to move a polishing pad from the polishing pad supply area to the polishing pad attachment feature, wherein the polishing pad attachment feature includes a magnetic feature and/or an adsorption feature to attach the polishing pad to the polishing table.