Multi-Size Substrate Handling End Effector Design
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Solution Overview
Problem
Semiconductor fabrication industries face challenges in handling substrates of different sizes, particularly the transition from 200 mm to 300 mm wafers, where existing substrate handling robots are often designed for a single substrate size, leading to obsolescence issues and the need for separate tools for each size.
Innovation Solution
The development of a substrate handling apparatus with a pair of end effectors featuring first and second sets of contact pads configured to support substrates of different sizes, allowing a single robot to handle both 200 mm and 300 mm wafers, and the ability to retrofit existing robots without replacing the entire system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If substrate handling robots are designed for a single substrate size, then handling precision for that size is optimized, but the system becomes obsolete when transitioning to different substrate sizes
Solution Approach 1:
The end effector is designed with multiple sets of contact pads (first set for 300 mm substrates, second set for 200 mm substrates) that can be selectively positioned, allowing a single device to handle multiple substrate sizes. This multi-functional design eliminates the need for separate handling robots for different wafer sizes while maintaining optimized handling for each size.
Solution Approach 2:
The end effector incorporates rotatable contact pads that can be dynamically repositioned between different configurations. The rotation mechanism allows the contact pads to switch between supporting larger 300 mm substrates and smaller 200 mm substrates, providing adaptive versatility without requiring multiple static end effectors.
2Reliability
If separate tools are purchased for each substrate size, then handling capability for each size is ensured, but cost and system complexity increase
Solution Approach 1:
A single substrate handling robot equipped with the multi-configuration end effector can reliably handle both 300 mm and 200 mm substrates, eliminating the need for separate tools for each substrate size. This universal design maintains reliable handling capability while significantly improving system flexibility and reducing equipment costs.
3Adaptability or versatility
If existing substrate handling robots are retrofitted, then obsolescence is reduced, but the retrofitting complexity increases
Solution Approach 1:
The end effector is designed as a modular assembly with distinct first and second sets of contact pads that can be independently positioned. This segmentation allows the retrofitting process to focus on replacing or reconfiguring only the end effector component rather than the entire robot system, simplifying the retrofit implementation while expanding substrate size capability.
Data Source
AI summary
Embodiments of methods and apparatus for handling substrates of different sizes are provided herein. In some embodiments, an apparatus for handling substrates of different sizes includes: a pair of end effectors having a first set of contact pads configured to support a substrate having a first size and a second set of contact pads configured to support a substrate having a second size, smaller than the first size.