Patents by Inventor Cheol-soon Kim
Cheol-soon Kim 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: 20110176241Abstract: A hard disk drive includes a hub on which a plurality of disks are rotatably assembled, and a spacer assembled to the hub to be alternately arranged with the disks to separate the disks and having at least one area of an inner wall surface that elastically contacts and is pressed against an outer wall surface of the hub for centering with respect to the hub.Type: ApplicationFiled: November 10, 2010Publication date: July 21, 2011Applicant: Samsung Electronics Co., LtdInventors: Kyung Ho KIM, Ha Yong Kim, Cheol-Soon Kim
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Publication number: 20100320564Abstract: A nanowire memory device and a method of manufacturing the same are provided. A memory device includes: a substrate; a first electrode formed on the substrate; a first nanowire extending from an end of the first electrode; a second electrode formed over the first electrode to overlap the first electrode; and a second nanowire extending from an end of the second electrode corresponding to the end of the first electrode in the same direction as the first nanowire, wherein an insulating layer exists between the first and second electrodes.Type: ApplicationFiled: August 31, 2010Publication date: December 23, 2010Applicants: SAMSUNG ELECTRONICS CO., LTD., Seoul National University Industry FoundationInventors: Jin-gyoo Yoo, Cheol-soon Kim, Jung-hoon Lee
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Publication number: 20100297364Abstract: A servo pattern forming method of a hard disk drive includes magnetically printing a reference servo pattern, which has different features according to zones divided along a radial direction of a disk, on the disk, and recording a final servo pattern in the disk on the basis of the reference servo pattern. As a result, the quality of a final servo pattern can be enhanced by preventing an amplitude drop that arises in an ID zone of the disk when a reference servo pattern is recorded using a conventional servo track writer.Type: ApplicationFiled: May 20, 2010Publication date: November 25, 2010Applicant: Samsung Electronics Co., Ltd.Inventors: Yoon Chul CHO, Cheol-Soon Kim, Ha Yong Kim
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Patent number: 7829886Abstract: A nonvolatile carbon nanotube memory device using multiwall carbon nanotubes and methods of operating and fabricating the same are provided. The nonvolatile memory device may include a substrate, at least one first electrode on the substrate, first and second vertical walls on the at least one first electrode spaced from each other, a multiwall carbon nanotube on the at least one first electrode between the first and second vertical walls, second and third electrodes on the first and second vertical walls respectively and at least one fourth electrode spaced a variable distance D (where D?0) from the multiwall carbon nanotubes.Type: GrantFiled: January 3, 2007Date of Patent: November 9, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Leonid Maslov, Jin-Gyoo Yoo, Cheol-Soon Kim
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Patent number: 7821813Abstract: A nanowire memory device and a method of manufacturing the same are provided. A memory device includes: a substrate; a first electrode formed on the substrate; a first nanowire extending from an end of the first electrode; a second electrode formed over the first electrode to overlap the first electrode; and a second nanowire extending from an end of the second electrode corresponding to the end of the first electrode in the same direction as the first nanowire, wherein an insulating layer exists between the first and second electrodes.Type: GrantFiled: March 7, 2007Date of Patent: October 26, 2010Assignees: Samsung Electronics Co., Ltd., Seoul National University Industry FoundationInventors: Jin-gyoo Yoo, Cheol-soon Kim, Jung-hoon Lee
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Publication number: 20100265614Abstract: A method of writing a servo pattern in a hard disk drive includes manufacturing a master pattern, and writing the reference servo pattern to the disk by using the master pattern and a magnet for magnetizing the disk. The master pattern includes a plurality of ammonite cycles that have substantially the same pattern as the reference servo pattern and are radially formed from the outside toward the inside of the disk. A final servo pattern may be written using the reference servo pattern.Type: ApplicationFiled: April 15, 2010Publication date: October 21, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ha Yong KIM, Cheol-Soon KIM, Yong-Soo KIM, Sang-Hyun PARK
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Patent number: 7782563Abstract: A hard disk drive (HDD) includes a spindle motor, an actuator, a static eccentricity sensor, a monitor and a central controller. The spindle motor includes a rotary body and a static body adapted to support the rotary body, where the spindle motor is adapted to rotate a disk. The actuator is adapted to move a read/write head over the disk. The static eccentricity sensor is adapted to measure static eccentricity associated with the rotary body. The monitor is adapted to monitor the measured static eccentricity and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state. The central controller is adapted to initiate an unloading/parking operation for the read/write head in response to the free-fall signal.Type: GrantFiled: March 18, 2009Date of Patent: August 24, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk Han, Cheol-soon Kim, Gun-hee Jang, Sang-jin Park
