After my first year at Columbia University as a PhD student, I did a summer internship at Western Digital wafer fabrication facility at Fremont, CA. For 3 months, I worked on the development of new generation magnetic recording technology, HAMR: Head-Assisted Magnetic Recording. I cannot provide much detail, but it was such an eye opening experience to work at a company with 70k+ employees and see how a product was first born in research, they perfected through development, and finally move on to manufacturing.
My role was integration and fabrication engineer, and I worked with an R&D team to come up with clever ways for wafer fabrication.
WD Campus in Milpitas, CA (unfortunately I did not get to spend much time there, but it looks really nice!)