Tag Archives: solder paste
Weibull Part III
Folks, Our discussion of Weibull Analysis continues…. Let’s say you have worked hard and assembled some SMT lead-free PCBs for thermal cycle testing. You used the best lead-free solder paste and some lead-free solder preforms as you assembled several through-hole … Continue reading
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Tagged figure skating, pin-in-paste, solder paste, thermal cycling, Weibull distribution
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Can Your Mortality be Modeled with Weibull Distribution?
Folks, In the last posting we saw how Weibull analysis helped us to determine that SACM lead-free solder (SAC 105 with about 0.1% manganese) has comparable (actually better) thermal cycle performance versus SAC 305 solder. Software like Minitab will give … Continue reading
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Tagged electronics assembly, SAC 105, SAC 305, solder joint reliabilty, solder paste, Weibull distribution
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On Stats and Solders
Folks, Everyday, we are exposed to the results of surveys and polls. A typical example might be that President Obama is leading Mitt Romney in a poll by 48% to 45%, but the results are not statistically significant. A reasonable … Continue reading
The Price-Profitability Paradox
Let’s see how Patty and Pete are making out on their latest adventure…. “Here is the ProfitPro output,” Dave Ferris said as he pointed to a PowerPoint slide on the screen. Just then, the site general manager, Sally Wilson, and … Continue reading
In Search of a Problem to Solve
It has been a while, let’s look in on Patty … Patty had to admit that she was very fortunate. She had yet to turn 30 and she was a Senior Vice President at ACME. There was even a small article … Continue reading
Talking Cleaning with Mike Bixenman
Folks, There is a lot of interest in cleaning PCBs assembled with no-clean solder pastes. Recently I discussed the topic with my good friend Mike Bixenman of Kyzen. Dr. Ron (DR): Mike, many of the best performing lead-free and lead … Continue reading
Patty on Call
Let’s see how Patty is doing with the latest crisis … Upon hearing Claire Perkins inform her that Rob was in the hospital, Patty froze and her face looked ashen. She quickly recovered and got her cell phone out to call … Continue reading
Pb-Free Sky is Not Falling
Folks, Although a few have suggested that lead-free reliability is an oxymoron, currently most people that have studied the reliability of SAC3XX and SAC105 Pb-free solders would conclude something akin to what Denny Fritz wrote in response to one of … Continue reading
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Tagged Denny Fritz, lead-free, Motorola, SAC387, solder paste, Vahid Goudarzi
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Some Consensus on SAC
Back in November, I posted comments on lead-free availability. In this post, I mentioned that I chaired a session at SMTAI on Alternate Alloys. At this session, Greg Henshall presented a paper on the Low Silver BGA Sphere Metallurgy Project. … Continue reading
Posted in Dr. Ron
Tagged alloys, Denny Fritz, Greg Henshall, lead-free, SAC 305, solder paste, thermal cycle reliability, Werner Engelmaier
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