Multi-Substrate Carrier Handling for Parallel Chamber Processing
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Solution Overview
Problem
Existing substrate processing systems limit throughput by processing substrates individually and transferring them sequentially between chambers, especially when different process parameters are required for each substrate, leading to inefficiencies in device yield and cost of ownership.
Innovation Solution
A multi-substrate handling system with an alignment apparatus that positions substrates in predetermined orientations, a buffer chamber for conditioning, and a transfer assembly with robots to handle carriers between process chambers, allowing simultaneous processing of substrates with different parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If substrates are processed individually and transferred sequentially between chambers, then processing parameters can be optimized for each substrate, but throughput is limited
Solution Approach 1:
The system divides substrates into multiple groups or batches that can be processed simultaneously in parallel chambers. Each chamber handles a subset of substrates with specific process parameters, allowing multiple processing operations to occur concurrently rather than sequentially, thereby increasing overall throughput while maintaining individual substrate optimization.
Solution Approach 2:
Multiple substrate processing operations are merged into a single integrated system where multiple chambers operate simultaneously. The transfer mechanism combines substrate movement between chambers with batch processing, allowing the system to handle multiple substrates through the entire processing sequence in parallel, thus improving productivity without proportionally increasing system complexity.
2Manufacturing precision
If substrates are transferred one at a time between chambers, then processing precision can be maintained, but processing time increases
Solution Approach 1:
Substrates are prepared and staged in advance in input chambers or on transfer mechanisms before actual processing begins. This preliminary positioning and grouping of substrates allows the system to maintain precise control over each substrate's processing sequence while reducing idle time between processing steps, as substrates are ready for immediate transfer when processing slots become available.
Solution Approach 2:
The system maintains continuous substrate flow through overlapping processing cycles where while one batch is being processed in the chambers, another batch is being transferred or prepared. This continuous operation eliminates idle time between processing steps while maintaining the precision required for each individual substrate through controlled transfer mechanisms and staged processing sequences.
3Reliability
If different process parameters are used for different substrates, then device yield can be optimized, but system throughput decreases
Solution Approach 1:
Different process parameters are applied to different substrates or substrate groups based on their specific requirements. Each chamber or processing zone is configured with localized process conditions (temperature, pressure, treatment type) matched to the specific substrate batch being processed, allowing optimal device yield for each substrate type while maintaining high overall throughput through parallel processing of multiple customized batches.
Data Source
AI summary
The present disclosure provides a multi-substrate handling system having an alignment apparatus capable of positioning each of a set of substrates in predetermined orientations for transfer. A buffer chamber is configured to receive and condition the set of substrates which are disposed on a substrate carrier. A first transfer assembly is configured to transfer the set of substrates to and from the buffer chamber and is capable of transferring each of the set of substrates from the alignment apparatus to the carrier in the buffer chamber. The carrier includes a plurality of modules capable of securing the set of substrates. The system includes a second transfer assembly having at least two robots configured to transfer the carrier of the set of substrates between the buffer chamber and a process chamber. The process chamber is capable of processing the set of substrates using different process parameters for each substrate.