Patents by Inventor Seiichi Watanabe
Seiichi Watanabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20020051306Abstract: The present invention provides a magnetic transfer method for transferring information by bringing a master carrier for magnetic transfer and a slave medium into close contact with each other and by applying a magnetic field for magnetic transfer, said master carrier of magnetic transfer comprising servo areas to be transferred from the master carrier to the slave medium and data areas not to be transferred, both on the same plane.Type: ApplicationFiled: August 31, 2001Publication date: May 2, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Masakazu Nishikawa, Seiichi Watanabe
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Publication number: 20020051307Abstract: The present invention provides a magnetic transfer method for transferring information by bringing a master carrier for magnetic transfer and a slave medium into close contact with each other and by applying a magnetic field for transfer, said master carrier comprising servo areas and data areas, said servo areas are designed on convex form, and difference of height between the data area and the servo area is within the range of 50-800 nm.Type: ApplicationFiled: August 31, 2001Publication date: May 2, 2002Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Masakazu Nishikawa, Seiichi Watanabe
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Publication number: 20020038631Abstract: A plasma processing method and apparatus are proposed that are suited to process the surface of a sample such as a semiconductor device using plasma. The bias voltages to the plasma generation and sample are respectively independently controlled, the RF voltage waveform as the bias voltage to a substrate electrode on which the sample is placed is flattened at an arbitrary voltage level, thereby controlling the energy distribution of ions incident to the sample to be a desired distribution. Therefore, plasma processing can be carried out with high precision.Type: ApplicationFiled: September 6, 2001Publication date: April 4, 2002Inventors: Masahiro Sumiya, Naoki Yasui, Seiichi Watanabe, Hitoshi Tamura
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Publication number: 20020031617Abstract: Processing technique using plasma to process the surface of a sample such as semiconductor device. The phases of RF bias voltages applied to a substrate electrode and an antenna electrode opposed thereto are controlled to be opposite to each other so that either one of the electrodes is forced to always function as ground. Therefore, the current flowing to cross the magnetic field for controlling the plasma is decreased, and the potential distribution difference in the surface of the sample to be processed is reduced, so that the charging damage can be suppressed. Energy of ions incident to the sample to be processed can be controlled to perform high-precision etching. The plasma potential can also be controlled so that the strength of the ion impact to the inner wall of the chamber can be reduced, thereby reducing particles detached from the inner wall of the processing apparatus to improve the throughput.Type: ApplicationFiled: September 6, 2001Publication date: March 14, 2002Inventors: Masahiro Sumiya, Naoki Yasui, Seiichi Watanabe
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Publication number: 20010028964Abstract: A master medium for use in magnetic transfer of information includes a metal disk which has a first relief or recess pattern representing the information. The metal disk is produced by exposing a photoresist film formed on a base disk with a laser or electron beam modulated with the information while rotating the base disk; developing the photoresist film so as to form an original disk having a second relief or recess pattern; depositing metal on the original disk so as to mold the metal disk on the original disk; and removing the metal disk from the original disk.Type: ApplicationFiled: March 12, 2001Publication date: October 11, 2001Inventors: Makoto Nagao, Seiichi Watanabe, Masakazu Nishikawa
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Publication number: 20010019784Abstract: A master medium for use in magnetic transfer of information to a magnetic recording medium. The master medium includes a resin substrate which is integrally molded with a microrelief or microrecess pattern being formed on a surface of the substrate and representing the information; and a magnetic layer formed on the microrelief or microrecess pattern. Preferably, the substrate and the microrelief or microrecess pattern are formed by injection molding using an original plate having a microrecess or microrelief pattern, or the 2P method using the original plate and an ultraviolet-curing resin.Type: ApplicationFiled: February 15, 2001Publication date: September 6, 2001Inventors: Masakazu Nishikawa, Seiichi Watanabe
