Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

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Reflowed Component Placement Tolerance

Gregg

#26060

Reflowed Component Placement Tolerance | 15 October, 2003

We are looking at a design that has an smt led emiter and a corresponding smt detector. After reviewing the tolerance stackup, we need a reflowed placement accuracy of +/-0.25mm(+/-0.010") for each component. Any thoughts/opinions?

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RDR

#26064

Reflowed Component Placement Tolerance | 15 October, 2003

A good pad design along with a capable placement machine should handle this easily. 16mil pitch components need placement accuracy to about .002" so this shouldn't be a big problem to achieve. This placement tolerance is also basically the same as 0402 components.

Russ

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