Substrate Buffer Layout for Higher-Throughput Wafer Transport
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Solution Overview
Problem
The existing substrate treating systems experience a reduction in throughput due to the need for substrates to pass through multiple treatment blocks, which increases the burden on the indexer block and reduces overall efficiency.
Innovation Solution
A substrate treating system is configured with an indexer block, a first treating device, and a second treating device, where the substrate buffer is positioned between them, allowing direct transportation from the second treating device to the indexer block without passing through the first treating device, and from the first treating device to the second treating device through the buffer, thereby reducing the burden on the indexer block and enhancing throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrates are transported through multiple treatment blocks in sequence, then comprehensive treatment is achieved, but throughput is reduced and indexer block burden increases
Solution Approach 1:
The system segments the transportation function by introducing a substrate buffer that operates independently from the indexer block. The substrate buffer handles substrate transfer between treatment blocks, while the indexer block focuses on carrier management. This segmentation allows parallel operations and reduces the indexer block's burden, thereby improving throughput without compromising treatment comprehensiveness.
Solution Approach 2:
The substrate buffer acts as an intermediary between the indexer block and treatment blocks. It receives substrates from the indexer block and distributes them to various treatment blocks as needed. This intermediary mechanism enables flexible substrate routing, allowing substrates to be processed by multiple treatment blocks without requiring the indexer block to coordinate each transfer, thus improving throughput and reducing indexer block burden.
2Productivity
If the indexer block handles all substrate transfers between treatment blocks, then centralized control is maintained, but the indexer block becomes a bottleneck reducing overall efficiency
Solution Approach 1:
The system divides the substrate transfer operation into two parts: the indexer block handles carrier-level substrate extraction and placement, while the substrate buffer handles individual substrate transfer between treatment blocks. This segmentation reduces the indexer block's operation burden by eliminating its role in inter-block substrate transfers, thereby improving system efficiency without sacrificing centralized control.
Solution Approach 2:
The substrate buffer serves as an intermediary that assumes the burden of substrate transfer operations between treatment blocks. It receives substrates from the indexer block and autonomously manages their distribution to various treatment blocks. This intermediary mechanism maintains centralized control through coordinated operation while significantly reducing the indexer block's operational burden, thus improving system efficiency.
3Productivity
If substrates must pass through the first treating device to reach the indexer block from the second treating device, then transportation path is simplified, but throughput is reduced due to unnecessary processing steps
Solution Approach 1:
The substrate buffer acts as an intermediary that enables direct substrate transfer from the second treatment block to the indexer block, bypassing the first treatment block. Substrates completed in the second treatment block are deposited into the substrate buffer, which then transfers them directly to the indexer block. This intermediary mechanism creates a shortcut in the transportation path, eliminating unnecessary processing steps and improving throughput, while the physical layout maintains manageable path lengths.
Data Source
AI summary
Disclosed is a substrate treating system and a substrate transporting method. For instance, it is assumed that an indexer block, a first treating block, and a second treating block are arranged in this order. In this case, for transporting a substrate treated in the second treating block to an indexer block, the substrate is necessarily sent through the first treating block without any treatment in the first treating block. However, the first treating block and the second treating block are both connected to the indexer block. Therefore, transportation of the substrate is performable directly from the second treating block to the indexer block without through the first treating block. Therefore, reduction in throughput is suppressible.