Tdk Corporation

Anelva Corporation

Nec Corporation

Ube Industries, Inc.

Toto Ltd.

Ube Nitto Kasei Co., Ltd.

Anelva Co.

Masami Sasaki

Minoru Takaya

Toshikazu Endo

Hisashi Kobuke

Sumio Mori

Takashi Kikukawa

Kenichi Kawabata

Hisayuki Abe

Masahiro Shinkai

Hajime Kuwajima

Hiroki Hara

Motohiro Nakahara

Koichi Arishima

Toshiyuki Abe

Yasumi Sago

Seiji Samukawa

Kazuhiko Itoh

Toshiyasu Fujiwara

Tetsuo Kitabayashi

Hiroto Shimokawa

Takashi Kajino

Hiroshige Ohkawa

Yoshikazu Tsuya

Akira Suda

Naoto Ohyama

Yasuyoshi Suzuki

Ryohei Fukuzaki

Takuro Kochiyama

Jun Miyagi

Atsushi Obara

Hideki Masuda

Tetsuo Miya

Hiroshige Okawa

Shuji Tachi

Yoshitaka Mineki

Seiji Takahara

Yasuhiro Suzuki

Eiji Fujiyama

A first disclosure is an optical fiber member equipped with two holding members that hold an optical fiber such that an end surface of the optical fiber is located on one end and a curving portion having a coat of the optical fiber is curved to be extended at another end; the holding members are provided with holding flat portions that sandwich an end portion of the optical fiber where the coat is removed such that the end surface of the optical fiber is located on the one end; at least any of the holding flat portions has an aligning groove to fix a position of the end portion of the optical fiber; the holding member is provided with a curved surface at a position adjacent to the curving portion in the extending direction D; and the two holding members are equal in thermal expansion coefficient.

Optical fiber member and optical fiber holder

A directional coupler according to the present invention includes a primary line for transmitting a transmission signal; an input port for inputting the transmission signal to the primary line; an output port for outputting the transmission signal from the primary line; a secondary line for electromagnetically coupling with the primary line to extract part of the transmission signal; a coupling port provided at one end of the secondary line; an isolation port provided at the other end of the secondary line; and a low pass filter unit having a function of low pass filter, disposed between the secondary line and the coupling port.

Directional coupler and wireless communication device

A method for producing a flexible metal laminate includes continuously thermocompression-bonding laminate metal foils to a resin film. The thermocompression-bonding step is conducted by placing a protection metal foil between a pressure surface of a heat and pressure forming apparatus and the laminate metal foils. When the protection metal foil is subjected to an abrasion resistance test, in which the protection metal foil is placed such that a matte surface of the protection metal foil contacts a plate material having a surface equivalent to the pressure surface and in which the matte surface is rubbed against the surface of the plate material by applying a load to a shiny surface of the protection metal foil and pulling the protection metal foil, a streak is found on the matte surface only in a case where the load is over 500 g per area of 76 mm&#xd7;26 mm.

Method for producing flexible metal laminate

A core material-including organic core board or inorganic sintered boardhaving a plurality of band-shaped conductor patternsformed on its front and rear surfaces is sliced in a direction crossing the band-shaped conductor patterns. End portions of the band-shaped conductor patternsexposed on each of cut surfaces of the core boardare connected to one another by bridging conductor patterns formed on the cut surfaces. In this manner, at least one helical coil is provided. The inner diameter of the helical coil can be kept constant while coil pitch accuracy can be kept good.

Inductive device and method for producing the same

A composite dielectric material comprising a resin resulting from a polyvinylbenzyl ether compound and a dielectric ceramic powder dispersed therein is useful in the high-frequency region. A composite magnetic material comprising a polyvinylbenzyl ether compound and a magnetic powder is also provided as well as a flame retardant material comprising a polyvinylbenzyl ether compound and a flame retardant. These materials may be used in the fabrication of substrates, prepreg sheets, coated metal foils, molded items, and metal foil-clad substrates.

