Substrate Carrier Support Structure for Tilt and Shift Prevention
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Solution Overview
Problem
Current central supporting mechanisms in semiconductor substrate carriers suffer from assembly tolerance issues, leading to shifting or tilting, which can cause damage during transportation, and lack effective methods for deviation detection and prevention.
Innovation Solution
A supporting structure with parallel blocks and stress/adjusting blocks that securely fix and adjust supporters, combined with an inspection equipment and calibrating tool to ensure proper alignment and calibration, preventing tilting and shifting, and allowing for precise deviation measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a central supporting mechanism is used in substrate carriers, then substrate support function is provided, but assembly tolerance causes shifting or tilting of supporters
Solution Approach 1:
The supporting mechanism is divided into modular components: backbone with receiving trenches, supporters with limiting portions, and parallel blocks for positioning. This segmentation allows each component to be manufactured separately with controlled tolerances and assembled with precise alignment, preventing the cumulative tolerance errors that affect monolithic structures.
Solution Approach 2:
The design incorporates localized precision features at critical interfaces: limiting portions on supporters, corresponding limiting portions on supporting portions, and parallel blocks with precise geometries. These local quality enhancements ensure accurate positioning and prevent shifting or tilting at key connection points without requiring the entire structure to be manufactured with uniformly high precision.
2Ease of manufacture
If simple assembly method is used for central supporting mechanism, then manufacturing cost is reduced, but deviation detection and prevention capability is lost
Solution Approach 1:
The inspection equipment performs deviation detection before the supporting mechanism is put into service. The calibrating tool establishes reference positions and the inspection equipment measures supporter alignments against these references, identifying deviations before they can cause substrate damage. This preliminary action prevents the need for complex real-time monitoring during operation.
Solution Approach 2:
The inspection equipment and calibrating tool serve as intermediary systems that bridge the gap between simple mechanical assembly and precise deviation control. These separate measurement systems allow the supporting mechanism itself to remain mechanically simple while providing accurate deviation detection and calibration capabilities through external measurement instruments.
3Productivity
If repeated use of substrate carriers occurs, then productivity is improved, but vibration causes supporter shifting or tilting
Solution Approach 1:
The parallel blocks and limiting portions create a pre-positioning system that cushions against vibration-induced shifts. The geometric constraints provided by the limiting portions on both supporters and supporting portions prevent excessive movement during vibration, while the parallel blocks maintain precise spacing. This beforehand cushioning allows repeated use without cumulative positioning errors.
4Device complexity
If no calibration standard is provided for inspection equipment, then device complexity is reduced, but measurement accuracy cannot be ensured
Solution Approach 1:
The calibrating tool creates physical copies or replicas of the standard supporter configurations with known, precise dimensions and positions. These calibration standards are copied from the original design specifications and used as reference objects for the inspection equipment. This copying approach provides accurate measurement references without requiring complex digital calibration systems or proprietary measurement protocols.
Data Source
AI summary
A supporting structure and an inspection equipment thereof and a calibrating tool for the inspection equipment include backbone and parallel blocks in the supporting structure. The receiving trench is defined between two adjacent supporting portions on the backbone for receiving supporter. Each supporting portion has a first limiting portion and the supporter has a second limiting portion. The parallel block is disposed between the first and the second limiting portion to restrain relative movement of the supporter. The inspection equipment is used for inspecting the supporting structure and includes plural inspection regions for inspecting the deviation amount of the supporter based on how much the moving door travels towards the substrate carrier. The calibrating tool is used for calibrating the inspection equipment. Whether the inspection surface conforms with a calibration condition is inspected through the inspection regions based on how much the moving door travels toward the calibrating tool.