Patents by Inventor Mariana R. Munteanu
Mariana R. Munteanu 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: 9123844Abstract: Photovoltaic structures for the conversion of solar irradiance into electrical free energy. In a particular implementation, a photovoltaic cell includes a granular semiconductor and oxide layer with nanometer-size absorber semiconductor grains surrounded by a matrix of oxide. The semiconductor and oxide layer is disposed between electron and hole conducting layers. In some implementations, multiple semiconductor and oxide layers can be deposited.Type: GrantFiled: April 22, 2013Date of Patent: September 1, 2015Assignee: ZETTA RESEARCH AND DEVELOPMENT LLC—AQT SERIESInventors: Mariana R. Munteanu, Erol Girt
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Patent number: 8993073Abstract: An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.Type: GrantFiled: July 14, 2008Date of Patent: March 31, 2015Assignee: Seagate Technology LLCInventors: Weilu Xu, Miaogen Lu, Mariana R. Munteanu, Michael Z. Wu, Shanghsien Alex Rou, Steve Kuo-Hsing Hwang, Ed Yen
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Patent number: 8709619Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: GrantFiled: August 31, 2012Date of Patent: April 29, 2014Assignee: Seagate Technology LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Patent number: 8697260Abstract: A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO2) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.Type: GrantFiled: July 25, 2008Date of Patent: April 15, 2014Assignee: Seagate Technology LLCInventors: Zhong Stella Wu, Samuel Dacke Harkness, IV, Mariana R. Munteanu, Qixu Chen, Connie Chunling Liu
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Patent number: 8673464Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: GrantFiled: August 31, 2012Date of Patent: March 18, 2014Assignee: Seagate Technology LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Publication number: 20130228217Abstract: Photovoltaic structures for the conversion of solar irradiance into electrical free energy. In a particular implementation, a photovoltaic cell includes a granular semiconductor and oxide layer with nanometer-size absorber semiconductor grains surrounded by a matrix of oxide. The semiconductor and oxide layer is disposed between electron and hole conducting layers. In some implementations, multiple semiconductor and oxide layers can be deposited.Type: ApplicationFiled: April 22, 2013Publication date: September 5, 2013Applicant: Zetta Research and Development LLC-AQT SeriesInventors: Mariana R. MUNTEANU, Erol GIRT
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Patent number: 8426722Abstract: Photovoltaic structures for the conversion of solar irradiance into electrical free energy. In a particular implementation, a photovoltaic cell includes a granular semiconductor and oxide layer with nanometer-size absorber semiconductor grains surrounded by a matrix of oxide. The semiconductor and oxide layer is disposed between electron and hole conducting layers. In some implementations, multiple semiconductor and oxide layers can be deposited.Type: GrantFiled: October 24, 2007Date of Patent: April 23, 2013Assignee: Zetta Research and Development LLC—AQT SeriesInventors: Mariana R. Munteanu, Erol Girt
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Publication number: 20130045394Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: ApplicationFiled: August 31, 2012Publication date: February 21, 2013Applicant: SEAGATE TECHNOLOGY LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Patent number: 8373060Abstract: Photovoltaic structures for the conversion of solar irradiance into electrical free energy. In particular implementations, the novel photovoltaic structures can be fabricated using low cost and scalable processes, such as magnetron sputtering. In a particular implementation, a photovoltaic cell includes a photoactive conversion layer comprising one or more granular semiconductor and oxide layers with nanometer-size semiconductor grains surrounded by a matrix of oxide. The semiconductor and oxide layer can be a disposed between electrode layers. In some implementations, multiple semiconductor and oxide layers can be deposited. These so-called semiconductor and oxide layers absorb sun light and convert solar irradiance into electrical free energy.Type: GrantFiled: October 24, 2007Date of Patent: February 12, 2013Assignee: Zetta Research and Development LLC—AQT SeriesInventors: Mariana R. Munteanu, Erol Girt
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Patent number: 8257844Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: GrantFiled: December 8, 2010Date of Patent: September 4, 2012Assignee: Seagate Technology LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Publication number: 20110076515Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: ApplicationFiled: December 8, 2010Publication date: March 31, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Patent number: 7867637Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: GrantFiled: November 17, 2008Date of Patent: January 11, 2011Assignee: Seagate Technology LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Publication number: 20100124671Abstract: A low-coupling perpendicular magnetic recording media comprising a magnetic storage layer and at least one low saturation magnetization layer. The magnetic storage layer has a saturation magnetization between about 400-900 emu/cm3 and the at least one low saturation magnetization layer has a saturation magnetization below that of the magnetic storage layer.Type: ApplicationFiled: November 17, 2008Publication date: May 20, 2010Applicant: Seagate Technology LLCInventors: Erol Girt, Hans Jurgen Richter, Mariana R. Munteanu, Thomas Nolan
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Publication number: 20100020441Abstract: A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO2) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.Type: ApplicationFiled: July 25, 2008Publication date: January 28, 2010Applicant: Seagate Technology LLCInventors: Zhong Stella Wu, Samuel Dacke Harkness, Mariana R. Munteanu, Qixu Chen, Connie Chunling Liu
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Publication number: 20100007989Abstract: An embodiment of the invention relates to a perpendicular magnetic recording medium comprising (1) a substrate, (2) an interlayer comprising hexagonal columns and (3) a magnetic layer, wherein the magnetic layer is deposited applying a bias voltage to the substrate such that the magnetic layer comprises magnetic grains having substantially no sub-grains within the magnetic layer, and the magnetic layer has perpendicular magnetic anisotropy.Type: ApplicationFiled: July 14, 2008Publication date: January 14, 2010Applicant: SEAGATE TECHNOLOGY LLCInventors: Weilu Xu, Miaogen Lu, Mariana R. Munteanu, Michael Z. Wu, Shanghsien Alex Rou, Steve Kuo-Hsing Hwang, Ed Yen
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Publication number: 20080213628Abstract: A perpendicular magnetic recording medium comprising a substrate, an underlayer, a Ta-containing seedlayer, a magnetic layer, wherein the underlayer comprises a soft magnetic material and the Ta-containing seedlayer is between the underlayer and the magnetic layer, and a process for improving corrosion resistance of the recording medium and for manufacturing the recording medium are disclosed.Type: ApplicationFiled: March 1, 2007Publication date: September 4, 2008Applicant: SEAGATE TECHNOLOGY LLCInventors: Abebe Hailu, Raj Thangaraj, Miaogen Lu, Qixu Chen, Michael Z. Wu, Mariana R. Munteanu, Kuo-Hsing Hwang
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Patent number: 7157161Abstract: The Hr and SNR of a magnetic recording medium are increased and the signal pulse narrowed by employing a tri-layer underlayer structure containing Cr or a Cr alloy wherein the second underlayer contains Cr and B, the first underlayer preferably contains substantially pure Cr, and the third underlayer preferably contains a ternary alloy of Cr.Type: GrantFiled: May 27, 2004Date of Patent: January 2, 2007Assignee: Seagate Technology LLCInventors: Abebe Hailu, Charles Changging Chen, Mariana R. Munteanu