Reticle Pod Surface Inspection via Segmented Reciprocating Transport
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Solution Overview
Problem
Current inspection systems for reticle pods in semiconductor lithography are inefficient and time-consuming due to the need to inspect multiple high and low planes and obverse and reverse sides, lacking a high-speed solution that ensures cleanliness and defect detection.
Innovation Solution
A high-speed surface inspection system and method utilizing a cabinet with automated device areas, clamping modules, and optical inspection devices controlled by a travel stroke controller to efficiently inspect reticle pods by dividing them into portions and inspecting each surface separately, significantly reducing inspection time and ensuring cleanliness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional inspection methods are used to inspect all surfaces of reticle pod, then inspection thoroughness is improved, but inspection time increases significantly
Solution Approach 1:
The reticle pod is divided into multiple portions (first portion and second portion), and each portion is inspected separately by dedicated inspection devices. This segmentation allows parallel processing of different surfaces, reducing total inspection time while maintaining thoroughness of inspection across all surfaces.
Solution Approach 2:
The system introduces a temporal dimension by implementing sequential reciprocating motion between loading area, inspection areas, and unloading area. Multiple inspection operations are performed in different time slots and spatial locations, transforming a single sequential inspection process into a multi-dimensional parallel processing system.
2Productivity
If multiple inspection areas and reciprocating motion are introduced, then inspection speed is improved, but device complexity increases
Solution Approach 1:
The clamping module serves multiple functions: it clamps the reticle pod during transport, positions portions for inspection, and facilitates reciprocating motion between different areas. This multi-functionality reduces the need for separate specialized devices, thereby limiting the increase in device complexity while maintaining high inspection speed.
Solution Approach 2:
The travel stroke controller acts as an intermediary that coordinates and controls the reciprocating motion of the clamping module between loading area, multiple inspection areas, and unloading area. This centralized control mechanism simplifies the overall system architecture by providing a single point of coordination rather than multiple independent control systems.
3Productivity
If reticle pod is divided and inspected in portions, then inspection efficiency is improved, but risk of damage increases
Solution Approach 1:
The clamping module is designed to securely hold the reticle pod and its portions during reciprocating motion and inspection processes. This protective clamping mechanism prevents accidental drops or damage while enabling efficient portion-based inspection, thus cushioning against potential damage risks.
Solution Approach 2:
The system replaces manual handling with automated reciprocating motion controlled by the travel stroke controller. This mechanical automation eliminates human error and rough handling, reducing the risk of damage while maintaining high inspection efficiency through programmed precise movements.
Data Source
AI summary
A high-speed surface inspection system for a reticle pod and method comprises a cabinet, a clamping module, a first inspection device, a second inspection device, and a travel stroke controller. An interior of the cabinet is divided into an automated device area, a first inspection area, and a second inspection area. The travel stroke controller controls the clamping module to reciprocate between the automated device area and the first inspection area so as to transport a first portion of the reticle pod, and controls the clamping module to reciprocate between the automated device area and the second inspection area so as to transport a second portion of the reticle pod. A high-speed surface inspection method for a reticle pod is further provided. The present application solves the issue of an inability for efficient surface inspection of a reticle pod.