Patents by Inventor Tae-yeon Hwang
Tae-yeon Hwang 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: 11573196Abstract: Disclosed is a gas sensor. The gas sensor comprises: a substrate; a thermoelectric layer which is disposed on the substrate and has a metal nanowire; a first electrode and a second electrode disposed to be spaced apart from each other on the thermoelectric layer; and a catalyst layer which is disposed on the first electrode and has a composite structure in which a metal particle is bonded to a carbon structure.Type: GrantFiled: April 19, 2018Date of Patent: February 7, 2023Assignee: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUSInventors: Yong Ho Choa, Tae-Yeon Hwang, Yo Seb Song, Se Il Kim, Gwang Myeong Go
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Publication number: 20210327619Abstract: Provided is a preparation method of magnetic nanostructures. The preparation method of magnetic nanostructures may comprise the steps of: preparing a source solution comprising a first precursor comprising a rare earth element, a second precursor comprising a transition metal element, and a third precursor comprising Cu; electrospinning the source solution to form preliminary magnetic nano-structures comprising a rare-earth element oxide, a transition metal oxide, and Cu oxide; and reducing the preliminary magnetic nano-structures to produce magnetic nano-structures comprising an alloy composition comprising the rare-earth element, the transition metal element, and the Cu.Type: ApplicationFiled: January 31, 2019Publication date: October 21, 2021Applicant: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUSInventors: Yong-Ho Choa, Jongryoul Kim, Jimim Lee, Tae-Yeon Hwang, Min Kyu Kang, Gyutae Lee
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Publication number: 20210327618Abstract: Provided is a method for manufacturing a magnetic nano-structure. The method for manufacturing a magnetic nano-structure may comprise the steps of: preparing a source solution containing a first precursor including a rare-earth element, a second precursor including a transition metal element, and a third precursor including Fe; electrospinning the source solution to form a preliminary magnetic nano-structure containing a rare-earth oxide, a transition metal oxide, and a Fe oxide; and reducing the preliminary magnetic micro-structure to manufacture a magnetic nano-structure containing an alloy composition of the rare-earth element, the transition metal element, and the Fe.Type: ApplicationFiled: January 31, 2019Publication date: October 21, 2021Applicant: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUSInventors: Yong-Ho Choa, Jongryoul Kim, Jimim Lee, Tae-Yeon Hwang, Min Kyu Kang, Gyutae Lee
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Publication number: 20200386698Abstract: Disclosed is a gas sensor. The gas sensor comprises: a substrate; a thermoelectric layer which is disposed on the substrate and has a metal nanowire; a first electrode and a second electrode disposed to be spaced apart from each other on the thermoelectric layer; and a catalyst layer which is disposed on the first electrode and has a composite structure in which a metal particle is bonded to a carbon structure.Type: ApplicationFiled: April 19, 2018Publication date: December 10, 2020Applicant: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY ERICA CAMPUSInventors: Yong Ho Choa, Tae-Yeon Hwang, Yo Seb Song, Se Il Kim, Gwang Myeong Go
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Patent number: 7595964Abstract: Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms for moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms.Type: GrantFiled: November 14, 2006Date of Patent: September 29, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Patent number: 7502191Abstract: An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention. Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates.Type: GrantFiled: May 10, 2005Date of Patent: March 10, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Patent number: 7420764Abstract: The invention applies to servo controllers for at least the voice coil motor of a hard disk drive. Today, many control algorithms require 80 to 90 percent of the sampling period to complete their calculation of the next control, making computation time delay no longer negligible. The invention accommodates the transport delay, such as computation time delay, into the state estimator and into the whole control system. Experimental results using a commercial hard drive, as well as simulation results, show that the invention's method effectively improves the hard disk drive control system stability by increasing the phase margin and gain margin. The invention includes the method of operating the servo-controller, as well as the apparatus implementing that method. The invention also includes hard disk drives containing servo-controllers implementing the method, and program systems residing in accessibly coupled memory to a computer within the servo controller implementing the method.Type: GrantFiled: April 3, 2006Date of Patent: September 2, 2008Assignee: Samsung Eletronics Co., Ltd.Inventors: Young-Hoon Kim, Sang Hoon Chu, Seong-Woo Kang, Dong-Ho Oh, Yun-Sik Han, Tae Yeon Hwang
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Publication number: 20070064335Abstract: Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms for moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms.Type: ApplicationFiled: November 14, 2006Publication date: March 22, 2007Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Patent number: 7136260Abstract: Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms for moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms.Type: GrantFiled: July 10, 2003Date of Patent: November 14, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Patent number: 7050267Abstract: A head-gimbal assembly of a hard disk drive includes a loadbeam connected to a pivot arm, a slider on which a magnetic head is mounted, an elastic support member having one end coupled to the loadbeam and the other free end portion at which the slider is supported, and a damper provided between the loadbeam and the slider to attenuate vibration transferred between the loadbeam and the slider.Type: GrantFiled: December 11, 2003Date of Patent: May 23, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Jeong-seok Koh, Dong-ho Oh, Tae-yeon Hwang
