Richard

UK

Designer

Lead-free solder teething problems?

Perhaps the poor joints were caused by teething problems with the new lead-free solder and less aggressive flux?

In 1971, I had a more surprising problem: Specially tested & space approved transistors which didn't work.

In spite of the expensive certified testing and burning-in, dissection quickly showed that the silicon chips had never been connected to the leads.

Worrying but not disastrous; except that the rest of the batch was already in orbit inside spacecraft!