Quote:IBM has announced it has signed an agreement with Samsung Foundry to produce its next-generation processors. This includes processors for IBM Power Systems, IBM z, and LinuxONE systems, all using Samsung’s 7 nm fabrication process that uses extreme ultraviolet lithography (EUVL). The decision comes as no surprise as GlobalFoundries, IBM’s manufacturing partner for CPUs, decided to abandon development of 7 nm and more advanced technologies. IBM and Globalfroundies manufacturing agreement, whereby fabs, IP, and $$ were given to GlobalFoundries to make IBM's CPUs, ends this month.

IBM and Samsung have collaborated for 15 years researching and developing various semiconductor production materials and technologies as part of IBM’s Research Alliance. Considering the fact that Samsung’s and GlobalFoundries’ fabrication processes rely on R&D conducted internally and as part of IBM’s Research Alliance, IBM developers know what to expect from these technologies. IBM said that under the current agreement, the two companies will expand and extend the strategic partnership, but did not elaborate whether this means development of a custom version of Samsung’s 7LPP manufacturing process for IBM. At present, the companies call the tech to be used for IBM’s chips as “7 nm EUV”.

IBM has traditionally used custom manufacturing processes to build its IBM POWER processors for servers and IBM z CPUs for mission-critical mainframes. IBM’s chips combine a high core count and complexity with very high frequencies, which is why the company required highly-custom process technologies that relied on SOI wafers, featured an increased amount of metal layers, a reduced transistor density, and other adjustments. Typically, technologies fine-tuned for IBM CPUs by IBM Microelectronics and then GlobalFoundries were only used for these products (partly because of IP and partly because of costs).

Full reading: https://www.anandtech.com/show/13740/ibm-samsungs-7nm-euv-power-z-cpu