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Maybe it's the thermocouple connection
If your thermal profiling readings seem inconsistent, the culprit could be your thermocouple attachment method. A recently conducted study revealed some interesting findings.
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Ask the Experts

March 9, 2009 - Updated
March 9, 2009 - Originally Posted

How to bond heavy component to PCB

Can you recommend epoxy to bond a surface mount transformer, 7.5 grams, to a PCB? The board needs to pass 20G vibration and 40G shock tests. What steps do you recommend and in what order should they occur - solder paste, then epoxy, then pick and place, then reflow? Also, how would this process be specified on a drawing, 65% coverage under part, or by volume? Should epoxy pattern under part be dot, striped pattern or solid mass?

C. B.

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RAIG Minimizes Corrosion, Allows Higher Gold on ENEPIG
Paper describes a mixed reaction RAIG electrolyte that minimizes galvanic corrosion and allows higher ENEPIG gold thicknesses, enabling robust designs and world-class quality on target with minimal variation.
Uyemura