Never heard of FR410. Sure you don't mean IS410? http://www.isola-group.com/en/products/name/detail.shtml?18 -Bob --- alan smith wrote: > Anyone know of a white paper or other tech document > that describes the differences between PCB material > FR408 and FR410 ? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist