Patent application number | Description | Published |
20090263671 | Ferroelectric Poly (Vinylidene Fluoride) Film on a Substrate and Method for its Formation - Ferroelectric Poly(vinylidene fluoride) Film on a Substrate and Method for its Formation A method of producing a poly(vinylidene fluoride) (“PVDF”) film on a substrate from a precursor solution is disclosed. The method comprises preparing the precursor solution for the PVDF film and dissolving an additive in the precursor solution, the additive being selected from the group consisting of: a hydrate salt, and a hygroscopic chemical. The PVDF is added to the precursor solution. The PVDF solution is coated on a substrate to form an as-deposited PVDF film which is dried and crystallized at an elevated temperature. The dried and crystallized as-deposited PVDF film is annealed at a further elevated temperature. The further elevated temperature is greater than the elevated temperature but less than a melting point of the as-deposited PVDF film. The additive dehydrates at the further elevated temperature. A corresponding product is also disclosed. | 10-22-2009 |
20100019623 | MICRO-ELECTROMECHANICAL DEVICES AND METHODS OF FABRICATING THEREOF - An electromechanical device includes a support structure formed by attaching inner surfaces of second and third substrates to a first substrate. The support structure includes at least one cavity between the second and third layers. An electromechanical active element is provided on an outer surface of at least one of the second or third layers. | 01-28-2010 |
20100221415 | Thin Films of Ferroelectric Materials and a Method for Preparing Same - Thin films of ferroelectric material with a high mole fraction of Pb(A | 09-02-2010 |
20110081733 | Thin film photovoltaic device - The present invention provides a thin film photovoltaic device and a method of forming a thin film photovoltaic device. The thin film photovoltaic device has a substrate, a thin film layer formed on the substrate and first and second electrodes formed on one side of the thin film layer. By applying an electric field over the first and second electrodes, the thin film layer is polarized in a direction parallel to the surface plane of the film. Upon exposure to light, the thin film layer converts light energy into electricity. According to the method, a thin film layer is formed on a substrate. A first electrode and a second electrode are formed on one side of the thin film layer. By applying an electric field over the first and second electrodes, the thin film layer is polarized in a direction parallel to the surface plane of the film. | 04-07-2011 |
20110084669 | POWER SUPPLY DEVICE AND SYSTEM - A power supply device and system have an electrically polarized element in which a remnant electrical polarization is formed and retained. Electrodes are formed on the electrically polarized elements and the remnant electrical polarization generates an electrical potential on the electrodes. Electrical circuits are coupled to the electrically polarized element to control the external electric charges attracted and distributed on the electrodes, for establishing the electrical potential on the electrodes. The electrodes can output electric currents by controlling the external electric charges distribution. The electrically polarized element may be made of ferroelectric material, including a ferroelectric bulk ceramic, ferroelectric multilayer ceramic, ferroelectric single crystal, ferroelectric thin film, ferroelectric thick film and ferroelectric polymer, and all the other materials with electric polarization retained therein. Power supply devices and systems made according to the present invention have very long standby time, small in size and efficient for many applications including RF systems. | 04-14-2011 |
20110296918 | MINIATURIZED PIEZOELECTRIC ACCELEROMETERS - The miniaturized piezoelectric accelerometer includes a support frame ( | 12-08-2011 |
20120137787 | PIEZOELECTRIC SENSOR AND A METHOD OF FABRICATING A PIEZOELECTRIC SENSOR - A piezoelectric sensor comprising a piezoelectric film formed on a surface of an object to be monitored; a plurality of electrodes formed on a surface of the piezoelectric film; and wherein electrical polarization of the piezoelectric film is about coplanar with the surface of the piezoelectric film. A method of forming a piezoelectric sensor. The method comprises forming a piezoelectric film on a surface of an object to be monitored; forming electrodes on a surface of the piezoelectric film; and orientating electrical polarization in the piezoelectric film to be about coplanar with the surface of the piezoelectric film. | 06-07-2012 |