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Patent number: 6254023Abstract: A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15-0.8 mm in contacting the one of the lateral edges of the photo film.Type: GrantFiled: October 19, 1999Date of Patent: July 3, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Mochizuki, Seiichi Watanabe, Keiji Shigesada, Naoyoshi Chino, Masahiro Enomoto, Mototada Yasui, Akira Tomita
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Patent number: 6216971Abstract: A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15-0.8 mm in contacting the one of the lateral edges of the photo film.Type: GrantFiled: October 19, 1999Date of Patent: April 17, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Mochizuki, Seiichi Watanabe, Keiji Shigesada, Naoyoshi Chino, Masahiro Enomoto, Mototada Yasui, Akira Tomita
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Patent number: 6190592Abstract: A photo film cassette includes a spool core, on which the photo film is wound in a form of roll. A cassette shell contains the spool core in rotatable fashion. First and second flanges are respectively secured to ends of the spool core, for regulating positions of sides of the photo film roll. A first ring-like lip is formed integrally with a periphery of the first flange, is projected toward the roll, is contacted on one edge of an outermost turn of the roll, and prevent the roll from being loosened. The first and second flanges are formed from resin in accordance with injection molding. The resin has temperature of thermal deformation being 80° C. or higher under 18.6 kg/cm2, modulus in elasticity in flexure being 13,000-30,000 kg/cm2, surface hardness being 80 or more in Rockwell R-scale, and high fluidity in molds for the injection molding. The first and second flanges have an outer diameter of 15 mm or more, thickness of 0.Type: GrantFiled: April 30, 1998Date of Patent: February 20, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Masahiro Enomoto, Mototada Yasui, Masuhiko Hirose, Seiichi Watanabe, Keiji Shigesada, Takashi Ohgiyama, Naoyoshi Chino
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Patent number: 6158383Abstract: In a plasma processing method and apparatus, microwaves are radiated from a slot antenna set at the bottom of a resonator, a plasma is generated using the microwave and a sample is processed by the plasma. A plasma having a ring-form is generated by the microwaves radiated from the slot antennas, which are disposed at an angle which is neither in parallel to nor perpendicular to a surface current flowing on a slot antenna plate. Thereby, the sample is uniformly processed.Type: GrantFiled: April 2, 1999Date of Patent: December 12, 2000Assignee: Hitachi, Ltd.Inventors: Seiichi Watanabe, Muneo Furuse, Hitoshi Tamura, Toru Otsubo
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Patent number: 6088909Abstract: A method for manufacturing a magnetic head core of a complex magnetic head includes binding a first core material of a U-shaped cross section and a second core material of a flat plate shape to form a tubular core material having two bonded portions between the first and second core materials. Then a plurality of grooves are formed in the tubular core material across one of the bonded portions to form a plurality of track surfaces. The grooves are then filled with a fused glass material, and the other of the bonded portions is removed to form a substantially U-shaped core block having a plurality of track surfaces separated by the glass-filled grooves. The U-shaped core block is then sliced along each of the grooves to obtain a plurality of magnetic head cores. A complex magnetic head manufactured by the method is also disclosed.Type: GrantFiled: January 8, 1998Date of Patent: July 18, 2000Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hirofumi Ouchi, Toshihisa Obuse, Yoshio Kasuga, Tatsunori Hibara, Masao Kouhashi, Kouichi Yamada, Seiichi Handa, Hiromasa Ishii, Seiichi Watanabe
