Dual Gate Single Actuator Wafer Transfer Mechanism
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Solution Overview
Problem
In electronic device manufacturing, the use of separate actuators for each gate in dual gate systems increases space requirements, grease usage, contamination, and maintenance needs, complicating wafer processing and transfer between chambers.
Innovation Solution
A dual gate system where a single actuator manipulates both gates, reducing the number of actuators needed by using a gate connector and actuator to seal and open slots on either side of a housing, allowing vertical and horizontal motion to facilitate wafer transfer between processing stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate actuators are used for each gate, then each gate can be independently controlled, but the space requirements increase and the system becomes more complex
Solution Approach 1:
The patent combines two separate actuators into a single actuator that controls both gates. The actuator includes a first output coupled to a first gate through a first gear and a second output coupled to a second gate through a second gear, allowing one actuator to independently control multiple gates through differential gear rotation.
Solution Approach 2:
The single actuator is designed with multiple outputs and gear mechanisms to perform multiple functions: it can rotate the first gear to open/close the first gate, rotate the second gear to open/close the second gate, and coordinate both gears to enable wafer transfer between chambers. This multi-functional design eliminates the need for separate actuators.
2Ease of operation
If separate actuators are used for each gate, then each gate can be independently manipulated, but grease usage increases
Solution Approach 1:
The patent merges two separate actuators into one unified actuator system. Since grease is typically used in actuator joints and gear mechanisms for lubrication, consolidating two actuators into one reduces the total number of joints and gear sets requiring lubrication, thereby reducing overall grease consumption.
3Ease of operation
If separate actuators are used for each gate, then each gate can be controlled independently, but contamination increases
Solution Approach 1:
The patent consolidates two actuators into one, reducing the number of mechanical components that can generate contamination through wear, particle generation, and grease leakage. Fewer moving parts mean fewer potential contamination sources in the wafer processing environment.
4Ease of operation
If separate actuators are used for each gate, then each gate can be manipulated independently, but maintenance requirements increase
Solution Approach 1:
The patent combines two actuators into a single actuator unit with shared mechanical components including gears, shafts, and housing. This consolidation reduces the total number of components requiring maintenance, simplifies repair procedures, and reduces maintenance frequency while still enabling independent control of both gates through the differential gear mechanism.
Data Source
AI summary
Disclosed is a wafer processing system, a dual gate system, and methods for operating these systems. The dual gate system may have a first gate, a second gate, a gate connector coupled to the first gate and to the second gate, and actuator coupled to the gate connector. The actuator is configured to seal the first gate against a first slot or open the first slot via vertical motion. The actuator is also configured to seal the second gate against a second slot or open the second slot via a combination of vertical motion and horizontal motion.