Nippon Carbide Kogyo Kabushiki Kaisha

Tdk Corporation

Ebara Corporation

Tdk Electronics Company, Limited

Masanori Sasaki

Hiroshi Shibafuchi

Yasushi Imai

Masahiko Yoshida

Takehiko Yoshie

Isao Yokoyama

Kenichiro Saito

Takashi Mitsuya

Tsutomu Maeda

Masahiro Murotani

Akihiro Yazawa

Kenichi Ishii

Sumio Takahashi

Seiji Watabe

Hidenori Nitta

Hajime Mura

Yotaro Toyoshima

Kazuyoshi Miyata

A polishing apparatus detects the escape of a substrate from a top ring during polishing. The polishing apparatus includes a polishing table having a polishing pad, a top ring, and a substrate escape detection section for detecting escape of the substrate from the top ring. The detection section includes a light irradiation member for irradiating an area of the upper surface of the polishing pad with light, a controller for controlling the light irradiation of the light irradiation member, an image-taking member for taking an image of the area irradiated with the light, and an information processing member for processing information outputted from the image-taking member. The controller controls the light irradiation member in such a manner that it performs light irradiation at least for a period of time during which the substrate is regarded as being in contact with the polishing pad.

Polishing apparatus and substrate processing method

A method for producing 3-amino-5-mercapto-1,2,4-triazole, useful as an intermediate compound for a medicine or pesticide, or the intermediate thereof, a salt of N-guanidino thiourea from aminoguanidine thiocyanate or a thiocyanate and an aminoguanidine compound in the presence of an acid in a polar solvent, or even from hydrazine and cyanamide is disclosed.

Processes for producing a salt of N-guanidino thiourea and

Alkali metal azide particles most of which have a nearly spherical shape and take a spongy structure and whose volume average particle size ratio in the ultrasonic dispersion treatment is desirously 0.4 or less. Since self-decomposition characteristics of the alkali metal azide particles according to this invention are quite mild, they can be simply handled in large amounts and are quite useful as a gas generating agent for an automobile air bag.

Alkali metal azide particles

The method of producing an alkali metal azide involves reaction of hydrazine with an alkyl nitrite in a solvent in the presence of an alkali metal hydroxide. As the solvent is used as aqueous solvent and the reaction ratio of hydrazine is controlled within the range between 50% and 90%. The method can produce with high purities and in high yields alkali metal azides useful as a raw material for the preparation of tetrazoles which can be used as an intermediate material for medicines, as a raw material for the preparation of organic azides useful for light sensitive materials for photo masks employed in the field of electronics industries, or as a major raw material for inflaters used in air bags for cars.

Method of producing alkali metal azides

A process for producing cyanamide from lime nitrogen, which comprises dispersing lime nitrogen in an organic liquid containing an aliphatic alcohol having 1 to 3 carbon atoms, and blowing carbon dioxide gas into the dispersion.

Process for producing cyanamide

An electromagnetic deflection-distortion corrector comprises a plurality of permanent magnets arranged around the tubular wall of a CRT display unit of the electromagnetic deflection type, and adjuster means for moving each permanent magnet forward and backward, toward and away from the CRT wall, while at the same time rotating the direction of its magnetization.

Electromagnetic deflection-distortion corrector

A small sized reception antenna for VHF and/or UHF band for the use in a room has been found. The antenna has a horizontal dipole type first antenna portion having a folded elongated conductor, and a vertical second antenna portion having a ferrite pole electromagnetically coupled with said horizontal first antenna portion. Said horizontal first antenna portion is rotatable in a horizontal plane, while the second antenna portion is fixed vertically. A tank circuit with a tank coil wound on the ferrite pole and a variable capacitor is provided to resonate the antenna with the reception frequency. An output coil is wound on the ferrite pole, and said output coil provides the output signal of the present antenna. Means for sliding the output coil along the ferrite pole is provided to adjust the output impedance of the present antenna for each of the reception frequencies.

Combined dipole and ferrite antenna

Growing community of inventors

Tokyo, Japan

Masanori Sasaki