What the heck is Apple making in this fab? I only ever read about them using other fabs.
Actually, it is all about IBM technology(FD-SOI), knowledge(Engineers), and capacity. And selling the whole Fab to GloFo. Apple wanted good GPUs for their computers.
AMD have had WSA(Wafer Supply Agreement) with GloFo, but their technology was rubbish compared to TSMC, and it appears it might still be. There is however this FD-SOI technology that allows for scaling down the transistors while lowering the leakage, and maintaining the very high clocks. GloFo has right now the technology, knowledge, etc to bring it to market.
AMD has fab and technology(Polaris) that can be pipe cleaner of WSA. Apple can consume most of deliveries of Polaris chips.
IBM is happy because they do not need to feed the fabs.
GloFo is happy because they can grow in technology, revenue, and mindshare.
AMD is happy because they can get more revenue, do not loose money on WSA, and whats more - get some money from WSA.
For me it looks like quite good business for all of the parties. And the news about Samsung producing chips for AMD, because of the needs of some partner(Polaris chips are produced and designed on the same process for both Samsung and GloFo) adds to whole picture.
Now lets wait for what is about to happen.