All-printed piezoelectric sensor embedded in organic coatings on sheet steel
Sprache des Vortragstitels:
Microelectronic Systems Symposium 2016
Sprache des Tagungstitel:
Piezoelectric materials are, in general, divided into three classes. The first category comprises single crystalline materials, like, e.g., quartz or gallium phosphate. Materials of this group are intrinsically ferroelectric, i.e., they inhibit a piezoelectric as well as a pyroelectric effect. These materials are usually cut or etched and then plated with electrodes. The second category of ferroelectric materials are ceramics like, e.g., lead zirconate titanate (PZT) or barium titanate (BaTiO3) They all have a perovskite crystal structure and are created with in sintering based process. Electrical contacts are, in general, either vapor deposited, or coated with conductive material. The third material class includes ferroelectric polymers. One of these polymers is poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)]. The main advantage of polymer based ferroelectric materials is their printability. This property facilitates numerous new applications like, e.g., flexible transparent PET films with embedded pyroelectric and piezoelectric functionality.
In this work, the application of printed piezoelectric sensor stacks on polymer coated sheet steel is discussed. This is potentially of interest for industrial application as sheet steel is a well understood, robust and widely used material that has not yet been functionalized with integrated sensors (in commercial products).
For this purpose, a screen printing ?technology?, combined with a setup to polarize the samples with a hysteresis poling procedure, has been developed and an all printed piezoelectric sensor on polymer coated sheet steel has been realized.