Patents by Inventor Takashi Takenaga
Takashi Takenaga 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).
-
Publication number: 20240116302Abstract: An apparatus includes a support member configured to support a printhead, a rotating member configured to be supported by the support member so as to be rotatable to an open position at which the printhead is capable of being attached to or detached from the support member and a closed position, a shaft portion arranged on one of the rotating member and the support member, a shaft supporting portion arranged on the other of the rotating member and the support member, the shaft portion being inserted to the shaft supporting portion in an axial direction, and a structure configured to regulate displacement of the rotating member in the axial direction in a predetermined rotation range of the rotating member, and permit displacement of the rotating member in the axial direction in a rotation position outside the predetermined rotation range.Type: ApplicationFiled: October 6, 2023Publication date: April 11, 2024Inventors: ATSUSHI KOHNOTOH, TAKASHI ABE, KEN TAKENAGA, YUSUKE NARATANI, KOUSUKE TANAKA
-
Publication number: 20240083183Abstract: A recording apparatus includes: a carriage on which a liquid ejection head that ejects a liquid is mounted, the carriage being reciprocally movable in a scanning direction; a guide member that extends in the scanning direction and that guides movement of the carriage in the scanning direction; and a sliding member that is provided on the carriage and has a sliding surface that slides with a guide surface of the guide member via a lubricant, in a case where the carriage moves in the scanning direction. The carriage has a projecting portion that projects farther toward one side in the scanning direction than the sliding member. A gap formed between the projecting portion and the guide surface becomes smaller toward the sliding member in the scanning direction.Type: ApplicationFiled: September 1, 2023Publication date: March 14, 2024Inventors: YUSUKE NARATANI, ATSUSHI KOHNOTOH, KEN TAKENAGA, TAKASHI ABE, KOUSUKE TANAKA
-
Publication number: 20230187459Abstract: An infrared sensor includes a first semiconductor substrate, a second semiconductor substrate, a sealing frame, and a first connection. The first semiconductor substrate includes a first main surface and an infrared detection element. The second semiconductor substrate includes a second main surface and a signal processing circuit. The sealing frame surrounds an internal space with the first main surface, the infrared detection element, and the second main surface. The first connection electrically connects the infrared detection element and the signal processing circuit. The internal space is hermetically sealed by the first main surface, the infrared detection element, the second main surface, and the sealing frame. Each of the sealing frame and the first connection is sandwiched between the first main surface and the second main surface.Type: ApplicationFiled: July 3, 2020Publication date: June 15, 2023Applicant: Mitsubishi Electric CorporationInventors: Daisuke FUJISAWA, Takashi TAKENAGA
-
Patent number: 8518562Abstract: A magnetic storage device stable in write characteristic is provided. A first nonmagnetic film is provided over a recording layer. A first ferromagnetic film is provided over the first nonmagnetic film and has a first magnetization and a first film thickness. A second nonmagnetic film is provided over the first ferromagnetic film. A second ferromagnetic film is provided over the second nonmagnetic film, is coupled in antiparallel with the first ferromagnetic film, and has a second magnetization and a second film thickness. An antiferromagnetic film is provided over the second ferromagnetic film. The sum of the product of the first magnetization and the first film thickness and the product of the second magnetization and the second film thickness is smaller than the product of the magnetization of the recording layer and the film thickness of the recording layer.Type: GrantFiled: November 12, 2009Date of Patent: August 27, 2013Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Takeharu Kuroiwa, Hiroshi Takada, Ryoji Matsuda, Yosuke Takeuchi
-
Patent number: 8492881Abstract: A magnetic storage device which enables stable operation at the time of recording information into MRAM and the stable retention of recorded information. The die of the magnetic storage device has a substrate, first and second wirings, a magnetic storage element and a first magnetic shielding structure. The first magnetic shielding structure is formed to cover the magnetic storage element in a plan view. Second and third magnetic shielding structures sandwich the die in a thickness direction. A lead frame member has the die mounted thereon and contains a ferromagnetic material. The lead frame member overlaps with only part of the die in a plan view.Type: GrantFiled: March 22, 2010Date of Patent: July 23, 2013Assignee: Renesas Electronics CorporationInventors: Takeharu Kuroiwa, Masayoshi Tarutani, Takashi Takenaga, Hiroshi Takada
-
