The Slate technology is based on 32 sensors (magnetometers) able to track the exact position of your pen, which is enhanced with a magnetic ring (the Ring). The 32 magnetometers track the position, orientation, and tilt angle of the ring in 3D space (x,y,z) with high precision.
HARDSIL process and high temperature
HARDSIL is a manufacturing solution for hardening commercial CMOS integrated circuit components against radiation and high temperature which adds a small amount of processing to a standard flow and does not affect the performance. Also, VORAGO produces a line of high temperature and radiation hardened SRAMs and Microcontrollers.