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Patent number: 7706105Abstract: A suspension assembly of an actuator of a hard disk drive prevents collisions with a data storage disk of the drive. The suspension assembly includes a load beam, a bracket having a rear end at which the bracket is coupled to the load beam and a flexure, a slider that is attached to the bracket and carries the read/write head of the hard disk drive, and a limiting mechanism capable of selectively attaching and detaching a respective portion of the bracket to and from the load beam during operation. The load beam has a dimple projecting toward the bracket and which normally contacts a first surface of the bracket. The slider is attached to a second surface of the bracket opposite the first surface. The limiting mechanism attaches a portion of the bracket bearing the slider to the load beam when the read/write head is unloaded from the disk. Therefore, the wobbling of the slider is suppressed during the unloading operation.Type: GrantFiled: January 10, 2007Date of Patent: April 27, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Leonid Maslov, Cheol-soon Kim, Jin-gyoo Yoo, Haeng-soo Lee
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Patent number: 7677805Abstract: A fluid dynamic bearing is constructed to support stably a rotating body to which a non-uniform force is applied, and a hard disk drive (HDD) employing the fluid dynamic bearing is provided. The fluid dynamic bearing includes a journal bearing part supporting a rotary shaft in a radial direction of the rotary shaft, a thrust part formed at one end of the rotary shaft, a thrust bearing part facing the thrust part and supporting the rotary shaft in a longitudinal direction of the rotary shaft, and a plurality of grooves formed on a surface of the thrust bearing part and/or the thrust part. The plurality of grooves include a first groove group including a plurality of grooves having the same shape and arrangement, and a second groove group adjacent to the first groove group and including at least one groove asymmetric with respect to the grooves of the first groove group.Type: GrantFiled: October 21, 2005Date of Patent: March 16, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk Han, Dong-ho Oh, Yong-kyu Byun, Cheol-soon Kim, Jeong-seok Koh, Nam-hoon Lee, Ja-choon Koo
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Publication number: 20100061020Abstract: A flexure suppresses the vibration of a slider bearing a magnetic read/write head. The flexure has a cross beam, a slider support that supports the slider and is in turn supported like a cantilever by the cross beam but so as to be elastic, a rear vibration absorber protruding from a free end of the slider support in a direction away from the cross beam, and a forward vibration absorber protruding from the cross beam in a direction opposite to that in which the rear vibration absorber protrudes from the free end of the slider support. In a head suspension assembly, an end of the flexure is fixed to a load beam. Also, the load beam is coupled to a base plate by, for example, a hinge. The head suspension assembly is carried by a swing arm in a hard disk drive. The swing arm is mounted to a base so as to be rotatable to position the magnetic read/write head over a data storage disk of the drive.Type: ApplicationFiled: September 1, 2009Publication date: March 11, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Leonid Maslov, Cheol-soon Kim, Haeng-soo Lee
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Publication number: 20090316295Abstract: A method of servo writing for each track of a magnetic recording medium divided into a plurality of circular tracks including performing a phase adjustment operation by controlling a phase of a recording current according to a skew angle formed by a magnetic head and a track of the magnetic recording medium, and writing a servo pattern when the magnetic recording medium is magnetized using a magnetic head so as to have a magnetized pattern corresponding to a servo pattern.Type: ApplicationFiled: June 12, 2009Publication date: December 24, 2009Applicant: Samsung Electronics Co., LtdInventors: Yong-su KIM, Jae-chul SHIM, Cheol-soon KIM
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Publication number: 20090262459Abstract: A slider of a hard disk drive can include a slider main body on which a read/write head is mounted, the read/write head configured to write data to a disk and to read data from the disk by being lifted a predetermined height from a surface of the disk by a lift force when the disk is rotating, and a lift force generation unit provided in an area of the slider main body proximate to the read/write head to improve the lift force of the slider main body with respect to the disk.Type: ApplicationFiled: April 22, 2009Publication date: October 22, 2009Applicant: Samsung Electronics Co., Ltd.Inventors: Leonid MASLOV, Jin Gyoo Yoo, Cheol-Soon Kim
