printed circuit board

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printed circuit board

n
(Electronics) an electronic circuit in which certain components and the connections between them are formed by etching a metallic coating or by electrodeposition on one or both sides of a thin insulating board. Also called: printed circuit or printed circuit card
Translations
piirilevy
circuit imprimécircuit imprimé nu

printed circuit board

ncircuito stampato
References in periodicals archive ?
The 5-32b SIR and Electrochemical Migration Task Group discussed the status of several ongoing projects regarding SIR testing.
ECM, or electrochemical migration (FIGURE 1), can wreak havoc on a circuit assembly, causing everything from harmless signal glitches to complete failures.
Other analytical test methods include electrochemical migration resistance and surface organic contamination testing, each performed in accordance with IPC standards.
electrochemical migration and leakage currents) increasingly are the sources of diminished component reliability and service life.
Three common failure mechanisms that tray come into play on RF high-frequency circuits are electrochemical migration (ECM), electromigration (EM), and parasitic capacitance.
This means that the cleaning agent might not be able to clean at its full strength, possibly resulting in board failure due to contamination-induced electrochemical migration.
To err on the side of safety, I would suggest subjecting the product to SIR or electrochemical migration tests when processed under the coolest anticipated SnPb profile--with an adequate safety margin--before it is introduced into production.
If partially ionized, they form hypo-halide solutions that can be very corrosive and result in electrochemical migration and contamination-induced leakage currents.
Residues from organic chemicals can cause corrosion or lead to electrochemical migration.
As the distance between conductors reduces, the risk of electrochemical migration increases.

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