The ATLAS upgrade Planar Pixel Sensors (PPS) project aims to
prove the suitability of silicon detectors processed with planar
technology to equip all layers of the pixel vertex detector proposed
for the upgrade of the ATLAS experiment for the future High
Luminosity LHC at CERN (HL-LHC). The detectors need to be
radiation tolerant to the extreme fluences expected to be received
during the experimental lifetime, with optimised geometry for full
coverage and high granularity and affordable in term of cost, due to
the relatively large area of the upgraded ATLAS detector system.
Here several solutions for the detector geometry and results with
radiation hard technologies (n-in-n, n-in-p) are discussed.