Patent number: 8427866Abstract: There are provided magnetic storage elements capable of performing a high-reliability write operation by inhibiting erroneous reversal of data of the magnetic storage element put in a semi-selected state, and a magnetic storage device using this. A recording layer having an easy axis and a hard axis overlaps at least one of a first or second conductive layer at the entire region thereof in plan view. First endpoints of a first line segment along the easy axis and maximum in dimension overlapping the recording layer in plan view don't overlap the second conductive layer in plan view. At least one of second endpoints of a pair of endpoints of a second line segment passing through the middle point of the first line segment, orthogonal to the first line segment in plan view, and overlapping the recording layer in plan view doesn't overlap the first conductive layer in plan view.Type: GrantFiled: February 15, 2012Date of Patent: April 23, 2013Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Takeharu Kuroiwa, Taisuke Furukawa
-
Patent number: 8383427Abstract: A semiconductor device having a MTJ device excellent in operating characteristics and a manufacturing method therefor are provided. The MTJ device is formed of a laminated structure which is obtained by laminating a lower magnetic film, a tunnel insulating film, and an upper magnetic film in this order. The lower and upper magnetic films contain noncrystalline or microcrystalline ferrocobalt boron (CoFeB) as a constituent material. The tunnel insulating film contains aluminum oxide (AlOx) as a constituent material. A CAP layer is formed over the upper magnetic film and a hard mask is formed over the CAP layer. The CAP layer contains a substance of crystalline ruthenium (Ru) as a constituent material and the hard mask contains a substance of crystalline tantalum (Ta) as a constituent material. The film thickness of the hard mask is larger than that of the CAP layer.Type: GrantFiled: August 3, 2012Date of Patent: February 26, 2013Assignee: Renesas Electronics CorporationInventors: Ryoji Matsuda, Shuichi Ueno, Haruo Furuta, Takashi Takenaga, Takeharu Kuroiwa
-
Patent number: 8378674Abstract: A magnetic field detection device including a magnetic body (magnetic flux guide) provided for adjusting a magnetic field to be applied to a magneto-resistance element. A shape of an on-substrate magnetic body in plan view is a tapered shape on one end portion side and a substantially funnel shape on another end portion side opposite the one end portion, the another end portion being larger in width than the one end portion, and a magneto-resistance element is disposed in front of an output-side end portion. In the on-substrate magnetic body, a contour of a tapered portion is not linear like a funnel, but has a curved shape in which a first curved portion protruding outward with a gentle curvature and a second curved portion protruding inward with a curvature similar to that of the first curved portion are continuously formed.Type: GrantFiled: May 27, 2008Date of Patent: February 19, 2013Assignee: Mitsubishi Electric CorporationInventors: Taisuke Furukawa, Takeharu Kuroiwa, Shingo Tomohisa, Takashi Takenaga, Masakazu Taki, Hiroshi Takada, Yuji Abe
-
Patent number: 8362581Abstract: Magnetic memory element includes recording layer changing magnetization direction by external magnetic field, having easy-axis and hard-axis crossing easy-axis, first conductive layer forming magnetic field in direction crossing direction of easy-axis at layout position of recording layer, second conductive layer extending in direction crossing first conductive layer and forming magnetic field in direction crossing direction of hard-axis at layout position of recording layer. Recording layer has at least part between first conductive layer and second conductive layer. Planar-shaped recording layer viewed from direction where first and second conductive layers and recording layer are laminated, has portion located on side and other portion located on other side, with respect to virtual first center line of first conductive layer along direction where first conductive layer extends viewed from lamination direction.Type: GrantFiled: March 28, 2011Date of Patent: January 29, 2013Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Taisuke Furukawa, Takeharu Kuroiwa
-
Publication number: 20120301975Abstract: A semiconductor device having a MTJ device excellent in operating characteristics and a manufacturing method therefor are provided. The MTJ device is formed of a laminated structure which is obtained by laminating a lower magnetic film, a tunnel insulating film, and an upper magnetic film in this order. The lower and upper magnetic films contain noncrystalline or microcrystalline ferrocobalt boron (CoFeB) as a constituent material. The tunnel insulating film contains aluminum oxide (AlOx) as a constituent material. A CAP layer is formed over the upper magnetic film and a hard mask is formed over the CAP layer. The CAP layer contains a substance of crystalline ruthenium (Ru) as a constituent material and the hard mask contains a substance of crystalline tantalum (Ta) as a constituent material. The film thickness of the hard mask is larger than that of the CAP layer.Type: ApplicationFiled: August 3, 2012Publication date: November 29, 2012Inventors: Ryoji Matsuda, Shuichi Ueno, Haruo Furuta, Takashi Takenaga, Takeharu Kuroiwa
