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Masahiro Takiyama, Kunihiro Miyazaki, Kenichiro Shiozawa: Polishing pad for semiconductor wafers. Showa Denko Kabushiki Kaisha, Chiyoda Kaushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas, September 4, 1990: US04954141 (111 worldwide citation)

A polishing pad for a semiconductor wafer, which pad is made of a foamed fluorine-contained resin sheet and is highly resistant to a corrosive polishing solution such as bromine-methanol system or bromine-methanol-silica powder system.


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Takashi Udagawa: Group-III nitride semiconductor light-emitting device. Showa Denko Kabushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas PLLC, November 28, 2000: US06153894 (100 worldwide citation)

Light-emitting device with excellent emission intensity is difficult to obtain when gallium indium nitride with high indium composition ratio and poor crystallinity is employed as active layer for group-III nitride light-emitting device to emit a comparatively long wavelength light. The invention pr ...


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Yoichi Hirose: Process for synthesis of diamond by CVD. Showa Denko Kabushiki Kaisha, Sughrue Mion Zinn Macpeak and Seas, March 28, 1989: US04816286 (98 worldwide citation)

A synthesizing process for diamond by the chemical vapor phase growth method, characterized by converting an organic compound containing carbon, hydrogen and at least one of oxygen and nitrogen, to a gas phase, mixing the gas with hydrogen gas, decomposing the mixed gas by an energy of heat, electro ...


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Junichiro Washiyama, Chikara Aoyama, Tetsuo Yasuda: Heat-resistant resin composition. Showa Denko Kabushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas, February 19, 1991: US04994515 (79 worldwide citation)

A resin composition comprising (A) at least one heat-resistant resin, (B) at least one thermoplastic resin, (C) an antimony oxide, (D) at least one bromine-containing reaction product selected from the group consisting of (1) a compound having a molecular weight of from 1,200 to 6,000 and a bromine ...


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Tokiji Takahashi: Alumina abrasive grains and method for manufacturing the same. Showa Denko Kabushiki Kaisha, Kane Dalsimer Kane Sullivan and Kurucz, February 24, 1981: US04252544 (74 worldwide citation)

Alumina abrasive grains having a density of more than 3.75 g/cm.sup.3 and a hardness (Knoop) higher than 1,900 Kg/mm.sup.2 are disclosed as useful in manufacturing a grinding wheel with which sharp grinding is carried out under heavy loads. The grains are characterized in that the grain structure th ...


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Mikio Yamashita, Takuzo Sato, Yoshio Noguchi, Yoshinobu Uchibori, Akio Shinohara, Hiroshi Soga, Sadayuki Miyazaki: Method and apparatus for discriminating minute particles. Agency of Industrial Science and Technology, Showa Denko Kabushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas, October 18, 1988: US04778593 (63 worldwide citation)

In order to discriminate minute particles such as biological particles or organic polymers, a suspension of minute particles is formed into a particle stream with the individual particles substantially separated from each other, the particle stream is irradiated with a high-intensity light beam, the ...


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Kasai Juichi, Miyazaki Kazuo, Kawasaki Keiji, Kawase Buntaro: Method and article for removing mercury from gases contaminated therewith. Showa Denko Kabushiki Kaisha, Fitzpatrick Cella Harper & Scinto, April 8, 1975: US3876393 (58 worldwide citation)

Mercury is removed from gases contaminated therewith by passing the gases in contact with activated carbon which has been impregnated with sulfuric acid. Carbon impregnation by soaking in a sulfuric acid solution and drying at preferred temperatures as well as mercury adsorption at preferred tempera ...


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Toshiyuki Sakai, Masao Kobayashi: Highly conductive polymer composition and process for producing the same. Showa Denko Kabushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas, June 12, 1990: US04933106 (49 worldwide citation)

A highly conductive polymer composition can be obtained by doping a neutralized conductive polymer having a .pi.-electron conjugated structure with an anionic polymer electrolyte. The conductive polymer composition is stable for a long period of time, and the content of the dopant in the polymer com ...


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Kazumi Naito: Capacitor. Showa Denko Kabushiki Kaisha, Sughrue Mion Zinn Macpeak & Seas PLLC, September 5, 2000: US06115235 (48 worldwide citation)

In a capacitor comprising a pair of electrodes and a dielectric substance intervening between the two electrodes, one of the electrodes is composed of sintered niobium nitride. Preferably, the dielectric substance is composed of niobium oxide and the electrode other than the electrode composed of si ...