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Lead Free Solder Reliability Issues in Military and Aerospace

Rob Wilson

#32274

Lead Free Solder Reliability Issues in Military and Aerospace | 26 January, 2005

I saw in a presentation that military testing of lead-free soldering for reliability has not gone well. Basically, unlike commercial applications where the alloys performed better they did worse when under the more extreme military and aerospace conditions (-55 to 125 I believe). Can anyone point me to these studies?

Thanks, Rob

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#32277

Lead Free Solder Reliability Issues in Military and Aerospace | 26 January, 2005

#32283

Lead Free Solder Reliability Issues in Military and Aerospace | 26 January, 2005

There is: * NO information to indicate leadfree solder is at all reliable regardless of class of operation. * NO material model for leadfree solder, whereas the model for lead solder was developed over many years back during a time when companies believed developing such things were important. * NO basis for accelerated testing as a point of comparison between lead and leadfree solders, because the creep of leadfree is 100X lead solder.

It's just that people accept using leadfree solders in consumer class goods, because there's few catastrophic things that can happen when using those products. Right? [What? They're going leadfree at Airbus & Boeing. Ooooo. Line-up the lawyers.]

In response to your question: * EMPF [610-362-1320] might know the answer to your question. * Anthony J. Rafanelli [Raytheon Naval & Maritime Integrated Systems-MS 369, 1847 West Main Road, Portsmouth, RI 02871 Anthony_J_Rafanelli@raytheon.com ] published a paper titled "The Lead-Free Solder Alternatives Issue: A Defense Industry Perspective". He may be able to help.

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#32284

Lead Free Solder Reliability Issues in Military and Aerospace | 26 January, 2005

Amen Dave

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Reflow Oven

Used SMT