Chip maker SK Hynix announces $4B plant in Purdue University research park

“ We believe this project will lay the foundation for a new Silicon Heartland, a semiconductor ecosystem centered in the Midwest Triangle”

Has anyone heard of the “Midwest Triangle” before? Some internet searching doesn’t come up with anything. I know that the Purdue campus is less than 100 miles from the UIUC campus, I wonder if these are two of the points. But what would be the third? UChicago? UMich?