I'd rather say Capex is financed by operating cash flow (or financing cash flow in case of raising debt or equity).
Do you have any proof for that? As far as I know, Samsung doesn't disclose this. In addition, there are still some synergies between memory and logic semiconductor production. I know it is not the same but it isn't fully orthogonal either.
I said this a few times already: They can capitalize a big part of their R&D spending for process technology and it is paid through depreciation. It makes sense in this case, since the expenses have more a character of an investment than an expense. R&D for TSMC has been around 1.5 billion in 2014. That basically makes things worse, since that fully adds to Capex for process spending.
Ok, I checked that. Last fiscal year it has been at around 14 billion. My twelve billion were wrong because the Taiwan Dollar depreciated since then. If you have a look at TSMC's quarterly operating cash flows you can see that it actually was 20% lower than 9 months before - not a nice trend that I can see here.
I didn't say they can't afford it. They can't afford to outspend Samsung and Intel. That's a fact you seem to ignore.
If you're asking me, the future of the high end smartphone market will be lower margins. We'll see.