Reflective Metallic Alloy Chamber Components for Semiconductor Processing
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Solution Overview
Problem
Current semiconductor processing chamber components are inefficient and costly in directing energy towards substrates due to energy loss and high replacement costs, particularly in epitaxial deposition processes requiring precise temperature control.
Innovation Solution
The use of highly reflective metallic alloys with surface roughness of 5.0 nanometers or less for chamber components, such as reflectors or heat shields, which can efficiently direct thermal energy towards substrates without the need for additional coatings, reducing manufacturing time and costs while extending operational lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional chamber components are used to direct energy toward substrates, then energy can be directed to some extent, but energy loss occurs and components are expensive to replace
Solution Approach 1:
The patent changes the surface roughness parameter of the metallic alloy to 5.0 nanometers or less, transforming it from a conventional rough surface to a highly polished reflective surface. This parameter change enables the material to function as an efficient thermal mirror, significantly reducing energy loss while maintaining component durability and eliminating the need for expensive coatings or frequent replacements
Solution Approach 2:
The patent employs a metallic alloy composite that combines the inherent properties of metal (strength, thermal conductivity) with a highly polished surface finish (low roughness ≤5.0 nm). This composite structure achieves both mechanical durability and optical/thermal reflectivity, resolving the contradiction between energy efficiency and component lifespan without requiring additional protective coatings
2Use of energy by moving object
If expensive components are used to direct energy toward substrates, then energy direction capability is improved, but manufacturing cost and replacement cost increase
Solution Approach 1:
The patent replaces expensive, delicate energy-directing components with a durable metallic alloy that can be manufactured cost-effectively. The alloy's inherent strength and the simplicity of the polishing process (compared to coating applications) reduce both initial manufacturing costs and replacement costs, while the component's durability eliminates the 'short-living' aspect
Solution Approach 2:
The metallic alloy inherently provides both structural support and energy reflection functions through its material properties and surface finish. This self-service capability eliminates the need for separate, expensive components or complex coating applications, reducing manufacturing complexity and cost while maintaining high energy direction efficiency
3Illumination intensity
If additional coatings are applied to chamber components to improve reflectivity, then energy reflection is enhanced, but manufacturing time and complexity increase
Solution Approach 1:
The patent extracts the reflectivity function from separate coatings and integrates it directly into the metallic alloy material itself through surface polishing. By taking out the need for additional coating layers and making the base material inherently reflective through controlled surface roughness (≤5.0 nm), the manufacturing process is simplified and time is reduced while maintaining high reflectivity
Solution Approach 2:
The patent merges the structural function and the reflective function into a single integrated component - the metallic alloy with polished surface. Instead of having a separate substrate and separate coating layer, the alloy itself provides both mechanical support and thermal reflection, eliminating the need for additional coating steps and reducing manufacturing time
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
This solution enhances energy efficiency, reduces manufacturing and operational costs, and extends the lifespan of semiconductor processing chamber components by maintaining high reflectivity and thermal performance.
Implementation Method 1
one or more chamber components positioned to reflect energy emitted from the one or more heat sources through at least one of the upper window or the lower window and into the internal volume
Data Source
AI summary
Embodiments described herein generally relate to highly reflective metallic alloys for components (such as chamber components) of semiconductor processing equipment, and related methods and processing chambers. In one or more embodiments, a processing chamber applicable for use in semiconductor manufacturing includes a chamber body having an internal volume, and one or more heat sources configured to provide heat to the internal volume. The processing chamber includes an upper window and a lower window. The processing chamber includes one or more chamber components positioned to reflect energy emitted from the one or more heat sources through at least one of the upper window or the lower window and into the internal volume, the one or more chamber components comprising a metallic alloy and one or more reflective surfaces having a surface roughness (Ra) that is 5.0 nanometer or less.