Integrated Inspection Coupon for Coating Defect Detection
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Solution Overview
Problem
Existing plasma-resistant coatings in semiconductor manufacturing, such as yttrium-based coatings, suffer from defects like voids, spalling, and rough surfaces, leading to substrate contamination and process failures, especially in extreme ultraviolet lithography systems, which impact wafer quality and manufacturing costs.
Innovation Solution
The use of integrated inspection coupons with multiple faceted surfaces, coated with a durable metal oxide coating, allows for simultaneous analysis of various surfaces, reducing defects and improving quality control by providing multiple certificates of analysis (CoA) efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional plasma-resistant coatings (e.g., yttrium-based) are applied to coated components, then protection against ionized environments and high temperatures is achieved, but defects such as voids, spalling, and rough surfaces occur leading to substrate contamination
Solution Approach 1:
The patent creates a digital 3D copy of the coated component's surface topology using non-contact scanning. This digital model serves as a reference to identify and analyze coating defects without physically touching or damaging the component, enabling quality assessment while preserving component integrity.
Solution Approach 2:
The patent replaces traditional mechanical contact-based inspection methods with non-contact optical scanning. This substitution eliminates mechanical stress on the coated surfaces and enables detection of subtle defects like voids and spalling without causing further damage or contamination.
2Manufacturing precision
If multiple separate inspection coupons are used to analyze different surfaces, then comprehensive quality coverage is achieved, but process complexity and time consumption increase
Solution Approach 1:
The patent merges multiple inspection functions into a single integrated inspection coupon that can capture data from multiple surfaces and angles simultaneously. This consolidation reduces the number of separate inspection steps while maintaining comprehensive quality coverage across all critical surfaces.
Solution Approach 2:
The inspection coupon is designed with multi-functional capability to inspect various surface geometries and orientations in a single operation. The coupon can be positioned to capture data from planar, curved, and complex surfaces, eliminating the need for multiple specialized inspection tools.
3Measurement precision
If traditional coating inspection methods are used, then basic quality assessment is achieved, but detection precision and scanning speed are insufficient for high-volume manufacturing
Solution Approach 1:
The patent employs dynamic scanning capabilities that can adapt inspection parameters in real-time based on surface geometry and detected defect characteristics. The system adjusts scanning resolution, speed, and angles dynamically to optimize both detection precision and inspection throughput for different inspection scenarios.
Solution Approach 2:
The inspection system utilizes variable parameters including adjustable scanning resolution, multiple detection wavelengths, and configurable inspection angles. These parameters can be optimized for specific defect types and surface conditions, enabling high-precision detection while maintaining rapid inspection speeds through parameter optimization.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the quality control process by minimizing defects and contamination, increasing throughput and reducing costs through faster, more precise scanning of coated parts, thereby improving the performance and longevity of semiconductor manufacturing equipment.
Implementation Method 1
The analysis device is configured to scan the coating on the integrated coupon to determine one or more coating quality parameters
Data Source
AI summary
To improve quality assurance and durability of coated components, a multifaceted inspection coupon is provided that includes opposing flat surfaces, separated by sides which include one or more curves or fillets representing surfaces of the coated components to be inspected. The inspection coupon is coated on all sides in the same manner as the components to be inspected, whereby later analysis of the coupon provides quality assurance of all coated surfaces of the components at once.