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- Title
Characteristics of environmental factor for electrochemical migration on printed circuit board.
- Authors
Bo-In Noh; Seung-Boo Jung
- Abstract
This study investigates whether electrochemical migration (ECM) is affected by factors such as the printed circuit board (PCB) material, distance between the conductors, bias voltage, contamination and underfill process under water drop (WD), temperature and humidity bias (THB), and polarization tests. The resistance of ECM with polyimide PCB was greater than that with FR-4 (flame resistant-4) PCB. The ECM rate was increased by decreasing the distance between the conductors of opposite polarity and increasing the bias voltage. The cured underfill on PCB protected the ECM growth, while contamination with chlorine ions accelerated the ECM growth.
- Subjects
ELECTROCHEMICAL analysis; ELECTROCHEMICAL apparatus; ELECTRONIC circuits; ELECTRICAL conductors; ELECTRIC potential; INDUSTRIAL contamination; TEMPERATURE; HUMIDITY; POLARIZATION (Electricity); POLYIMIDES
- Publication
Journal of Materials Science: Materials in Electronics, 2008, Vol 19, Issue 10, p952
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-007-9421-3