Load Port Gas Curtain with Replaceable Plate to Prevent Adhesive Aging
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Solution Overview
Problem
Conventional gas curtain devices for load ports in semiconductor manufacturing suffer from adhesive aging, leading to debonding of the air-permeable member, which compromises the moisture shielding effect and requires replacement of the entire device.
Innovation Solution
A gas curtain device design that eliminates the use of adhesives by employing a holding unit with a positioning frame and fastener members to securely attach a gas-permeable plate to the gas curtain box, allowing for easy replacement of the plate without replacing the entire device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesive is used to connect the air-permeable member to the gas curtain box, then the initial sealing effect is good, but the adhesive ages over time causing debonding and gaps that compromise moisture shielding
Solution Approach 1:
The patent replaces the chemical bonding method (adhesive) with a mechanical fastening system consisting of a holding unit and fastener members. This mechanical connection eliminates the aging problem of adhesives while maintaining secure attachment of the gas-permeable plate to the gas curtain box, ensuring long-term reliability of the moisture shielding effect.
Solution Approach 2:
The patent changes the connection method from chemical (adhesive bonding) to mechanical (fastener members), fundamentally altering how the gas-permeable plate is attached. This parameter change in the connection mechanism resolves the issue of adhesive aging and debonding while maintaining effective sealing against moisture.
2Ease of manufacture
If adhesive is used to connect the air-permeable member, then assembly is simple, but the entire device must be replaced when adhesive ages or service life is reached
Solution Approach 1:
The patent divides the gas curtain device into separable components: the gas curtain box, the holding unit, and the gas-permeable plate. The gas-permeable plate can be independently removed and replaced by detaching the holding unit, eliminating the need to replace the entire device when maintenance is needed. This modular segmentation greatly improves maintenance convenience while keeping assembly simple through standardized fastening mechanisms.
Solution Approach 2:
The patent creates a dynamic, reversible connection system using fastener members that can be easily tightened and loosened. This allows the gas-permeable plate to be quickly detached for replacement or maintenance without permanent bonding, transforming the static adhesive connection into a dynamic mechanical fastening system that facilitates easy repair and component replacement.
3Reliability
If the gas-permeable plate is securely attached to prevent gaps, then moisture shielding is effective, but the device becomes difficult to maintain and replace components
Solution Approach 1:
The patent segments the device into modular components with the gas-permeable plate as a separate, replaceable element. The holding unit provides secure attachment through fastener members that ensure reliable sealing while allowing easy detachment for maintenance. This segmentation resolves the contradiction by making the device both securely sealed and easy to maintain through independent component replacement.
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
This design enhances maintenance convenience by preventing gaps due to adhesive aging and allowing for individual component replacement, thus maintaining the effectiveness of the gas curtain in shielding moisture.
Implementation Method 1
The gas-permeable plate is formed with a plurality of holes... The curtain-forming gas introduced into the inner space sequentially flows through the ventilation opening of the positioning frame and the holes of the gas-permeable plate
Data Source
AI summary
A gas curtain device for a load port includes a casing, a holding unit, a gas-permeable plate, and a fastener unit. The casing defines an inner space and including a flange that defines a gas outlet in spatial communication with the inner space. The holding unit is disposed in the casing, and defines a ventilation opening. The plate is positioned between the holding unit and the inner flange, and has holes. A curtain-forming gas is introduced into the inner space, and sequentially flows through the ventilation opening and the holes to be discharged from the gas outlet to form a gas curtain. The fastener unit connects removably the holding unit and the plate to the flange.