Canon Kabushiki Kaisha

Mitsubishi Chemical Corporation

Mitsubishi Kagaku Media Co., Ltd.

Hironobu Mizuno

Shinjiro Okada

Yutaka Inaba

Osamu Taniguchi

Takashi Ohno

Michikazu Horie

Kazuya Miyazaki

Koki Nukanobu

Takashi Iwaki

Masafumi Kyogaku

Haruo Kunitomo

Masae Kubo

Masaaki Mizuno

Hideyuki Kubo

Ken-Ichi Takada

Takeo Tsukamoto

Toshihiko Takeda

Masaaki Shibata

Hiroyuki Hashimoto

Yukio Hanyu

Tadashi Mihara

Katsutoshi Nakamura

Yoshio Hotta

Yasuto Kodera

Yasuhiro Hamamoto

Akira Shimazu

Noritake Suzuki

Tsuyoshi Takegami

Takahiro Horiguchi

Masaharu Naka

Kenichi Takada

An optical information recording medium for recording information by a plurality of record mark lengths, wherein the shortest mark length is at most 0.5 &#x3bc;m, and a crystal state is an unrecorded or erased state and an amorphous state is a recorded state, wherein the erasing is carried out by recrystallization which substantially proceeds by crystal growth from an interface between the amorphous portion or a melt portion and a peripheral crystal portion; and an optical recording method suitable therefore. The medium of the present invention has characteristics that overwriting can be made at a high speed, the jitter of mark edge is small, mark length modulation recording can be made at a high density, and the formed mark is excellent in the stability with the lapse of time.

Optical information recording medium and optical recording method

The present invention provides a method for manufacturing an electron-emitting device, comprising a step for forming a polymer film between a pair of electrodes formed on a substrate, a step for giving conductivity to the polymer film by heating, and a step for providing potential difference between the pair of electrodes.

Method for manufacturing image-forming apparatus involving changing a polymer film into an electroconductive film

In a process of reducing a resistivity of a polymer film for carbonization in a surface conduction electron-emitting device, by irradiating an energy beam onto the polymer film, when an energy intensity of the beam given in a unit area in a unit time is assumed to be W W/m, W satisfies a formula W&#x2267;2&#xd7;T&#xd7;(&#x3c1;&#xb7;C&#xb7;&#x3bb;/&#x3c4;), where T is defined as a temperature &#xb0; C. at which the polymer film is heated for one hour in a vacuum degree of 1&#xd7;10Pa to reduce a resistivity of the polymer film to 0.1 &#x3a9;&#xb7;cm, Cis a specific heat J/kg&#xb7;K of the substrate, &#x3c1;is a specific gravity kg/mof the substrate, &#x3bb;is a heat conductivity W/m&#xb7;K of the substrate, and &#x3c4; is an irradiation time in the range of 10sec to 10 sec.

Methods of manufacturing electron-emitting device, electron source, and image display apparatus

An electron-emitting device having favorable electron emitting characteristic stable for a long time, which is manufactured by a method comprising the steps of disposing an electrically conductive member having a second gap on a substrate, and applying a voltage to the electrically conductive member while irradiating at least the second gap with an electron beam from electron emitting means disposed apart from the electrically conductive member in an atmosphere comprising a carbon compound.

Electron-emitting device, electron source and image-forming apparatus, and manufacturing methods thereof

The present invention provides an electron emitting device including electrodes disposed with a space therebetween on a surface of a substrate, a carbon film disposed between the electrodes and connected to one of the electrodes, and a gap disposed between the carbon film and the other electrode. In the gap, the distance between the edge of the carbon film connected to one of the electrode and the edge of the other electrode at an upper position apart from the surface of the substrate is smaller than that at the surface of the substrate. The present invention also provides an electron source and an image display device each including the electron emitting device.

Electron emitting device, electron source and image display device and methods of manufacturing these devices

The present invention provides a method of manufacturing an electron source which exhibits improved uniformity of electron emitting devices and electron emission properties, and a method of manufacturing an image forming apparatus which exhibits an excellent display quality for a long time. An electron source having a plurality of electron emitting devices is manufactured by disposing a plurality of units, each comprising a pair of electrodes and a polymer film for connecting the electrodes, on a substrate, disposing a plurality of wirings for connection to the pair of electrodes of the plurality of each unit, and decreasing the resistances of all polymer films respectively of the units. A next step includes applying a voltage to films formed by decreasing the resistances of the polymer films, through the wirings, to form a gap in each of the films formed by decreasing the resistance of the polymer films.

Manufacturing methods for electron source and image forming apparatus

In manufacturing surface conduction electron-emitting devices, a polymer thin film is arranged to connect a pair of electrodes and then transformed into a low resistivity film (carbon film) by irradiating the polymer film with an energy beam. The energy beam irradiation is scanned over the polymer films plural times so that heat due to the energy beam irradiation does not affect other members which constitute the device and also the processing time for carbonization of polymer film is reduced.

Method of transforming polymer film into carbon film in electron-emitting device

To provide a method for manufacturing an electron source having electron-emitting devices with excellent electron-emitting property arranged on a substrate and enabling an image-forming apparatus capable of displaying an image with high brightness and uniformity to be enhanced in terms of screen size and production scale. The method for manufacturing the electron source includes a step of disposing a plurality of units and a plurality of wirings connected to the plurality of units on a substrate, each unit including a polymer film and a pair of electrodes with the polymer film interposed therebetween, and a step of forming electron-emitting devices from the plurality of units by repeatedly performing a process including a selecting substep of selecting a desired number of units from the plurality of units, a resistance-reducing substep of reducing resistance of the polymer films of the selected units and a gap-forming substep of forming a gap in each of the films formed by the resistance-reducing substep.

Method for manufacturing electron source and method for manufacturing image display apparatus

A process of efficiently transforming polymer films arranged on an electron source substrate into carbon films is provided. A light is irradiated onto a region of the substrate where a plurality of polymer films, associated electrodes and part of wirings are arranged so that the plurality of polymer films are simultaneously transformed into lower resistance films such as carbon films through heating by the irradiated light, wherein for the irradiating light, a light absorptance of the wirings is lower than that of the electrodes.

Method of transforming polymer films into carbon films

This invention provides an image-forming apparatus manufacturing method capable of simplifying the electron-emitting device forming process and manufacturing a low-cost image-forming apparatus exhibiting high display quality for a long term. A plurality of electrode pairs each formed from electrodes are formed on a first substrate. Polymer films for connecting the electrodes are arranged. Then, the polymer films are irradiated with a laser beam or particle beam to reduce the resistances at least partially and change the polymer films into conductive films containing carbon as a main component. A current is flowed between the electrodes to form gaps in parts of the conductive films. The first substrate, and the second substrate on which an image-forming member is arranged are joined via bonding in a reduced-pressure atmosphere, constituting an image-forming apparatus.

Method of manufacturing image-forming apparatus

An optical phase-change disc comprises a substrate having thereon a spiral groove or concentric grooves for guiding a focused light beam, and a layer structure including a recording layer and protective layers sandwiching therebetween the recording layer. The groove has wobble for recording ATIP (absolute time information) or ADIP (address information). The following relationship between the groove width GW, beam diameter R.sub.0 and wobble amplitude a.sub.w :

Optical phase-change disc

Optical phase-change disc having a grooved substrate, with the groove

Growing community of inventors

Kanagawa, Japan

Hironobu Mizuno