Movable Platform Rotates to Compact Substrate Handling Chamber
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Solution Overview
Problem
Conventional semiconductor processing systems have a large footprint and require complex, slow, and expensive robots due to linearly arranged load ports, which reduces throughput and complicates maintenance access.
Innovation Solution
A front-end interface with a movable platform that rotates about a vertical axis to reposition substrate carriers between linearly aligned and misaligned positions, allowing access by a smaller, simpler robot and maintaining maintenance access without reducing load ports, by incorporating a side load port and stationary platforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If load ports are arranged linearly along the front wall to meet SEMI standards, then substrate carriers can be delivered in standard orientation, but the system footprint becomes large and robot complexity increases
Solution Approach 1:
The load platform is made movable rather than fixed, allowing it to rotate between a first position (for standard carrier delivery) and a second position (for substrate transfer). This dynamic repositioning enables the system to accommodate both SEMI standard requirements and compact layout needs, reducing the overall footprint while maintaining adaptability.
Solution Approach 2:
Instead of arranging load ports only linearly along the front wall (one-dimensional arrangement), the invention introduces rotational movement to access load ports from different spatial positions. The side load port on the side wall provides access from a different dimension, allowing compact arrangement while maintaining standard compatibility.
2Adaptability or versatility
If load ports are arranged linearly along the front wall, then standard carrier delivery is enabled, but robot complexity and cost increase
Solution Approach 1:
The movable load platform rotates to different positions, allowing a simpler robot to access substrates from multiple angles. This dynamic reconfiguration reduces the robot's travel distance and complexity compared to a fixed linear arrangement where the robot would need to traverse the entire front wall.
Solution Approach 2:
The movable load platform acts as an intermediary between the standard carrier delivery system and the substrate handling robot. It receives carriers in standard orientation and repositions them to accessible locations, simplifying the robot's task while maintaining compatibility with SEMI standards.
3Adaptability or versatility
If linear arrangement of load ports is used, then standard carrier delivery is enabled, but maintenance access becomes complicated
Solution Approach 1:
The movable load platform can be rotated out of the way to provide clear access to the side wall and internal components for maintenance. This dynamic repositioning capability allows maintenance personnel to access critical components without navigating around fixed linear load port structures.
Solution Approach 2:
The load handling function is segmented into the movable platform and the fixed chamber structure. This segmentation allows the platform to be independently positioned for maintenance access, separating the substrate handling function from the maintenance access path.
4Area of stationary object
If the movable platform rotates to reposition substrate carriers, then footprint is reduced and robot complexity is lowered, but additional mechanisms are required
Solution Approach 1:
The movable load platform performs multiple functions: receiving carriers in standard orientation, repositioning them for robot access, and providing maintenance access. This multi-functionality justifies the added mechanism complexity by eliminating the need for separate systems for each function, ultimately reducing overall system complexity.
Data Source
AI summary
An apparatus for processing substrates may include a substrate handling chamber having a substrate load port on a side wall, and a movable platform movably engaged with the handling chamber between a first position and a second position. The first position is such that a substrate carrier on the movable platform is inaccessible by a substrate handling robot inside the chamber. The second position is near to the load port such that a substrate carrier on the movable platform is accessible by a substrate handling robot inside the handling chamber. The movable platform is configured to rotate about a generally vertical axis between the first and second positions.