Vaporization Container Pressure Control for Complete Precursor Vaporization
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Solution Overview
Problem
Incomplete vaporization of liquid precursors occurs due to pressure fluctuations when replenishing them in vaporization containers, leading to inefficiencies in substrate processing.
Innovation Solution
Regulate pressure in the vaporization container after liquid precursor supply, maintain the vaporized state, and then supply the vaporized gas to the process container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If liquid precursor is injected into the vaporization container to replenish it, then the liquid precursor quantity is restored, but pressure fluctuations occur causing incomplete vaporization
Solution Approach 1:
The system performs preliminary actions by detecting the liquid precursor quantity before it becomes critically low and initiates replenishment at an optimal time. The control unit schedules the liquid precursor supply to occur during a predetermined period that avoids critical pressure fluctuations, ensuring vaporization completeness is maintained while restoring precursor quantity.
Solution Approach 2:
The system employs feedback mechanisms where the control unit continuously monitors both the liquid precursor quantity and pressure conditions in the vaporization container. Based on this feedback, the control unit dynamically adjusts the timing of liquid precursor supply to occur during periods when pressure fluctuations are minimized, thereby preventing incomplete vaporization while maintaining adequate precursor levels.
2Reliability
If liquid precursor supply is delayed to avoid pressure fluctuations, then vaporization completeness is maintained, but the liquid precursor quantity decreases
Solution Approach 1:
The system performs preliminary detection of liquid precursor quantity and proactively schedules replenishment during optimal pressure conditions. By anticipating both the quantity depletion and pressure fluctuation patterns, the system initiates supply at the right moment before quantity becomes critical but during periods favorable for complete vaporization.
Solution Approach 2:
Continuous monitoring of both precursor quantity and pressure conditions enables the control unit to make real-time decisions. When quantity drops below a threshold but pressure conditions are favorable, the system immediately initiates replenishment, balancing the need to maintain quantity while ensuring vaporization completeness through feedback-driven timing optimization.
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
Prevents incomplete vaporization, ensuring consistent and efficient vaporization of liquid precursors for substrate processing.
Implementation Method 1
vaporizing the liquid precursor stored in the vaporization container
Data Source
AI summary
A technique includes: (a) supplying a liquid precursor into a vaporization container; (b) regulating a pressure in the vaporization container to reduce the pressure at a time point when (a) is completed or after a first predetermined time has elapsed since the time point; (c) after (b), maintaining a state in which the regulation of the pressure in the vaporization container is stopped while vaporizing the liquid precursor; and (d) after (c), supplying a vaporized gas generated by vaporizing the liquid precursor in the vaporization container into a process container in which a substrate is processed.