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100+ Breakthrough Repair/Rework Guides Illustrated and Online
Free online guidebook, packed with detailed illustrations, will be helpful to anyone who needs to repair or rework circuit board assemblies to IPC standards.
Circuit Technology Center

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Wave Soldering Seminar - October 7
The one-day wave soldering seminar trains participants in process parameters, defect correction, machine maintenance & hands-on PowerWave system use to optimize solder quality and reduce production costs.
SEHO

Ask the Experts Member

Walter Pierowski

Process Engineer
Esterline Interface Technologies

Mr. Pierowski is currently a Process Engineer for SMT and Electrical Assembly with 20+ years of experience. A majority of the experience was based in screen/stencil printing for electronics manufacturing including application support for SMT, LTCC, HTCC and thick film.

Walter Pierowski has submitted responses to the following questions.

LED Component Shift During Reflow
One of the most common reasons for a component to shift during reflow is that it is"floating." The reason a ...

BGA Ball Sheer Testing
That is exactly the results I would expect from a mechanical removal of a BGA. Remember solder is designed to ...

ENIG Solderability Issues
My first check would be for any contamination on the circuit board. I have in the past had issues when ...

Cleanliness Testing
One new technique is a localized cleanliness tester. There is one called C3 from Foresite. With this type of cleanliness ...

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The "Fried Egg" Effect in Soldering
Burnt-on flux residue that is visible on the solder mask of PCBs after improper reflow settings produces significant challenges to the reliability of finished boards.
KYZEN