CMP Slurry Composition With Nanoparticles for Temperature Uniformity
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Solution Overview
Problem
Existing chemical mechanical polishing processes face challenges in efficiently controlling polishing temperature, leading to variations in polishing characteristics and reduced productivity and uniformity.
Innovation Solution
A slurry composition for chemical mechanical polishing is developed, comprising polishing particles, an oxidant, a thermo-sensitive agent with high thermal conductivity, and a pH adjuster, which allows for precise temperature control and improved process efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If polishing temperature is increased to improve polishing rate, then productivity is improved, but polishing uniformity deteriorates
Solution Approach 1:
The patent changes the thermal properties of the slurry by adding metal or metal oxide nanoparticles with high thermal conductivity. This modifies the heat transfer parameters in the polishing system, enabling rapid temperature adjustment to achieve both high polishing rates and uniform results by optimizing the balance between chemical reaction speed and thermal stability.
Solution Approach 2:
The patent creates a composite slurry system by combining traditional polishing particles and oxidants with metal or metal oxide nanoparticles. This composite formulation provides both the chemical reactivity needed for high polishing rates and the thermal conductivity required for temperature control and polishing uniformity.
2Manufacturing precision
If polishing temperature is controlled to improve uniformity, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The patent modifies the thermal response parameters of the polishing system by incorporating high thermal conductivity nanoparticles. This enables the system to rapidly reach and maintain optimal polishing temperatures, ensuring uniformity without sacrificing productivity, as the thermal equilibrium is achieved faster than in conventional systems.
Solution Approach 2:
The composite slurry formulation combines temperature-control functionality with polishing functionality, allowing the system to maintain optimal temperatures for uniform polishing while sustaining high polishing rates through the synergistic effects of the composite components.
3Manufacturing precision
If thermal conductivity is increased to improve temperature control, then manufacturing precision is improved, but slurry complexity increases
Solution Approach 1:
The patent achieves improved temperature control by changing the thermal conductivity parameter of the slurry through nanoparticle addition. This single parameter modification provides the desired temperature control capability without requiring complex multi-component formulations or additional processing steps.
Solution Approach 2:
The metal or metal oxide nanoparticles serve as thermal intermediaries that facilitate heat transfer in the slurry. These particles act as a simple yet effective mediator to improve temperature control without introducing complex formulation requirements or processing complications.
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 slurry composition enhances productivity and uniformity by rapidly adjusting polishing temperature, ensuring consistent polishing results and reducing surface defects.
Implementation Method 1
a thermo-sensitive agent including metal nanoparticles or metal oxide nanoparticles having a thermal conductivity of 15 W/(m·K) or higher
Implementation Method 2
an oxidant including a peroxide compound
Data Source
AI summary
Slurry compositions for chemical mechanical polishing, chemical mechanical polishing apparatuses using the same, and methods for fabricating a semiconductor device using the same are provided. The slurry composition for chemical mechanical polishing may include polishing particles in an amount of 0.1% to 10% by weight of the slurry composition, an oxidant in an amount of 0.1% to 5% by weight of the slurry composition, a thermo-sensitive agent in an amount of 0.01% to 30% by weight of the slurry composition. The thermo-sensitive agent may include metal nanoparticles or metal oxide nanoparticles, and water, wherein the slurry composition has a pH of 1 to 8.