Patents by Inventor Bogdan Florin Valcu
Bogdan Florin Valcu 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: 11699461Abstract: The present embodiments relate to a thermally-assisted magnetic recording (TAMR) head. A magnetic assist current can be applied to the TAMR head to assist in reducing timing jitter as the TAMR head interacts with a magnetic recording material. The TAMR head can include a main write pole including a tip portion and configured to direct a magnetic field for interacting with a magnetic recording medium. The TAMR head can include a laser diode to heat the magnetic recording medium and a dynamic fly height (DFH) heating element for dynamically controlling a height of the main write pole. The heating element can be of a parallel bias circuit that directs a direct current (DC) bias current flow along an electrical path from the magnetic yoke element to the tip portion of the main write pole adjacent to an air bearing surface (ABS).Type: GrantFiled: April 29, 2022Date of Patent: July 11, 2023Assignee: Headway Technologies, Inc.Inventors: Bogdan Florin Valcu, Tobias Maletzky, Weihao Xu, Alain Truong, Yue Liu
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Patent number: 9299379Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.Type: GrantFiled: January 22, 2014Date of Patent: March 29, 2016Assignee: Seagate Technology LLCInventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma
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Publication number: 20140212690Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.Type: ApplicationFiled: January 22, 2014Publication date: July 31, 2014Applicant: Seagate Technology LLCInventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma
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Patent number: 8715840Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.Type: GrantFiled: February 13, 2012Date of Patent: May 6, 2014Assignee: Seagate Technology LLCInventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma
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Patent number: 8455118Abstract: An apparatus may include a composite soft underlayer and a perpendicular magnetic recording layer overlying the composite soft underlayer. The composite soft underlayer may include a growth template layer, a negative magnetic anisotropy layer overlying the growth template layer, and a magnetically soft layer overlying the negative magnetic anisotropy layer. In some embodiments, the negative magnetic anisotropy layer includes a plurality of grains, and substantially all the grains have negative magnetic anisotropy along an axis substantially perpendicular to a major plane of the composite soft underlayer. In some embodiments, the negative magnetic anisotropy layer includes a thickness of less than or equal to about 3 nm.Type: GrantFiled: August 31, 2010Date of Patent: June 4, 2013Assignee: Seagate Technology LLCInventors: Kai-Chieh Chang, Li Tang, Shanghsien S. Rou, Connie Chunling Liu, Bogdan Florin Valcu, Wen Jiang, Tao Zhang
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Publication number: 20120141834Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.Type: ApplicationFiled: February 13, 2012Publication date: June 7, 2012Applicant: SEAGATE TECHNOLOGY LLCInventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma
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Publication number: 20120052327Abstract: An apparatus may include a composite soft underlayer and a perpendicular magnetic recording layer overlying the composite soft underlayer. The composite soft underlayer may include a growth template layer, a negative magnetic anisotropy layer overlying the growth template layer, and a magnetically soft layer overlying the negative magnetic anisotropy layer. In some embodiments, the negative magnetic anisotropy layer includes a plurality of grains, and substantially all the grains have negative magnetic anisotropy along an axis substantially perpendicular to a major plane of the composite soft underlayer.Type: ApplicationFiled: August 31, 2010Publication date: March 1, 2012Applicant: Seagate Technology LLCInventors: Kai-Chieh Chang, Li Tang, Shanghsien S. Rou, Connie Chunling Liu, Bogdan Florin Valcu, Wen Jiang, Tao Zhang
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Patent number: 8114470Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.Type: GrantFiled: November 26, 2008Date of Patent: February 14, 2012Assignee: Seagate Technology LLCInventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma
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Publication number: 20110003175Abstract: A perpendicular magnetic recording layer may include a hard granular layer, an exchange break layer formed on the hard granular layer, and a soft granular layer formed on the exchange break layer. In some embodiments, the exchange break layer may consist essentially of ruthenium. In some embodiments, the perpendicular magnetic recording layer may include n magnetic layers and n?1 exchange break layers, where n is greater than or equal to three, and where the n?1 exchange break layers alternate with the n magnetic layers in the magnetic recording layer.Type: ApplicationFiled: January 7, 2010Publication date: January 6, 2011Applicant: Seagate Technology LLCInventors: Bogdan Florin Valcu, Qixu Chen, Connie Chunling Liu, Chun Wang, Kueir-Weei Chour, Shoutao Wang
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Publication number: 20100129685Abstract: Aspects include recording media with enhanced areal density through reduction of head media spacing, head keeper spacing, or head to soft underlayer spacing. Such aspects comprise replacing currently non-magnetic components of devices, such as interlayers and overcoats with components and compositions comprising magnetic materials. Other aspects relate to magnetic seed layers deposited within a recording medium. Preferably, these aspects, embodied as methods, systems and/or components thereof reduce effective magnetic spacing without sacrificing physical spacing.Type: ApplicationFiled: November 26, 2008Publication date: May 27, 2010Applicant: SEAGATE TECHNOLOGY LLCInventors: Kaizhong Gao, Bin Lu, Bogdan Florin Valcu, Xiaoding Ma