Patents by Inventor Klaus Weller
Klaus Weller 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: 8383254Abstract: An apparatus includes a substrate, a magnetically soft underlayer on the substrate, and a plurality of generally cubic FePt nanoparticles on the magnetically soft underlayer, wherein the nanoparticles have a magnetization in a direction substantially normal to a surface of the magnetically soft underlayer. The FePt nanoparticles can have magnetically easy axes perpendicular to the surface of the soft underlayer.Type: GrantFiled: September 28, 2010Date of Patent: February 26, 2013Assignee: Seagate Technology LLCInventors: Nisha Shukla, Timothy John Klemmer, Dieter Klaus Weller, Chao Liu
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Patent number: 8312609Abstract: The invention relates to a method of manufacturing a patterned media Ni stamper comprising depositing a perfluorodecyltrichlorosilane release layer. The release layer eliminates bonding at the master-stamper interface. A permanent master for manufacturing a patterned media stamper is also provided.Type: GrantFiled: July 23, 2008Date of Patent: November 20, 2012Assignee: Seagate Technology, LLCInventors: Gennady Gauzner, Nobuo Kurataka, Dieter Klaus Weller, Christopher Joseph Formato
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Patent number: 8194508Abstract: The presently disclosed technology teaches a transducer head with a read sensor, a write pole, and one or more waveform sensors attached to the transducer head. Further, a waveform propagates in the direction of a BPM and the waveform sensor is configured to detect the waveform after it is reflected from the BPM. Additionally, a spin-polarized current is influenced by the BPM and a spin angular momentum sensor detects changes in spin angular momentum of the current. Further, a processor relates at least one property of the reflected waveform and/or current with positions of patterned bits on the BPM. The processor may then modify a timing signal and/or transducer head position to ensure that data bits are accurately written to the BPM. The end result is the ability to more quickly and accurately detect the patterned bits and synchronize a position of the transducer head with the patterned bits.Type: GrantFiled: November 5, 2009Date of Patent: June 5, 2012Assignee: Seagate Technology LLCInventors: Alan Biggar Johnston, Dieter Klaus Weller, Mark Anthony Gubbins
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Patent number: 8154813Abstract: A method of making a disc for a computer disc drive and a disc made in accordance with the same. The disc includes a deposited magnetic layer of a thin film medium over a disc-shaped substrate. A master pattern having a plurality of tracks is recorded on the disc. Each track on the disc includes a plurality of magnetic islands, each having a size and magnetic properties. The size and/or magnetic properties of one or more of the magnetic islands of each track are modulated such that each track has a modulation frequency, so as to imprint a magnetic topology on the disc. The modulation frequency of each track is either a fundamental frequency or an overtone of the fundamental frequency.Type: GrantFiled: September 2, 2008Date of Patent: April 10, 2012Assignee: Seagate Technology, LLCInventors: Dieter Klaus Weller, Hans Jurgen Richter, David S. Kuo, Kim Yang Lee
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Patent number: 8021771Abstract: A thin film structure including a plurality of grains of a first magnetic material having a first Curie temperature embedded in a matrix of a second material having a second Curie temperature, wherein the second Curie temperature is lower than the first Curie temperature and the second material comprises one or more of an oxide, a sulfide, a nitride, and a boride.Type: GrantFiled: January 8, 2010Date of Patent: September 20, 2011Assignee: Seagate Technology LLCInventors: Dieter Klaus Weller, Edward Charles Gage, Ganping Ju, Bin Lu
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Patent number: 8009545Abstract: An apparatus includes a component having a first surface, a first waveguide for directing electromagnetic radiation to a focal point adjacent to the first surface, a storage medium positioned adjacent to the first surface, a detector for detecting electromagnetic radiation reflected from the storage medium, and a structure positioned adjacent to the focal point for collecting the reflected electromagnetic radiation and for transmitting the reflected electromagnetic radiation toward the detector, wherein the structure comprises a second waveguide including a first cladding layer positioned adjacent to a first side of the first waveguide and having a first end positioned adjacent to the first surface and a second cladding layer positioned adjacent to a second side of the first waveguide and having a first end positioned adjacent to the air bearing surface.Type: GrantFiled: August 27, 2009Date of Patent: August 30, 2011Assignee: Seagate Technology LLCInventors: Dorothea Buechel, Dieter Klaus Weller, Edward Charles Gage, William Albert Challener, Christophe Daniel Mihalcea
