A fast and simple algorithm for locating short circuits on printed circuit boards

1996 ◽  
Vol 45 (1) ◽  
pp. 288-292 ◽  
Author(s):  
A.S. Nizamani
Keyword(s):  
Printed Circuit Boards ◽  
Simple Algorithm ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Short Circuits

Electromigration and Flux Residues

2021 ◽  
Vol 105 (1) ◽  
pp. 401-409
Author(s):  
Jiri Stary ◽  
Petr Vanysek ◽  
Vitezslav Novak
Keyword(s):  
Printed Circuit Boards ◽  
Electrochemical Impedance ◽  
Basic Knowledge ◽  
Circuit Boards ◽  
Printed Circuit ◽  
Soldering Process ◽  
Surface Finishes ◽  
Surface Insulation Resistance ◽  
Short Circuits ◽  
Through Hole

Electromigration and its subcategory electrochemical migration is a serious problem in electronic industry working with printed circuit boards (PCB). Smaller equipment with high density of interconnection (HDI) is assembled with surface mounted devices (SMD) and through hole components (THC) Assembly techniques are realised mainly by soldering process with no clean fluxes. Result is not only a reliable solder joint, but also flux residues. The first part of the article after short theory is focused on gatering basic knowledge about fluxes and surface finishes by using cyclic voltammetry (CV) and electrochemical impedance spectrometry (EIS). The second part of the experiments is oriented on practical test with different fluxes for wave and reflow soldering. These tests are associated with the reduction of surface insulation resistance, corrosion, dendrite/fiber growth and the formation of subsequent short circuits. The acceleration of these electrochemical reactions is helped by higher working temperatures, higher humidity, and magnitude \ and frequency of electrical voltage between the conductors.

Slit Effect of Common Ground Patterns in Affecting Cross-Talk Noise between Two Parallel Signal Traces on Printed Circuit Boards

2008 ◽  
Vol 128 (11) ◽  
pp. 657-662 ◽  
Author(s):  
Tsuyoshi Maeno ◽  
Yukihiko Sakurai ◽  
Takanori Unou ◽  
Kouji Ichikawa ◽  
Osamu Fujiwara
Keyword(s):  
Cross Talk ◽  
Printed Circuit Boards ◽  
Common Ground ◽  
Circuit Boards ◽  
Printed Circuit
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