You can get the laminate certified to class A, B, C or D.  For 5
core, class A is +/- 1.5 mils.  We typically order class C which is
+/- 0.7 for 5 core.  We find though that most of the laminate falls
within class C regardless of what class you order.

Rick Babyak
Process Engineer
Proto Circuit Inc.
7 Ascot Parkway
Cuyahoga Falls, OH 44223
330-572-3400

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