Ricoh Company, Ltd.

Adv Antest Corporation

Teletech Co., Ltd.

Akio Kojima

Masayuki Shoshi

Masao Yoshikawa

Tetsuro Suzuki

Kiyofumi Nagai

Masayuki Koyano

Masato Igarashi

Akiko Konishi

Takanori Tsuyuki

Hiroyuki Mochizuki

Megumi Kawahara

Ikuko Tanaka

Masakatsu Shimoda

Ikuko Yamada

Masaomi Sasaki

Masafumi Ohta

Akiko Bannai

Hitoshi Arita

Kaoru Teramura

Hiroyuki Takahashi

Kiyoshi Sakai

Mitsuru Hashimoto

Katsumi Kojima

Kyoji Tsutsui

Toshiyuki Kiyokawa

Takeo Yamaguchi

Yoshikazu Kaneko

Isamu Shibata

Noriyuki Igarashi

Tomio Kubota

Ryohei Miyake

Masahiro Taniucchi

Katsunari Ohta

Kazuo Ootake

An object of the present invention is to provide solder bumps sufficiently satisfying the expected functions and having a small diameter which conventional methods cannot attain, a semiconductor device on which these bumps are mounted, and a bump transferring sheet. The present invention provides a method for forming the bumps, which includes forming a solder alloy material layer and flux material layer one by one on an intermediate metallic layer formed on an external electrode pad in a semiconductor device, and then fusing these layers, wherein each of the solder alloy material layer and flux material layer is formed by a liquid spraying method (e.g., ink jetting method).

Solder alloy material layer composition, electroconductive and adhesive composition, flux material layer composition, solder ball transferring sheet, bump and bump forming process, and semiconductore device

An object of the present invention is to provide an electrophotographic photoconductor for liquid development, having high resistance to a carrier solvent for use in a liquid developing method and having practically high sensitivity, an image-forming apparatus including the photoconductor, and an image forming method. To achieve this object, the present invention provides an electrophotographic photoconductor for liquid development including a support, and a photosensitive layer on or above the support, wherein the photosensitive layer includes a charge-generating material, a charge-transporting material, and an acceptor compound, and the charge-transporting material includes a charge-transporting polymer having a specified structure.

Electrophotographic photoconductor for liquid development, image forming apparatus having the same, and image forming method

A probe card on which micro probe needles are arranged at high density and with high precision without need of a complicated structure or variation in needle height. A probe cardinstalled in a wafer tester includes a boardhaving a wiring pattern for transmitting a test signal to be impressed on a wafer under test, a built-up boardformed on the surface of the board, a comb-shaped silicon-made probe needlearranged on the built-up boardand connected to the surface wiring pattern, and a flat portionformed by plating on the surface wiring patternon the built-up boardand having a surface flattened by polishing. The probe needleis loaded on the flat portionand thus mounted on the board

Flat portions of a probe card flattened to have same vertical level with one another by compensating the unevenness of a substrate and each identical height needle being mounted on the corresponding flat portion through an adhesive

Solder alloy material layer composition, electroconductive and adhesive composition, flux material layer composition, solder ball transferring sheet, bump and bump forming process, and semiconductor device

An object of the present invention is to provide a user even at a place away from a racecourse with computer graphic horses having existing past data therein, and also with real time data, and thereby a hitting ratio of simulated finishing orders of racing horses is drastically improved. The racing horses to start a horse race are expressed by means of computer graphics, the existing past data associated with the racing horses is retrieved into the computer graphic horses, and a virtual horse race is started on a display screen, so that a finishing order of the horse race can be predicted according to an action and a result of the virtual horse race.

Virtual horseracing system

A probe card which comes in contact with electrodes of electric components so as to test characteristics of the electric components, includes: a printed board having a plurality of first transmission lines; a build-upboard, attached on the printed board, which includes a plurality of second transmission lines connected to a plurality of the first transmission lines, respectively; and a plurality of probe needles connected to a plurality of the second transmission lines so as to come in contact with the electrodes of the electric components. A method of manufacturing such a probe card includes: forming a first transmission line in a first substrate; superposing a second substrate on the first substrate; forming a second transmission line to the second substrate; cutting the first and second substrates in a predetermined shape; and forming a probe needle on the second substrate.

Probe card and manufactoring method therefor

An IC chip testing apparatus provided with an IC socket to which an IC chip is brought into electrical contact, a printed circuit board with one terminal which is electrically connected to a terminal of a test head and with another terminal which is electrically connected to a terminal of the IC socket, and a heating element provided at the printed circuit board. The IC chip testing apparatus may be provided with a socket to which an IC chip to be tested is detachably mounted; a socket guide; a chamber opening to which the socket guide is attached so that an IC chip mounting opening of the socket faces inside a chamber which is maintained at a predetermined state less than ordinary temperature; a printed circuit board; and a heating board which is provided around the chamber opening.