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Patent number: 6065702Abstract: A photo film cassette has a spool core about which photo film is wound in a form of a roll. A cassette shell contains the spool core in a rotatable manner. Two flanges have a disk shape, and are secured to respective ends of the spool core, for regulating lateral edges of the roll of the photo film. A circumferential lip is disposed on each flange, is extended toward the opposite one of the flanges, wraps one of the lateral edges of an outermost turn of the photo film of the roll, and prevents the photo film from being loosened. A rim portion is disposed on an circular edge of the circumferential lip confronted with the opposite one of the flanges, to project with a bend away from the spool core. A contact face is disposed on the rim portion, and contacts the one of the lateral edges of the photo film when the photo film is unwound from the spool core or wound back about the spool core. The contact face has a contact range of 0.15.0.8 mm in contacting the one of the lateral edges of the photo film.Type: GrantFiled: August 13, 1998Date of Patent: May 23, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Mochizuki, Seiichi Watanabe, Keiji Shigesada, Naoyoshi Chino, Masahiro Enomoto, Mototada Yasui, Akira Tomita
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Patent number: 5999498Abstract: A magnetic head assembly comprises a magnetic head, a magnetic head support structure having a first mount, a second mount and a housing space, and an optical unit fixed to the second mount, capable of projecting a plurality of light beams through a light passage on a recording medium and of receiving a plurality of reflected light beam. The optical unit comprises a light emitting device which emits a light beam, a holographic unit capable of producing a plurality of light beams from the light beam and of focusing the plurality of light beams on a position sensing track formed on the recording medium, and a photodetection device for receiving the plurality of reflected light beams. The holographic unit is partly received in the housing space.Type: GrantFiled: April 29, 1998Date of Patent: December 7, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Seiichi Handa, Naoto Sugawara, Hitoshi Tamayama, Takeshi Oouchi, Seiichi Watanabe
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Patent number: 5914051Abstract: A microwave plasma processing method and apparatus of the type wherein a waveguide section includes electric discharge means isolated from a waveguide for the propagation of microwaves and having a plasma generation region therein, which method and apparatus are well suited for subjecting samples, such as semiconductor device substrates, to an etching process, a film forming process, etc. The microwaves are introduced into the electric discharge means in correspondence with only the traveling direction thereof, whereby uniformity in a plasma density distribution corresponding to the surface to-be-processed of the sample can be sharply enhanced, so that the sample processed by utilizing such plasma can attain an enhanced processing homogeneity within the surface to-be-processed.Type: GrantFiled: May 18, 1995Date of Patent: June 22, 1999Assignee: Hitachi, Ltd.Inventors: Saburo Kanai, Yoshinao Kawasaki, Kazuaki Ichihashi, Seiichi Watanabe, Makoto Nawata
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Patent number: 5898551Abstract: A magnetic disk cartridge has a magnetic head access opening formed radially from a portion of one side surface of a cassette shell to extend from the top surface through the side surface to the bottom surface thereof. A slidable shutter member for opening and closing the magnetic head access opening is provided to be slidable on the cassette shell. The shutter member is constituted as a sectionally .hoarfrost.-shaped sheet member comprising, as interconnected, an upper wing for covering the portion of the magnetic head access opening at the top surface, a shutter section for covering the portion of the magnetic head access opening at the side surface and a lower wing for covering the portion of the magnetic head access opening at the bottom surface. The magnetic head access opening is opened and closed by sliding the shutter member back and forth along these surfaces.Type: GrantFiled: August 1, 1996Date of Patent: April 27, 1999Assignees: Fuji Photo Film Co., Ltd., Iomega CorporationInventor: Seiichi Watanabe
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Patent number: 5894387Abstract: A magnetic head device is disclosed, including a magnetic circuit having a head core unit, a back core and a coil. The head core unit includes a first core made from a magnetic material and a second core made from a magnetic material. A magnetic gap is formed between the first core and the second core. The back core is made from a magnetic material and is joined to the first core and the second core to form back gaps between the back core and vertical portions of the first and second cores, and the coil is mounted on the first core. The device includes a first holder which is bonded to the first and second cores at two locations, one on the side of the magnetic gap and one on the side of the back gaps, to hold the magnetic circuit. The device further includes a second holder which is bonded to the first and second cores at the magnetic gap side to hold the magnetic circuit, the second holder being substantially in the shape of a rectangular beam.Type: GrantFiled: March 23, 1998Date of Patent: April 13, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Naoto Sugawara, Seiichi Watanabe, Seiichi Handa
