They found the really old version of my resume on their database from back when I'd applied for an intern position.
The hour-long phone interview consisted of the standard questions for a EE - inverter transfer curve and the effect of PMOS:NMOS size ratio on the shape, NAND, NOR gate design, clock skew causes and remedies, effect of parasitic capacitances on wires, state machines and state minimazation - K-maps etc. Was also asked to describe class projects, previous internships, and even some puzzles: find the fake (heavier/lighter) ball from 15 using minimum number of measurements on a weighing balance. Always good to read up on recent company products/news to ask intelligent questions about the position, challenges etc.
On-site interview only a week later (that's quicker than usual). My prep concentrated mainly on stuff I studied (and promptly forgot) during my undergrad - digital design, excitation table, computer architecture, c+vhdl+perl programming etc. Breezed through my master's VLSI material just before the interview, turns out I didn't need to revise most of it. Having a contact inside the group I interviewed for and classmates who joined Intel recently helped a lot.
The personal was 5 rounds with different people, of which I found the physical layout/analog design questions the easiest.
will complete later.