Patents by Inventor Chiaki Okuyama
Chiaki Okuyama 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: 20240145356Abstract: A lead frame includes a plurality of lead portions. At least a part of an upper surface of the lead portion and a sidewall surface of the lead portion is a rough surface having been subjected to roughening treatment. A value of a* in a CIELab color space of the rough surface is within a range from 12 to 19, and a value of b* is within a range from 12 to 17.Type: ApplicationFiled: September 1, 2022Publication date: May 2, 2024Applicant: DAI NIPPON PRINTING CO., LTD.Inventors: Masahiro NAGATA, Kazuhiro SHINOZAKI, Masahiro YAMADA, Daisuke OKUYAMA, Chiaki HATSUTA, Kentarou SEKI, Hideto MATSUI, Kazunori OOUCHI
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Publication number: 20160292235Abstract: A non-transitory computer-readable recording medium stores therein a data format for clinical test creation supporting program that causes a computer to execute a process including, accepting registration of a name of a data item used in a clinical test; searching a first name associated with a second name corresponding to the accepted name of the data item with reference to a storage unit that stores the second name in association with the first name related to the data item used in the clinical test; and outputting a search result screen on which the first name searched from the storage unit is displayed.Type: ApplicationFiled: January 28, 2016Publication date: October 6, 2016Applicant: FUJITSU LIMITEDInventors: Kunihito EBI, Kazuo YAMAKAWA, Chiaki OKUYAMA
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Patent number: 7368187Abstract: A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.Type: GrantFiled: October 28, 2004Date of Patent: May 6, 2008Assignee: Fujitsu LimitedInventors: Chiaki Okuyama, Akira Kikuchi, Takashi Gouke
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Patent number: 7049013Abstract: A magnetic recording medium is provided with a substrate, and a magnetic layer made of a CoCr-based alloy and having a multi-layer structure and disposed above the substrate. The multi-layer structure has a first magnetic layer disposed above the substrate and at least one second magnetic layer disposed on the first magnetic layer on an opposite side from the substrate. The first magnetic layer has a Cr-content larger than that of the second magnetic layer, and has a larger sum total content of nonmagnetic elements which are other than Cr and have a larger atomic radius than Co than the second magnetic layer.Type: GrantFiled: January 29, 2001Date of Patent: May 23, 2006Assignee: Fujitsu LimitedInventors: Kazuhisa Shida, Atsushi Endo, Chiaki Okuyama, Akira Kikuchi
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Publication number: 20050069734Abstract: A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.Type: ApplicationFiled: October 28, 2004Publication date: March 31, 2005Applicant: FUJITSU LIMITEDInventors: Chiaki Okuyama, Akira Kikuchi, Takashi Gouke
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Patent number: 6830807Abstract: A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.Type: GrantFiled: June 27, 2002Date of Patent: December 14, 2004Assignee: Fujitsu LimitedInventors: Chiaki Okuyama, Atsushi Endo, Akira Kikuchi, Takashi Gouke, Reiko Murao
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Patent number: 6753102Abstract: An object of this invention is to provide a magnetic recording medium in which its S/Nm (output/medium noise ratio) is improved. This magnetic recording medium is comprised of a first foundation layer made of alloy material composed of mainly Cr with added B, a second foundation layer made of alloy material in which Mo is mixed in Cr, an intermediate layer made of alloy material composed of mainly Co with added Cr and Ta, a lower magnetic layer and an upper magnetic layer made of alloy material composed of mainly Co with added Cr, Pt, B and a protective film composed of mainly C, these layers being formed in this order from the bottom.Type: GrantFiled: March 27, 2002Date of Patent: June 22, 2004Assignee: Fujitsu LimitedInventors: Reiko Murao, Chiaki Okuyama, Akira Kikuchi
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Patent number: 6686069Abstract: A magnetic recording medium includes a non-magnetic substrate, a first non-magnetic control layer disposed above the substrate, a soft magnetic layer disposed above the first control layer, and a second non-magnetic control layer disposed above the soft magnetic layer. A primary magnetic layer is disposed above the second control layer.Type: GrantFiled: September 27, 2000Date of Patent: February 3, 2004Assignee: Fujitsu LimitedInventors: Chiaki Okuyama, Naoya Saitoh, Akira Kikuchi