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Patent number: 5892642Abstract: A magnetic disk cartridge has a magnetic head access opening formed in one side surface of a flat cassette shell having a top surface, a bottom surface and side surfaces. A shutter member provided to be slidable on the cassette shell for opening and closing the magnetic head access opening is constituted as a sectionally .hoarfrost.-shaped member formed by interconnecting a pair of upper wings, a shutter section and a pair of lower wings that extend respectively along the top surface, one side surface and the bottom surface. Portions of the top surface and the bottom surface of the cassette shell other than those adjacent to the one side surface portion formed with the magnetic head access opening are formed with recesses for receiving and guiding the upper wings and the lower wings of the shutter member.Type: GrantFiled: August 1, 1996Date of Patent: April 6, 1999Assignees: Iomega Corporation, Fuji Photo Film Co., Ltd.Inventor: Seiichi Watanabe
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Patent number: 5886473Abstract: A coaxial passage for supplying microwaves is vertically provided over a dielectric window forming part of a processing chamber, and a conductor plate for transmitting the microwaves is arranged over the dielectric window which is positioned on the outer circumference of the coaxial passage. A microwave transmission passage can be formed between the surface of a plasma so produced as to have a critical electron density n.sub.c, and the conductor plate thereby to transmit microwaves without any reflection along the dielectric window uniformly from the center to the outer circumference.Type: GrantFiled: August 29, 1997Date of Patent: March 23, 1999Assignee: Hitachi, Ltd.Inventors: Seiichi Watanabe, Masahiro Sumiya, Muneo Furuse, Hitoshi Tamura
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Patent number: 5862024Abstract: A magnetic disk cartridge has a first cassette shell half provided with engagement holes and a second cassette shell half provided with engagement pins. Each engagement hole has an entrance portion enabling insertion of an engagement pin and a shoulder-like engagement portion following the entrance portion. Each engagement pin has an elastic structure enabling it to be compressed and is formed at its tip portion with a bulged portion. The bulged portion is formed at its distal end with a tapered portion and at its proximal end with a sloped provisional retaining surface. The first and second cassette shell halves are formed on inner surfaces thereof with abutting surfaces. The cassette shell halves are provisionally assembled in the final assembly step by bringing the sloped provisional retaining surface of the bulged portion of the engagement pin engaged with the engagement hole into engagement with the shoulder-like engagement portion and bringing the abutting surfaces into abutment with each other.Type: GrantFiled: August 19, 1996Date of Patent: January 19, 1999Assignees: Fuji Photo Film Co., Ltd., Iomega Corp.Inventor: Seiichi Watanabe
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Patent number: 5833160Abstract: A photo film cassette includes a spool core, on which the photo film is wound in a form of roll. A cassette shell contains the spool core in rotatable fashion. First and second flanges are respectively secured to ends of the spool core, for regulating positions of sides of the photo film roll. A first ring-like lip is formed integrally with a periphery of the first flange, is projected toward the roll, is contacted on one edge of an outermost turn of the roll, and prevent the roll from being loosened. The first and second flanges are formed from resin in accordance with injection molding. The resin has temperature of thermal deformation being 80.degree. C. or higher under 18.6 kg/cm.sup.2, modulus in elasticity in flexure being 13,000-30,000 kg/cm.sup.2, surface hardness being 80 or more in Rockwell R-scale, and high fluidity in molds for the injection molding. The first and second flanges have an outer diameter of 15 mm or more, thickness of 0.3 mm or less, and a maximum projected area of 100 mm.sup.Type: GrantFiled: September 21, 1995Date of Patent: November 10, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Masahiro Enomoto, Mototada Yasui, Masuhiko Hirose, Seiichi Watanabe, Keiji Shigesada, Takashi Ohgiyama, Naoyoshi Chino