Spintronics is an emerging discipline which consists in using the spin of the electron in addition to its charge to conceive innovative devices for electronics. Magnetic Tunnel Junctions (MTJs) are the basic elements of the Magnetic Random Access Memories (MRAM).They can also be used to improve the performances of logic circuits and to push forward the incoming limits of microelectronics. To design hybrid CMOS/magnetic circuits, it is necessary to be able to integrate these new devices in the classical design suites of microelectronics. We present a full hybrid Process Design Kit (PDK), allowing designing circuits containing MTJs together with classical CMOS devices.