The ATLAS Insertable B-Layer project

The ATLAS experiment will upgrade its Pixel Detector with the \ninstallation of a new pixel layer in 2013-14. The new sub-detector, \nnamed Insertable B-layer (IBL), will be installed between the existing \nPixel Detector and a new smaller radius beam-pipe at a radius of 3.3 cm.\nTo cope with the high radiation and pixel occupancy due to the \nproximity to the interaction point, a new read-out chip and two \ndifferent silicon sensor technologies (planar and 3D) have been developed.\nFurthermore, the physics performance should be improved through the \nreduction of pixel size while targeting for a low material budget \nshould be imposed, pushing for a new mechanical support using \nlightweight staves and a CO2 based cooling system.\nAn overview of the IBL project and the status of the production of \nstaves and the qualification of the assembly procedure, \nthe loaded module electrical integrity and the \nread-out chain will be presented.