PLD Chamber Window Contamination Prevention via Rotating Film
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Solution Overview
Problem
Conventional pulsed laser deposition (PLD) systems face challenges in maintaining the cleanliness of the chamber window over extended periods, leading to reduced deposition efficiency and film uniformity, necessitating frequent maintenance and replacement of the chamber window.
Innovation Solution
A device is introduced that includes a film part and a film transfer device to prevent contamination of the chamber window. The film part is positioned within a predetermined distance from the chamber window, and the film transfer device transfers the film part to ensure the pulsed laser passes through uncontaminated areas, thereby maintaining the window's cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the chamber window is used for extended periods in PLD, then productivity increases, but the chamber window becomes contaminated by deposited material, reducing laser energy transmission and deposition efficiency
Solution Approach 1:
The patent introduces a protective film that is segmented into multiple sections, allowing different portions of the film to be positioned in front of the chamber window at different times. This segmentation enables the system to maintain a clean protective barrier over extended periods by rotating or translating between multiple film sections, thereby resolving the contradiction between continuous operation and window cleanliness.
Solution Approach 2:
The protective film acts as an intermediary element between the deposition environment and the chamber window. It absorbs the harmful deposited material that would otherwise contaminate the window, while still allowing laser energy to pass through. This intermediary protects the window during extended operation, and the film can be replaced or repositioned when contaminated, resolving the reliability-productivity contradiction.
2Reliability
If maintenance is performed by wiping or replacing the chamber window, then cleanliness is restored, but significant time loss and economic cost occur
Solution Approach 1:
The patent employs a disposable or easily replaceable protective film that can be quickly exchanged when contaminated. Instead of performing time-consuming maintenance on the expensive chamber window, the system uses inexpensive film sections that can be rapidly replaced. This resolves the contradiction by providing an alternative maintenance approach that minimizes time loss while restoring cleanliness.
Solution Approach 2:
The system incorporates dynamic mechanisms to translate or rotate the protective film, allowing it to be quickly repositioned or replaced without manual intervention in the vacuum chamber. This dynamic capability reduces maintenance time significantly compared to static window cleaning or replacement methods, resolving the contradiction between maintaining cleanliness and minimizing time loss.
3Productivity
If deposition material is deposited on the chamber window, then the process continues, but laser energy is reduced and film uniformity deteriorates
Solution Approach 1:
The protective film serves as an intermediary that absorbs deposition material before it can reach the chamber window. This prevents the window contamination that would cause laser energy reduction and film uniformity deterioration. The film can be replaced when saturated, allowing continuous high-quality deposition without compromising manufacturing precision, thus resolving the contradiction between productivity and film uniformity.
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 solution allows for continuous operation of the PLD process for an extended period without the need for frequent maintenance or replacement of the chamber window, ensuring consistent deposition efficiency and film quality.
Implementation Method 1
a film part disposed within a predetermined distance from the chamber window of a vacuum chamber... the contamination of the chamber window is prevented based on the film part
Implementation Method 2
the pulsed laser is controlled to pass through an uncontaminated portion of the film part
Implementation Method 3
pulsed laser deposition (PLD), which irradiates a thin film with pulsed laser to deposit the generated plume on a substrate
Implementation Method 4
a film transfer device configured to transfer the film part... the film part is transferred based on the film transfer device
Data Source
AI summary
Embodiments of the present invention relate to a device for preventing contamination of a chamber window, which enables a PLD process to be performed for a long period of time without replacing the chamber window, by improving an existing technology, in which a deposition material is deposited on the chamber window, and thus, a process has to be stopped, and the maintenance has to be performed, in a pulsed laser deposition (PLD), which irradiates a thin film with pulsed laser to deposit the generated plume on a substrate.