Referral from friend. Total process took 2 months. 2 weeks for the phone interview. Questions are standard, short channel effects and breakdown mechanisms. 2 weeks later for full day interview. The first interviewer didn't show up. He showed up at the end, and pushed the everything one hour later. Extremely unprofessional. Took 1 more month before before results were given.

I got an email from hiring manager directly that he wants to interview me. After a week interview was fixed. He asked me basic device physics questions with few tricky ones. He was good enough to explain the problems so that I can answer. Hiring manager told me that HR will get back to me in 7-10 days which never happened. I found that unprofessional.