Wafer Storage Exhaust Layout for Escaped Purge Gas Capture
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Solution Overview
Problem
Semiconductor wafers in storage devices experience contamination and moisture issues due to escaped purge gases through discontinuities, leading to airborne molecular contamination (AMC) and potential chemical reactions that can damage the wafers, compromising their integrity and posing health risks in manufacturing environments.
Innovation Solution
An exhaust device is strategically positioned relative to the wafer storage device to capture and direct a significant portion of the escaped gases away from the environment, improving air quality and reducing contamination, while allowing a controlled gas flow process to maintain wafer integrity and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If purge gas is used to maintain wafer storage chamber environment, then wafer integrity is improved, but airborne molecular contamination and moisture escape into the external environment causing health risks and equipment contamination
Solution Approach 1:
The exhaust device extracts and removes the harmful purge gases (containing moisture and contaminants) from the storage chamber through a dedicated exhaust port and conduit system, separating the beneficial internal environment maintenance from the harmful external release, thereby resolving the contradiction between maintaining wafer integrity and preventing AMC contamination
Solution Approach 2:
The exhaust device acts as an intermediary component between the sealed storage chamber and the external environment, providing a controlled pathway that allows necessary gas exchange while filtering and directing contaminants away from sensitive equipment and personnel, thus maintaining both wafer integrity and environmental safety
2Object-affected harmful factors
If purge gas flow rate is increased to improve air quality in storage chamber, then contamination is reduced, but more gas escapes through discontinuities increasing health risks and environmental contamination
Solution Approach 1:
The system monitors the purge gas flow and exhaust conditions, adjusting the exhaust device operation to maintain optimal pressure differentials that prevent excessive gas escape while ensuring adequate contamination removal, creating a balanced feedback loop that resolves the contradiction between internal air quality and external emission control
3Object-generated harmful factors
If exhaust device is added to remove escaped gases, then air quality and health safety are improved, but device complexity increases
Solution Approach 1:
The exhaust device is integrated with the existing purge system components, serving multiple functions including exhaust extraction, pressure differential maintenance, and contamination containment within a single unified system, thereby improving environmental safety without proportionally increasing overall system complexity
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 exhaust device effectively reduces AMC, enhances air quality, and minimizes health risks by efficiently removing contaminants, thereby improving the conditions within semiconductor manufacturing environments and maintaining wafer integrity.
Implementation Method 1
an exhaust device arranged relative the wafer storage device to conduct a measure of the escaped gases away from the environment
Data Source
AI summary
An apparatus is provided. The apparatus includes a wafer storage device having an inlet through which a gas flows into a wafer storage chamber of the wafer storage device. A first portion of the gas exits the wafer storage chamber of the wafer storage device through an outlet of the wafer storage device. A second portion of the gas exits the wafer storage chamber of the wafer storage device through one or more discontinuities of the wafer storage device to a space external to the wafer storage device. The apparatus includes an exhaust device arranged relative to the wafer storage device to conduct a measure of the second portion of the gas away from the space.