ALD Precursor Gas Recycling System
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Solution Overview
Problem
Conventional atomic layer deposition (ALD) processes waste a significant amount of precursor materials as they are evacuated and discarded, leading to increased costs and inefficiency.
Innovation Solution
A system and method that incorporates a gas circulation system to recycle precursor gases exiting the deposition chamber, using a gas composition detection system to monitor and control the circulation of these gases back into the chamber, thereby reducing waste and optimizing precursor usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If precursor gases are evacuated and discarded after deposition, then the deposition chamber can be prepared for the next cycle, but a significant amount of precursor materials is wasted
Solution Approach 1:
The patent implements a gas circulation system that captures precursor gases evacuated from the deposition chamber and recycles them back into the chamber. This recovery process prevents precursor material waste while maintaining deposition cycle efficiency, directly resolving the technical contradiction between material loss and productivity
Solution Approach 2:
The circulation system maintains continuous flow of precursor gases through the deposition chamber by recycling evacuated gases. This continuous action ensures that precursor materials remain in the system and are repeatedly utilized, eliminating waste while sustaining high deposition productivity
2Loss of substance
If a gas circulation system is implemented to recycle precursor gases, then precursor material waste is reduced, but the system complexity increases
Solution Approach 1:
The gas circulation system performs multiple functions: it recycles precursor gases, controls gas composition through detection systems, and prepares the chamber for subsequent cycles. This multi-functionality reduces the need for separate systems, thereby limiting the increase in overall device complexity while achieving significant waste reduction
3Quantity of substance
If gas composition detection and control are implemented, then precursor usage is optimized, but the measurement and control complexity increases
Solution Approach 1:
The system employs gas composition detection that provides real-time feedback to the circulation control. This feedback mechanism enables automatic adjustment of precursor gas recycling to optimize usage efficiency, while the automated control reduces the operational complexity of monitoring and measuring gas composition
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 effectively reduces precursor waste by recycling gases back into the deposition chamber, lowering production costs and improving the efficiency of the ALD process.
Implementation Method 1
a circulation line configured to transport the gas exiting the deposition chamber to the input line. The circulation line causes the gas exiting the deposition chamber to be transported back into the deposition chamber
Implementation Method 2
a gas composition detection system configured to produce an output signal indicating a composition of a gas exiting the deposition chamber through the output line
Implementation Method 3
a controller coupled to the gas supply. The controller controls the providing of the one or more precursor materials by the gas supply based on the output signal of the gas composition detection system
Implementation Method 4
a filter coupled to the gas circulation system, where the filter reduces contaminants in the gas being transported back into the deposition chamber
Data Source
AI summary
Systems and methods for supplying a precursor material for an atomic layer deposition (ALD) process are provided. A gas supply provides one or more precursor materials to a deposition chamber. The deposition chamber receives the one or more precursor materials via an input line. A gas circulation system is coupled to an output line of the deposition chamber. The gas circulation system includes a gas composition detection system configured to produce an output signal indicating a composition of a gas exiting the deposition chamber through the output line. The gas circulation system also includes a circulation line configured to transport the gas exiting the deposition chamber to the input line. A controller is coupled to the gas supply. The controller controls the providing of the one or more precursor materials by the gas supply based on the output signal of the gas composition detection system.