Fujitsu Corporation

Masaharu Hida

Kazuaki Kurihara

Tsuyoshi Mita

Shigeyoshi Umemiya

Kazunori Yamanaka

Mineharu Tsukada

Masao Kondo

Kenji Maruyama

Koji Omote

Hideki Yamawaki

Kishio Yokouchi

Nobuo Kamehara

Shigenori Aoki

Motoyuki Nishizawa

Hiroshi Kamezaki

Hiroyuki Hyodo

Satoru Watanabe

Tamotsu Yamamoto

Masaki Kurasawa

Yutaka Higashiguchi

Hitoshi Yokemura

Tomochika Kurita

Kenji Homma

Hiroyuki Otaguro

Masao Hosogai

Michinori Kutami

Jyunichi Iwata

A positive electrode material has diffraction peaks at 2θ=13.1°±0.2°, 14.0°±0.2°, and 18.4°±0.2° in X-ray diffraction (2θ=5° to 90°) using synchrotron radiation having a wavelength of 1 Å, has a monoclinic crystal structure belonging to a space group P2/c, and is represented by a composition formula LiCoPO(−0.2≤x≤0.2).

Method of manufacturing positive electrode material

A solid electrolyte including Li, Al, P, O, and N, wherein the solid electrolyte has a POstructure.

Solid electrolyte and all-solid-state battery

A p-type semiconductor block is made of a p-type thermoelectric conversion material, and has a pillar portion and a connection portion laterally protruding from the pillar portion. In addition, an n-type semiconductor block is made of an n-type thermoelectric conversion material, and has a pillar portion and a connection portion laterally protruding from the pillar portion. The p-type semiconductor block and the n-type semiconductor block are alternately arranged in such a way that the connection portion of the p-type semiconductor block is connected with the pillar portion of the n-type semiconductor block and the connection portion of the n-type semiconductor block is connected with the pillar portion of the p-type semiconductor block. The connection portions and tip-end portions of the pillar portions are made of a thermoelectric conversion material containing metal powder.

Thermoelectric conversion module and method of manufacturing the same

P-type semiconductor sheets and n-type semiconductor sheets formed by mixing a powder of semiconductor material, a binder resin, a plasticizer, and a surfactant are prepared. In addition, separator sheets formed by mixing a resin such as PMMA and a plasticizer are prepared. Through holes are formed in each of the separator sheets and then filled with a conductive material. Thereafter, the p-type semiconductor sheet, the separator sheet, the n-type semiconductor sheet and the separator sheet are stacked. The resultant laminated body is cut into a predetermined size and then subjected to a baking process.

Thermoelectric conversion element

An electric power generation device equipped with an apparatus which vibrates and generates heat includes a thermoelectric power generation module and a piezoelectric power generation module which are formed integrally. The thermoelectric power generation module has a first surface combining thermally and mechanically with the apparatus's outer surface and a second surface opposite to the first surface, and generates electric power from temperature differences between the first surface and the second surface caused by the apparatus's generating heat. The piezoelectric power generation module has a fixed end combining mechanically with the apparatus's outer surface and a movable end opposite to the fixed end, and generates electric power from displacement of the movable end to the fixed end caused by the apparatus's vibrating.

Electric power generation device, electric power generation method, and electric power generation device manufacturing method

Method of manufacturing thermoelectric conversion element and thermoelectric conversion element

A coating film is formed on the whole surface area of a body part. Formation of the coating film may be done by immersing the body part in a solution of parfluoropolyether. Then, the parfluoropolyether constituting the coating film is joined with the side surfaces of the body part by irradiating Xenon excimer laser in a nitrogen atmosphere onto the side faces of the body part, or to the surface exposing an electrode layer. As a result, the protective film is formed only on the side surfaces of the body part. Thus, the protective film is formed as a monomolecular film. Total body part is then cleaned by 2,3-dihydrodecafluoropentane to remove non-reacted coating film, thereby completing a multi-layer piezoelectric element.

