Modular Coating and Developing Apparatus for Semiconductor Manufacturing
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Solution Overview
Problem
The existing coating and developing apparatuses for semiconductor manufacturing face efficiency issues due to the need to stop operations when an abnormality occurs in one processing module or unit block, leading to reduced throughput and increased footprint.
Innovation Solution
A coating and developing apparatus with a carrier block, processing block, and interface block configuration that allows for vertical stacking of processing units and lateral adjacency of later-stage units, enabling continuous operation by transferring substrates between units using multiple transport mechanisms, thereby minimizing downtime during module failures or maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple diverse processing modules are provided in a processing block to meet demands for finer resist patterns and increased yield, then manufacturing precision and productivity are improved, but device complexity and footprint increase
Solution Approach 1:
The processing block is divided into multiple independent unit blocks, each capable of performing different processing functions (resist coating, developing, cleaning, etc.). This segmentation allows the system to handle diverse processing requirements while maintaining modularity, where each unit block can be independently controlled and maintained without affecting the entire system.
Solution Approach 2:
Each unit block is designed with universal functionality to handle multiple processing tasks. The unit blocks can be configured to perform different operations (positive resist coating, negative resist coating, developing, cleaning) based on processing requirements, reducing the need for entirely separate dedicated modules for each function.
2Area of stationary object
If unit blocks are vertically stacked to reduce footprint, then area of stationary object is reduced, but reliability decreases due to sequential transport requirement
Solution Approach 1:
The system maintains continuous wafer processing by implementing parallel transport paths. When one unit block is stopped for maintenance or abnormality handling, the parallel path allows wafers to continue flowing through other unit blocks, ensuring uninterrupted production and maintaining system reliability while keeping the vertically compact structure.
Solution Approach 2:
The transport mechanism is designed to be dynamic and adaptable, capable of routing wafers through different paths based on real-time system status. The control system dynamically adjusts wafer flow to bypass malfunctioning unit blocks while utilizing operational ones, ensuring continuous processing despite individual unit block failures.
3Device complexity
If unit blocks are arranged sequentially to simplify transport mechanism, then device complexity is reduced, but productivity decreases due to operation stoppage during maintenance
Solution Approach 1:
The processing block is divided into multiple independent unit blocks that can operate in parallel. This segmentation creates multiple processing paths, allowing the system to maintain throughput during maintenance by routing wafers through operational unit blocks while bypassing those under maintenance, thus preserving productivity without significantly increasing transport complexity.
Solution Approach 2:
The system can dynamically change operational parameters such as wafer routing paths and processing sequences. When maintenance is required on one unit block, the control system changes the routing parameters to direct wafers through alternative paths, maintaining productivity while managing transport complexity through intelligent control rather than physical reconfiguration.
Data Source
AI summary
In one embodiment, a coating and developing apparatus is provided with transfer units, provided between a stack of early-stage processing unit blocks and a stack of later-stage processing unit blocks to transfer a substrate between the transport mechanisms of laterally-adjacent unit blocks, and a vertically-movable auxiliary transfer mechanism for transporting a substrate between the transfer units. A stack of first developing unit blocks is stacked on the stack of early-stage processing unit blocks, and a stack of second developing unit blocks is stacked on the stack of later-stage processing unit blocks.