Applied online through for the position and was contacted by a recruiter about a month later saying that they wanted to do an oncampus first round interview. The interview was with a ME and was mostly technical with a couple questions like "why microsoft" etc. Heard back later in the week that they wanted to fly me up to Seattle for a final round interview. They flew me out and I had 4 interviews in 4 hours (1 hour each) all morning. All of the interviews were mostly the same (about 30 minutes of technical questions and 30 minutes for personality questions and my own questions about Microsoft). Pretty standard mechanics of materials and thermal design questions

Got a first round interview with a recruiter from a university recruiting fair (behavioral interview). Mostly just 'why Microsoft' and asked about my background/resume. Then got asked to fly out to Seattle (Redmond Campus) for onsite. There was an optional pre-meet dinner with current Microsoft employees. It was basically a big networking event and actually got to meet some of the employees that would interview me the next day. Was on the campus from 10-5. From 10-1, we had lunch and a lab tour. From 1-4 we had scheduled 45 minute technical interviews.