ESD Test System Predicting IC Susceptibility via Electromagnetic Wave Analysis
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Solution Overview
Problem
Semiconductor integrated circuits may pass electrostatic discharge (ESD) tests but still fail when mounted in electronic systems due to variations in electromagnetic characteristics caused by circuit board layout and housing, leading to susceptibility to ESD.
Innovation Solution
An ESD test system and method that predicts ESD characteristics by detecting weak frequency bands, peak-to-peak voltage signals, and frequency spectra using multiple test boards and electromagnetic waves, generating a second peak-to-peak voltage signal to anticipate ESD behavior in electronic systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional ESD tests are performed on semiconductor integrated circuits, then the circuits can be identified as passing or failing, but the test results cannot predict actual ESD susceptibility in electronic systems due to electromagnetic characteristic variations
Solution Approach 1:
The patent segments the ESD testing process into multiple independent test boards (first test board with DUT, second test board with receiving module, third test board with housing). Each test board performs a specific measurement function, allowing the system to comprehensively evaluate electromagnetic characteristics without requiring a single complex test apparatus.
Solution Approach 2:
The patent introduces electromagnetic waves as an intermediary medium to transfer energy between test boards and the device under test. By radiating electromagnetic waves and detecting their interactions, the system can indirectly measure ESD susceptibility without direct physical contact, enabling prediction of real-world performance.
2Reliability
If electromagnetic wave radiation is performed on multiple test boards to detect weak frequency bands and voltage signals, then ESD characteristics can be predicted, but the testing process becomes more time-consuming
Solution Approach 1:
The patent performs preliminary measurements on separate test boards to characterize electromagnetic wave interactions before final ESD susceptibility determination. By pre-detector weak frequency bands and voltage signals on controlled test boards, the system builds a database for predicting actual ESD performance without requiring lengthy real-time testing.
Solution Approach 2:
The patent implements feedback mechanisms where detection results from electromagnetic wave interactions are fed back into the analysis system. The detected voltage signals and frequency spectra are processed to generate predictions, which can then be used to adjust subsequent testing parameters and focus measurements on critical frequency bands.
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
Enables prediction of ESD characteristics in electronic systems before product shipment, reducing the likelihood of soft failures and improving semiconductor integrated circuit reliability.
Implementation Method 1
an electromagnetic wave radiating module configured to radiate electromagnetic waves
Implementation Method 2
a second test board including an electromagnetic wave receiving module configured to receive the electromagnetic waves
Data Source
AI summary
In a method of manufacturing an integrated circuit involving performing an electrostatic discharge (ESD) test, a weak frequency band is detected by sequentially radiating a plurality of first electromagnetic waves on a first test board including the integrated circuit. First peak-to-peak voltage signals are detected by sequentially radiating the plurality of first electromagnetic waves on a second test board including an electromagnetic wave receiving module. A frequency spectrum is detected by radiating a second electromagnetic wave on a housing including a third test board including the electromagnetic wave receiving module. A second peak-to-peak voltage signal is generated based on the weak frequency band, the first peak-to-peak voltage signals and the frequency spectrum. An ESD characteristic associated with an electronic system including the integrated circuit is predicted based on the second peak-to-peak voltage signal.