Kabushiki Kaisha Toshiba

Masayuki Nakamoto

Tomio Ono

Tadashi Sakai

Kouichi Ichimura

Hiromichi Ohashi

Katsuyoshi Fukuda

Masayuki Saito

Haruhiko Okumura

Goh Itoh

Yumi Fukuda

Hitoshi Nagato

Masahiko Yamamoto

Hitoshi Kobayashi

Hideyuki Nakao

Yujiro Hara

Shuzo Hirahara

Takahiro Ikeda

Masao Obama

Makoto Ochiai

Hisao Fujiwara

Teruo Murakami

Miki Mori

Hirokazu Karasawa

Hiroshi Masumoto

Atsuo Inoue

Taiji Hirasawa

Toshimichi Hasegawa

An ultrasonograph, an ultrasonic transducer, an inspection device, and an ultrasonic imaging device enabling easy and quick inspection and high-resolution or high-speed processing are provided. Barium titanate (BaTiO) or lead zirconate titanate (PZT) is used for a piezoelectric material constituting the ultrasonic transducer, and the thickness thereof is 0.1 &#x3bc;m to 100 &#x3bc;m. Included therein are a drive section capable of driving an arbitrary one of piezoelectric layers, a detecting section detecting electrical signals generated by the plural piezoelectric layers based on echoes from an inspection object, the echoes being originated from an ultrasonic wave generated by the driven piezoelectric layer, and a processing section performing processing for visualizing a state of the inspection object based on the detected electrical signals.

Ultrasonograph, ultrasonic transducer, examining instrument, and ultrasonographing device

A field emission cold cathode device of a lateral type includes a cathode electrode and gate electrode disposed on a major surface of a support substrate laterally side by side. The cathode electrode and gate electrode have side surfaces which oppose each other, and an emitter is disposed on the opposite side surface of the cathode electrode. The emitter includes a metal plating layer formed on the cathode electrode, and a plurality of granular or rod-shaped micro-bodies. The micro-bodies are consisting essentially of a material selected from the group consisting of fullerenes, carbon nanotubes, graphite, a material with a low work function, a material with a negative electron affinity, and a metal material, and are supported in the metal plating layer in a dispersed state.

Field emission cold cathode device of lateral type

A method of manufacturing a field emission device having emitter shapes, comprise the steps of forming a first original plate having a major surface provided with emitter shapes, by cutting a surface portion of a base material, forming a first material layer on the major surface of the first original plate on which the emitter shapes are provided; separating the first material layer from the first original plate, thereby obtaining a second original plate having recesses onto which the emitter shapes on the first original plate are transferred, forming a second material layer on a major surface of the second original plate on which the recesses are provided; and separating the second material layer from the second original plate, thereby to obtain a substrate having projections portions onto which shapes of the recesses of the second original plate are transferred.

Method of manufacturing field emission device and display apparatus

A field emission type cold cathode device comprises a substrate, and a metal plating layer formed on the substrate, the metal plating layer contains at least one carbon structure selected from a group of fullerenes and carbon nanotubes, the carbon structure is stuck out from the metal plating layer and a part of the carbon structure is buried in the metal plating layer.

Field emission type cold cathode device, manufacturing method thereof and vacuum micro device

Field emision type cold cathode device, manufacturing method thereof and vacuum micro device

There is provided a field emission type display which is capable of suppressing deterioration of image quality which otherwise occurs due to stepwise cuts and to the increase of wiring resistance caused by a thin width of a cathode line and which causes less failures. The display includes a plurality of cathode lines having an equal line width within the pixel and is structurally based on a multiple gradation representing a scheme of controlling spatial gradation display by changing the number of field emission type emitters to be driven by changing the number of cathode lines to be selected.

