Embedded Transient Scanning System for Integrated Circuit Node Characterization
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Solution Overview
Problem
Current methods for detecting and characterizing transient events in integrated circuits are invasive, costly, and unable to provide detailed insights into individual subsystem components or failure mechanisms, especially in assembled systems, leading to mischaracterization of soft failures and inefficiencies in manufacturing and field diagnostics.
Innovation Solution
An embedded transient scanning system and methodology that detects and characterizes transient events within integrated circuits without disassembly, using integrated circuit nodes and existing interfaces like PCI or JTAG, allowing for non-destructive monitoring and data collection during assembly, manufacturing, and end-user environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If invasive probing techniques are used to isolate and instrument device nodes for analysis, then detailed insights into individual subsystem components and failure mechanisms can be obtained, but system integrity is broken and the system is exposed to unrelated induced electromagnetic fields from pulse simulators
Solution Approach 1:
The patent introduces an intermediary embedded transient scanning system that interfaces with the integrated circuit through existing interfaces (PCI, JTAG, boundary scan) without requiring invasive physical probing. This mediator enables transient event detection while preserving system integrity by avoiding direct physical intrusion into the circuit nodes.
Solution Approach 2:
The patent replaces the mechanical/invasive probing system with an electronic/software-based embedded scanning system. Instead of physically connecting probes to circuit nodes, the system uses existing digital interfaces and embedded logic to detect and characterize transient events, thereby eliminating the need to break system integrity.
2Measurement precision
If electromagnetic interference three-dimensional scanning systems are used to detect transient currents, then detailed estimates of which local device is affected can be obtained, but the scanning time becomes excessively long (20 hours for a 5 cm×5 cm PCB)
Solution Approach 1:
The patent incorporates transient scanning capabilities directly into the integrated circuit during manufacturing, rather than performing external scanning after assembly. This preliminary embedding of detection functionality enables rapid transient event identification without requiring lengthy external scanning processes.
Solution Approach 2:
The patent transitions from external three-dimensional electromagnetic field scanning to an internal dimension approach by embedding sensors and detection logic within the integrated circuit itself. This dimensional shift from external to internal detection enables significantly faster transient event characterization.
3Reliability
If system level transient testing is performed to qualify product robustness, then minimum qualification levels can be established, but no information is extractable regarding individual subsystem components and failure mechanisms
Solution Approach 1:
The patent segments the transient detection capability to the individual integrated circuit level, allowing each device to independently detect and report transient events. This segmentation enables both system-level robustness qualification and detailed analysis of individual component behavior and failure mechanisms simultaneously.
Solution Approach 2:
The patent implements feedback mechanisms where the embedded transient scanning system continuously monitors and reports transient events back through existing interfaces. This feedback loop provides real-time information about which specific components are affected by transients, enabling detailed failure mechanism analysis while maintaining system-level qualification.
4Measurement precision
If additional precision scanning hardware is deployed to achieve accurate transient detection, then measurement precision improves, but system cost increases significantly
Solution Approach 1:
The patent makes the existing digital interfaces (PCI, JTAG, boundary scan) multi-functional by enabling them to serve both their original purposes and transient event detection. This universality eliminates the need for separate dedicated scanning hardware, reducing system cost while maintaining measurement precision.
Solution Approach 2:
The integrated circuit essentially scans itself for transient events using embedded detection logic and existing interfaces. This self-service capability eliminates the need for external expensive scanning equipment, as the device under test performs its own transient characterization.
Data Source
AI summary
Systems and methods for scanning and characterizing an integrated circuit for transient events. Embedded apparatus can detect transient events that may be incident on the integrated circuit, and moreover, identify particular nodes of the integrated circuit that are affected by the transient event. Additionally, the integrated circuit can be characterized by applying known transient pulses of varying severity to selected nodes of the integrated circuit, detecting the severity levels at which the selected nodes can fail, and storing indications pertaining to pulse severity at which selected nodes can fail. Moreover, based on the characterization, targeted protection mechanisms can be provided for nodes that are characterized as being susceptible.