Patents by Inventor Shuichi Sawada
Shuichi Sawada 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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Patent number: 6998858Abstract: A slide unit is slid on a flat slide plane of a table to adjust the relative positions of a plurality of slide units along a direction parallel to the flat slide plane. Even if the slide unit moves together with a movable unit along the direction parallel to the flat slide plane, the relative positions of a plurality of movable units will not change along a direction vertical to the flat slide plane. By sliding the slide unit on the flat slide plane of the table and moving the movable unit along the direction vertical to a slide surface, the relative positions of a plurality of probes mounted on the movable units can be adjusted independently and separately along the directions parallel to and vertical to the flat slide plane.Type: GrantFiled: February 18, 2004Date of Patent: February 14, 2006Assignee: Yamaha CorporationInventors: Shuichi Sawada, Masaya Tsuchie
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Publication number: 20040239351Abstract: A slide unit is slid on a flat slide plane of a table to adjust the relative positions of a plurality of slide units along a direction parallel to the flat slide plane. Even if the slide unit moves together with a movable unit along the direction parallel to the flat slide plane, the relative positions of a plurality of movable units will not change along a direction vertical to the flat slide plane. By sliding the slide unit on the flat slide plane of the table and moving the movable unit along the direction vertical to a slide surface, the relative positions of a plurality of probes mounted on the movable units can be adjusted independently and separately along the directions parallel to and vertical to the flat slide plane.Type: ApplicationFiled: February 18, 2004Publication date: December 2, 2004Inventors: Shuichi Sawada, Masaya Tsuchie
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Publication number: 20040217350Abstract: A probe unit comprises a flexible substrate made of an inorganic substance and having an almost straight edge, an electro conductive film formed on a surface of the substrate and having a plurality of contact parts aligned on a surface of the edge and can contact with electrodes of a sample and lead parts connected to the contact parts, wherein the substrate is elastically deformed together with the contact part while the plurality of the contacts parts are supported by the edge when a force is added to press a surface of the contact part.Type: ApplicationFiled: April 27, 2004Publication date: November 4, 2004Inventors: Masahiro Sugiura, Toshitaka Yoshino, Shuichi Sawada
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Patent number: 6680536Abstract: A probe unit has a plurality of metal leads regularly juxtaposed on the surface of a substrate. Each metal lead has a resilient contact piece in a front portion of the lead, the resilient contact piece being spaced apart from the substrate surface or extending over an edge of the substrate. The cross sectional shape of the resilient contact piece is an arc shape and/or has a projection near at the distal end of the resilient contact piece.Type: GrantFiled: March 27, 2002Date of Patent: January 20, 2004Assignee: Yamaha CorporationInventors: Atsuo Hattori, Shuichi Sawada, Masahiro Sugiura, Yoshiki Terada
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Patent number: 6665156Abstract: By constituting a MR head with a pair of magnet films defining a recess on a lower gap layer, the recess having generally an inverted trapezoid shape in cross section; a magnetoresistive film covering a bottom and side wall of the recess and partial upper surfaces of the pair of magnet films; and a pair of electrically conductive films formed on the magnet films and being in contact with said magnetoresistive film only at a position outside of the recess, it becomes possible to reduce a variation in reading track widths of MR heads even under mass production.Type: GrantFiled: March 27, 2001Date of Patent: December 16, 2003Assignee: Yamaha CorporationInventors: Kenichi Miyazawa, Shuichi Sawada, Yukio Wakui
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Publication number: 20030052703Abstract: A probe unit to be fixed to a probe device for testing functions of a test body. The probe unit includes: a substrate; probe pins formed on the substrate by lithography, the probe pins having distal ends protruded from the substrate and being made in contact with electrodes of the test body; and a positioning member formed on the substrate by lithography at a predetermined position relative to the probe pins, the positioning means abutting upon a member for positioning the substrate relative to the probe device.Type: ApplicationFiled: September 18, 2002Publication date: March 20, 2003Inventors: Yoshiki Terada, Shuichi Sawada, Atsuo Hattori
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Patent number: 6504681Abstract: Projected ABSs (air bearing surfaces) are formed on a disk facing plane of a slider. Three-dimensional corners constituting the corners of ABSs are chamfered. Two-dimensional corners constituting side edges of ABSs are not chamfered and has sharp edges. Damages of a disk surface and breakage of the slider are prevented when the slider collides with the disk surface by external shock.Type: GrantFiled: October 26, 1999Date of Patent: January 7, 2003Assignee: Yamaha CorporationInventor: Shuichi Sawada
