Growth of BST thin films on silicon substrates.: Application to integrated capacitors for DC-DC converters

Capacitor structures aiming at filtering and decoupling capacitors for DC-DC conversion, based on BST thin films, were deposited by PLD on silicon substrates. The selection of the appropriate buffer layers and of a perovskite bottom electrode allowed the achievement of capacitor structures with the (100) texture. The specific capacitance values were measured on BaTiO3 films grown on an YBCO bottom electrode around 80 nF/mm(2). The achievement of a (100) textured Sr(NbxTi1-x)O-y bottom electrode with a resistivity of around 100 mu Omega cm holds promise of large specific capacitance values in combination with low resistive losses.