Cassette Lid Suspension Spring for Reliable Wall Sealing
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Solution Overview
Problem
Existing cassette lid opening devices for semiconductor substrate processing apparatuses require high precision and robustness in their transport mechanisms to withstand high forces, which increases complexity and cost.
Innovation Solution
The cassette lid opening device incorporates a housing, a door assembly, a transport mechanism, and at least one suspension with a suspension spring assembly, allowing the door assembly to move perpendicular to the wall, reducing the need for high precision and robustness in the transport mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transport mechanism is designed with high precision and robustness to withstand high forces during gas sealing, then the reliability of the door assembly positioning is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The door assembly is separated into two independent movement functions: lateral transport (handled by the transport mechanism) and perpendicular movement (handled by the suspension spring assembly). This segmentation allows each mechanism to be optimized for its specific function, reducing the overall complexity requirements of the transport mechanism while maintaining positioning reliability.
Solution Approach 2:
The suspension spring assembly acts as an intermediary mechanism between the transport mechanism and the door plate. It absorbs the high forces generated during gas sealing and allows the door plate to move perpendicular to the wall independently, thereby protecting the transport mechanism from excessive force requirements and reducing its complexity.
2Strength
If the transport mechanism is made more robust to handle high forces, then the strength and durability are improved, but the manufacturing cost increases
Solution Approach 1:
The force-bearing function is segmented from the transport function. The suspension spring assembly specifically handles the high forces during gas sealing, while the transport mechanism only needs to provide lateral movement capability with lower strength requirements, thereby reducing manufacturing cost.
Solution Approach 2:
The suspension spring assembly serves as a force-absorbing intermediary that protects the transport mechanism from high forces. This allows the transport mechanism to be manufactured with lower strength specifications, reducing production costs while maintaining overall system durability.
3Device complexity
If the door assembly is constrained to move only laterally, then the transport mechanism design is simplified, but the ability to maintain proper engagement with the wall during sealing is compromised
Solution Approach 1:
The door assembly's movement is segmented into two independent directions: lateral movement (simplified transport mechanism) and perpendicular movement (enabled by suspension spring assembly). This segmentation allows the transport mechanism to remain simple while the suspension mechanism ensures reliable wall engagement during sealing.
Solution Approach 2:
The door assembly is given dynamic freedom to move perpendicular to the wall through the suspension spring assembly, while the transport mechanism maintains a simple lateral transport function. This dynamic design ensures proper wall engagement during sealing without complicating the transport mechanism.
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 ensures proper engagement of the door plates with the wall while allowing the transport mechanism to maintain lower precision and robustness standards, thereby simplifying and cost-reducing the device.
Implementation Method 1
The at least one suspension may comprise a suspension spring assembly which allows movement of the at least one door plate in a direction perpendicular to the at least one wall
Data Source
AI summary
Cassette lid opening device for a semiconductor substrate processing apparatus comprising a housing, a door assembly, a transport mechanism, and at least one suspension. The housing has at least one wall with an associated wall opening. The door assembly comprises at least one door plate configured for substantially closing off the associated wall opening of the at least one wall. The transport mechanism includes a carriage which is connected to the door assembly and configured to transport the door assembly parallel to the at least one wall. The at least one suspension is arranged between the at least one door plate and the transport mechanism. The at least one suspension comprises a suspension spring assembly which allows movement of the at least one door plate in a direction perpendicular to the at least one wall.