-
Publication number: 20120251847Abstract: There are provided magnetic storage elements capable of performing a high-reliability write operation by inhibiting erroneous reversal of data of the magnetic storage element put in a semi-selected state, and a magnetic storage device using this. A recording layer having an easy axis and a hard axis overlaps at least one of a first or second conductive layer at the entire region thereof in plan view. First endpoints of a first line segment along the easy axis and maximum in dimension overlapping the recording layer in plan view don't overlap the second conductive layer in plan view. At least one of second endpoints of a pair of endpoints of a second line segment passing through the middle point of the first line segment, orthogonal to the first line segment in plan view, and overlapping the recording layer in plan view doesn't overlap the first conductive layer in plan view.Type: ApplicationFiled: February 15, 2012Publication date: October 4, 2012Inventors: Takashi TAKENAGA, Takeharu KUROIWA, Taisuke FURUKAWA
-
Patent number: 8269295Abstract: There is provided a magnetic memory device stable in write characteristics. The magnetic memory device has a recording layer. The planar shape of the recording layer has the maximum length in the direction of the easy-axis over a primary straight line along the easy-axis, and is situated over a length smaller than the half of the maximum length in the direction perpendicular to the easy-axis, and on the one side and on the other side of the primary straight line respectively, the planar shape has a first part situated over a length in the direction perpendicular to the easy-axis, and a second part situated over a length smaller than the length in the direction perpendicular to the easy-axis. The outer edge of the first part includes only a smooth curve convex outwardly of the outer edge.Type: GrantFiled: April 18, 2011Date of Patent: September 18, 2012Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Takeharu Kuroiwa, Hiroshi Takada, Shuichi Ueno, Kiyoshi Kawabata
-
Patent number: 8258592Abstract: A semiconductor device having a MTJ device excellent in operating characteristics and a manufacturing method therefor are provided. The MTJ device is formed of a laminated structure which is obtained by laminating a lower magnetic film, a tunnel insulating film, and an upper magnetic film in this order. The lower and upper magnetic films contain noncrystalline or microcrystalline ferrocobalt boron (CoFeB) as a constituent material. The tunnel insulating film contains aluminum oxide (AlOx) as a constituent material. A CAP layer is formed over the upper magnetic film and a hard mask is formed over the CAP layer. The CAP layer contains a substance of crystalline ruthenium (Ru) as a constituent material and the hard mask contains a substance of crystalline tantalum (Ta) as a constituent material. The film thickness of the hard mask is larger than that of the CAP layer.Type: GrantFiled: May 11, 2009Date of Patent: September 4, 2012Assignee: Renesas Electronics CorporationInventors: Ryoji Matsuda, Shuichi Ueno, Haruo Furuta, Takashi Takenaga, Takeharu Kuroiwa
-
Publication number: 20110291209Abstract: To provide a magnetic memory device having an increased write current and improved reliability in writing. The magnetic memory device of the invention has a substrate, a write line provided over the substrate, a bit line placed with a space from the write line in a thickness direction of the substrate and extending in a direction crossing with an extending direction of the write line, and a magnetic memory element positioned between the write line and the bit line. The magnetic memory element has a pinned layer whose magnetization direction has been fixed and a recording layer whose magnetization direction changes, depending on an external magnetic field. The recording layer contains an alloy film. The alloy film contains cobalt, iron, and boron and its boron content exceeds 21 at %.Type: ApplicationFiled: June 1, 2011Publication date: December 1, 2011Inventors: Takashi TAKENAGA, Ryoji MATSUDA, Junichi TSUCHIMOTO
-
Patent number: 8036024Abstract: In a ferromagnetic tunnel junction element, a recording layer is in a circular shape, which can suppress an increase in magnetization switching field due to miniaturization of the element. Further, the recording layer includes a first ferromagnetic layer, a first non-magnetic layer, a second ferromagnetic layer, a second non-magnetic layer, and a third ferromagnetic layer successively stacked. The first and second ferromagnetic layers, and the second and third ferromagnetic layers are coupled antiparallel to each other, so that it is possible to control the magnetization distribution of the recording layer in an approximately single direction.Type: GrantFiled: May 30, 2006Date of Patent: October 11, 2011Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Takeharu Kuroiwa, Hiroshi Kobayashi, Sadeh Beysen
