March 2012 Print E-mail
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Monday, 09 May 2011 00:00

March 2012 cover

FEATURES

    Conformal Coatings
    Protecting Silicon with Silicone
    Silicone chemistry is a unique combination: neither purely organic (i.e., carbon-based) nor purely inorganic (i.e., silicon-based), but a molecular-level hybrid of both. The nature of the Si-O bond in the polymer backbone creates low rotation barriers and large bond energies. This inorganic polysiloxane backbone provides the foundation for building materials with superior thermal properties, environmental resistance and flexibility, even at temperatures below -70oC. New systems are more robust, faster curing and require less energy than conventional chemistry.
    by Brian Chambers

    Parts Qualification
    Detection of Counterfeit Components
    During an investigation, a finding that suggests a part is counterfeit must be verified beyond the testing itself. If a construction material is identified that is not the same as that on a verified genuine comparison part, the investigators must ensure that this is not accounted for by acceptable changes made by the manufacturer. This underscores that such investigations are often not as straightforward as they may seem. This discussion by a major US prime defense contractor points out alternate, less common methods for counterfeit detection. These are important, as often components that seemingly pass incoming inspections may still be counterfeit.
    by W. John Wolfgong, Ph.D., James Izzo and Mark Depriest

 

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TECH TALK

Last Updated on Tuesday, 13 March 2012 23:45
 

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

Yincae Rolls Out ACP120 Solderable Coating
ACP 120 series anti-oxidation solderable coatings replace nanofilm gold. Are for anti-corrosion and anti-rusting on solderable surfaces on which solder paste, solder preform or a solder ball can be...