Designer's guide for Printed Circuit Board tolerances
PCBs are made from materials that will stretch, shrink, twist and bow. The most common material in general use is FR4. During the manufacturing process the laminates will be exposed to temperatures that will exceed their glass transition point (Tg) as well as many chemical processes.
With this in mind this note provides some general guidance on tolerances for PCBs.
Board Thickness The standard thickness of a PCB is normally around 1.6mm...
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10/19/2009