Monolithic Susceptor End Module for High-Temperature Stability
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Solution Overview
Problem
The modular composition of existing susceptors, which are used in high-temperature inert gas and vacuum process systems, leads to instability during loading and unloading due to high forces acting on the floor area, resulting in potential material breakage or failure, especially at the loading opening.
Innovation Solution
Designing a susceptor with monolithic end modules connected directly to the loading opening and a continuous base plate with anchored circle segments, allowing for stable loading and unloading by distributing loads evenly and accommodating thermal expansion without compromising tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the susceptor is made with a modular composition of multiple elements, then the thermal expansion behavior becomes homogeneous and predictable, but the load-bearing capacity at the loading opening decreases leading to material breakage
Solution Approach 1:
The susceptor is divided into modular segments that can be assembled together. Each module has standardized connection interfaces allowing for homogeneous thermal expansion behavior while distributing mechanical loads across multiple connection points rather than concentrating them at a single weak point.
Solution Approach 2:
The connection elements are designed to merge the modular segments into a unified structure with continuous load paths. The connection interfaces are reinforced to create a combined structure that maintains the load-bearing capacity equivalent to a monolithic design while preserving the benefits of modular assembly.
2Ease of manufacture
If the susceptor floor is made of multiple individual elements, then the manufacturing and assembly become more flexible, but the stability during loading and unloading decreases due to high forces acting on the first module
Solution Approach 1:
The connection interfaces between modular elements are pre-reinforced with strengthening features such as ribs, gussets, or increased material density at the connection zones. This preliminary strengthening ensures that when high forces act on the susceptor during loading and unloading, the connection elements are already prepared to withstand these forces without failure.
Solution Approach 2:
The connection elements utilize composite material structures combining different materials or material densities to achieve both flexibility for assembly and high strength for stability. The composite structure allows the connection zones to be more rigid and load-bearing while the main body segments remain manufacturable with standard processes.
3Strength
If the first susceptor module at the loading opening is designed to handle heavy loads, then the load-bearing capacity increases, but the thermal expansion homogeneity is compromised
Solution Approach 1:
The first module at the loading opening is designed with local quality variations where specific zones have enhanced load-bearing properties through reinforced walls, additional support structures, or material reinforcement. These local strengthening features are strategically placed only where mechanical loads are applied, while the rest of the module maintains the standard thermal expansion characteristics to ensure homogeneous behavior across the entire susceptor.
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 susceptor design enhances stability at both loading and inspection openings, preventing damage during material handling and ensuring continuous operation under high temperatures and pressures.
Implementation Method 1
the susceptor must be constructed in such a way that the material can expand as the temperature rises without the susceptor losing its compressive strength
Implementation Method 2
the continuous base plate with anchored circle segments, allowing for stable loading and unloading by distributing loads evenly
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Susceptor for the process chamber of a protective gas and vacuum high-temperature process plant with a circular segment (2) larger than 180° as the body of a tunnel and with a bottom element (3, 7) completing the circular segment (2) to form a closed cross-section, wherein the tunnel is composed of at least two modules, each consisting of a circular segment (2) and a bottom element (3, 7), which are joined at their end faces, and wherein at least one end-face module is designed as a monolithic body (1) with a closed cross-section consisting of a circular segment (2) and a bottom surface (3).