Abstract:
A seed layer having a predetermined pattern is formed on a side of one surface of a second substrate, and a ferroelectric layer is formed on the side of said one surface of the second substrate. A lower electrode is formed on the ferroelectric layer, and the lower electrode and a first substrate are bonded via a bonding layer. A laser beam with a predetermined wavelength is irradiated from a side of other surface of the second substrate to transfer a ferroelectric film, which overlaps with the seed layer, of the ferroelectric layer and the seed layer onto the side of said one surface of the first substrate. The laser beam is a beam with a wavelength, herein the beam passes through the second substrate, and is reflected by the seed layer, and moreover is absorbed by a second portion of the ferroelectric layer. The second portion does not overlap with the seed layer.
Abstract:
A ferroelectric device comprises: a silicon substrate (a first substrate) 10; a lower electrode (a first electrode) 14a formed on one surface side of first substrate 10; a ferroelectric film 14b formed on a surface of lower electrode 14a opposite to first substrate 10 side; and an upper electrode (a second electrode) 14c formed on a surface of ferroelectric film 14b opposite to lower electrode 14a side. The ferroelectric film 14b is formed of a ferroelectric material with a lattice constant difference from silicon. The ferroelectric device further comprises a shock absorbing layer 14d formed of a material with better lattice matching with ferroelectric film 14b than silicon and provided directly below the lower electrode 14a. The first substrate 10 is provided with a cavity 10a that exposes a surface of shock absorbing layer 14d opposite to lower electrode 14a side.
Abstract:
A vibration power generation element includes a base substrate having a support portion and a cantilever portion, and a power generation unit for generating alternating current power in response to vibration of the cantilever portion. The power generation unit includes: a lower electrode formed on one surface side of the base substrate so as to overlap the cantilever portion; a first piezoelectric layer formed on an opposite side of the lower electrode from the cantilever portion; an intermediate electrode formed on an opposite side of the first piezoelectric layer from the lower electrode; a second piezoelectric layer formed on an opposite side of the intermediate electrode from the first piezoelectric layer; and an upper electrode formed on an opposite side of the second piezoelectric layer from the intermediate electrode.
Abstract:
Providing a power generating device that can output higher power as well as downsize the device, and providing a power generating module using the same. The power generating device 1 has a power generating section 20 that includes a piezoelectric body 21; and a plurality of electrode pairs each constituted by a pair of electrodes (22, 23) that are placed on opposite sides of the piezoelectric body 21 with regard to a thickness direction thereof to define a functional section 21a therebetween, each of the functional sections 21a is cooperated with the related electrode pair (22, 23) to define a power generating element 200. A plurality of the power generating elements 200 includes a first power generating element 201 and a second power generating element 202 configured to give a polarization orientation opposite to each other in the thickness direction. The first and second power generating elements (201, 202) are configured to have the corresponding electrodes (22, 22) that are connected to each other by means of a wiring member 24 on the same surface of the piezoelectric body 21 with regard to the thickness direction thereof, such that all of the plurality of the power generating elements 200 are connected in series.