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article
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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...
http://www.polarinstruments.com/support/stackup/AP521.html
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company
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Polar Instruments Inc.
Polar Instruments is a world leader in the design of innovative tools for PCB design and fabrication. We have an enviable reputation for technical excellence and customer focus. Supported through a global network of technical centers in Asia, Europe and the USA, Polar technology is in daily use by both large and small electronics companies worldwide, simplifying traditionally complex tasks resulting in improved productivity and faster time...
http://www.polarinstruments.com/
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