KnC's chips don't stand well here. They just took some fpga desing, converted it to asic with some manufacturer's standard technique, and are going to put as many cores on a die as they can.
So you gather it's a
structured ASIC?
EDIT:
Yes, they themselves state it as such. No, Marcus from KnC said:
"this specific design is standard cell ASIC 28nm" (
https://bitcointalk.org/index.php?topic=232852.msg2468045#msg2468045)
BTW: Optimizing it to get a chip capable of 3 TH/s is of no use, because it would need to take and dissipate 6000-7000 W of power.