COMPOSITE DIELECTRIC MATERIAL, COMPOSITE DIELECTRIC SUBSTRATE, PREPREG, COATED METAL FOIL, MOLDED SHEET, COMPOSITE MAGNETIC SUBSTRATE, SUBSTRATE, DOUBLE SIDE METAL FOIL-CLAD SUBSTRATE, FLAME RETARDANT SUBSTRATE, POLYVINYLBENZYL ETHER RESIN COMPOSITION, THERMOSETTIN

This invention has an object of providing a method for producing a multilayer substrate or an electronic part wherein decrease in the thickness has been enabled without causing the problem of insufficient strength or the like in the handling, as well as the electronic part. Such object has been attained by a method for producing a multilayer substrate or an electronic part comprising the steps of adhering a conductor layer to a transfer film, patterning the conductor layer to form a predetermined pattern, placing the transfer film overlaid with the patterned conductor layer on a prepreg so that the side of the conductor layer faces the prepreg, and then adhering the transfer film to the prepreg by applying heat and pressure and peeling the transfer film to produce the prepreg having the conductor layer formed thereon; and the multilayer electronic part produced by such method.

Method for producing multilayer substrate and electronic part, and multilayer electronic part

The invention provides a nonmagnetic ceramic comprising 5% to 40% by weight of .alpha.-quartz and 5% to 60% by weigth of zinc silicate dispersed in 35% to 75% by weight of borosilicate glass as a matrix, the borosilicate glass having SiO.sub.2 and B.sub.2 O.sub.3 contents: SiO.sub.2 =70 to 90% by weight and B.sub.2 O.sub.3 =10 to 30% by weight. Using the nonmagnetic ceramic, multilayer ceramic inductors are obtained. When the ceramic is used as ceramic multilayer parts having an inductor section, it has a low dielectric constant and good characteristics in the high-frequency region, allows for low-temperature firing enabling the use of silver electrodes, prevents chip deformation and crack occurrence upon sintering, and provides a higher mechanical strength.

Non-magnetic ceramics and ceramic multilayer parts

An electrostatic chuck for electrostatically clamping a semiconductor wafer while minimizing any plane temperature difference thereof has a dielectric layer joined to a metal plate and an inner electrode disposed in the di-electric layer. The dielectric layer has a raised outer rim disposed on an upper surface thereof along an outer peripheral edge thereof, and a plurality of protrusions disposed on the upper surface radially inwardly of the outer rim, the protrusions having upper surfaces for clamping the semiconductor wafer in direct contact therewith. The volume resistivity of the dielectric layer is 10.sup.9 .OMEGA.m or less, and Rmax (maximum height) of the clamping surfaces of the protrusions 5 is 2.0 .mu.m or less and or Ra (center-line average roughness) thereof is 0.25 .mu.m or less. The ratio of the total area of the clamping surfaces of the protrusions to the entire area of the upper surface of the dielectric layer is equal to or greater than 1% and less than 10%.

Electrostastic chuck

A microwave plasma etching method and apparatus for manufacturing electronic devices such as transistors. The method includes the steps of forming a stream of plasma from a processing gas within a plasma formation chamber by using an electric field produced by a microwave and an electron cyclotron resonance phenomenon produced by a magnetic field perpendicular to the electric field, and processing a substrate surface by locating it at the electron cyclotron resonance point and exposing it to a radiation of the plasma stream. The apparatus has a plasma formation chamber, a microwave introducing device connected to the plasma formation chamber, a magnetic field applying device for producing a magnetic field perpendicular to an electric field produced within the plasma formation chamber, and a gas introducing system for introducing a processing gas into the plasma formation chamber. A substrate holder is provided within the plasma formation chamber for holding a substrate at a resonance point of the electron cyclotron resonance phenomenon exhibited by the introduced microwave and applied magnetic field where the magnetic field has a particular strength.

Microwave plasma etching method and apparatus

A microwave plasma treatment apparatus comprises a plurality of auxiliary magnets arranged around the periphery of a plasma formation chamber. A plurality of auxiliary magnets are disposed along the circumference of the plasma formation chamber while a plurality of auxiliary magnets may also be arranged in the axial direction of the plasma formation chamber. Also, the magnetic poles of every auxiliary magnet are respectively reverse in polarity to the adjoining magnetic poles of an auxiliary magnet(s) disposed adjacent thereto either along the circumference of the plasma formation chamber or in the axial direction thereof. This enables the whole high-density plasma to be substantially uniform throughout the inside of the plasma formation chamber.

Microwave plasma treatment apparatus

Growing community of inventors

Tokyo, Japan

Masami Sasaki