Direct Carrying Mechanism for Coating and Developing System Maintenance
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Solution Overview
Problem
The existing coating and developing systems for semiconductor wafers face challenges in maintaining the exposure system's alignment due to environmental changes, leading to reduced throughput and extended startup times for semiconductor device fabricating lines, as they require frequent inspection and adjustment, which cannot be performed during maintenance of the coating or developing blocks.
Innovation Solution
A coating and developing system with a direct carrying mechanism that allows for simultaneous maintenance of the exposure system, enabling the system to carry substrates directly between the carrier handling block and the interface block, allowing for timed inspection and adjustment of the exposure system, even during maintenance of the coating and developing blocks, thus reducing downtime and enabling immediate resumption of processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the coating block or developing block is used to carry the test wafer to the exposure system for inspection and adjustment, then the exposure system can be inspected and adjusted, but the inspection and adjustment cannot be performed if the coating block or developing block is under maintenance work or out of order
Solution Approach 1:
The patent introduces a dedicated carrying system that is segmented from the coating and developing blocks. This independent carrying system allows the test wafer to be transported to the exposure system without depending on the operational status of the coating or developing blocks, thereby enabling inspection and adjustment of the exposure system even when those blocks are under maintenance.
Solution Approach 2:
The patent introduces a new intermediary component - a dedicated carrying system with its own carrier handling block and carrying mechanism. This intermediary serves as a mediator between the test wafer and the exposure system, allowing the transfer to occur independently of the coating and developing blocks, thus resolving the dependency issue.
2Manufacturing precision
If the exposure system is inspected and adjusted frequently to maintain quality, then the resist pattern quality is maintained, but the system startup time is extended due to sequential maintenance requirements
Solution Approach 1:
The patent enables preliminary inspection and adjustment of the exposure system by allowing the carrying system to be prepared and tested independently. The dedicated carrying system can be configured and tested in advance without waiting for the coating or developing blocks to be ready, allowing the exposure system to be inspected and adjusted before full system integration, thus reducing overall startup time.
3Area of stationary object
If the coating block and developing block are superposed to save space, then the system footprint is reduced, but the carrying path for test wafers becomes dependent on these blocks
Solution Approach 1:
The patent resolves the spatial conflict by introducing a vertical or alternative dimensional path for the dedicated carrying system. The new carrying system operates in a different spatial dimension or plane, allowing it to bypass the superposed coating and developing blocks while still achieving space-efficient system layout. This enables independent carrying operations without increasing the overall system footprint.
Data Source
AI summary
The coating and developing system carries a substrate delivered to a carrier handling block to a processing block to form a film on the substrate by a coating block included in the processing block, carries the substrate through an interface block to the exposure system, processes the substrate having the exposed film by a developing process by a developing block included in the processing block and returns the thus processed substrate to the carrier handling block. A direct carrying means is superposed on the coating block and the developing block to carry a substrate having a surface coated with a film from the carrier handling block directly to the interface block. A test substrate can be carried to the exposure system to inspect the condition of the exposure system even in a state where the coating block and the developing block are under maintenance work.