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?
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.