TSMC strikes back with a "retaliatory litigation", claiming that GlobalFoundries infringed on 25 of its patents that include FinFET designs for the 40 through 12 nm nodes. Unlike GlobalFoundries who sued TSMC's fab-less companies like Apple and Nvidia, TSMC is looking to halt all GlobalFoundries production and sale processes for the infringed nodes.
https://www.notebookcheck.net/TSMC-countersues-GlobalFoundries.436708.0.html