A new cell technology for the scalable BST capacitor using damascene-formed pedestal electrode with a [Pt-Ir] alloy coating

A scalable pedestal cell technology has been successfully developed for the BST capacitor by introducing the damascene scheme into the pedestal electrode formation and by employing [Pt-Ir] alloy for coating the pedestal electrode. With a PVD-BST liner as the blanket nucleating layer and as the barrier layer against the destructive oxidant, the MOCVD-BST functions in prime condition on the storage node developed.