ALD Precursor Source Bypass Flow Restrictor
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Solution Overview
Problem
Existing precursor sources for atomic layer deposition reactors face challenges such as complex and expensive heating systems to prevent condensation, crust formation, and bulky designs that require time-consuming maintenance.
Innovation Solution
A modular precursor source with a detachable cartridge, embedded heating system, and a bypass line with a flow restrictor for controlling precursor vapor flow, along with a heat conductor to minimize thermal energy loss and prevent condensation, allowing for efficient and compact operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex heating systems are used to prevent condensation, then condensation prevention is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The precursor source utilizes the heat already present in the deposition reactor to prevent condensation of precursor vapor. The source is positioned to receive thermal energy from the reactor environment itself, eliminating the need for separate heating systems and making the system self-sufficient for condensation prevention
Solution Approach 2:
The heating function is extracted from a separate heating system and integrated into the reactor's thermal environment. The precursor source leverages the existing reactor heat for condensation prevention, separating the heating function from dedicated heating components
2Reliability
If complex heating systems are used to prevent crust formation, then crust formation prevention is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The precursor source uses the thermal energy already available in the deposition reactor to prevent crust formation on the precursor material surface. This self-service approach eliminates the need for additional heating components
Solution Approach 2:
The functions of condensation prevention and crust formation prevention are merged into a single thermal management approach using the reactor's existing heat, rather than requiring separate heating systems for each function
3Quantity of substance
If bulky precursor source designs are used, then precursor vapor generation capacity is improved, but maintenance time increases
Solution Approach 1:
The precursor source is designed as a detachable cartridge that can be easily removed and replaced. This segmentation allows the precursor supply to be quickly exchanged without maintaining the entire system, reducing maintenance time while preserving vapor generation capacity
Solution Approach 2:
The precursor source transitions from a fixed bulky design to a dynamic detachable cartridge system. The cartridge can be quickly inserted and removed, enabling rapid maintenance and precursor replacement without time-consuming disassembly of the entire precursor source
4Loss of energy
If thermal energy loss is not minimized, then heat efficiency is worsened, but device complexity increases with heat conductor components
Solution Approach 1:
The precursor source automatically receives heat from the reactor environment through its positioning and structural design. The heat conduction is achieved through the source's own structure and contact with heated reactor components, without requiring additional active heating elements
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 solution provides a simplified heating system, prevents crust formation, and reduces maintenance time, enabling efficient generation of precursor vapor for atomic layer deposition while maintaining a compact footprint.
Implementation Method 1
a heat conductor part around the in-feed line configured for decreasing thermal energy loss from the protrusion to the surroundings
Implementation Method 2
a bypass line between the pulsing valves for feeding inactive gas from a pulsing valve to another pulsing valve, the bypass line comprising a flow restrictor
Implementation Method 3
two pulsing valves embedded into the precursor source configured to control feeding of precursor vapor from the precursor source to a reaction chamber
Data Source
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AI summary
A precursor source for an atomic layer deposition, ALD, reactor. The precursor source comprises a heated thermally conductive source body providing a heated area, a first pulsing valve and a second pulsing valve attached to the heated thermally conductive source body, and a bypass conduit leading from the first pulsing valve to the second pulsing valve, the bypass conduit comprising a flow restrictor.