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Publication number: 20110102930Abstract: The presently disclosed technology teaches a transducer head with a read sensor, a write pole, and one or more waveform sensors attached to the transducer head. Further, a waveform propagates in the direction of a BPM and the waveform sensor is configured to detect the waveform after it is reflected from the BPM. Additionally, a spin-polarized current is influenced by the BPM and a spin angular momentum sensor detects changes in spin angular momentum of the current. Further, a processor relates at least one property of the reflected waveform and/or current with positions of patterned bits on the BPM. The processor may then modify a timing signal and/or transducer head position to ensure that data bits are accurately written to the BPM. The end result is the ability to more quickly and accurately detect the patterned bits and synchronize a position of the transducer head with the patterned bits.Type: ApplicationFiled: November 5, 2009Publication date: May 5, 2011Applicant: Seagate Technology LLCInventors: Alan Biggar Johnston, Dieter Klaus Weller, Mark Anthony Gubbins
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Publication number: 20110086195Abstract: An apparatus includes a substrate, a magnetically soft underlayer on the substrate, and a plurality of generally cubic FePt nanoparticles on the magnetically soft underlayer, wherein the nanoparticles have a magnetization in a direction substantially normal to a surface of the magnetically soft underlayer. The FePt nanoparticles can have magnetically easy axes perpendicular to the surface of the soft underlayer.Type: ApplicationFiled: September 28, 2010Publication date: April 14, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Nisha Shukla, Timothy John Klemmer, Dieter Klaus Weller, Chao Liu
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Patent number: 7850350Abstract: The invention is related to an exterior rear-view mirror for vehicles, having a mirror head with a housing in which an adjustable mirror pane is positioned and in which at least one light source is arranged which is located in an area behind a light window of the housing. Light window is part of a turn light signal device which comprises a colour screen to influence colour appearance to turn light signal not activated.Type: GrantFiled: August 18, 2008Date of Patent: December 14, 2010Assignee: SMR Patents S.a.r.l.Inventors: Klaus Weller, Heiko Hoeber
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Patent number: 7807217Abstract: A method comprises: heating a solution of platinum acetylacetonate, Fe(CO)5, oleic acid, and oleylamine in dichlorobenzene to a reflux temperature, refluxing the solution, and using the solution to deposit FePt nanoparticles. A magnetic storage medium that includes cubic FePt particles is also provided.Type: GrantFiled: July 5, 2006Date of Patent: October 5, 2010Assignee: Seagate Technology LLCInventors: Nisha Shukla, Timothy John Klemmer, Dieter Klaus Weller, Chao Liu
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Publication number: 20100110577Abstract: A thin film structure including a plurality of grains of a first magnetic material having a first Curie temperature embedded in a matrix of a second material having a second Curie temperature, wherein the second Curie temperature is lower than the first Curie temperature and the second material comprises one or more of an oxide, a sulfide, a nitride, and a boride.Type: ApplicationFiled: January 8, 2010Publication date: May 6, 2010Applicant: Seagate Technology LLCInventors: Dieter Klaus Weller, Edward Charles Gage, Ganping Ju, Bin Lu
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Publication number: 20100080895Abstract: A method comprises: heating a solution of platinum acetylacetonate, Fe(CO)5, oleic acid, and oleylamine in dichlorobenzene to a reflux temperature, refluxing the solution, and using the solution to deposit FePt nanoparticles. A magnetic storage medium that includes cubic FePt particles is also provided.Type: ApplicationFiled: July 5, 2006Publication date: April 1, 2010Applicant: Seagate Technology LLCInventors: Nisha Shukla, Timothy John Klemmer, Dieter Klaus Weller, Chao Liu
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Publication number: 20100073809Abstract: A method of writing information to an area of a bit-patterned medium, in which a magnetized probe generates a magnetic probe field at the area of bit-patterned medium to be written, applying an oriented static magnetic field, and applying an oriented microwave field at a selected frequency, resulting in the writing of information onto the area of bit-patterned media.Type: ApplicationFiled: September 25, 2008Publication date: March 25, 2010Applicant: Seagate Technology LLCInventors: Hans Jurgen Richter, Dieter Klaus Weller, Samuel Dacke Harkness, Alexander Yulievich Dobin
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Patent number: 7678476Abstract: A thin film structure comprises a first layer including a first plurality of grains of magnetic material having a first intergranular exchange coupling, and a second layer positioned adjacent to the first layer and including a second plurality of grains of magnetic material having a second intergranular exchange coupling, wherein the second intergranular exchange coupling is larger than the first intergranular exchange coupling and wherein the Curie temperature of the first layer is greater than the Curie temperature of the second layer. A data storage system including the thin film structure is also provided.Type: GrantFiled: January 20, 2006Date of Patent: March 16, 2010Assignee: Seagate Technology LLCInventors: Dieter Klaus Weller, Edward Charles Gage, Ganping Ju, Bin Lu
