Modular Litho Cluster Transfer for Throughput Optimization
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Solution Overview
Problem
Current semiconductor process tool clusters face inefficiencies and throughput losses due to the need for time delays between processing steps for different semiconductor workpieces and maintenance-related backlogs, as each tool requires cleaning and reconfiguration, leading to reduced productivity and increased floor space requirements.
Innovation Solution
A modularized semiconductor process tool arrangement with transfer assemblies that allow selective transfer of workpieces between cluster tools, enabling independent control and flexible processing paths, shared chemical delivery systems, and defect scanning to optimize throughput and efficiency while minimizing floor space and maintenance disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single cluster tool processes different semiconductor workpieces, then tool utilization is achieved, but time delays and throughput losses occur due to cleaning and reconfiguration requirements
Solution Approach 1:
The system divides the processing into separate cluster tools, each dedicated to specific workpiece types or process steps. This segmentation eliminates the need for cleaning and reconfiguration between different workpiece types, as each cluster tool specializes in processing similar materials continuously.
Solution Approach 2:
The system creates multiple cluster tools that collectively handle diverse workpiece types through selective transfer mechanisms. Each cluster tool maintains universal capability within its specialization, allowing the overall system to process various semiconductor workpieces without requiring individual tools to be reconfigured.
2Adaptability or versatility
If cluster tools are reconfigured for different workpieces, then processing flexibility is achieved, but maintenance backlogs and productivity losses occur
Solution Approach 1:
The system implements dynamic workpiece routing through selective transfer mechanisms that direct different workpieces to appropriate cluster tools in real-time. This dynamic allocation provides processing flexibility without requiring physical reconfiguration of the tools themselves, maintaining continuous operation and high productivity.
Solution Approach 2:
The system uses multiple replicated cluster tools with similar capabilities, allowing workpieces to be routed to equivalent tools rather than requiring reconfiguration of a single tool. This copying approach maintains flexibility while eliminating maintenance backlogs associated with reconfiguration.
3Productivity
If multiple cluster tools are used to avoid time delays, then throughput is improved, but floor space requirements increase
Solution Approach 1:
The system merges multiple cluster tools into an integrated modular arrangement with shared infrastructure, including common chemical delivery systems, unified control mechanisms, and coordinated transfer assemblies. This merging reduces the total floor space required compared to completely separate tools while maintaining the throughput benefits of multiple processing units.
Solution Approach 2:
The system implements a nested modular structure where cluster tools are arranged in a compact configuration with shared peripheral systems. The tools are positioned to utilize common space for chemical storage, delivery piping, and control systems, effectively nesting support infrastructure within the overall tool arrangement to minimize floor space consumption.
Data Source
AI summary
The present disclosure relates to a lithographic tool arrangement for semiconductor workpiece processing. The lithographic tool arrangement groups lithographic tools into clusters, and selectively transfers a semiconductor workpiece between a plurality of lithographic tools of a first type in a first cluster to a plurality of lithographic tools of a second type in a second cluster. The selective transfer is achieved though a transfer assembly, which is coupled to a defect scan tool that identifies defects generated in the lithographic tool of the first type. The disclosed lithographic tool arrangement also utilizes shared structural elements such as a housing assembly, and shared functional elements such as gases and chemicals. The lithographic tool arrangement may consist of baking, coating, exposure, and development units configured to provide a modularization of these various components in order to optimize throughput and efficiency for a given lithographic fabrication process.