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Patent number: 6682834Abstract: A magnetic storage medium includes a magnetic layer of a Co alloy of a system Co—Cr—Pt—B—Cu, wherein the magnetic layer has a thickness t and a remnant magnetic flux density Br satisfying a relationship (t×Br) 2.0 nT·m≦(t×Br)≦7.0 nT·m, wherein the Co alloy contains, in addition to Co, Cr with a concentration &bgr; of 20-26 at % (20 at %≦&bgr;≦26 at %), Pt with a concentration &ggr; of 6-20 at % (6 at %≦&ggr;≦20 at %), B with a concentration &dgr; of 1-7 at % (1 at %≦&dgr;≦7 at %), and Cu with a concentration &egr; of 2-7 at % (2 at %≦&egr;≦7 at %).Type: GrantFiled: March 13, 2001Date of Patent: January 27, 2004Assignee: Fujitsu LimitedInventors: Chiaki Okuyama, Reiko Murao, Atsushi Endo, Akira Kikuchi
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Publication number: 20030138666Abstract: A magnetic recording medium includes a substrate; and a recording layer and a protection layer which are provided upward of the substrate, wherein the recording layer includes a magnetic layer; and the magnetic layer includes an additive chemical element selected from a CoCrPt group alloy and a group comprising and chemical elements in which a standard electrode electric potential is negative and platinum group chemical elements other than Pt.Type: ApplicationFiled: July 16, 2002Publication date: July 24, 2003Applicant: FUJITSU LIMITEDInventors: Takashi Gouke, Chiaki Okuyama, Akira Kikuchi
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Publication number: 20030124388Abstract: An object of this invention is to provide a magnetic recording medium in which its S/Nm (output/medium noise ratio) is improved. This magnetic recording medium is comprised of a first foundation layer made of alloy material composed of mainly Cr with added B, a second foundation layer made of alloy material in which Mo is mixed in Cr, an intermediate layer made of alloy material composed of mainly Co with added Cr and Ta, a lower magnetic layer and an upper magnetic layer made of alloy material composed of mainly Co with added Cr, Pt, B and a protective film composed of mainly C, these layers being formed in this order from the bottom.Type: ApplicationFiled: March 27, 2002Publication date: July 3, 2003Applicant: FUJITSU LIMITEDInventors: Reiko Murao, Chiaki Okuyama, Akira Kikuchi
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Patent number: 6541104Abstract: A magnetic recording medium has a construction in which on a non-magnetic support member are successively stacked a seed layer made of a non-magnetic material that is mainly composed of Cr, a keeper layer made of an NiFe-type soft magnetic material, an intermediate layer made of a non-magnetic material that is mainly composed of Cr and a recording layer made of a magnetic material that is mainly composed of Co.Type: GrantFiled: March 8, 2001Date of Patent: April 1, 2003Assignee: Fujitsu LimitedInventors: Hideyuki Akimoto, Chiaki Okuyama, Iwao Okamoto
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Publication number: 20030039071Abstract: A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.Type: ApplicationFiled: June 27, 2002Publication date: February 27, 2003Applicant: Fujitsu LimitedInventors: Chiaki Okuyama, Atsushi Endo, Akira Kikuchi, Takashi Gouke, Reiko Murao
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Patent number: 6509108Abstract: A magnetic recording medium has a nonmagnetic substrate having applied thereon through a nonmagnetic underlayer a magnetic recording layer composed of a magnetic metal material. The nonmagnetic substrate has a smooth surface with an average surface roughness Ra of not more than 20 Å, a recesses-and protrusions-forming layer having stripe-like protrusions and recesses in the circumferential direction, formed on the substrate. A CrP or CrMoP reinforcing coat layer having a hardness higher than that of the recesses-and protrusions-forming layer is sandwiched between the substrate and the recesses-and-protrusions-forming layer.Type: GrantFiled: March 19, 2001Date of Patent: January 21, 2003Assignee: Fujitsu LimitedInventors: Chiaki Okuyama, Yuki Yoshida, Kenji Sato, Kiyoshi Yamaguchi, Yoshita Kitamoto
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Publication number: 20020102440Abstract: A magnetic recording medium is provided with a substrate, and a magnetic layer made of a CoCr-based alloy and having a multi-layer structure and disposed above the substrate. The multi-layer structure has a first magnetic layer disposed above the substrate and at least one second magnetic layer disposed on the first magnetic layer on an opposite side from the substrate. The first magnetic layer has a Cr-content larger than that of the second magnetic layer, and has a larger sum total content of nonmagnetic elements which are other than Cr and have a larger atomic radius than Co than the second magnetic layer.Type: ApplicationFiled: January 29, 2001Publication date: August 1, 2002Applicant: FUJITSU LIMITEDInventors: Kazuhisa Shida, Atsushi Endo, Chiaki Okuyama, Akira Kikuchi
