Stop-Gapped Reaction Chamber Sealing for Low-Particle Planarization
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Solution Overview
Problem
Current nano-fabrication techniques face challenges in achieving precise planarization of semiconductor substrates with irregular height variations, which affects the ability to add further layers and requires additional processes, and existing reaction chambers contribute to particle contamination during substrate handling.
Innovation Solution
A reaction chamber design with an adjustable gap and movable enclosing members, featuring a minimal contact area between components and integrated vacuum ports to reduce contamination and allow for precise substrate handling, includes stops to maintain a controlled gap and vacuum ports for sealing and gas management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reaction chamber walls are made with larger contact area between enclosing members, then the sealing and structural stability are improved, but the particle contamination risk increases due to more contact points
Solution Approach 1:
The reaction chamber walls are segmented into movable enclosing members that can be independently positioned and sealed, allowing the chamber to maintain structural integrity while minimizing contact points between components during operation
Solution Approach 2:
A vacuum seal acts as an intermediary between the movable enclosing members, providing sealing stability without requiring direct mechanical contact between the walls, thereby reducing particle contamination from contact points
2Object-affected harmful factors
If the gap between enclosing members is reduced to minimize contamination, then the sealing effectiveness is improved, but the accessibility for substrate handling deteriorates
Solution Approach 1:
The gap between enclosing members is made dynamically adjustable - it can be opened wide for substrate loading/unloading and then closed tightly during processing to minimize contamination, combining both accessibility and sealing effectiveness
Solution Approach 2:
The chamber is prepared in advance by positioning the movable enclosing members to create an accessible gap for substrate handling, then the gap is closed before processing begins, ensuring both ease of operation and contamination prevention
3Manufacturing precision
If additional planarization processes are added to handle irregular height variations, then the manufacturing precision is improved, but the process complexity and time increase
Solution Approach 1:
The reaction chamber allows dynamic adjustment of the gap size to accommodate varying substrate height profiles, enabling precise planarization through parameter control rather than adding separate planarization process steps
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 design enhances substrate planarization by minimizing particle contamination and improving process control, allowing for more efficient nano-fabrication processes while reducing the risk of particle introduction during chamber opening and closing.
Implementation Method 1
one or more vacuum ports in the first gap surface or the second gap surface
Data Source
AI summary
Some devices and systems comprise one or more walls of a reaction chamber; an adjustable gap in the one or more walls, wherein the adjustable gap is formed between a first gap surface and a second gap surface facing the first gap surface, and wherein a distance between the first gap surface and the second gap surface is adjustable; a plurality of stops, wherein each stop of the plurality of stops is positioned on either the first gap surface or the second gap surface, wherein the plurality of stops ensure a minimum distance of the adjustable gap, wherein a total length of the plurality of stops is less than 1% of a length of the first gap surface; and one or more vacuum ports in the first gap surface or the second gap surface.