Canon Kabushiki Kaisha

Oki Electric Industry Co., Ltd.

Eastman-Kodak Company

Other

Tokyo Gas Company Limited

Ricoh Company, Ltd.

Masahiro Itoh

Masato Tanaka

Koichi Sato

Kenichiro Waki

Kenichi Takeda

Akira Watanabe

Masamoto Nakazawa

Yasuo Katano

Masashi Watanabe

Atsushi Takeda

Hiroshi Kubo

Naoki Nakamura

Yuji Sakemi

Ryo Inoue

Hiroyuki Suzuki

Kazuo Kishino

Shigenobu Hirano

Hiroaki Tsuchiya

Kimio Nakahata

Hideo Kawamoto

Yoshiaki Nagao

Masahiro Inoue

Yukio Nagase

Yoshifumi Sudoh

Kazuhisa Kemmochi

Kenji Kameyama

Jiro Ishizuka

Takeshi Menjo

Satoshi Yamashita

Hiroshi Satomura

Yasuo Nami

Ayumu Hashimoto

Hiroki Shirado

Takeo Yamamoto

Hajime Tsukahara

Yoshihiro Murasawa

Tadaaki Oyama

Aino Hasegawa

Satomi Tanaka

Tatsuya Ozaki

Susumu Momma

Atsushi Munakata

Atsushi Sugai

Hiroshi Kawarada

Norikazu Igarashi

Kimiharu Yanagisawa

Tomohiko Ono

Masayuki Kuwabara

Takeo Tsunemi

Yuuki Nakada

Shun Okazaki

Shiori Ohsugi

Masataka Itoh

Naofumi Nakamura

Toru Obuchi

A semiconductor device employable as a capacitor has a conductive pillar arranged in an opening produced in an insulator layer produced on a semiconductor substrate, the conductive pillar being connected with a conductive region of the semiconductor substrate and being surrounded by a dielectric cylinder which is further surrounded by a conductive cylinder which extends onto the surface of the semiconductor substrate, whereby allowing a large amount of capacity, regardless of the horizontal area of the semiconductor device. A semiconductor memory cell of the one transistor and one capacitor structure has a capacitor which has a conductive pillar arranged in an opening produced in an insulator layer produced on a semiconductor substrate, the conductive pillar being connected with a conductive region of the semiconductor substrate and being surrounded by a dielectric cylinder which is further surrounded by a conductive cylinder which extends onto the surface of the semiconductor substrate, whereby a large magnitude of integration is readily realized.

Method of making a transistor and capacitor structure with a conductive

An image forming apparatus, such as a copying machine, has a fixing device for fixing a developer image transferred to a transfer medium, such as paper, with a fixing roller whose surface is coated with a release agent, such as oil, and includes at least one feed passage member for conveying, while contacting, a transfer medium to a transfer region of the apparatus. The feed passage member has a release agent absorbing layer on the surface thereof, and is thus advantageous for preventing release agent from being transferred and adhered to a photo-sensitive drum of the apparatus. The release agent absorbing layer of the feed passage member may contain either porous particles or particles and a binder resin, and be formed on another layer for retaining release agent absorbed by the release agent absorbing layer. The feed passage member preferably constitutes a transfer medium carrying member, which may include a dielectric sheet, for supporting and carrying a transfer medium. The member may alternatively constitute a pick-up roller, a feed guide, and/or a resist roller of the apparatus.

Method for forming an image by absorbing a release agent using a release

An image forming apparatus includes a charging device applies a voltage to charge an image bearing member. The charging device is provided with a charging means to which a voltage is applicable to charge said image bearing member, said charging means being provided with a magnetic particle carrying member for carrying and conveying a magnetic particle layer contacting with said image bearing member during the charging operation; a container contains magnetic particles therein; and a replacing device replaces the magnetic particles carried on the magnetic particle carrying member with the magnetic particles contained in the container. A developer develops a latent image produced on the image bearing member by the charging device using a toner to produce a toner image. A transferring device transfers the toner image from the image bearing member simultaneously with developing of the latent image without using a cleaner member after transferring by said transferring device and before charging by said charging device.

