Multi-Unit Reaction Chamber Assembly for Uniform Epitaxial Throughput
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Solution Overview
Problem
Existing epitaxial growth reactors face challenges in achieving high throughput while maintaining deposition quality, particularly in batch processes, and are prone to parasitic deposition, especially with materials like silicon carbide, leading to increased maintenance needs.
Innovation Solution
A reaction chamber assembly with separate deposition units for at least two substrates, each unit being removable for easy maintenance, and a compact design with independent heating capabilities, utilizing insulating materials and induction heating to control temperature uniformly across units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If batch processes are used to increase throughput, then productivity is improved, but manufacturing precision deteriorates due to inability to independently control temperature and rotation speeds of multiple substrates
Solution Approach 1:
The reaction chamber is divided into multiple independent deposition units (first deposition unit and second deposition unit), each with its own substrate holder, heating element, and control system. This segmentation allows each unit to independently process substrates with separate temperature and rotation speed control, enabling batch processing while maintaining single-wafer-level precision for each substrate.
2Productivity
If multiple reaction chambers are used to increase throughput, then productivity is improved, but device complexity increases and footprint is enlarged
Solution Approach 1:
Multiple deposition units are merged into a single reaction chamber assembly that can be handled as one integrated unit. The first and second deposition units share common structural support, insulation system, and can be simultaneously installed or removed from the reaction chamber, reducing device complexity and footprint while maintaining the capability to process multiple substrates in parallel.
3Ease of repair
If deposition units are made removable for easy maintenance, then ease of repair is improved, but device complexity increases due to coupling mechanisms
Solution Approach 1:
The deposition units are pre-equipped with coupling mechanisms that enable quick connection and disconnection without requiring complex assembly or disassembly procedures. The coupling structures are designed to be engaged or disengaged in a single operational step, allowing rapid removal of deposition units for maintenance while minimizing the complexity added to the overall system.
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 enables high-quality epitaxial deposition with increased throughput, reduces parasitic deposition, and simplifies maintenance by allowing for automated and air-free access to deposition units, while maintaining a compact footprint.
Implementation Method 1
an insulating system comprising an intermediate insulating element positioned between the at least two casings
Implementation Method 2
utilizing insulating materials and induction heating to control temperature uniformly across units
Data Source
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AI summary
A reaction chamber assembly for a reactor for the epitaxial deposition of a semiconductor film on at least two substrates, comprising: (a) an enclosure, (b) at least two casings contained within said enclosure, (c) at least two deposition units, and (d) an insulating system. Each casing contains at least one deposition unit. Each deposition unit is provided with at least one receiving area adapted to receive a substrate holder and suitable for the epitaxial deposition of a semiconductor film on a substrate. The insulating system comprises an intermediate insulating element positioned between the at least two casings.