| June 15, 2011
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From time to time, gold edge contacts become contaminated with solder. This most often occurs during reflow of an assembly and may be caused by solder spatter or solder paste contamination of the contacts due to improper handling, or other reasons.
Solder contamination is certainly an unacceptable condition because oxidation will ultimately build up on the solder, inhibiting a proper electrical connection to the mating connector.
The only reliable way to alleviate the problem is to remove all of the solder contamination and restore the gold plating. What makes the problem troublesome is that ...
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You've asked your board supplier to apply solder mask only where you want it. Now you're up against a deadline and you hear "we've got a problem".
It could be any number of things. This time it's solder mask covering some part of a circuit board where you don't want it. It's certainly not unusual to find test points, ground pads, or even a component footprint inadvertently covered with solder mask. There are several safe and reliable ways to remove solder mask from the circuit board surface.
Grinding and scraping, milling, micro blasting, and chemical stripping are the ...
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Can you fix a broken corner on a circuit board reliably? Do you consider re-balling ball grid array (BGA) components to be a reliable procedure? Should you attempt to repair a damaged plated hole with an inner layer connection?
Your opinion and experiences with issues such as these are important, since the reliability of most circuit board repair and rework procedures are a matter of industry consensus. So, how do you know if a rework procedure will produce a reliable result?
Most rely on a concept and term known as conformance level. The IPC defines conformance level as an indicator of how closely the repaired or reworked circuit board will be to the original ...
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Circuit Technology Center has received ISO 9001:2008 certification, an internationally recognized standard issued to organizations with a quality management system.
The certification was authorized by TUVRheinland, a premier global provider of independent testing and certification services with 15 locations throughout North America.
ISO 9001:2008 provides a set of requirements that must be in place to have a quality management system ...
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