November 2009 Issue Print E-mail
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Sunday, 01 November 2009 00:00

Circuits Assembly November 2009 cover

FEATURES

  • Paste Printing
    Overlooked Features of Stencil Printers
    Some PCB assemblers opt not to use vision inspection and other major stencil printer features, as well as setup process techniques. Yet several problems can occur if a vision inspection isn’t deployed.
    by Alex del Rosario

  • Cover Story
    Tin Whisker Observations
    Tin whiskers are known to be a hairy problem, with the potential to cause transient or catastrophic electrical short circuits. Here, Raytheon and industry colleagues reveal the observations and SEM images of tin whiskers captured during a series of investigations and experiments aimed at better understanding their growth, evaluating associated reliability risks, and developing mitigation techniques.
    by Robert R. Ogden and Robert F. Champaign

  • Process Control
    Minimizing Solder Paste Printing Variation
    Research into printing process factors finds the stencil blade angle affects the overall time the paste spends over the aperture, as well as the maximum filling pressure. Both characteristics have a significant effect on the resultant aperture fill.
    by George Babka

FIRST PERSON

MONEY MATTERS

  • Focus on Business
    Focused government investment can have a positive impact on business.
    Susan Mucha

TECH TALK


DEPARTMENTS

Off the Shelf

Last Updated on Friday, 20 November 2009 12:43
 

Columns

Eastern-US: China’s New Competitor?

Parity emerges among EMS Factories from Asia, Mexico and the US.

For the first time in years we see parity in the Eastern US among EMS factories from Asia, Mexico and the US. This EMS market condition will permit American OEMs (the EMS industry refers to OEMs as customers) to have more EMS pathways to choose from. Now more than ever, such EMS assignments will require deeper investigation relating to the OEMs’ evaluation of manufacturing strategies.

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The Human Touch

For those who count on the electronics industry for big feats, it’s been a remarkable couple of years.

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Features

Advances in Concentration Monitoring and Closed-Loop Control

Contaminated bath water skews refractive index results. New technology can accurately measure aqueous cleaning agent concentration.

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Circuits Disassembly: Materials Characterization and Failure Analysis

A systematic approach to nonconventional methods of encapsulant removal.

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Products

Panasonic Debuts PanaCIM Maintenance with Augmented Reality
PanaCIM Maintenance with Augmented Reality software provides instant communication and information to factory technicians -- when and where it is needed -- so they can respond to factory needs more...