Intel says the cost/transistor decreased at 14nm: Cost per transistor slide
Samsung says their cost/transistor increased at 14nm: Link
The article also states costs will rise (vs. 28nm) going forward. Developing 28nm SOI is their response.
I couldn't find anything solid about TSMC at 16nm, but one article suggested that like Samsung, using a 20nm metallization at 16nm means TSMC's cost per transistor will go up.
My take: Intel's apparent advantage at 14nm in cost per transistor should have driven an increase in foundry business, but that doesn't seem to be happening. So I guess Samsung or TSMC retain an overall lower cost per transistor at 14/16nm, albeit with Intel taking a stride toward narrowing that advantage.
Samsung says their cost/transistor increased at 14nm: Link
The article also states costs will rise (vs. 28nm) going forward. Developing 28nm SOI is their response.
I couldn't find anything solid about TSMC at 16nm, but one article suggested that like Samsung, using a 20nm metallization at 16nm means TSMC's cost per transistor will go up.
My take: Intel's apparent advantage at 14nm in cost per transistor should have driven an increase in foundry business, but that doesn't seem to be happening. So I guess Samsung or TSMC retain an overall lower cost per transistor at 14/16nm, albeit with Intel taking a stride toward narrowing that advantage.