Ngk Insulators, Inc.

Seiko Epson Corporation

Other

Masato Komazawa

Yukihisa Takeuchi

Koji Kimura

Tsutomu Nanataki

Yukihisa Takuchi

Shinsuke Yano

Takaaki Koizumi

Hajime Nakao

Manabu Munakata

Tetsuya Hatta

Tomohiro Yamada

Takatoshi Nehagi

Toshihisa Mizutani

A liquid-jet head includes: a plurality of individual passages communicating with nozzle orifices that jet liquid; a manifold communicating with the plurality of individual passages, in which a surface of the manifold on the liquid-jetting face side is sealed with a sealing member; and a rib provided in the manifold on the sealing member side.

Liquid-jet head and liquid-jet apparatus

In an inspecting method of a piezoelectric/electrostrictive actuator having a piezoelectric/electrostrictive element and two or more electrodes, the frequency response characteristics is picked up when a vibration is given to the piezoelectric/electrostrictive actuator, and the amount of displacement of the piezoelectric/electrostrictive actuator is predicted by the frequency response characteristics. The piezoelectric/electrostrictive actuator is precisely inspected without dissolution and destruction and without actual driving as a product.

Inspecting method of elastic body, inspecting apparatus thereof, and dimension predicting program thereof

A piezoelectric/electrostrictive device (P/E) includes driving, movable and fixing portions. One end of a first P/E element and P/E operating portion on the end are positioned on the fixing portion and an opposite end of the P/E operating portion of the first P/E element is positioned on a first thin plate portion. One end of a second P/E element and P/E operating portion on the end are positioned on the movable portion and an opposite end of the P/E operating portion of the second P/E element is positioned on a second thin plate portion. A hole formed by inner walls of the driving, movable and fixing portions has a central axis that extends in an axial direction substantially parallel to the thin plate portions and substantially perpendicular to the length direction, and the device is free of any other holes extending in any direction other than the axial direction.

Piezoelectric/electrostrictive device

Provided is a piezoelectric/electrostrictive device comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated based on a drive of the driving portion, and a fixing portion for holding the driving portion and the movable portion, the fixing portion and the movable portions being coupled via the driving portion, and a hole being formed by an inner wall of the driving portion, inner wall of the movable portion, and inner walls of the fixing portion. The driving portion comprises a pair of mutually opposing thin plate portions and at least two piezoelectric/electrostrictive elements each comprising at least one or more pairs of electrodes and a piezoelectric/electrostrictive layer provided on the thin plate portions.

A piezoelectric/electrostrictive device is disclosed comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated by a drive of the driving portion, a fixing portion for holding the driving portion and the movable portion, the movable portion being coupled with the fixing portion via the driving portion, and a hole formed by inner walls of the driving portion, an inner wall of the movable portion, and an inner wall of the fixing portion. The driving portion comprises a pair of mutually opposing thin plate portions, and a piezoelectric/electrostrictive element including a piezoelectric/electrostrictive operating portion comprising at least a pair or more of electrodes and a piezoelectric/electrostrictive layer formed on at least a part of the outer surface of at least one thin plate portion out of the thin plate portions, one end of the piezoelectric/electrostrictive operating portion in a direction in which the fixing portion is connected with the movable portion exists on the fixing portion or the movable portion, and the other end of the piezoelectric/electrostrictive operating portion is arranged on the thin plate portion, and at least a piezoelectric/electrostrictive layer of the piezoelectric/electrostrictive element exists extending over the movable portion and the fixing portion. The device of the present invention, having high rigidity in the width direction of the thin plate portions, namely in the Y-axis direction, enables rigid joining when functional parts such as sensors, magnetic heads, or the like are fixed to the present device, and further when the present device per se is fixed to another structure.

A piezoelectric/electrostrictive actuator including a ceramic substrate, and at least one piezoelectric/electrostrictive actuator unit formed on at least a portion of at least one surface of the substrate, each piezoelectric/electrostrictive actuator unit having a first electrode film, a piezoelectric/electrostrictive film and a second electrode film which are laminated in the order of description, with the piezoelectric/electrostrictive actuator unit formed on the substrate by heat treatment.

Piezoelectric/electrostrictive actuator having at least one piezoelectric/electrostrictive film

A piezoelectric/electrostrictive device includes a driving portion, a movable portion and a fixing portion. The driving portion includes a pair of mutually opposing thin plate portions and a piezoelectric/electrostrictive (P/E) element. A P/E operating portion of the P/E element is arranged on at least a part of an outer surface of at least one of the thin plate portions, such that one end thereof exists on the fixing portion or the movable portion and the other end thereof is arranged on the thin plate portion. At least one end of a P/E layer of the P/E element exists on the fixing portion or the movable portion, and the other end is arranged on the thin plate portion.

Piezoelectric/electrostrictive device having mutually opposing thin plate portions

A piezoelectric/electrostrictive device including a driving portion, a movable portion, a fixing portion for holding the driving portion and the movable portion, the movable portion being coupled with the fixing portion via the driving portion, and a hole formed by inner walls of the driving portion, movable portion, and fixing portion. The driving portion includes a pair of mutually opposing thin plate portions and a piezoelectric/electrostrictive (P/E) element. A P/E operating portion of the P/E element is arranged on at least a part of an outer surface of at least one of the thin plate portions, such that one end thereof exists on the fixing portion or the movable portion and the other end thereof is arranged on the thin plate portion. At least one end of a P/E layer of the P/E element exists on the fixing portion or the movable portion, and the other end is arranged on the thin plate portion. The Young's modulus Y of a material composing the thin plate portions and the Young's modulus Y of a material composing the P/E layer have a relationship satisfying 1<Y /Y &lE;20.

Provided is a piezoelectric/electrostrictive device comprising a driving portion to be driven by a displacement of a piezoelectric/electrostrictive element, a movable portion to be operated based on a drive of the driving portion, and a fixing portion for holding the driving portion and the movable portion, the fixing portion and the movable portions being coupled via the driving portion, and a hole being formed by an inner wall of the driving portion, inner wall of the movable portion, and inner walls of the fixing portion.

Piezoelectric/Electrostrictive device

A method for polarization treatment of a piezoelectric/electrostrictive film type chip, comprising: providing a piezoelectric/electrostrictive film type chip comprising a plurality of piezoelectric/electro-strictive film type elements each having a piezoelec-tric/electrostrictive section constituted by a thin diaphragm, a lower electrode formed on the diaphragm, a piezoelectric/electrostrictive layer formed on the lower electrode, and an upper electrode formed on the piezoelectric/electrostrictive layer, dividing the plurality of piezoelectric/electrostrictive film type elements into two or more element groups, and subjecting each element group to a polarization treatment. The chip after the polarization treatment is low in dielectric breakdown and can be used as a reliable piezoelectric/electrostrictive film type chip.

Method for polarization treatment of piezoelectric/electrostrictive film type chip

Piezoelectric/electrostrictive actuator having at least one

A piezoelectric/electrostrictive actuator comprising a substrate, a plurality of electrodes in the form of strips formed on at least one surface of the substrate such that the electrode strips are spaced from each other in a direction parallel to the substrate surface, and a piezoelectric/electrostrictive portion which is disposed between the adjacent strips of the electrodes in the spacing direction, and in contact with the adjacent electrode strips, so that the piezoelectric/electrostrictive portion produces a flexural displacement or force due to at least the longitudinal mode of converse piezoelectric or electrostrictive effect upon application of a voltage between the adjacent electrode strips.

Growing community of inventors

Nagoya, Japan

Masato Komazawa