Quartz Reactor Casing Assembly With Plastic Flanges for Reliable Joining
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Solution Overview
Problem
The welding of concentric quartz tubes for reactor enclosures in epitaxial deposition systems is unreliable, leading to high manufacturing costs and procurement issues due to irreparable damage, and the process is largely artisanal with unpredictable yield.
Innovation Solution
A casing assembly comprising a quartz inner and outer casing connected by engineering plastic flanges, creating a liquid-tight interspace for cooling fluid circulation, which avoids the need for welding and uses engineering plastic flanges to ensure structural integrity and ease of manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding is used to join concentric quartz tubes, then structural integrity is achieved, but manufacturing reliability deteriorates due to irreparable damage and unpredictable yield
Solution Approach 1:
A metal insert is introduced as an intermediary element between the inner and outer quartz tubes. The insert is made of a material compatible with both quartz tubes and provides a reliable joining mechanism through mechanical interference and chemical bonding, eliminating the need for direct welding between quartz tubes while ensuring structural integrity and manufacturing reliability
Solution Approach 2:
The joining structure becomes a composite system combining quartz tubes with a metal insert. This composite approach leverages the advantages of both materials: quartz provides chemical inertness and heat resistance, while the metal insert provides mechanical strength and reliable joining, resolving the contradiction between structural integrity and manufacturing reliability
2Reliability
If welding process is used for quartz tubes, then enclosure sealing is achieved, but manufacturing complexity increases due to artisanal process requirements
Solution Approach 1:
The metal insert serves as a mediator that simplifies the joining process. Instead of requiring complex welding operations between quartz tubes, the insert provides standardized mechanical and chemical bonding interfaces, reducing manufacturing complexity while ensuring reliable enclosure sealing
Solution Approach 2:
The welding process is replaced with a mechanical joining system using the metal insert. This substitution eliminates the need for skilled welders and complex welding equipment, reducing manufacturing complexity while maintaining sealing reliability through mechanical interference and chemical bonding
3Strength
If welding is used to join quartz tubes, then structural integrity is achieved, but manufacturing cost increases due to irreparable damage
Solution Approach 1:
The metal insert acts as a sacrificial intermediary that protects the expensive quartz tubes from damage during joining. The insert absorbs the mechanical stresses of joining, preventing irreparable damage to the quartz tubes, thereby reducing manufacturing costs while maintaining structural integrity
Solution Approach 2:
The metal insert provides beforehand cushioning by being positioned between the quartz tubes before joining. This pre-positioned intermediary absorbs and distributes mechanical stresses, preventing damage to the quartz tubes and reducing manufacturing costs associated with repairs or replacements
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 provides a cost-effective, efficient, and reliable enclosure for epitaxial deposition reactors, maintaining structural integrity at high temperatures while reducing manufacturing complexity and costs.
Implementation Method 1
maintaining structural integrity at high temperatures
Implementation Method 2
creating a liquid-tight interspace for cooling fluid circulation
Implementation Method 3
These temperatures may be achieved via an induction heating system, for example comprising an induction coil wrapped around the reaction chamber
Implementation Method 4
induction heating system, for example comprising an induction coil wrapped around the reaction chamber and connected to a power generation circuit
Implementation Method 5
graphite features high susceptivity and will heat up effectively under an alternating electromagnetic field
Data Source
AI summary
The present invention relates to a casing assembly of a reactor for the epitaxial deposition of semiconductor films on a substrate. The casing assembly comprises an inner and an outer casing made of quartz and connected by at least two flanges made of engineering plastics. The invention also relates to a reaction chamber enclosed by said casing assembly, and a reactor employing at least one of said reaction chambers.