It's interesting to see that they are using Samsung's 7nm process. I thought that, apart from the work they do for Apple, Samsung kept their high-end fabbing mostly to themselves.
Samsung, Glofo and IBM were members of the Common Platform. My ex-roommate used to work at IBM Upstate where they trained Samsung engineers.
Apple moved to TSMC in Taiwan not too long after Tim Cook appeared on CBS claiming that the engines of their mobile devices were made in US, almost 6-7 years ago. Apple's share of Samsung's production isn't probably much these days. But they are still #2 behind TSMC and Samsung also announced recently that they are investing $100B for next 10 years in logic business which includes their foundry.
Apple and Samsung had been partner for a long time. Some iPods and iPhone, iPhone 3G, 3GS use Samsung arm processor. Apple A4 to A7 is made by Samsung too.
But A8 is made by TSMC, A9 has two versions, APL0898 by Samsung, APL1022 by TSMC. There were some debates on which one is better.