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Patent number: 7031105Abstract: The inventors have discovered that aerodynamic forces contribute to disk fluttering. If the flow of air about these disk surfaces is unstable, the resulting aerodynamic forces can mechanically excite the disk surfaces, causing fluttering. The invention includes media enclosures constraining such aerodynamic effects, methods of making disk drives with these enclosures, the disk drives. This includes disk drives of at most 13 millimeters in height.Type: GrantFiled: February 4, 2004Date of Patent: April 18, 2006Assignee: Samsung Electronics Co. Ltd.Inventors: Seong Hoon Kim, Tae Yeon Hwang, Tho Pham
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Patent number: 7031095Abstract: The invention applies to servo controllers for at least the voice coil motor of a hard disk drive. Today, many control algorithms require 80 to 90 percent of the sampling period to complete their calculation of the next control, making computation time delay no longer negligible. The invention accommodates the transport delay, such as computation time delay, into the state estimator and into the whole control system. Experimental results using a commercial hard drive, as well as simulation results, show that the invention's method effectively improves the hard disk drive control system stability by increasing the phase margin and gain margin. The invention includes the method of operating the servo-controller, as well as the apparatus implementing that method. The invention also includes hard disk drives containing servo-controllers implementing the method, and program systems residing in accessibly coupled memory to a computer within the servo controller implementing the method.Type: GrantFiled: July 29, 2004Date of Patent: April 18, 2006Assignee: Samsung Electronics Co., Ltd.Inventors: Young-Hoon Kim, Sang Hoon Chu, Seong-Woo Kang, Dong-Ho Oh, Yun-Sik Han, Tae Yeon Hwang
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Patent number: 6958879Abstract: An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention. Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates.Type: GrantFiled: July 10, 2003Date of Patent: October 25, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Publication number: 20050207055Abstract: An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention. Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates.Type: ApplicationFiled: May 10, 2005Publication date: September 22, 2005Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Patent number: 6947252Abstract: A hard disk drive that includes a wave stringer. The wave stringer can attenuate energy which propagates through a base plate of the disk drive. The wave stringer may be designed by initially analyzing propagation patterns of both acoustic and shock waves applied to the drive. The wave stringer is then designed, constructed and assembled to the disk drive to attenuate critical frequencies at weak points of the disk drive. The wave stringer may have a plurality of ribs designed to vary the mechanical impedance of the drive to attenuate the propagated energy.Type: GrantFiled: May 7, 2001Date of Patent: September 20, 2005Assignee: Samsung Electronics Co., Ltd.Inventors: Seong-Woo Kang, Tae-Yeon Hwang, Yun-Dik Han, Young Son, Woocheol Jeong
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Patent number: 6920018Abstract: Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR' induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms.Type: GrantFiled: July 10, 2003Date of Patent: July 19, 2005Assignee: Samsung Electronics, Co., Ltd.Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Publication number: 20050007702Abstract: Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms for moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms.Type: ApplicationFiled: July 10, 2003Publication date: January 13, 2005Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Publication number: 20050007701Abstract: Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates. The improved head gimbal assemblies include three sets of mechanisms moving the slider parallel the disk surface, when the disk surface is flat, and radially moving the slider toward the track, when the disk surface is bent. The first and third mechanisms as well as the second and third mechanisms can be used together in a head gimbal assembly. An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms.Type: ApplicationFiled: July 10, 2003Publication date: January 13, 2005Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Publication number: 20050007689Abstract: An improved and distinctive servo-controller scheme resulting in an overall improvement in PES performance, particularly when applied to hard disk drives employing the invention's TMR reduction mechanisms. The servo-controllers trade off gain in the disk vibration frequency range, in favor of, increased rejection of low frequency disturbances. This leads to the lowest PES statistics, when applied to hard disk drives with the TMR reduction mechanisms of the invention. Improved head gimbal assemblies reducing TMR (Track Mis-Registration) in a hard disk drive are provided. These head gimbal assemblies are as mechanically simple as contemporary head gimbal assemblies, support parallel flying sliders over flat disk surfaces, and reduce TMR induced by disk vibration. They are easier to build, more reliable, and cost less to make, than other known approaches at comparable track densities and rotational rates.Type: ApplicationFiled: July 10, 2003Publication date: January 13, 2005Inventors: Dong-Ho Oh, Seong-Woo Kang, Yun-Sik Han, Young-Hoon Kim, Myeong-Eop Kim, Tae-Yeon Hwang, Jae-Won Kim
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Publication number: 20040190202Abstract: A head-gimbal assembly of a hard disk drive includes a loadbeam connected to a pivot arm, a slider on which a magnetic head is mounted, an elastic support member having one end coupled to the loadbeam and the other free end portion at which the slider is supported, and a damper provided between the loadbeam and the slider to attenuate vibration transferred between the loadbeam and the slider.Type: ApplicationFiled: December 11, 2003Publication date: September 30, 2004Applicant: Samsung Electronics Co., Ltd.Inventors: Jeong-Seok Koh, Dong-Ho Oh, Tae-Yeon Hwang