Inert Gas Exhaust Balancing for Substrate Processing Consistency
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Solution Overview
Problem
Variations in processing performance across multiple process chambers in substrate processing apparatuses lead to reduced productivity due to differences in component accuracy and assembly, affecting the yield of substrate processing.
Innovation Solution
A substrate processing apparatus with multiple process chambers, a gas supplier, and a common gas exhaust system that includes inert gas supply pipes and pressure detectors to regulate exhaust balance, ensuring consistent pressure across all chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a common exhaust system is used for multiple process chambers, then device complexity is reduced and productivity is improved, but variations in processing performance occur due to pressure differences between chambers
Solution Approach 1:
The patent applies local quality by providing individual inert gas supply pipes for each process chamber exhaust pipe, allowing localized pressure regulation. Each chamber's exhaust system receives tailored inert gas supplementation based on its specific pressure requirements, while still utilizing the common exhaust infrastructure. This resolves the contradiction by maintaining processing consistency (reliability) through localized adjustments without sacrificing the productivity benefits of a shared exhaust system.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting the pressure in each process chamber's exhaust line through controlled inert gas supply. The system monitors and modifies the gas flow parameters individually for each chamber, enabling precise pressure control that maintains consistent processing performance across all chambers while utilizing a common exhaust system for high throughput.
2Reliability
If pressure control is added to each exhaust pipe, then processing consistency is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the exhaust pressure control function into individual units for each process chamber. Each chamber has its own inert gas supply pipe and pressure detection mechanism, allowing independent control without affecting other chambers. This segmented approach improves processing consistency while keeping each control unit simple and modular, preventing overall system complexity from becoming unmanageable.
Solution Approach 2:
The patent uses inert gas as an intermediary substance to regulate pressure in each exhaust line. Rather than implementing complex mechanical pressure control devices in each chamber, the system introduces inert gas as a mediating element that passively balances pressure differences. This intermediary approach achieves reliable pressure control while avoiding the complexity of active control mechanisms in each exhaust branch.
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 maintains high productivity by regulating the exhaust balance between chambers, reducing pressure differences and preventing backflow of processing gases, thus enhancing the consistency and efficiency of substrate processing.
Implementation Method 1
a plurality of inert gas supply pipes respectively connected to the process chamber exhaust pipes and configured to supply an inert gas into the process chamber exhaust pipes
Implementation Method 2
supply an inert gas into the process chamber exhaust pipes
Implementation Method 3
at least one detector configured to detect states of pressures in the process chamber exhaust pipes
Data Source
AI summary
There is provided a technique that includes: a plurality of process chambers in which substrates are processed; a gas supplier configured to supply a gas to the process chambers; a plurality of process chamber exhaust pipes respectively connected to the plurality of process chambers; a common gas exhaust pipe disposed such that the respective process chamber exhaust pipes join together at downstream sides of the process chamber exhaust pipes; at least one detector configured to detect states of pressures in the process chamber exhaust pipes; and a plurality of inert gas supply pipes respectively connected to the process chamber exhaust pipes and configured to supply an inert gas into the process chamber exhaust pipes.