20120313482 | METHOD OF FORMING A VDF OLIGOMER OR CO-OLIGOMER FILM ON A SUBSTRATE AND AN ELECTRICAL DEVICE COMPRISING THE VDF OLIGOMER OR CO-OLIGOMER FILM ON THE SUBSTRATE - A method of forming a vinylidene fluoride (VDF) oligomer or co-oligomer film on a substrate is disclosed. The method comprises forming a VDF oligomer or co-oligomer precursor solution; depositing the VDF oligomer or co-oligomer precursor solution onto the substrate to form a preliminary VDF oligomer or co-oligomer film on the substrate; and applying uniaxial pressure on the preliminary VDF oligomer or co-oligomer film and the substrate at an elevated temperature to form the VDF oligomer or co-oligomer film on the substrate. The substrate may comprise a metal surface which may be used as a bottom electrode and a top electrode may be deposited on the VDF oligomer or co- oligomer film The VDF oligomer or co-oligomer film, the bottom electrode on the substrate and the top electrode on the VDF oligomer or co-oligomer film form an electrical device. | 12-13-2012 |
20130026382 | PHOTOVOLTAIC UV DETECTOR - A photovoltaic UV detector configured to generate an electrical output under UV irradiation. The photovoltaic UV detector comprises a first layer comprising an electrically polarized dielectric thin layer configured to generate a first electrical output under the UV irradiation; and a second, layer configured to form an electrical energy barrier at an interface between the second layer and the first layer so as to generate a second electrical output under the UV irradiation, the second electrical output having a same polarity as the first electrical output, the electrical output of the photovoltaic UV detector being a sum of at least the first electrical output and the second electrical output. The electrically polarized dielectric thin layer may be a ferroelectric thin film, which may comprise PZT or PZLT. The second layer may be a metal and the electrical energy barrier may be a Schottky barrier. | 01-31-2013 |
20130064970 | METHOD FOR PREPARING A LEAD-FREE PIEZOELECTRIC THIN FILM - The present invention discloses a method of preparing a lead-free piezoelectric thin film comprising the steps of: providing a precursor solution comprising at least one alkali metal ion, a polyamine carboxylic acid, and an amine; depositing the precursor solution on a substrate to form a film; and annealing the film. The present invention also provides a lead-free piezoelectric thin film prepared according to the method, a precursor solution for use in the method and a method of preparing the precursor solution. | 03-14-2013 |
20130188282 | PEIZOELECTRIC ACTUATOR, HEAD GIMBAL ASSEMBLY INCLUDING THE SAME AND METHOD OF FORMING THE SAME - According to embodiments of the present invention, a piezoelectric actuator is provided. The piezoelectric actuator includes a shear mode piezoelectric material including a first arm and a second arm intersecting each other, the shear mode piezoelectric material having a polarization direction oriented at least substantially along a length of the first arm, wherein the shear mode piezoelectric material has a first surface and a second surface opposite to the first surface, the first surface and the second surface being adapted to undergo a shear displacement relative to each other along an axis at least substantially parallel to the polarization direction in response to an electric field applied between the first surface and the second surface in a direction at least substantially perpendicular to the polarization direction. | 07-25-2013 |
20140034815 | SELF-POWERED PHOTODETECTOR AND METHOD OF FABRICATION THEREOF - A self-powered photodetector is provided including: a photovoltaic sensor element for generating an electrical charge under exposure to electromagnetic radiation; a charge storage section for accumulating the electrical charge generated by the photovoltaic sensor element; an electrical load configured to be powered by the accumulated electrical charge from the charge storage section and outputs a signal in response thereto, the signal being analyzable to determine a measurement of the electromagnetic radiation; and a switch for controlling a flow of the accumulated electrical charge from the charge storage section to the electrical load for powering the electrical load. There is also provided a wireless receiver for analyzing a signal from the self-powered photodetector to provide a measurement of the electromagnetic radiation, a photodetector system including the self-powered photodetector and the wireless receiver, and a method of fabricating the self-powered photodetector. | 02-06-2014 |
20140319317 | PHOTO-SENSOR - According to one aspect of the invention, there is provided a photo-sensor comprising: an optically transparent substrate; an electrode pair; and a photoactive film with electrical polarization located between the optically transparent substrate and the electrode pair, wherein the optically transparent substrate is configured to transmit incident radiation received by the optically transparent substrate to the photoactive film and wherein the electrode pair is configured to receive charge carriers generated by the photoactive film in response to the transmitted incident radiation. | 10-30-2014 |