Multi-Zone Reactor Layout for Fast ALD/ALE Gas Separation
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Solution Overview
Problem
Existing gas-phase reactors for processes like ALD and ALE require multiple dedicated reaction chambers, leading to high capital and operating costs, space inefficiency, complex precursor delivery schemes, and reliability issues due to horizontal transport systems and large processing volumes, which result in unwanted mixing and slow substrate processing.
Innovation Solution
A multi-zone gas-phase reactor with vertically stacked reaction zones, allowing for independent movement of top and bottom plates, dynamic volume adjustment, and inert gas valving to isolate processing regions, enabling efficient and flexible processing without air or vacuum breaks, reducing space requirements and improving throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple dedicated reaction chambers are used for different gas-phase processes, then cross contamination of reactants is prevented, but capital costs and operating costs increase significantly
Solution Approach 1:
The reaction chamber is segmented into multiple processing zones (first processing zone, second processing zone, third processing zone) that can be independently controlled. Each zone has independent gas delivery systems, allowing different reactants to be processed simultaneously without cross contamination, eliminating the need for multiple dedicated chambers.
Solution Approach 2:
The patent transitions from a horizontal arrangement of multiple chambers to a vertical stacking of processing zones within a single chamber. The zones are arranged vertically with independent gas inlet and outlet systems, enabling simultaneous independent processing in what was traditionally a single-plane configuration.
2Adaptability or versatility
If horizontal transport systems are used for substrate movement between processing regions, then substrate can be processed in multiple regions, but floor space requirements increase significantly
Solution Approach 1:
The patent arranges processing zones vertically stacked one above another within a single reaction chamber, eliminating the need for horizontal substrate transport between separate chambers. The substrate remains in a fixed position while gas flows through different vertical zones, enabling multi-region processing in a compact vertical footprint.
3Reliability
If large processing region volumes are used in horizontal transport systems, then adequate gas separation is maintained, but purge gas requirements and purge times increase
Solution Approach 1:
The reaction chamber is divided into multiple independently controlled processing zones with separate gas inlet and outlet systems. Each zone can be purged independently and quickly, eliminating the need to purge large volumes required by horizontal transport systems. The segmented design allows rapid gas exchange without compromising separation between different reactant streams.
4Reliability
If multiple precursors are introduced sequentially with purge steps, then unwanted mixing of precursors is prevented, but processing time increases
Solution Approach 1:
Different precursors are delivered to different vertically stacked processing zones simultaneously through independent gas delivery systems. The zones are separated by gas-permeable barriers that allow controlled gas exchange while preventing unwanted mixing. This eliminates sequential purge steps while maintaining precursor separation, significantly improving processing throughput.
Solution Approach 2:
Gas-permeable barriers are positioned between processing zones to act as intermediaries that allow controlled gas exchange while preventing direct mixing of precursors. These barriers enable simultaneous precursor introduction without cross contamination, eliminating the need for time-consuming purge steps between precursor deliveries.
5Reliability
If inert gas valving is used to isolate processing regions, then unwanted mixing is minimized, but system complexity increases
Solution Approach 1:
Gas-permeable barriers serve as passive intermediaries that automatically isolate processing regions without requiring active inert gas valving systems. These barriers allow controlled gas permeation while preventing direct mixing between zones, achieving region isolation through their physical structure rather than complex active control systems.
Data Source
AI summary
Multi-zone reactors, systems including a multi-zone reactor, and methods of using the systems and reactors are disclosed. Exemplary multi-zone reactors include a movable susceptor assembly and a moveable plate. The movable susceptor assembly and movable plate can move vertically between reaction zones of a reactor to expose a substrate to multiple processes or reactants.