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Publication number: 20020142509Abstract: A probe unit has a plurality of metal leads regularly juxtaposed on the surface of a substrate. Each metal lead has a resilient contact piece in a front portion of the lead, the resilient contact piece being spaced apart from the substrate surface or extending over an edge of the substrate. The cross sectional shape of the resilient contact piece is an arc shape and/or has a projection near at the distal end of the resilient contact piece.Type: ApplicationFiled: March 27, 2002Publication date: October 3, 2002Inventors: Atsuo Hattori, Shuichi Sawada, Masahiro Sugiura, Yoshiki Terada
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Publication number: 20010026425Abstract: By constituting a MR head with a pair of magnet films defining a recess on a lower gap layer, the recess having generally an inverted trapezoid shape in cross section; a magnetoresistive film covering a bottom and side wall of the recess and partial upper surfaces of the pair of magnet films; and a pair of electrically conductive films formed on the magnet films and being in contact with said magnetoresistive film only at a position outside of the recess, it becomes possible to reduce a variation in reading track widths of MR heads even under mass production.Type: ApplicationFiled: March 27, 2001Publication date: October 4, 2001Applicant: Yamaha CorporationInventors: Kenichi Miyazawa, Shuichi Sawada, Yukio Wakui
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Patent number: 6033580Abstract: On a substrate, a lower pole is formed being embedded in a protective film on which a gap layer is formed. On this gap layer, a first upper pole is formed facing the lower pole. A protective film is formed coplanar to the upper surface of the first upper pole. On this protective film, a coil made of a plurality of coil layers is formed being embedded in an insulating film. On the insulating film, an upper core layer is formed whose tip portion constitutes a second upper pole stacked upon the first upper pole and magnetically coupled thereto. The first upper pole formed before the coil is formed and the second upper pole formed after the coil is formed, constitute an upper pole.Type: GrantFiled: December 30, 1997Date of Patent: March 7, 2000Assignee: Yamaha CorporationInventors: Shigeru Shouji, Shuichi Sawada
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Patent number: 5997755Abstract: Projected ABSs (air bearing surfaces) are formed on a disk facing plane of a slider. Three-dimensional corners constituting the corners of ABSs are chamfered. Two-dimensional corners constituting side edges of ABSs are not chamfered and has sharp edges. Damages of a disk surface and breakage of the slider are prevented when the slider collides with the disk surface by external shock.Type: GrantFiled: September 30, 1997Date of Patent: December 7, 1999Assignee: Yamaha CorporationInventor: Shuichi Sawada
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Patent number: 5831801Abstract: On a substrate, a lower pole is formed being embedded in a protective film on which a gap layer is formed. On this gap layer, a first upper pole is formed facing the lower pole. A protective film is formed coplanar to the upper surface of the first upper pole. On this protective film, a coil made of a plurality of coil layers is formed being embedded in an insulating film. On the insulating film, an upper core layer is formed whose tip portion constitutes a second upper pole stacked upon the first upper pole and magnetically coupled thereto. The first upper pole formed before the coil is formed and the second upper pole formed after the coil is formed, constitute an upper pole.Type: GrantFiled: January 21, 1997Date of Patent: November 3, 1998Assignee: Yamaha CorporationInventors: Shigeru Shouji, Shuichi Sawada
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Patent number: 5469769Abstract: In a laminated construction of a soundboard for use in musical instruments such as the piano, the use of a core having larger shearing elastic modulus and/or smaller shearing loss tangent than that of the fore and rear plates assures small shearing loss in the treble range, and greatly improves the total tonal balance over the entire tonal range.Type: GrantFiled: June 26, 1989Date of Patent: November 28, 1995Assignee: Yamaha CorporationInventors: Shuichi Sawada, Katsuhiko Imagawa, Yoshihiko Murase
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Patent number: 5047886Abstract: A thin-film magnetic head is constructed by a lower core, a first insulating layer, a gap layer, a plurality of coil conductor layers, a plurality of insulating layers and an upper layer. The coil conductor layers are respectively embedded in the insulating layers. Each of the coil conductor layers is spirally formed on the gap layer, and the coil conductor layers are sequentially piled up on the gap layer. The gap layer is formed on the first insulating layer which coats and insulates the lower core. Then, an edge portion is formed by sandwiching the first insulating layer and the gap layer between the lower and upper cores. The first insulating layer whose shape affects the writing/reading efficiency of the thin-film magnetic head is protected by the gap layer. Preferably, the gap layer is formed by coating Al.sub.2 O.sub.3 film or SiO.sub.2 on the first insulating layer.Type: GrantFiled: March 19, 1990Date of Patent: September 10, 1991Assignee: Yamaha CorporationInventors: Atsushi Toyoda, Shuichi Sawada
