Integrated Substrate Inspection Chamber with Movable Holder
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Solution Overview
Problem
Current substrate inspection processes are inefficient due to the need for separate modules for edge, frontside, and backside inspections, which increases the duration of transferring substrates and raises costs.
Innovation Solution
An apparatus and method that integrate edge area inspection with backside and frontside inspections in a single chamber, using a movable holder, retractable arm, and inspectors with adjustable configurations to reduce transfer time and interference, allowing simultaneous bright and dark field defect mapping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate modules are used for edge, frontside, and backside inspections, then each inspection function is dedicated and reliable, but the substrate transfer time increases and inspection efficiency decreases
Solution Approach 1:
The patent combines edge inspection module, frontside inspection module, and backside inspection module into a single integrated inspection chamber. The movable holder can position the substrate at different locations within the same chamber to enable all three inspection types sequentially without requiring physical transfer between separate modules, thereby reducing transfer time while maintaining inspection reliability.
Solution Approach 2:
The inspection chamber is designed as a universal platform that can perform multiple inspection functions (edge, frontside, backside) using the same chamber space. The movable holder and positioning mechanisms enable the single chamber to adapt to different inspection configurations, eliminating the need for dedicated separate modules for each inspection type.
2Adaptability or versatility
If separate modules are used for different inspection types, then each module can be optimized for its specific function, but the overall device complexity and cost increase
Solution Approach 1:
Multiple inspection modules that would traditionally require separate physical devices are merged into a single integrated chamber. The chamber contains all necessary inspection components (light sources, detectors, positioning mechanisms) arranged to perform edge, frontside, and backside inspections without requiring multiple independent modules, thereby reducing device complexity while maintaining functional versatility.
Solution Approach 2:
The patent employs a movable holder with adjustable positioning capabilities that can dynamically reposition the substrate within the inspection chamber. This dynamic positioning system allows a single static chamber to perform multiple inspection functions that would otherwise require separate fixed modules, reducing overall system complexity while maintaining adaptability.
3Manufacturing precision
If the substrate is transferred between multiple positions for different inspections, then complete surface coverage is achieved, but the inspection duration increases
Solution Approach 1:
The inspection process is designed as a continuous operation within a single chamber. The movable holder continuously repositions the substrate through different locations (edge position, frontside position, backside position) without interrupting the inspection flow or requiring external transfer operations. This continuous repositioning within the same chamber maintains complete surface coverage while minimizing idle transfer time.
Solution Approach 2:
The substrate is pre-loaded onto the movable holder at the beginning of the inspection process, and all subsequent repositioning operations are performed within the inspection chamber using the holder's integrated positioning mechanisms. This preliminary loading and in-chamber repositioning eliminates the need for repeated external transfer operations, maintaining inspection completeness while improving efficiency.
Data Source
AI summary
The present disclosure provides an apparatus for substrate inspection, including a chamber, a movable holder in the chamber and configured to hold a substrate and transfer the substrate between a first position and a second position, a first inspector under the first position and the second position in the chamber, and configured to inspect a backside of the substrate, a lifter under the second position in the chamber, and configured to support the substrate and move the substrate from the second position to a third position, and a second inspector near the third position in the chamber and configured to inspect an edge of the substrate at the third position.