IC chip tester with heating element for preventing condensation

An image recording method for forming an image on a recording material includes the steps of (a) applying to a recording material a colorless or light colored image recording acceleration liquid containing a compound which is capable of making insoluble a coloring agent contained in a recording liquid which comprises the coloring agent and a solvent for dispersing or dissolving the coloring agent, and (b) depositing the recording liquid imagewise on the recording material by ejecting the recording liquid in the form of droplets onto the recording material, the image recording acceleration liquid further containing at least one of surfactants represented by any of formulae (1) to (5) as specified in the specification, and an image formation apparatus for carrying out the above image formation method is provided.

Image recording method image recording apparatus and image recording acceleration liquid

An aqueous ink composition contains a colorant and a humectant, and has a surface tension &ggr; of less than 50 mN/m when measured by a maximum bubble pressure method at 25&deg; C., with a bubble frequency &ngr; of the aqueous ink composition being set at less than 1 Hz, and a surface tension &ggr; of more than 40 mN/m when measured by the maximum bubble pressure method at 25&deg; C., with the bubble frequency &ngr; of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Aqueous ink compositions and ink-jet printing method using the same

A set of color ink compositions for ink-jet printing includes yellow, magenta and cyan ink composition, each of which having water, a water-soluble coloring agent, a wetting agent, a surfactant and an antiseptic and mildewproofing agent, and the yellow ink composition has the lightness index L* of 95.+-.5 and the chromaticness indices a* and b* of respectively -6.+-.5 and 23 .+-.12, the magenta ink composition has the lightness index L* of 75.+-.5 and the chromaticness indices a* and b* of respectively 55.+-.25 and -28.+-.10, and the cyan ink composition has the lightness index L* of 87.+-.5 and the chromaticness indices a* and b* of respectively -35.+-.10 and -19.+-.8. Further, color ink images are formed on a recording material with a Stockigt sizing degree of 10 sec or more using the above set of color ink compositions and a printing head with a plurality of ink-ejecting orifices by performing dot printing on the recording material by ejecting the ink compositions from the ink-ejecting orifices with the printing head scanned over the recording material a plurality of times.

Set of color ink compositions for ink-jet printing and method of forming

An optically anisotropic recording medium and a method of recording and erasing method using the recording medium are disclosed, which comprises the steps of applying heat or light to the recording medium which comprises a recording layer made of optically anisotropic organic thin-film-shaped crystals to raise the temperature of an organic material or which comprises the optically anisotropic organic thin-film-shaped crystals to a recording temperature at which the crystals are fused, performing partial changing of the crystalline state of the crystals by rapidly cooling the recording layer, thereby recording information in the recording layer; and heating the recording layer to an erasing temperature which is lower than the recording temperature, at which the crystals are not fused, but the molecules thereof can be thermally moved.

Optically anisotropic recording medium and method of recording and

An image recording method for forming an image on a recording material, using a recording liquid which contains a coloring agent and a solvent in which the coloring agent is dispersed or dissolved, includes the steps of applying to a recording material a colorless or light colored image recording acceleration liquid containing a surfactant and a viscosity-increasing compound capable of increasing the viscosity of the recording liquid, and depositing the recording liquid imagewise on the recording material by ejecting the recording liquid in the form of droplets onto the recording material, and an image recording apparatus for carrying out the above image recording method is provided.

Image recording method, image recording apparatus and image recording

An aqueous ink composition contains a colorant and a humectant, and has a surface tension .gamma. of less than 50 mN/m when measured by a maximum bubble pressure method at 25.degree. C., with a bubble frequency .nu. of the aqueous ink composition being set at less than 1 Hz, and a surface tension .gamma. of more than 40 mN/m when measured by the maximum bubble pressure method at 25.degree. C., with the bubble frequency .nu. of the aqueous ink composition being set at more than 5 Hz. In addition, an ink-jet printing method for forming ink images on an image-receiving medium has the step of ejecting the above-mentioned aqueous ink composition in the form of droplets according to the recording signals at a recording frequency of 8 kHz or more.

Aqueous ink composition and ink-jet printing method using the same

A recording ink composition contains a colorant which is soluble or dispersible in water and includes at least one phthalocyanine compound of formula (1) which may have a halogen atom as a substituent and at least one of phthalocyanine compounds of formulas (2) and (3); a dispersant which includes at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and/or at least one surfactant having an alkyl group having 5 or more carbon atoms; water; and a humectant. In addition, images with a resolution of 10 dots/mm.times.10 dots/mm or more can be recorded on an image receiving medium by ejecting the above-mentioned recording ink composition in the form of droplets by the application of thermal or mechanical energy thereto onto an image receiving medium with a Stockigt size degree of 3 seconds or more, with the recording ink composition being deposited in an amount of 20 pl/mm.sup.2 to 200 pl/mm.sup.2 on the image receiving medium.

Recording ink composition and recording method using the same

A recording ink composition includes a colorant comprising a pigment which is soluble or dispersible in water, and a polymeric dye having a weight average molecular weight in a range of 5,000 to 15,000, a dispersant including at least one dispersant component selected from the group consisting of at least one polymeric compound having a hydrophilic moiety and a hydrophobic moiety, and/or at least one surfactant having an alkyl group having 5 or more carbon atoms, water, and a water-soluble organic solvent, and a method of recording images on an image receiving medium is performed, using the recording ink composition.

Growing community of inventors

Tokyo, Japan

Akio Kojima