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Patent number: 4947541Abstract: A lower core is formed on the surface of a wafer and then a protection film made of substance that has a lower ion milling rate than that of the lower core is formed so as to coat the lower core. Then, the protection film is ground to expose the lower core under the film, and the surface of the protection film and that of the lower core are finished smooth and level. Then, ion beams are radiated to simultaneously mill both the protection film and the lower core and thereby form a recess above the lower core. Next, a gap layer is formed on the surfaces of both the protection film and the lower core. Then, an upper core is formed in the recess above the lower core with a gap layer between them. Accordingly, only the part in which the pole of the upper core and the pole of the lower core face each other in parallel is magnetically effective. This ensures a constant track width even in mass production provided that only the lower core is formed strictly in accordance with the design.Type: GrantFiled: September 1, 1989Date of Patent: August 14, 1990Assignee: Yamaha CorporationInventors: Atsushi Toyoda, Shuichi Sawada
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Patent number: 4896417Abstract: When writing data on a recording medium, a thin film magnetic head must concentrate its magnetic fluxes to a tip end of a pole thereof. For this reason, ineffective leakage magnetic fluxes to be outputted in the writing must be reduced as much as possible by desirably varying construction or formation of the thin film magnetic head. These magnetic fluxes are passed and converged through a lower layer core which is formed within a recess formed within a substrate of the thin film magnetic head. Through several experiments and study, it is proved that an average inclination angle at a side wall slope of the recess must be ranged from 15 degrees to 75 degrees.Type: GrantFiled: February 17, 1989Date of Patent: January 30, 1990Assignee: Yamaha CorporationInventors: Shuichi Sawada, Atsushi Toyoda
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Patent number: 4873034Abstract: A process for producing a relatively thick microporous ultra-high-molecular-weight polyolefin membrane, including the steps of: (1) preparing a solution of an ultra-high-molecular-weight polyolefin having a weight-average molecular weight of 5.times.10.sup.5 or more; (b) extruding the solution from a die while rapidly cooling it in advance to its gelation temperature or below, thereby forming a gel-like sheet; (c) removing at least 10 wt % of the solvent from the gel-like sheet so that the gel-like sheet contains 10 to 90 wt % of the ultra-high-molecular-weight polyolefin; (d) stretching the gel-like sheet at a temperature equal to or lower than that which is 10.degree. C. above the melting point of the ultra-high-molecular-weight polyolefin; and (e) removing the residual solvent from the stretched product.Type: GrantFiled: July 22, 1988Date of Patent: October 10, 1989Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Koichi Kono, Kenkichi Okamoto, Rumi Iwasaki, Shuichi Sawada
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Patent number: 4718964Abstract: In construction of a FRP sound bar preferably by lamination for percussive musical instruments, 30 to 80% by volume of reinforcing fibers are oriented in a resin matrix at least in the longitudinal direction of the sound bar and a plurality of longitudinal pores are almost uniformly distributed over the entire cross section of the sound bar, for easy and low cost production with ideal sound extension.Type: GrantFiled: December 2, 1986Date of Patent: January 12, 1988Assignee: Nippon Gakki Seizo Kabushiki KaishaInventors: Shuichi Sawada, Yoshihiko Murase
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Patent number: 4649791Abstract: In construction of a FRP sound bar preferably by lamination for percussive musical instruments, 30 to 80% by volume of reinforcing fibers are oriented in a resin matrix at least in the longitudinal direction of the sound bar and a plurality of longitudinal pores are almost uniformly distributed over the entire cross section of the sound bar, for easy and low cost production with ideal sound extension.Type: GrantFiled: May 21, 1985Date of Patent: March 17, 1987Assignee: Nippon Gakki Seizo Kabushiki KaishaInventors: Shuichi Sawada, Yoshihiko Murase
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Patent number: 4188316Abstract: Process for producing a molding compound with a pattern which comprises the steps of:(a) preparing a plurality of unsaturated polyester resin compositions of different color tones;(b) uniting the plural resin compositions after at least either one in each pair of the adjacent compositions to be united has been thickened; and(c) thickening all of the united resin compositions to form a solid or semi-solid molding composition.Type: GrantFiled: May 27, 1977Date of Patent: February 12, 1980Assignee: Nippon Gakki Seizo Kabushiki KaishaInventor: Shuichi Sawada