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Lead zirconate titanate nanoscale patterning by ultraviolet-based lithography lift-off technique for
Samuel Guillon1, Daisuke Saya, Laurent Mazenq
1Laboratoire d’Analyse et d’Architecture des Systèmes–Centre National de la Recherche Scientifiqueu, Toulouse, France.
Abstract:
The advantage of using lead zirconate titanate (PbZr(0.54)Ti(0.46)O(3)) ceramics as an active material in nanoelectromechanical systems (NEMS) comes from its relatively high piezoelectric coefficients. However, its integration within a technological process is limited by the difficulty of structuring this material with submicrometer resolution at the wafer scale. In this work, we develop a specific patterning method based on optical lithography coupled with a dual-layer resist process. The main objective is to obtain sub-micrometer features by lifting off a 100-nm-thick PZT layer while preserving the material's piezoelectric properties. A subsequent result of the developed method is the ability to stack several layers with a lateral resolution of few tens of nanometers, which is mandatory for the fabrication of NEMS with integrated actuation and read-out capabilities.
