Overview and status of ATLAS Pixel Detector

Pixel Detector is the innermost part of the tracking system of ATLAS experiment at the Large Hadron Collider (LHC). It covers about 1.7 m2 with over 80 million pixel cells arranged in 1744 modules. These modules are then arranged in three layers in the barrel part and three disks at each of the two forward regions to get three space-points per track for nearly all tracks within pseudorapidity |η|<2.5. The Pixel Detector is designed to operate at LHC specifications such as 40 MHz bunch crossing frequency, a high particle flux density and an extreme radiation environment. An overview of the project is given, and some of the problems experienced with opto-links are discussed.