-
Publication number: 20110233699Abstract: Magnetic memory element includes recording layer changing magnetization direction by external magnetic field, having easy-axis and hard-axis crossing easy-axis, first conductive layer forming magnetic field in direction crossing direction of easy-axis at layout position of recording layer, second conductive layer extending in direction crossing first conductive layer and forming magnetic field in direction crossing direction of hard-axis at layout position of recording layer. Recording layer has at least part between first conductive layer and second conductive layer. Planar-shaped recording layer viewed from direction where first and second conductive layers and recording layer are laminated, has portion located on side and other portion located on other side, with respect to virtual first center line of first conductive layer along direction where first conductive layer extends viewed from lamination direction.Type: ApplicationFiled: March 28, 2011Publication date: September 29, 2011Inventors: Takashi Takenaga, Taisuke Furukawa, Takeharu Kuroiwa
-
Patent number: 8013407Abstract: There is provided a magnetic memory device stable in write characteristics. The magnetic memory device has a recording layer. The planar shape of the recording layer has the maximum length in the direction of the easy-axis over a primary straight line along the easy-axis, and is situated over a length smaller than the half of the maximum length in the direction perpendicular to the easy-axis, and on the one side and on the other side of the primary straight line respectively, the planar shape has a first part situated over a length in the direction perpendicular to the easy-axis, and a second part situated over a length smaller than the length in the direction perpendicular to the easy-axis. The outer edge of the first part includes only a smooth curve convex outwardly of the outer edge.Type: GrantFiled: March 6, 2009Date of Patent: September 6, 2011Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Takeharu Kuroiwa, Hiroshi Takada, Shuichi Ueno, Kiyoshi Kawabata
-
Publication number: 20110193185Abstract: There is provided a magnetic memory device stable in write characteristics. The magnetic memory device has a recording layer. The planar shape of the recording layer has the maximum length in the direction of the easy-axis over a primary straight line along the easy-axis, and is situated over a length smaller than the half of the maximum length in the direction perpendicular to the easy-axis, and on the one side and on the other side of the primary straight line respectively, the planar shape has a first part situated over a length in the direction perpendicular to the easy-axis, and a second part situated over a length smaller than the length in the direction perpendicular to the easy-axis. The outer edge of the first part includes only a smooth curve convex outwardly of the outer edge.Type: ApplicationFiled: April 18, 2011Publication date: August 11, 2011Applicant: RENESAS ELECTRONICS CORPORTIONInventors: Takashi Takenaga, Takeharu Kuroiwa, Hiroshi Takada, Shuichi Ueno, Kiyoshi Kawabata
-
Patent number: 7983075Abstract: Ferromagnetic layers have magnetizations oriented to such directions as to cancel each other, so that the net magnetization of the ferromagnetic layers is substantially zero. That is, the ferromagnetic layers are exchange-coupled with a nonmagnetic layer interposed therebetween, thereby forming an SAF structure. Since the net magnetization of the ferromagnetic layers forming the SAF structure is substantially zero, the magnetization of a recording layer is determined by the magnetization of a ferromagnetic layer. Therefore, the ferromagnetic layer is made of a CoFeB alloy having high uniaxial magnetic anisotropy, and the ferromagnetic layers are made of a CoFe alloy having a high exchange-coupling force.Type: GrantFiled: July 6, 2010Date of Patent: July 19, 2011Assignee: Renesas Electronics CorporationInventors: Takashi Takenaga, Takeharu Kuroiwa, Taisuke Furukawa, Masakazu Taki
-
Patent number: 7932573Abstract: A magnetic memory element having a layer structure containing a fixing layer (pinned layer: PL) having a magnetization direction fixed unidirectionally, a nonmagnetic dielectric layer (TN1) in contact with the fixing layer (PL), and a memory layer (free layer: FL) having a first surface in contact with the nonmagnetic dielectric layer (TN1) and a second surface on the opposite to the first surface, the magnetization direction of the memory layer (FL) having a reversible magnetization direction in response to the current through the layer structure. The entire surface of the first surface of the memory layer (FL) is covered with the nonmagnetic dielectric layer (TN1) and in the joint surface of the nonmagnetic dielectric layer (TN1) and the fixing layer (PL), the first surface of the nonmagnetic dielectric layer (TN1) is exposed in a manner of surrounding the joint surface.Type: GrantFiled: April 21, 2009Date of Patent: April 26, 2011Assignee: Renesas Electronics CorporationInventors: Hiroshi Takada, Takashi Takenaga, Takeharu Kuroiwa, Taisuke Furukawa