Nippon Steel Sumitomo Metal Corporation

Nippon Steel Corporation

Nippon Steel & Sumikin Materials Co., Ltd.

Nsc Electron Corporation

Kenichi Uemura

Tadashi Sakon

Takumi Nishimoto

Takashi Iijima

Shinkichi Murakami

Jun Nakatsuka

Hiromitsu Date

Kengo Shimanoe

Eri Hoshiba

Eiichi Kuboyama

Daisuke Sawada

Yoshihiro Mori

Susumu Ohtsuka

Shuji Munehira

Eiki Tsushima

An ultrasonic cleaning equipment () according to the present invention includes a treatment tank () that stores a cleaning liquid that cleans an object to be cleaned and in which the object to be cleaned is immersed; an ultrasonic application mechanism () that applies ultrasonic waves to the cleaning liquid retained in an interior of the treatment tank; and a curved surface member () that is located in a range defined by an angle of inclination from a perpendicular direction in an end portion of a vibrating surface of the ultrasonic application mechanism to an outside with respect to the vibrating surface and that is held on a wall surface and/or a bottom surface of the treatment tank.

Ultrasonic cleaning equipment and ultrasonic cleaning method

A thin-plate-like flexible carbon plate having flexibility, excellent compressive strength, and even electrical conductivity is provided. A carbon plateis a carbon plate having a thickness of 0.05 to 2.0 mm obtained by compression molding of a mixture of (a) 97 to 80 wt % carbon powder composed of 95 to 30 wt % expanded graphite powder and 5 to 70 wt % graphite powder, and (b) 3 to 20 wt % phenolic resin that do not contain ammonia, wherein a compressive strength is 3 MPa or more, a bending strain is 0.6% or more without a crack, and a contact resistance is 6 m&#x3a9;&#xb7;cmor less.

Carbon plate and composite carbon plate

The present invention provides a method of cleaning steel sheet, said method of cleaning steel sheet feeding a cleaning solution activated by ultrasonic waves of a frequency of 0.8 MHz to 3 MHz to a surface of steel sheet at an angle inclined by 1 to 80&#xb0; with respect to a line perpendicular to the surface of the steel sheet in a direction opposite to the running direction, thereby enabling megasonic waves to be applied to cleaning of running steel sheet and improving the cleaning effect and cleaning speed, and a continuous cleaning system of steel sheet.

Method of cleaning steel sheet and continuous cleaning system of steel sheet

The present invention is a method of pickling of steel plate which contains silicon comprising applying ultrasonic waves of at least two types of frequencies of 28.0 kHz or more to less than 1.0 MHz to an acidic cleaning solution which contains microbubbles and, in that state, dipping the steel plate which contains silicon in that cleaning solution. The present invention is a continuous pickling system of steel plate which contains silicon which is provided with at least a support part which supports the steel plate, a conveyor which makes the steel plate move, and a pickling tank which pickles the steel plate, wherein the pickling tank has means for feeding microbubbles and means for applying ultrasonic waves of at least two types of frequencies of 28.0 kHz or more to less than 1.0 MHz.

Pickling method and pickling system of steel plate

A cleaning solution for achieving highly accurate cleaning of silicon semiconductors and silicon oxides. The solution which enables a great reduction in the metal contaminants and the number of fine particles adhered on the surfaces and retention of the hydrophilic property of the surfaces to prevent the surfaces from being unstable, comprising an aqueous acidic solution containing 0.005% by weight or more to less than 0.05% by weight hydrogen fluoride and 0.3% by weight or more to 20.0% by weight or less hydrogen peroxide and having a pH in the range from 1 or more to less than 5.

Solution for cleaning silicon semiconductors and silicon oxides

Growing community of inventors

Tokyo, Japan

Kenichi Uemura