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New testing approach using near electromagnetic field probing intending to upgrade in-circuit testing of high density PCBAs
- Source :
- 27th IEEE North Atlantic Test Workshop, 27th IEEE North Atlantic Test Workshop, May 2018, Essex, United States. ⟨10.1109/NATW.2018.8388867⟩, NATW
- Publication Year :
- 2018
- Publisher :
- HAL CCSD, 2018.
-
Abstract
- International audience; With the density increase of today's printed circuit board assemblies (PCBA), the electronic test methods reached their limits, in the same time the requirements of high reliability and robustness are greater. Original equipment manufacturers are obliged to reduce the number of physical test points and to find better-adapted test methods. Current test methods must be rethought to include a large panel of physical phenomena that can be used to detect electrical defects of components, absence, wrong value, and shorts at component level on the board under test (BUT). We will present the possibility of using electromagnetic signature to diagnose faulty components contactlessly. The technique consists in using small diameter near electromagnetic field probes, which detect the field distribution over powered sensitive components. A giant magnetoresistance (GMR) sensor was used as well to detect variations in low frequency components. The loading of the BUT is specifically chosen to enhance the sensitivity of the EM measurements. Reference EM signatures are extracted from a fault-free circuit, which will be compared to those extracted from a sample PCBA in which we introduced a component level defect by removing or changing the value of critical components. As a result, we will show that the amplitude of a specific harmonic acts as a sensing parameter, which is accurately related to the variation of the component value.
- Subjects :
- Electromagnetic field
Electromagnetics
Computer science
Near electromagnetic field
02 engineering and technology
01 natural sciences
law.invention
Printed circuit board
Robustness (computer science)
law
In-circuit test
statistical PCBA testing
0202 electrical engineering, electronic engineering, information engineering
Electronic engineering
High density PCBA testing
Design for testability
010401 analytical chemistry
Accessibility
Giant magnetoresistance sensors
020202 computer hardware & architecture
0104 chemical sciences
[SPI.TRON]Engineering Sciences [physics]/Electronics
Capacitor
Amplitude
Contactless testing
Physical test
Testability
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- 27th IEEE North Atlantic Test Workshop, 27th IEEE North Atlantic Test Workshop, May 2018, Essex, United States. ⟨10.1109/NATW.2018.8388867⟩, NATW
- Accession number :
- edsair.doi.dedup.....659250bb1d99dc925cce3fd4b15451e2