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Ask the Experts Member

David Suihkonen

President

R&D Technical Services Inc.

David is President at R&D Technical Services, a vapor phase reflow oven manufacturer. he has 20 plus years experience in the vapor phase reflow industry.

David Suihkonen has submitted responses to the following questions.

What Causes Solder Balls During Rework?
As to solder balls during reflow, you may find you need a bit more solder conditioning via preheat before processing ...

Black Land Edges
Couple of questions.Does the black material clean off? What type of preheat are you using?Solder and flux type?I'd be happy ...

Intermittent BGA Test Problems
It sounds as though you're not getting proper wetting of the solder under the BGA. If I had to guess, ...

How Many Zones Needed for a Lead-free Profile?
I guess you are assuming the use of convection reflow for your lead free application when you mention "how many ...

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