Field emission type display

In a field emission cold-cathode device, a cathode line or electrode is arranged on a glass substrate. An emitter is arranged on the cathode electrode and is formed of a conductive layer, a low-work-function material layer, and a tip layer stacked one on top of the other in this order. The emitter has a pyramid shape in which the tip layer has a sharp tip. The low-work-function material layer is made of a material having a work function of 4.0 eV or less. The tip layer is made of a material having a negative electron affinity and formed of granular bodies or linear bodies each having a diameter of 100 nm or less.

Field emission cold-cathode device

A field emission cathode having an emitter provided with a sharp point for emission of electrons and a controlling gate electrode is composed of a supporting substrate, an emitter material layer formed of an emitter material, superposed on and attached fast to the supporting substrate, and provided with an emitter hole, an insulator layer so formed on the surface of the emitter material layer as to expose the tip part of the emitter projection therethrough, and an impurity diffusion layer formed on the surface of the insulator layer and enabled to function as an etching stopper layer.

Field emission cathode structure, method for production thereof, and flat panel display device using same

A field emission cold-cathode device includes a support member and a plurality of emitters formed on said support member to emit electrons. Each emitter is made up of a plurality of carbon nanotubes basically constituted by an array of 6-membered rings of carbon. 70% or more of all of the carbon nanotubes have diameters of 30 nm or less. An aspect ratio representing the ratio of the height to the bottom diameter of the carbon nanotube forming the emitter is set at from 3 to 1.times.10.sup.3. The period of the 6-membered rings of carbon in the carbon nanotube is a multiple of 0.426 nm or 0.738 nm.

An ink-jet head and its manufacturing method and an ink-jet recording device, which condense a color component in an ink with the color dissipated in a solvent, and record with the ink flown toward a record medium. A protruded-type electrode and its leading electrode are formed on a supporting substrate. An ink-guide-groove which is formed from the bottom section to the pointed end portion on the wall surface, is provided at the protruded-type electrode. A connected portion by the protruded-type electrode of the leading electrode and an end portion of an opposite portion are exposed outward. A plurality of protruded-type electrodes are provided on the supporting substrate along main scanning direction X. The shape of the protruded-type electrode is pyramid, and its pointed end portion is sharpened. Ink guide grooves are formed on each wall surface of the pyramid of the protruded-type electrode. A width of the ink guide groove becomes narrower as the distance to the pointed end portion decrease from the bottom portion.

Ink-jet head and ink-jet recording device each having a protruded-type

Cathode electrodes in a plurality of rows are arranged parallel with one another on a glass substrate. Very small cold cathodes of conical shape are arranged in matrix on the cathode electrodes. An insulating layer (ITO film) having cylindrical slots surrounding cold cathodes is formed above the glass substrate and the cathode electrodes. Gate electrodes in a plurality of columns are formed on the insulating layer in the direction perpendicular to the extension of the cathode electrodes. An intersection between a cathode electrode and a gate electrode corresponds to a pixel. A glass plate is provided above the gate electrodes. An anode electrode is provided entirely on the surface of the glass plate facing the cold cathodes. A phosphor member for each pixel is formed on the surface of the anode electrode facing the cold cathodes. Thus, the light source for emitting light for each pixel is formed. A well-known liquid crystal display panel for controlling (modulating) an amount of transmission light for each pixel is provided above the light source.

Flat panel display device

A micro-vacuum device comprises a substrates an emitter having a sharp end formed above the substrate, a gate electrode provided above the emitter, and an anode having cooling means provided oppositely to the substrate above the gate electrode.

Micro-vacuum device

A field emission cold-cathode device has a supporting substrate, and an emitter for emitting electrons disposed on the supporting substrate. The supporting substrate is essentially formed of a transparent synthetic resin. The emitter is formed by molding a portion of a conductive material layer such as Au which has been disposed on the supporting substrate into a conical shape. The conductive material layer functions also as a cathode wiring. An engaging concave portion is formed on a surface of the emitter to be bonded with the supporting substrate. In conformity with this engaging concave portion, a convex portion is integrally formed on the supporting substrate so as to be hermetically fitted in the engaging concave portion.

Growing community of inventors

Chigasaki, Japan

Masayuki Nakamoto