Substrate Inspection System Using Commercial Process Nodes
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Solution Overview
Problem
Existing integrated circuit inspection systems face challenges in flexibility, reliability, and cost due to reliance on customized hardware and switched fabric topologies, which are costly, inflexible, and lack standardization.
Innovation Solution
A substrate inspection system utilizing a sensor array with a high-speed network, process nodes, and a job manager that communicates through high-speed interfaces, allowing for data marshalling and image processing without dependence on specific CPUs or operating systems, using commercially available components like dual 2 GHz G5 PowerMac computers and gigabit Ethernet networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If customized hardware is used in inspection systems, then manufacturing precision can be improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces customized hardware systems with a software-based processing architecture running on commercial off-the-shelf computers. The inspection system uses standard PCs with configurable software algorithms to perform defect detection, eliminating the need for specialized hardware circuits while maintaining inspection accuracy through flexible software-based image processing and analysis.
Solution Approach 2:
The patent employs universal commercial computer hardware that can perform multiple functions through software configuration. The same standard PC platform can be used for different inspection tasks by loading different algorithms, making the system adaptable to various inspection requirements without requiring specialized hardware for each application.
2Manufacturing precision
If customized hardware is used in inspection systems, then manufacturing precision can be improved, but reliability decreases
Solution Approach 1:
The patent substitutes reliable commercial off-the-shelf computer hardware with customized hardware systems. These standard PCs have proven track records for reliability and are supported by extensive engineering resources, whereas customized hardware lacks such support infrastructure and has lower inherent reliability.
Solution Approach 2:
The patent leverages the self-updating and self-improving capabilities of commercial software and hardware ecosystems. Commercial products receive continuous bug fixes, security updates, and performance improvements from manufacturers, automatically enhancing system reliability without requiring custom maintenance procedures.
3Speed
If switched fabric topology is used, then data communication speed can be improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the complex switched fabric network topology and replaces it with simpler, standard network infrastructure. The system uses conventional Ethernet networks and standard communication protocols, removing the need for specialized high-speed switching fabric hardware while maintaining adequate data communication speeds through optimized software data handling.
Solution Approach 2:
The patent replaces the physical switched fabric hardware network with software-based data communication over standard networks. Data is transmitted using conventional network protocols through standard Ethernet infrastructure, eliminating the need for complex custom-built high-speed switching hardware while achieving sufficient communication performance.
4Manufacturing precision
If customized hardware is used, then manufacturing precision can be improved, but ease of manufacture decreases
Solution Approach 1:
The patent substitutes difficult-to-manufacture customized hardware with easily acquired commercial off-the-shelf computers. Standard PCs are readily available from multiple manufacturers, require no special fabrication processes, and can be deployed quickly, dramatically simplifying the manufacturing and deployment process while maintaining inspection capabilities through software.
Solution Approach 2:
The patent uses inexpensive, easily replaceable commercial computer hardware instead of expensive, difficult-to-manufacture customized systems. If a standard PC fails or needs upgrading, it can be quickly replaced without complex reconfiguration or specialized manufacturing, reducing the overall difficulty and cost of system manufacturing and maintenance.
Data Source
AI summary
An inspection system for detecting anomalies on a substrate. The inspection system has a sensor array for generating image data. A first high speed network is coupled to the sensor array and receives and communicates the image data. An array of process nodes is coupled to the first high speed network, and receives and processes the image data to produce anomaly reports. Each process node has an interface card coupled to the first high speed network, that receives the image data from the first high speed network and formats the image data according to a high speed interface bus protocol. The interface card sets a register indicating whether a predetermined amount of image data has been stored in a memory, and the process node reads the register to determine whether the predetermined amount of image data has been stored in the memory, and initiates image processing when the register indicates that the predetermined amount of image data has been stored in the memory.