Multi-Vessel Vapor Precursor Delivery System for Continuous Deposition
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Solution Overview
Problem
Vapor phase precursor delivery systems in vapor phase deposition apparatuses face challenges due to low vapor pressure of solid precursors and inconsistent vapor production, leading to reduced productivity.
Innovation Solution
A vapor phase precursor delivery system comprising multiple vessels for storing and vaporizing precursors, with gas inlets and outlets, and outlet valves controlled by a processor and memory to maintain constant gas flow, ensuring consistent precursor delivery by switching between vessels and using refill arrangements to avoid downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single vessel is used to store and vaporize precursor, then the device complexity is low, but the productivity decreases due to downtime for refilling and inconsistent vapor production
Solution Approach 1:
The precursor delivery system is divided into multiple independent vessels (first vessel, second vessel, etc.), each capable of storing and vaporizing precursor. This segmentation allows one vessel to be refilled while others continue operation, eliminating downtime and maintaining consistent vapor supply, thus resolving the contradiction between productivity and device complexity.
Solution Approach 2:
Multiple vessels are prepared in advance with precursor material before deposition begins. The system switches between pre-filled vessels, ensuring continuous operation without interruption for refilling. This preliminary preparation resolves the productivity issue by eliminating idle time while the complexity increase is managed through standardized vessel designs.
2Stability of the object's composition
If a single vessel is used for precursor storage, then the device complexity is low, but the vapor production consistency deteriorates over time
Solution Approach 1:
The system uses multiple vessels instead of one large vessel, allowing each to maintain stable precursor levels independently. By switching between vessels before any single one depletes, the system maintains consistent vapor production throughout the deposition process, resolving the contradiction between vapor consistency and device complexity.
Solution Approach 2:
The multi-vessel configuration enables continuous vapor supply by ensuring that while one vessel is being used, others are ready to take over. This continuity eliminates interruptions and maintains stable vapor production, addressing the consistency issue while the added vessel management is handled through automated switching mechanisms.
3Productivity
If the precursor vaporization is maintained constantly, then the productivity increases, but the device complexity increases due to need for multiple vessels and switching mechanisms
Solution Approach 1:
The deposition system uses multiple precursor vessels that can be operated independently. This segmentation allows continuous vapor supply by switching between vessels as needed, maintaining high productivity while the complexity is managed through modular vessel designs and automated control systems.
Solution Approach 2:
The system includes automated mechanisms for monitoring precursor levels and switching between vessels without manual intervention. This self-service capability maintains constant vaporization for high productivity while reducing the operational complexity, as the switching logic is handled automatically based on sensor feedback.
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 system maintains a consistent vapor phase precursor delivery, enhancing the productivity of the deposition apparatus by maintaining constant precursor vaporization and allowing for continuous operation without shutting down for refills.
Implementation Method 1
a plurality of vessels constructed and arranged to store and vaporize a precursor
Data Source
AI summary
A vapor phase precursor delivery system for delivering a vapor phase precursor for depositing a layer in a vapor phase deposition apparatus is disclosed. The vapor phase precursor delivery system having: a plurality of vessels constructed and arranged to store and vaporize the same precursor; and a gas inlet and a gas outlet operably connected with one or more of the plurality of vessels. A vapor phase deposition apparatus, such as for example a vertical furnace may have such a vapor phase precursor delivery system for depositing a layer on a substrate.