"Is there a significant cost improvement just from 300mm vs 200mm even at the same 90nm"
It depends on what you mean by "significant". It costs more or less the same to process a 300mm wafer as it does a 200mm. Not precisely, but close. The wafers cost more, but out of ~$3k, a wafer might be as much as $300, maybe less. However, you get 2.25 t0 2.5 more raw die per wafer.
So your raw die cost might drop from $10 to $4.
Edit: ok, make that $15 to $7. Assuming 150mm^2 die and a processed wafer cost of $3000. |
