Front End Module Layout for More Chambers and Redundant Wafer Transfer
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Solution Overview
Problem
Current semiconductor manufacturing apparatuses face limitations in increasing the number of processing chambers connected to the front end module, leading to insufficient load ports and potential processing inefficiencies, as well as vulnerabilities in conveying semiconductor substrates when one front end module fails.
Innovation Solution
The semiconductor manufacturing apparatus is designed with a front end module having multiple load ports on its upper surface and multiple processing units connected from different directions, allowing for increased processing chambers and redundancy with dual front end modules, enabling efficient substrate conveyance and continued processing even if one module fails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of processing chambers connected to the front end module is increased, then the number of semiconductor substrates to be processed simultaneously is increased, but the number of load ports becomes insufficient
Solution Approach 1:
The patent transitions from a conventional linear arrangement of processing chambers to a three-dimensional configuration where processing chambers are stacked vertically above each other. This vertical stacking enables multiple chambers to share a single load port, effectively increasing the number of simultaneously processable substrates without proportionally increasing the number of load ports. The robot arm operates in the vertical dimension to transfer substrates between stacked chambers and the load port.
Solution Approach 2:
Each load port is designed to serve multiple processing chambers simultaneously through the vertical stacking arrangement. A single load port can interface with multiple chambers stacked above it, allowing the same load port to handle substrates for different processing chambers. This multi-functional design increases productivity while controlling the number of load ports required.
2Productivity
If processing chambers are arranged in a conventional linear configuration, then the structure is simple, but the number of processing chambers that can be connected to the front end module is limited
Solution Approach 1:
The patent introduces vertical stacking of processing chambers, moving from a two-dimensional linear arrangement to a three-dimensional configuration. Multiple processing chambers are arranged vertically above each other, allowing more chambers to be connected to the front end module within the same footprint. The robot arm operates in the vertical dimension to access and transfer substrates between stacked chambers.
Solution Approach 2:
Processing chambers are nested vertically one above another in a stacked configuration, similar to nested dolls. Each chamber is positioned directly above or below another, creating a compact vertical arrangement. This nesting approach maximizes the number of chambers that can be connected to the front end module while maintaining a compact overall structure.
3Reliability
If a single front end module is used, then the device complexity is reduced, but the system becomes vulnerable to failures affecting all processing chambers
Solution Approach 1:
The system is divided into multiple independent front end modules, each capable of serving a subset of processing chambers. This segmentation creates redundancy, so that if one front end module fails, other modules can continue to operate and serve their respective chambers. The processing chambers can be distributed across multiple front end modules, isolating the impact of failures.
Solution Approach 2:
The system incorporates redundant front end modules in advance to cushion against potential failures. By having multiple independent modules before any failure occurs, the system ensures that a failure in one module does not halt all processing operations. The redundant modules are prepared beforehand to take over or continue independent operation.
Data Source
AI summary
A semiconductor manufacturing apparatus includes a front end module with a load port to which a conveyance container is connected on an upper surface; and a plurality of processing units configured to process a semiconductor substrate, disposed around the front end module in a plan view from a normal direction of the upper surface of the front end module, and each connected to the front end module from at least two directions in the plan view. The semiconductor substrate is conveyed between the conveyance container and the processing units via the front end module.