Substrate Transfer Shuttle Buffer for High-Throughput Processing
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Solution Overview
Problem
The existing substrate cleaning apparatuses face limitations in increasing throughput and reducing tact time, especially when processing large quantities of substrates, as the length of the main transfer robot's moving distance increases, leading to longer transfer times and reduced efficiency.
Innovation Solution
The apparatus includes a load port with a substrate transfer container, a processing part with two main carrying robots and stacked processing chambers, and a shuttle buffer system that allows independent movement between these parts, enabling efficient substrate transfer through elevation and rotation, and a shirking control mechanism to prevent collisions, thereby optimizing substrate processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of hands and buffer slots of the index robot and main transfer robot is increased to increase product amount, then throughput is improved, but device complexity increases
Solution Approach 1:
The system is divided into multiple processing chambers (first and second processing chambers) with dedicated main transfer robots for each, allowing parallel processing of substrates. The index robot manages multiple substrate transfer containers independently, enabling simultaneous loading and unloading operations that increase throughput without requiring additional hands on single robots.
Solution Approach 2:
The system transitions from a single-linear transfer path to a multi-dimensional arrangement with multiple processing chambers positioned around the index robot. Substrates can be processed in different chambers simultaneously, and the index robot can service multiple containers at different spatial locations, effectively utilizing three-dimensional space to increase capacity without proportionally increasing robot complexity.
2Adaptability or versatility
If the main transfer robot moves longer distances to service multiple processing chambers, then adaptability is improved, but tact time increases
Solution Approach 1:
The transfer system is segmented into multiple dedicated main transfer robots, each responsible for specific processing chambers. This segmentation allows each robot to service its assigned chambers with shorter, more efficient movement paths, reducing tact time while maintaining the ability to service multiple chambers through the coordinated operation of multiple robots.
Solution Approach 2:
The index robot acts as an intermediary that coordinates substrate transfers between multiple processing chambers and the substrate transfer container. It manages the flow of substrates to and from different chambers, optimizing the sequence and timing of transfers to minimize overall tact time while maintaining flexible service coverage across all chambers.
3Productivity
If two main transfer robots are disposed to increase product amount, then throughput is improved, but apparatus width increases
Solution Approach 1:
The system utilizes vertical stacking of processing chambers and three-dimensional positioning of the index robot to accommodate multiple main transfer robots without proportionally increasing apparatus width. The index robot operates in a central position with radial access to multiple chambers, efficiently using vertical and radial space rather than only horizontal expansion.
Solution Approach 2:
The index robot and multiple main transfer robots operate in a nested configuration where the index robot serves as a central hub and the main transfer robots service specific chambers positioned around it. This nested arrangement allows multiple robots to operate in a compact footprint by utilizing the central space efficiently and positioning chambers in a radial pattern rather than linear expansion.
Data Source
AI summary
An apparatus for processing a substrate includes a load port on that a substrate transfer container accommodating a substrate is laid, a processing part configured to process a substrate, and an index part including an index robot configured to carry a substrate between the substrate transfer container and the processing part, wherein the processing part includes a first transfer chamber configured to have a first main carrying robot carrying a substrate and disposed adjacent to the index part, a second transfer chamber configured to have a second main carrying robot carrying a substrate and disposed adjacent to the first transfer chamber, and a shuttle buffer part configured to move between the first transfer chamber and the second transfer chamber for transferring a substrate between the second main carrying robot and the index robot.