I applied through Intel career portal, had two telephonic interviews (1hr duration). First was mail about resume details and few fundamental questions in physical design second was about projects and device characteristics and properties, device physics

There were two rounds of phone interviews. First one lasted for 45 min with basic technical questions. I got the result of first round on the same day. And the second round lasted for 3 hours with 3 people calling me every hour with 10 min breaks in between. Second round was also completely technical with three of them asking completely different questions.