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Publication number: 20020037441Abstract: A magnetic storage medium includes a magnetic layer of a Co alloy of a system Co—Cr—Pt—B—Cu, wherein the magnetic layer has a thickness t and a remnant magnetic flux density Br satisfying a relationship (t×Br) 2.0 nT·m≦(t×Br)≦7.0 nT·m, wherein the Co alloy contains, in addition to Co, Cr with a concentration &bgr; of 20-26 at % (20 at %≦&bgr;≦26 at %), Pt with a concentration &ggr; of 6-20 at % (6 at %≦&ggr;≦20 at %), B with a concentration &dgr; of 1-7 at % (1 at %≦&dgr;≦7 at %), and Cu with a concentration &egr; of 2-7 at % (2 at %≦&egr;≦7 at %).Type: ApplicationFiled: March 13, 2001Publication date: March 28, 2002Applicant: FUJITSU LIMITEDInventors: Chiaki Okuyama, Reiko Murao, Atsushi Endo, Akira Kikuchi
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Publication number: 20010030829Abstract: A magnetic recording medium comprising a nonmagnetic substrate having applied thereon through a nonmagnetic underlayer a magnetic recording layer composed of a magnetic metal material, in which the nonmagnetic substrate comprises a substrate having a smooth surface with an average surface roughness Ra of not more than 20 Å, a recesses-and protrusions-forming layer having stripe-like protrusions and recesses in the circumferential direction, formed on the substrate, and a reinforcing coat layer having a hardness higher than that of the recesses-and protrusions-forming layer is sandwiched between the substrate and the recesses-and-protrusions-forming layer. The magnetic recording medium is excellent in a characteristic of friction sliding with a flying-type magnetic head, can improve the reproducing output and S/N ratio while the low noise of the magnetic recording medium is kept without change, and prevents easy production of bit errors.Type: ApplicationFiled: March 19, 2001Publication date: October 18, 2001Applicant: FUJITSU LIMITEDInventors: Chiaki Okuyama, Yuki Yoshida, Kenji Sato, Kiyoshi Yamaguchi, Yoshito Kitamoto
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Patent number: 6299946Abstract: A method of manufacturing a recording medium includes the steps of: a) providing an underlayer on a substrate; b) providing a magnetic layer on the under layer; c) providing a protection layer of amorphous carbon on the magnetic layer; and d) providing a lubrication layer of fluorine on the protection layer, the lubrication layer including a bonding layer part which is strongly bonded to the protection layer and a mobile layer part which is not strongly bonded to the protection layer. The method further includes the steps of: e) implementing a UV curing process on the surface of the protection layer between the step c) and d), so that a ratio of the bonding layer part in the lubrication layer is increased.Type: GrantFiled: March 6, 2000Date of Patent: October 9, 2001Assignee: Fujitsu LimitedInventors: Takashi Toyoguchi, Chiaki Okuyama
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Publication number: 20010009727Abstract: A magnetic recording medium has a construction in which on a non-magnetic support member are successively stacked a seed layer made of a non-magnetic material that is mainly composed of Cr, a keeper layer made of an NiFe-type soft magnetic material, an intermediate layer made of a non-magnetic material that is mainly composed of Cr and a recording layer made of a magnetic material that is mainly composed of Co.Type: ApplicationFiled: March 8, 2001Publication date: July 26, 2001Applicant: FUJITSU LIMITEDInventors: Hideyuki Akimoto, Chiaki Okuyama, Iwao Okamoto
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Patent number: 6129981Abstract: A magnetic recording medium and a magnetic disk device using the same. The magnetic recording medium comprising a nonmagnetic substrate having applied thereon, through a chromium-based underlayer, at least one magnetic recording layer consisting of cobalt as a principal component, 14 to 23 at % of chromium, 1 to 20 at % of platinum as well as tungsten and carbon. The magnetic recording medium exhibits reduced noise, an improved resolution of the reproducing waveforms and an increased S/N ratio.Type: GrantFiled: November 6, 1998Date of Patent: October 10, 2000Assignee: Fujitsu LimitedInventors: Chiaki Okuyama, Kenji Sato, Yuki Yoshida, Iwao Okamoto