Epitaxial Reactor Covering System for Thermal Insulation
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Solution Overview
Problem
The existing reaction chambers for epitaxial reactors lack effective chemical and thermal insulation, leading to soiling of inner surfaces and uneven temperature control, which affects the quality and thickness uniformity of semiconductor material deposition.
Innovation Solution
A reaction chamber design with a non-contact covering system comprising a lower and upper covering element made of transparent quartz, forming an inner space within the cavity, isolated from the outer space by a constant contact, to improve insulation and allow for local temperature control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If no lower counter-wall is provided in the covering system, then the structure remains simple, but chemical and thermal insulation of the inner space deteriorates
Solution Approach 1:
The covering system is segmented into multiple counter-walls (first vertical counter-wall, second vertical counter-wall, and lower counter-wall) that collectively form a complete enclosure. This segmentation allows each wall to perform its insulation function independently while contributing to the overall reliability of the inner space protection.
Solution Approach 2:
The lower counter-wall acts as an intermediary element that bridges the gap between the first and second vertical counter-walls at the bottom level. This intermediary structure completes the enclosing system, preventing harmful factors from affecting the inner space while maintaining the non-contact design principle.
2Loss of energy
If the covering system uses non-contact design with gas cavity, then thermal insulation improves, but chemical insulation and soiling prevention deteriorate
Solution Approach 1:
The covering system employs multiple segmented counter-walls (lower, first vertical, second vertical) that collectively create a complete enclosed space. This segmentation ensures that both thermal insulation (through gas cavity) and chemical insulation (through continuous enclosure) are achieved simultaneously, preventing soiling of the reaction chamber walls.
3Device complexity
If the inner space is not fully enclosed, then the covering system remains simple, but temperature control precision deteriorates
Solution Approach 1:
The enclosure is segmented into three distinct counter-wall components (lower, first vertical, second vertical) that work together to form a complete sealed space. This segmentation enables precise temperature control within the inner space while maintaining structural simplicity and ease of assembly.
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
Enhances chemical and thermal insulation, reduces soiling, and enables precise temperature control in the lower area of the reaction chamber, resulting in high-quality and uniform semiconductor material deposition.
Implementation Method 1
The covering system located within the cavity serves to define an inner space within the cavity and an outer space also within the cavity, improving thermal insulation of the inner space
Implementation Method 2
there being an empty cavity in between—the reactor is made in such a way that in general there is gas in the cavity and in particular during the reaction and deposition processes there is gas in the cavity
Data Source
AI summary
The reaction chamber (100) comprises a covering system (90) that is located within its cavity (101) and comprises at least one lower covering element (120) resting on a lower wall of the cavity, and an upper covering element (130) resting on the lower covering element (120); the lower covering element (120) and the upper covering element (130) define an insulated inner space to accommodate at least one substrate, and make four walls surrounding this inner space and are spaced apart from the cavity walls; the walls of the chamber (100) are typically made of quartz and the covering system (90) is typically made of quartz.