Hi, We are considering a layer stackup which uses Cores with uneven Copper foil thickness. Copper on one side is 1/2 oz and on the other side is 2 oz. Apart from the availability/cost considerations are there other issues with using such a Core. I will appreciate the opinions of experts on this. Thanks. Regards Ravinder Ajmani Principal HW Engineer, Signal Integrity / EMI HGST, a Western Digital company [log in to unmask] ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________