Vertical ALD Cartridge Threaded Motion for Particle Coating
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Solution Overview
Problem
Current atomic layer deposition (ALD) methods face challenges in efficiently processing particulate materials, such as powders or diamonds, due to limitations in uniformly coating their surfaces while maintaining bulk properties, particularly in ensuring uniform deposition and preventing agglomeration during the ALD process.
Innovation Solution
A vertical ALD cartridge with a threaded area extending from the vertical channel to the side wall, allowing particulate material to cycle through rotation and optional shaking, enabling top-to-bottom precursor vapor flow and preventing material escape, while using temporally separated precursor pulses for self-saturating surface reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional ALD methods are used to coat particulate materials, then material deposition can be achieved, but uniform coating and prevention of agglomeration are difficult to maintain
Solution Approach 1:
The system dynamically alternates between particle lifting phase (when first precursor is introduced) and settling phase (when second precursor is introduced), creating controlled motion that ensures uniform coating while preventing agglomeration through temporal separation of deposition steps
Solution Approach 2:
The ALD process uses periodic introduction of first and second precursors in alternating cycles, with each cycle consisting of lifting particles, depositing coating material, and settling particles, creating a rhythmic process that maintains coating uniformity and prevents agglomeration
2Manufacturing precision
If particulate material is processed in ALD, then surface coating can be applied, but maintaining bulk properties while achieving uniform deposition is challenging
Solution Approach 1:
The process applies coating material selectively to the particle surface through controlled precursor exposure, ensuring that only the outer layer is modified while the bulk interior remains unchanged, achieving local surface enhancement without altering bulk composition
Solution Approach 2:
The ALD process uses self-limiting surface reactions that deposit only a controlled monolayer or thin film on the particle surface, applying just enough coating to achieve uniform surface properties without excessive material that would alter bulk characteristics
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
This configuration ensures uniform coating of particulate materials, prevents agglomeration, and maintains the bulk properties of the particles, achieving high deposition efficiency and uniformity.
Implementation Method 1
a threaded area substantially extending from the vertical channel to a side wall of the cartridge, and downwards along the vertical channel to cause the particulate material to cycle during ALD processing
Implementation Method 2
arranging a precursor vapor flow through a vertical atomic layer deposition (ALD) cartridge along a top-to-bottom vertical channel
Implementation Method 3
Atomic Layer Deposition (ALD) and it is nowadays used instead of ALE. ALD is a special chemical deposition method based on the sequential introduction of at least two reactive precursor species to at least one substrate
Data Source
AI summary
An apparatus and method for arranging a precursor vapor flow through a vertical atomic layer deposition (ALD) cartridge along a top-to-bottom vertical channel in a central area of the cartridge, and for moving particulate material to be ALD processed in the cartridge upwards, upon rotation, by a threaded area substantially extending from the vertical channel to a side wall of the cartridge, and downwards along the vertical channel to cause the particulate material to cycle during ALD processing.