  The LHC accelerator complex will be upgraded between 2020-2022, to the
High-Luminosity-LHC, to considerably increase statistics for the various
physics analyses. To operate under these challenging new conditions, and
maintain excellent performance in track reconstruction and vertex location, the
ATLAS pixel detector must be substantially upgraded and a full replacement is
expected. Processing techniques for novel pixel designs are optimised through
characterisation of test structures in a clean room and also through
simulations with Technology Computer Aided Design (TCAD). A method to study
non-perpendicular tracks through a pixel device is discussed. Comparison of
TCAD simulations with Secondary Ion Mass Spectrometry (SIMS) measurements to
investigate the doping profile of structures and validate the simulation
process is also presented.