Piezoelectric element and method for manufacturing the same

Solid material gasification method comprises a solution preparation step wherein a first solid material is dissolved in a solvent to prepare a gasification solution, a solvent removal step wherein a second solid material is separated by removing the solvent used to prepare the gasification solution from that solution, and a solid sublimation step wherein the second solid material is gasified by sublimation.

Solid material gasification method

A microscale driving unit includes first and second elongated piezoelectric actuators extending in antiparallel directions. The base ends of the actuators are fixed to a support member. The tip ends of the actuators are fixed to a driven member. First and second electrically conductive members connect the base end of the first or second elongated piezoelectric actuator to the tip end of the second or first elongated piezoelectric actuator. The microscale driving unit allows utilization of a common single wiring pattern connected to both the base end of the first elongated piezoelectric actuator and the tip end of the second elongated piezoelectric actuator when a driving current is supplied to the first and second elongated piezoelectric actuators. Only a smaller area should be required to locate the wiring pattern. A sufficient planar space can be obtained on the surface of the support member.

Microscale driving unit and recording disk drive

A head assembly includes a suspension having a gimbal, a flexible printed wiring sheet having a plurality of conductor patterns and adhered to the suspension, first and second piezoelectric actuators mounted on the gimbal, and a head slider mounted on the first and second piezoelectric actuators. The first and second piezoelectric actuators are adhered to the gimbal at end portion adhesion portions symmetrical with respect to the center of pivotal motion thereof and are adhered to the head slider at end portion adhesion portions on the opposite side disposed symmetrically with respect to the center of pivotal motion similarly. Consequently, when a voltage is applied to the first and second piezoelectric actuators through the flexible printed wiring sheet, a couple of forces can be generated which vary the posture of the head slider only in one direction around the center of pivotal motion.

Piezoelectric actuator and head assembly using the piezoelectric actuator

The present invention has an object to provide a small, light-weight, impact-resistant, high-accuracy, and low-cost piezoelectric actuator which can achieve a large displacement at a low drive voltage as well as an information storage device which incorporates the piezoelectric actuator and has high recording density. The piezoelectric actuator according to the present invention is equipped with a hinge platewhich has a central portion, two lateral portionsextending point-symmetrically from both ends of the central portion, and two limbsextending point-symmetrically and non-linear symmetrically from both ends of the central portionas well as with a piezoelectric elementwhich brings the two limbstoward and away from each other.

Magnetic disk drive piezoelectric actuator with hinge plate limbs extending non-linear symmetrically from central portion

A micro displacement mechanism minutely displaces an object to be driven. The micro displacement mechanism includes a stationary part and an actuator fixed to the stationary part so as to rotatably support the object to be driven. The actuator includes a pair of piezoelectric actuators attached to opposite side surfaces of said object to be driven, respectively. The pair of piezoelectric actuators are arranged at point symmetric positions with respect to a center of gravity of the object to be driven.

Micro displacement mechanism and magnetic disk apparatus

When wire-bonding process is effected, a head assembly is held between a pair of clamp members. A head slider is urged against a microactuator. The urging force is transmitted to the microactuator through second adhesive layers. Since the second adhesive layers are positioned symmetrically around the rotational axis of the head slider, the urging force tends to act along the rotational axis. The microactuator is simultaneously urged against the support member. The urging force is transmitted from a first adhesive layer to the support member. Since the first adhesive layer extends around the rotational axis, the urging force tends to act along the rotational axis. The head slider is thus allowed to keep a uniform attitude. The microactuator is also allowed to keep a uniform attitude. The microactuator is prevented from suffering from substantial bending stresses.

Head assembly having microactuator

A moving mechanism using a piezoelectric actuator is attached by an adhesive with adhesive parts of a constant area between a piezoelectric element and a slider and between the piezoelectric element and a suspension. A movable part, serving as the slider, is moved by the piezoelectric actuator. A support part, serving as a gimbal part of a suspension, supports the piezoelectric actuator. At least one of the movable part and the support part is fixed to the piezoelectric element. At least one of the piezoelectric element, the movable part and the support part has a bonding surface that is defined by a level difference.

Growing community of inventors

Kawasaki, Japan

Masaharu Hida