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Publication number: 20100053809Abstract: A method of making a disc for a computer disc drive and a disc made in accordance with the same. The disc includes a deposited magnetic layer of a thin film medium over a disc-shaped substrate. A master pattern having a plurality of tracks is recorded on the disc. Each track on the disc includes a plurality of magnetic islands, each having a size and magnetic properties. The size and/or magnetic properties of one or more of the magnetic islands of each track are modulated such that each track has a modulation frequency, so as to imprint a magnetic topology on the disc. The modulation frequency of each track is either a fundamental frequency or an overtone of the fundamental frequency.Type: ApplicationFiled: September 2, 2008Publication date: March 4, 2010Applicant: Seagate Technology LLCInventors: Dieter Klaus Weller, Hans Jurgen Richter, David S. Kuo, Kim Yang Lee
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Publication number: 20100018028Abstract: The invention relates to a method of manufacturing a patterned media Ni stamper comprising depositing a perfluorodecyltrichlorosilane release layer. The release layer eliminates bonding at the master-stamper interface. A permanent master for manufacturing a patterned media stamper is also provided.Type: ApplicationFiled: July 23, 2008Publication date: January 28, 2010Applicant: Seagate Technology LLCInventors: Gennady Gauzner, Nobuo Kurataka, Dieter Klaus Weller, Christopher Joseph Formato
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Publication number: 20100008208Abstract: An apparatus includes a component having a first surface, a first waveguide for directing electromagnetic radiation to a focal point adjacent to the first surface, a storage medium positioned adjacent to the first surface, a detector for detecting electromagnetic radiation reflected from the storage medium, and a structure positioned adjacent to the focal point for collecting the reflected electromagnetic radiation and for transmitting the reflected electromagnetic radiation toward the detector, wherein the structure comprises a second waveguide including a first cladding layer positioned adjacent to a first side of the first waveguide and having a first end positioned adjacent to the first surface and a second cladding layer positioned adjacent to a second side of the first waveguide and having a first end positioned adjacent to the air bearing surface.Type: ApplicationFiled: August 27, 2009Publication date: January 14, 2010Applicant: Seagate Technology LLCInventors: Dorothea Buechel, Dieter Klaus Weller, Edward Charles Gage, William Albert Challener, Christophe Daniel Mihalcea
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Patent number: 7596072Abstract: An apparatus comprises a slider having an air bearing surface, a first waveguide for directing electromagnetic radiation to a focal point adjacent to the air bearing surface, a storage medium position adjacent to the air bearing surface, a detector for detecting electromagnetic radiation reflected from the storage medium, and a structure positioned adjacent to the focal point for collecting the reflected electromagnetic radiation and for transmitted the reflected electromagnetic radiation toward the detector.Type: GrantFiled: December 22, 2004Date of Patent: September 29, 2009Assignee: Seagate Technology LLCInventors: Dorothea Buechel, Dieter Klaus Weller, Edward Charles Gage, William Albert Challener, Christophe Daniel Mihalcea
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Patent number: 7521137Abstract: Patterned thin films comprise regions of relatively low thermal conductivity material separated by regions of relatively high thermal conductivity material. The low thermal conductivity regions may be provided in the form of cylinders or cuboids which are arranged in a continuous matrix of the high thermal conductivity material. The thin film may be used as thermal control layers in data recording media such as heat assisted magnetic recording media.Type: GrantFiled: January 12, 2005Date of Patent: April 21, 2009Assignee: Seagate Technology LLCInventors: Julius Kurt Hohlfeld, Yukiko Kubota, Dieter Klaus Weller, Stanko Radvan Brankovic, Xiaomin Yang, Earl Chrzaszcz Johns
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Patent number: RE40726Abstract: A magnetic recording disk is patterned into discrete magnetic and nonmagnetic regions with the magnetic regions serving as the magnetic recording data bits. The magnetic recording layer comprises two ferromagnetic films separated by a nonferromagnetic spacer film. The spacer film material composition and thickness is selected such that the first and second ferromagnetic films are antiferromagnetically coupled across the spacer film. After this magnetic recording layer has been formed on the disk substrate, ions are irradiated onto it through a patterned mask. The ions disrupt the spacer film and thereby destroy the antiferromagnetic coupling between the two ferromagnetic films. As a result, in the regions of the magnetic recording layer that are ion-irradiated the first and second ferromagnetic films are essentially ferromagnetically coupled so that the magnetic moments from the ferromagnetic films are parallel and produce a magnetic moment that is essentially the sum of the moments from the two films.Type: GrantFiled: July 29, 2003Date of Patent: June 9, 2009Assignee: Hitachi Global Storage Technologies Netherlands, B.V.Inventors: Eric Edward Fullerton, Bruce David Terris, Dieter Klaus Weller