Substrate Transfer Interface for High-Throughput Lot Formation
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Solution Overview
Problem
Current substrate processing systems face inefficiencies in handling and processing large numbers of substrates due to limitations in transfer mechanisms and processing configurations, leading to stagnation and reduced throughput.
Innovation Solution
A substrate processing system is designed with a loading/unloading part, batch-type processing part, single-substrate-type processing part, and interface part, featuring transfer robots and processing baths arranged to facilitate efficient transfer and processing of substrates in batches and individually, allowing for the formation and release of lots with varying pitches to optimize substrate handling and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If substrates are processed one by one in a single-substrate-type processing part, then handling precision and pattern integrity are improved, but throughput and productivity deteriorate
Solution Approach 1:
The processing system is divided into multiple single-substrate-type processing parts (first, second, third processing parts) that operate in parallel. Each processing part handles one substrate at a time with high precision, while the collective operation of multiple processing parts achieves high throughput. The interface part segments the transfer process to coordinate between batch-type and single-substrate-type processing.
Solution Approach 2:
Multiple single-substrate-type processing parts are merged into a coordinated system where they process substrates simultaneously. The batch-type processing part processes multiple substrates collectively, and the interface part merges the outputs from multiple single-substrate processing parts into a unified lot, combining the benefits of both processing modes.
2Productivity
If batch-type processing is used to increase throughput, then productivity is improved, but handling precision and pattern integrity deteriorate
Solution Approach 1:
The batch processing is segmented into multiple stages: collective processing in the batch-type processing part, followed by individual handling in separate single-substrate-type processing parts. This segmentation allows the system to benefit from batch processing efficiency while maintaining precision through subsequent individual processing steps.
Solution Approach 2:
The interface part acts as an intermediary between the batch-type processing part and single-substrate-type processing parts. It receives processed substrates from batch processing, organizes them into lots, and transfers them to individual processing parts, ensuring that precision requirements are met after batch processing.
3Device complexity
If transfer mechanisms are simplified to reduce device complexity, then ease of operation is improved, but substrate handling capability and throughput deteriorate
Solution Approach 1:
The interface part serves multiple functions: it forms lots from individually processed substrates, transfers substrates between different processing parts, and coordinates the operation between batch-type and single-substrate-type processing. This multi-functionality reduces the need for separate dedicated transfer mechanisms for each function.
Solution Approach 2:
The transfer robots in the interface part autonomously coordinate their movements and operations to transfer substrates between processing parts and form lots. The system self-regulates the transfer process without requiring complex external control mechanisms, simplifying the overall device complexity.
4Productivity
If multiple processing parts are added to increase throughput, then productivity is improved, but device complexity increases
Solution Approach 1:
Each processing part (batch-type and single-substrate-type) is designed with universal interfaces that can handle multiple operations. The interface part can form lots from different processing parts and transfer to various destinations, reducing the need for specialized dedicated components for each processing path.
Solution Approach 2:
The system is segmented into modular processing parts that can be independently configured and operated. Each module (batch-type processing part, single-substrate-type processing parts, interface part) is a self-contained unit that can be added or removed based on throughput requirements, allowing scalable complexity management.
Data Source
AI summary
A substrate processing system includes: a loading/unloading part into/from which a cassette that accommodates a plurality of substrates is loaded/unloaded; a batch-type processing part configured to collectively process a lot including the plurality of substrates; a single-substrate-type processing part configured to the plurality of substrates of the lot one by one; and an interface part configured to deliver the plurality of substrates between the batch-type processing part and the single-substrate-type processing part, wherein the loading/unloading part, the single-substrate-type processing part, the interface part, and the batch-type processing part are arranged in this order, and wherein the interface part comprises a lot formation part configured to form the lot, and a transfer part configured to transfer the plurality of substrates from the single-substrate-type processing part to the lot formation part, and configured to transfer the plurality of substrates from the batch-type processing part to the single-substrate-type processing part.