Charging device and image forming apparatus

A semiconductor device employable as a capacitor has a conductive pillar arranged in an opening produced in an insulator layer produced on a semiconductor substrate, the conductive pillar being connected with a conductive region of the semiconductor substrate and being surrounded by a dielectric cylinder which is further surrounded by a conductive cylinder which extends onto the surface of the semiconductor substrate, thereby allowing a capacity, regardless of the horizontal area of the semiconductor device. A semiconductor memory cell of the one transistor and one capacitor structure has a capacitor which has a conductive pillar arranged in an opening produced in an insulator layer produced on a semiconductor substrate, the conductive pillar being connected with a conductive region of the semiconductor substrate and being surrounded by a dielectric cylinder which is further surrounded by a conductive cylinder which extends onto the surface of the semiconductor substrate, whereby a large magnitude of integration is readily realized.

Dram-capacitor structure

An image forming apparatus includes image bearing member for bearing a toner image; charging member contactable to the image bearing member to electrically charge the image bearing member; wherein .delta.V=.vertline.Vdc-Vs.vertline. is different between a first area of the image bearing member which is going to be image area and second area of the image bearing member which is going to be non-image area, where Vdc is a DC component of a voltage applied to the charging member, and Vs is is a potential of the image bearing member charged by the charging member.

Image forming apparatus

An image forming apparatus includes an electrostatic image bearing member for bearing an electrostatic image; a developer carrying member for carrying developer containing toner; a voltage source for applying to said developer carrying member, an oscillating voltage of a predetermined frequency: a toner image forming device for forming a toner image on said electrostatic image bearing member using said voltage source; a transferring device for transferring the toner image onto transfer material; and a removing device for removing, using said voltage source, the toner remaining on said electrostatic image bearing member after the use of said transferring device: the voltage satisfies: ##EQU1## V.sub.pp �V!: peak-to-peak voltage of oscillating voltage V.sub.f �Hz!: frequency of oscillating voltage

Image forming apparatus which applies oscillating voltage to developer

An image forming apparatus includes at least a first image-forming unit provided with a first latent image-holding member, a first latent image-forming device, a first developing device for developing a first latent image with a first toner to form a first toner image, and a first image-transfer device for transferring the first toner image to an image-receiving member, and a second image-forming unit provided with a second latent image-holding member, a second latent image-forming device, a second developing device for developing a second latent image with a second toner to form a second toner image, and a second image-transfer device for transferring the second toner image to the image-receiving member holding the first toner image. The second developing device also serves as a cleaning device for recovering the toner remaining on the second latent image-holding member after the transfer to perform cleaning. The second latent image-holding member has a surface having a contact angle for water of not less than 85.degree..

Image-forming apparatus featuring a plurality of image forming means

A diamond semiconductor device having at least one MESFET integrated on a single diamond substrate and insulated from other semiconductor elements is made by preparing a homoepitaxial diamond film 1 having a hydrogen-terminated surface; then making a drain ohmic contact 3, a source ohmic contact 4, both of gold, and a gate electrode 5 of aluminum on the film 1; and changing a site of the hydrogen-terminated surface other than the site for the MESFET to be terminated with atoms other than hydrogen atoms.

