Process Tube Flange Cooling to Prevent Seal Overheating and Condensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing substrate processing systems face challenges in maintaining optimal flange temperatures to prevent overheating of seals and condensation of reaction by-products, which can degrade the quality of deposited layers.
Innovation Solution
A flange design with a cooling channel and a material with a heat conductivity between 0.1 and 40 W/m K is used, allowing a cooling fluid to flow and cool the flange while maintaining adequate heat transfer to prevent condensation and overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the flange temperature is increased to prevent condensation of reaction by-products, then condensation is avoided, but the seal may overheat and start leaking
Solution Approach 1:
The flange is designed with non-uniform thermal properties - the region near the process tube opening has higher heat conductivity to prevent condensation, while the region near the seal has lower heat conductivity to protect it from overheating. This spatial variation in thermal properties allows simultaneous prevention of condensation and overheating in different locations of the same component.
Solution Approach 2:
A material layer with specific heat conductivity (0.1-40 W/mK) is introduced as an intermediary between the cooling fluid and the flange. This intermediary material mediates heat transfer, allowing controlled cooling of the flange to prevent seal overheating while maintaining sufficient temperature to avoid condensation of reaction by-products.
2Reliability
If the flange is cooled to protect the seal from overheating, then seal leakage is prevented, but condensation of reaction by-products may occur
Solution Approach 1:
The flange incorporates spatially varying thermal conductivity - higher near the process tube opening to prevent condensation, and lower near the seal to prevent overheating. This local differentiation allows the flange to maintain different effective temperatures in different regions, simultaneously preventing both condensation and seal leakage.
Solution Approach 2:
The heat conductivity of the flange material is controlled within a specific range (0.1-40 W/mK) to optimize the balance between preventing condensation and protecting the seal. By adjusting this material parameter, the flange can maintain appropriate temperature distribution under varying operating conditions.
3Reliability
If a cooling channel is added to cool the flange, then seal overheating is prevented, but the device complexity increases
Solution Approach 1:
The cooling channel is integrated directly into the flange structure rather than being a separate component. The flange body itself forms the cooling channel pathway, combining the structural and cooling functions into a single integrated component, thereby minimizing additional complexity.
Solution Approach 2:
The cooling fluid flows through the flange structure itself, using the flange's own geometry to provide cooling. The flange serves both as a structural support and as its own cooling system, eliminating the need for external cooling apparatus and reducing overall system complexity.
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 effectively prevents overheating of seals and minimizes condensation of reaction by-products, ensuring consistent high-quality process results by maintaining optimal flange temperatures.
Implementation Method 1
a cooling channel for allowing a cooling fluid to flow there through and cool the flange
Implementation Method 2
A material with a heat conductivity between 0.1 and 40 W/m K is at least partially provided in between the cooling fluid and the rest of the flange
Implementation Method 3
a seal to seal the process chamber
Data Source
AI summary
The disclosure relates to a flange for a process tube in an apparatus for processing substrates, e.g., a vertical furnace. The flange may be provided with an opening for in use giving access to the process chamber of the process tube and a cooling channel for allowing a cooling fluid to flow there through and cool the flange. A material with a heat conductivity between 0.1 and 40 W/m K may be at least partially provided in between the cooling fluid and the rest of the flange.