I got a phone interview for this position. The letter mentions it will be all technical problems, including BJT, pn junction, and CMOS. The hiring manager asked very detail on each device, so you must be very familiar with them. The manager will give you some hints if you cannot answer. It takes more than forty minutes on the phone.

Two separate technical phone calls followed by an onsite visit. All technical and very thought-provoking. There are not much advice to give, aside from understanding al about semiconductor devices to a very fundamental level. I was extremely impressed by the quality of the employees there. They are the best, and brightest that you can ask for in term of individuals.