Element-isolated hydrogen-terminated diamond semiconductor device and

An image forming apparatus has a plurality of image forming units for forming, on an image receiving member such as a transfer sheet, toner images of a plurality of different colors such as magenta, cyan, yellow and black. Each of the image forming units includes a photosensitive drum serving as an image carrier, a developing device for developing an electrostatic latent image carried by the image carrier to form a color toner image, and a transfer device for transferring the toner image to the image receiving member. The developing device in the image forming unit for forming on the image receiving member the toner image of an (i+1)-th color is of the type capable of simultaneously performing both development and removal of residual toner. The transfer currents T.sub.i and T.sub.i+1 employed by the transfer units which perform transfer of the toner images of an i-th color and the (i+1)-th color satisfy the following condition (1). The sphericity factor SF of the toner used in at least one of the image forming units, defined by the following equation (2) satisfies the following condition (3):

An image forming apparatus wherein a laser beam produced by a laser source is imaged through an imaging optical system on an image bearing member as a beam spot. The beam spot scans the image bearing member in a main scan direction. The laser source is rendered on and off to form an image with picture elements. The laser driving pulse width per picture element is changed in accordance with the image density of the image to be formed, so that the tone gradation of the image is provided on the image bearing member in accordance with the pulse width. The size of the spot measured in the main scan direction (1/e.sup.2 diameter) is not more than 0.7 times of the size of the picture element measured in the main scan direction.

A developing apparatus having a supporting frame for supporting plural developing units. The supporting frame is movable to present a selected one of the developing units to a development operating position. The supporting frame is provided with positioning members for positioning the developing units. The positioning members are fixed on the movable frame in the manner that the position of the positioning member is adjustable. Each of the developing units is faced to an image bearing member at the operating position without contact to the image bearing member.

Image forming apparatus with a plurity of adjustable developing units

A developing apparatus for developing electrostatic images comprises a container for containing a developer comprising magnetic material. A rotatable member is provided which is rotatable in the container in contact with the developer, the rotatable member being supported on bearings. A stationary magnetic member is disposed out of position inside the container and adjacent to the bearing with a clearance from the rotatable member, the stationary member enclosing the rotatable member. The stationary member has first and second magnetic poles disposed adjacent to each other and having the same magnetic polarity to form a repelling magnetic field to form a magnetic brush of the developer in a clearance between the magnetic member and the rotatable member.

Magnetic seal for a developing apparatus

A developing apparatus is provided with a container for containing a developer having magnetic particles. A rotatable member is rotatable in contact with the developer in the container. The rotatable member is supported in the container by a bearing. A magnetic member encloses at least a portion of the rotatable member at a position adjacent to the bearing. The rotatable member comprises a ferromagnetic material disposed at least at a portion facing the magnetic member. The ferromagnetic material is magnetized by the magnetic member, and a magnetic field formed between the magnetic member and the ferromagnetic material forms a magnetic brush of the developer between the magnet member and the rotatable member.

Magnetic seal for preventing developer from leaking out of the

A light-emitting diode print head having a narrow LED array chip wherein the constituent LEDs of the array are arranged in a zigzag formation and driven using a differential timing arrangement that compensates for the offset of alternate LEDs in the printing line. The LED array comprises a plurality of light-emitting elements arrayed in a staggered configuration of odd and even numbered elements in parallel rows extending in a first, print line direction and a plurality of electrodes connected to the corresponding light-emitting elements and arranged in a mutually alternating orientation extending between the parallel rows at right-angles to the first direction and forming parallel rows of odd and even numbered electrode terminals interleaved between the even and odd numbered light-emitting elements, respectively.

Light-emitting diode print head with staggered electrodes

A light emitting diode (LED) print head with a high-density print capability is achieved through an arrangement that produces high-density connections between an LED array and associated LED drivers. The LED array and LED drivers are mounted on a system board. A lens array that focuses light from the LED array onto a remote printing surface is attached to a lens array frame. Formed on at least one mounting leg of the lens array frame are metal contacts that correspond in number to the number of associated LED array and LED driver electrodes to be interconnected. When the lens array is mounted on the LED array and LED drivers, the metal contacts bridge the space between the associated LED and LED driver electrodes and thereby connect the associated electrodes of the LED array and the LED drivers in the same operation.

Light-emitting diode print head

Growing community of inventors

Tokyo, Japan

Masahiro Itoh