Vertical ALD Reactor with Lateral Extensions for Throughput
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Solution Overview
Problem
There is a need for improved plasma-enhanced atomic layer deposition (PEALD) reactors that can efficiently process multiple substrates with precise control over energy exposure and precursor distribution, addressing limitations in existing technologies.
Innovation Solution
A substrate processing apparatus with a vertically oriented central processing volume and lateral extensions, featuring an actuator for reversible substrate movement between the central processing volume and lateral extensions, allowing for self-limiting surface reactions and precise control over energy exposure and precursor distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional ALD reactor design is used, then the reactor structure is simple, but the processing efficiency and throughput are limited
Solution Approach 1:
The reaction chamber is divided into multiple separate reaction zones (first reaction zone, second reaction zone, third reaction zone) that can independently process substrates. Each zone has its own precursor delivery system and plasma generation capability, allowing parallel processing of multiple substrates simultaneously, thereby increasing throughput without requiring a complete redesign of the basic ALD reactor architecture.
Solution Approach 2:
The patent introduces a vertical stacking arrangement of multiple reaction zones, transitioning from a conventional single-plane substrate processing to a three-dimensional configuration. This vertical integration allows multiple substrates to be processed in different zones at the same time, effectively increasing productivity by utilizing the vertical dimension rather than expanding horizontally.
2Productivity
If multiple substrates are processed simultaneously in a single reaction zone, then throughput increases, but uniformity of energy exposure and precursor distribution deteriorates
Solution Approach 1:
By separating the processing of multiple substrates into different reaction zones, each substrate receives dedicated and uniform exposure to precursors and plasma energy. The segmentation ensures that no substrate is subjected to competing effects from adjacent substrates, maintaining manufacturing precision while achieving high throughput through parallel processing across zones.
Solution Approach 2:
Each reaction zone is equipped with localized precursor delivery nozzles and plasma generation sources optimized for its specific substrate position. This local quality approach ensures that every substrate receives precisely controlled and uniform exposure to reactive species, regardless of its position in the vertical stack, thereby maintaining uniformity across all processed substrates.
3Productivity
If plasma is used to provide energy for surface reactions, then reaction rate increases, but control over energy exposure becomes less precise
Solution Approach 1:
The patent employs periodic pulsing of plasma generation and precursor delivery in each reaction zone, allowing precise temporal control over energy exposure. By controlling the duration, frequency, and timing of plasma pulses, the system achieves both high reaction rates and precise control over the total energy delivered to each substrate surface, resolving the contradiction between reaction rate and energy control precision.
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
Enables efficient processing of multiple substrates with improved uniformity and throughput, allowing for simultaneous exposure to different precursors and energies, enhancing the scalability and precision of substrate processing.
Implementation Method 1
an actuator configured to reversibly move at least one substrate between the lateral extension(s) and the central processing volume
Implementation Method 2
a central processing volume within a vertically oriented central processing portion of the reaction chamber, to expose at least one substrate to self-limiting surface reactions in the central processing volume
Implementation Method 3
In chemical deposition methods, such as atomic layer deposition (ALD), plasma can be used to provide required additional energy for surface reactions
Data Source
AI summary
A substrate processing apparatus, includes a reaction chamber, a central processing volume within a vertically oriented central processing portion of the reaction chamber, to expose at least one substrate to self-limiting surface reactions in the central processing volume, at least two lateral extensions in the reaction chamber laterally extending from the central processing portion, and an actuator configured to reversibly move at least one substrate between the lateral extension(s) and the central processing volume.