Semiconductor Reflector Assembly Temperature Control
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Solution Overview
Problem
In semiconductor manufacturing, maintaining uniform temperature of chamber components is challenging, leading to undesired depositions and increased cleaning frequencies, which affect processing efficiency and product yield.
Innovation Solution
A processing kit and system that includes a reflector assembly with a baffle and fluid channel to adjust the temperature of sensing devices, and a method involving the flow of purging fluids through specific pathways to control the temperature of chamber components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the temperature of chamber components is not controlled, then processing is simpler and requires fewer components, but undesired depositions occur on chamber components affecting temperature uniformity and product yield
Solution Approach 1:
The patent introduces a reflector assembly as an intermediary component between the heat source and chamber components. This reflector assembly includes sensing devices that detect thermal conditions and control systems that adjust reflector positioning or properties to mediate heat distribution, thereby achieving temperature uniformity without directly heating or cooling the chamber components themselves
Solution Approach 2:
The patent replaces traditional mechanical thermal control systems (heaters, coolers, thermal shields) with an optical-based system using reflectors. By controlling the reflection and distribution of thermal radiation through adjustable reflector surfaces and positioning, the system achieves temperature uniformity without complex thermal management hardware
2Manufacturing precision
If chamber cleaning is performed frequently to remove undesired depositions, then deposition uniformity and product yield are maintained, but product throughput decreases due to cleaning downtime
Solution Approach 1:
The patent implements preliminary action by continuously monitoring thermal conditions with sensing devices and making proactive adjustments to the reflector assembly before undesired depositions can form on chamber components. This preventive approach maintains optimal temperature uniformity throughout processing, preventing the need for frequent cleaning interruptions
Solution Approach 2:
The patent incorporates feedback mechanisms through sensing devices that continuously monitor temperature distribution and deposition conditions. This real-time feedback enables dynamic adjustment of the reflector assembly to maintain optimal thermal conditions, preventing deposition uniformity degradation without requiring scheduled cleaning downtime
3Measurement precision
If the temperature of sensing devices is not adjusted, then the system is simpler, but undesired depositions occur on the sensing devices affecting measurement accuracy
Solution Approach 1:
The patent merges the temperature control function with the sensing device by integrating thermal management capabilities directly into the sensing device housing or mounting structure. The reflector assembly serves dual purposes: directing thermal radiation for processing and providing a controlled thermal environment for the sensing devices, thereby maintaining measurement accuracy without adding separate temperature control systems
Solution Approach 2:
The sensing devices are designed with self-regulating thermal characteristics or passive thermal management features that maintain their operating temperature without active control. The reflector assembly geometry and material properties are configured to naturally shield or thermally couple the sensing devices to maintain stable temperatures, eliminating the need for complex active temperature control systems
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 effectively reduces undesired depositions on chamber components, minimizing cleaning frequencies and enhancing processing efficiency by maintaining optimal surface temperatures.
Implementation Method 1
The reflector assembly further includes a baffle and a fluid channel disposed within the baffle. The fluid channel is configured to flow a fluid to adjust a temperature of the one or more sensing devices
Implementation Method 2
A ring is disposed on the top surface. The ring is configured to reduce a flow of a fluid into the volume
Implementation Method 3
A reflector is concentrically disposed radially outward of the outer surface and creates a gap that allows the fluid to partially flow between the inner surface of the reflector and the outer surface
Data Source
AI summary
In one or more embodiments, a semiconductor processing kit includes a reflector assembly. The reflector assembly configured to support one or more sensing devices therein. The reflector assembly includes a body having a top surface and a volume at least partially defined by an inner surface and an outer surface. The reflector assembly further includes a baffle and a fluid channel disposed within the baffle. The fluid channel is configured to flow a fluid to adjust a temperature of the one or more sensing devices. A ring is disposed on the top surface. The ring is configured to reduce a flow of a fluid into the volume. A reflector is concentrically disposed radially outward of the outer surface and creates a gap that allows the fluid to partially flow between the inner surface of the reflector and the outer surface.