Polymer Reflector with Boron Nitride Filler for Semiconductor Process Chambers
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Solution Overview
Problem
Conventional reflectors in semiconductor process chambers, typically made of metal, are costly and time-consuming to manufacture, leading to delays and increased operating costs due to their complexity and the need for frequent replacement.
Innovation Solution
A nonmetallic reflector with a reflective coating, fabricated from polymers and filled with materials like boron nitride or aluminum nitride to enhance thermal conductivity, which includes integrated cooling and reduced component complexity, allowing for faster production and longer service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional metal reflectors are used, then high reflectivity and thermal management are achieved, but manufacturing costs increase and manufacturing complexity increases
Solution Approach 1:
The reflector uses a composite structure combining a polymer base material with thermally conductive filler particles (metal powder, carbon-based structures, diamond, or boron nitride). This composite approach achieves the thermal conductivity needed for heat management while using cheaper polymer materials instead of expensive metals, and the filler particles also contribute to the reflective properties.
Solution Approach 2:
The invention changes the material parameters by selecting polymers with appropriate temperature resistance and combining them with fillers that provide both thermal conductivity and reflectivity. The polymer matrix provides ease of manufacturing and cost benefits, while the filler particles compensate for the lower inherent thermal conductivity and reflectivity of polymers alone.
2Reliability
If conventional metal reflectors are used, then high reflectivity is achieved, but manufacturing time increases
Solution Approach 1:
The composite polymer-filler structure can be manufactured using molding processes that are faster and more automated than traditional metal fabrication methods. The polymer matrix provides a convenient medium for incorporating filler particles, and the entire structure can be formed in a single molding operation rather than requiring multiple metalworking steps.
Solution Approach 2:
By changing from metal to polymer-based materials, the manufacturing process transitions from subtractive metalworking to additive or formative molding processes, significantly reducing manufacturing time and increasing production speed while maintaining the necessary optical and thermal properties through material composition control.
3Temperature
If conventional metal reflectors are used, then thermal management is achieved, but device complexity increases
Solution Approach 1:
The thermally conductive filler particles distributed within the polymer matrix create an integrated thermal management solution. The fillers form conductive pathways throughout the reflector structure, enabling heat dissipation without requiring separate cooling channels or thermal management components, thus simplifying the overall device design.
Solution Approach 2:
The invention merges multiple functions into a single component: the polymer provides structural integrity and ease of manufacturing, the filler particles provide both thermal conductivity and reflectivity, and the integrated structure eliminates the need for separate cooling systems or support structures, reducing overall device complexity.
4Reliability
If conventional metal reflectors are used, then high reflectivity is achieved, but replacement frequency increases
Solution Approach 1:
The polymer-filler composite provides enhanced durability through the reinforcing effect of the filler particles embedded in the polymer matrix. This composite structure resists degradation better than pure polymers and can match or exceed the service life of metal reflectors while maintaining reflectivity through the filler particles' optical properties.
Solution Approach 2:
By selecting polymers with high temperature resistance and appropriate filler materials, the invention achieves a service life comparable to metal reflectors under the same operating conditions. The material parameters are optimized to withstand thermal cycling and mechanical stresses without degrading the reflective or structural properties.
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 nonmetallic reflector reduces manufacturing costs, simplifies spare part production, minimizes downtime, and improves operational efficiency by providing flexible construction and integrated cooling, while maintaining high reflectivity and thermal management.
Implementation Method 1
The reflector is positioned to reflect light emitted from the lamps through the window and into the internal volume
Implementation Method 2
The cooling channel disposed in or on the cylindrical body
Implementation Method 3
The filler includes one or more of boron nitride, aluminum nitride, silicon carbide, carbon-based structures, diamond, or metal powder
Data Source
AI summary
A reflector and processing chamber having the same are described herein. In one example, a reflector is provided that includes cylindrical body, a cooling channel, and a reflective coating. The cylindrical body has an upper surface and a lower surface. The lower surface has a plurality of concave reflector structures disposed around a centerline of the cylindrical body. The cooling channel disposed in or on the cylindrical body. The reflective coating is disposed on the plurality of concave reflector structures.