April 2014 cover

 

FEATURES

DESIGN QUALIFICATION
Qualification vs. First Article Inspection
Military and commercial product suppliers often overlook what is being asked by their customer when they are asked to qualify a part. What’s more, there’s a disconnect between what FAI is and whether it is a sufficient technique for design qualification.
by Charles Hill and Karen Ebner

DECAPSULATION
Circuits Disassembly: Materials Characterization and Failure Analysis
Common procedures for encapsulant removal apply to most applications. When standard procedures don’t work, however, there are methods that, while unconventional, have proved successful.
by W. John Wolfgong, PH.D., Jana Julien, Jason Wheeler and Joe Colangelo

PCB CLEANING
Advances in Concentration Monitoring and Closed-Loop Control
How does one accurately determine the concentration of chemistry, or an aqueous-based cleaning solution that comprises flux residues, as well as a wide variety of SMT-related residues that are entrained in a cleaning system wash bath? New sensor-based technology is doing so, and with greater accuracy than conventional methods.
by Umut Tosun, Axel Vargas and Bryan Kim, Ph.D.

MURRIETTA CIRCUITS
The One-Stop SoCal Shop

For over 30 years, the family-run Southern California company has been adding services to its printed circuit roots.
by Chelsey Drysdale

 

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