Gen2 DLC is the new system in slider which expects to reduce DLC thickness sigma by 50%. It's also processed with the new etch recipe to provide a planar TE topography, expect PWP (writer pole) to reduce from 7-8A to 5A level, so thinner DLC will help to compensate for ET performance loss. There are 3 groups of DLC thickness for this eval, POR 22A, eval 20A and 18A. They will build into drive and will be tested for burnish performance as part of qualification.