Gas-Tight Precursor Cabinet Layout for Independent Temperature Control
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Solution Overview
Problem
Existing precursor supply systems for atomic layer deposition face challenges in controlling the temperature of precursor containers and conduits due to ventilation gas cooling, which complicates temperature control and requires separate insulation and heating for each component, affecting the precision of temperature management.
Innovation Solution
A precursor supply cabinet with gas-tight chambers that are ventilated externally but isolated from ventilation gas flow, allowing for independent temperature control of each chamber and minimizing heat transfer between them, using separate gas-tight precursor supply chambers arranged with flow gaps for ventilation and thermal separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If precursor containers and conduits are placed in a ventilated space for safety, then ventilation effectiveness is improved, but temperature control precision deteriorates due to cooling from ventilation gas
Solution Approach 1:
The cabinet is divided into multiple independent gas-tight chambers, each capable of separate temperature control. This segmentation allows the ventilation space to be separated from the precursor container chambers, enabling independent temperature management for each chamber while maintaining overall ventilation effectiveness through the cabinet structure.
2Adaptability or versatility
If separate insulation and heating is applied to each precursor container and conduit, then individual temperature control capability is improved, but device complexity increases
Solution Approach 1:
Multiple precursor containers are placed within shared insulated chambers that have common heating elements. This merging approach allows multiple containers to benefit from collective insulation and heating infrastructure, reducing the overall complexity of the system while still enabling individual temperature control through separate heating zones or adjustable power distribution to shared heaters.
3Temperature
If heating elements are used to maintain elevated precursor temperatures, then precursor temperature stability is improved, but heat transfer between adjacent heated components causes temperature control difficulty
Solution Approach 1:
The cabinet is divided into multiple independent gas-tight chambers, each capable of separate temperature control. This segmentation allows the ventilation space to be separated from the precursor container chambers, enabling independent temperature management for each chamber while maintaining overall ventilation effectiveness through the cabinet structure.
Solution Approach 2:
Insulation materials are introduced as intermediary layers between adjacent heated chambers and components. These insulation barriers prevent direct heat transfer between neighboring heated elements, allowing each chamber to maintain its designated temperature independently without interference from adjacent heating zones.
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 precise temperature control of precursor containers without interference from ventilation gas, allowing for different temperatures in each chamber without affecting others, thus improving the efficiency and accuracy of precursor supply in atomic layer deposition processes.
Implementation Method 1
one or more gas tight precursor supply chambers, or two or more, for accommodating precursor containers. The one or more gas tight precursor supply chambers being arranged inside the inner cabinet space of the precursor supply cabinet such that the inner cabinet space of the precursor supply cabinet surrounding the one or more separate gas tight precursor supply chambers is ventilated.
Implementation Method 2
The precursors are further supplied to the reaction chamber in heated state. Therefore, the precursor containers and the precursor conduits are heated with heating elements for maintaining the precursors at the elevated temperature in the ventilated space and for preventing decrease of precursor temperature and condensation.
Implementation Method 3
the control of the temperatures of the precursors is difficult as the ventilation gas cools and affect the temperature of the precursor containers and precursor conduits.
Data Source
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AI summary
The invention relates to a precursor supply cabinet (2) for accommodating one or more precursor containers (80), the precursor supply cabinet (2) having 5 cabinet walls (3, 4, 6, 7, 8, 9) defining an inner cabinet space (1). The precursor supply cabinet (2) comprises a ventilation discharge connection (20, 21, 22) arranged to discharge ventilation gas from the inner cabinet space (1), one or more ventilation inlet connections (10, 11), two or more separate 10 gas tight precursor supply chambers (30) for accommodating precursor containers (80). The gas tight precursor supply chambers (30) are arranged inside the inner cabinet space (1) of the precursor supply cabinet (2) such that the inner cabinet space (1) of the precursor supply cabinet (2) surrounding the 15 separate gas tight precursor supply chambers (30) is ventilated.