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Publication number: 20090225466Abstract: A hard disk drive (HDD) includes a spindle motor, an actuator, a static eccentricity sensor, a monitor and a central controller. The spindle motor includes a rotary body and a static body adapted to support the rotary body, where the spindle motor is adapted to rotate a disk. The actuator is adapted to move a read/write head over the disk. The static eccentricity sensor is adapted to measure static eccentricity associated with the rotary body. The monitor is adapted to monitor the measured static eccentricity and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state. The central controller is adapted to initiate an unloading/parking operation for the read/write head in response to the free-fall signal.Type: ApplicationFiled: March 18, 2009Publication date: September 10, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-hyuk HAN, Cheol-soon KIM, Gun-hee JANG, Sang-jin PARK
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Patent number: 7525751Abstract: Embodiments of the invention provide a hard disk drive (HDD) adapted to detect when an HDD is in a free-fall state and park a head prior to impact. The HDD comprises a spindle motor comprising a rotary body and adapted to rotate a disk, wherein the disk is adapted to store data; an actuator adapted to move a read/write head to a desired position above the disk in order to read/write data; and a flying height sensor adapted to measure a flying height of the rotary body in real time. The HDD further comprises a monitor adapted to monitor the measured flying height and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state; and a central controller adapted to initiate an operation for parking the read/write head in response to the free-fall signal.Type: GrantFiled: November 13, 2006Date of Patent: April 28, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk Han, Cheol-soon Kim, Gun-hee Jang, Sang-jin Park
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Patent number: 7511920Abstract: A spindle motor assembly includes a spindle motor having a shaft and a hub that rotates on the shaft, and a hard disk having a data storage medium mounted in the form of a whole disk, and a fastener attached to the center of a bottom surface of the disk-shaped data storage medium that faces the spindle motor. The fastener is a screw or a nut. In the case in which the fastener is a screw, a head of the screw is attached to the bottom surface of the hard disk, and the body of the screw is received in a screw hole in the upper portion of the shaft of the spindle motor. In the case in which the fastener is a nut, the nut is engaged with an external thread on an outer circumferential surface of the hub of the spindle motor.Type: GrantFiled: July 28, 2006Date of Patent: March 31, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-kyu Byun, Min-pyo Hong, Cheol-soon Kim, No-yeol Park
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Patent number: 7483233Abstract: Provided are a voice coil motor (VCM) driving method for an HDD, related head unloading apparatus and recording media suitable for implementing the driving method. The method of driving a VCM to park a head on a ramp in the HDD includes; driving the VCM using a first driving voltage until the head moves to a first position; and thereafter driving the VCM using a second driving voltage higher than the first driving voltage during a first time period sufficient cause the head to rise along a first incline of the ramp.Type: GrantFiled: December 12, 2006Date of Patent: January 27, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Cheol-soon Kim, Sang-min Suh
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Patent number: 7349183Abstract: An actuator arm of an actuator assembly includes a 4-bar linkage structure defined by a trapezoidal shaped opening formed between a front end of the actuator arm and a pivot shaft. A first rounded extension portion and a second rounded extension portion are formed at two corners adjacent to the pivot shaft of the opening, respectively, and a third rounded extension portion is formed at two corners adjacent to a front end of the opening, and hinges H1, H2, H3 and H4 are formed at the actuator arm by the first, second and third extension portions. Design factors determining a shape of the opening are optimized to meet the following relations for the structure of the 4-bar linkage: W(cos ??1)+Z(cos ??1)=?x=0, W sin ?+Z sin ?=?y=0.Type: GrantFiled: November 2, 2005Date of Patent: March 25, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-ho Oh, Yong-kyu Byun, Cheol-soon Kim, Haeng-soo Lee
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Patent number: 7321479Abstract: A method for writing a spiral reference servo signal suitable for a self-servo writing method in a hard disk drive includes writing a first reference pattern in an end direction of a spiral reference servo signal writing concentrically on the disk; writing a spiral reference servo signal on a current spiral track from a reference writing start position of the current spiral track; detecting a moving angle of a head to the first reference pattern, which corresponds to a distance from the reference writing start position to a reference writing end position of the spiral reference servo signal in the case that thermal expansion of the disk does not exist; compensating for a driving speed of the head with reference to the detected moving angle of the head; and writing the spiral reference servo signal on a next spiral track at a compensated driving speed of the head.Type: GrantFiled: November 18, 2005Date of Patent: January 22, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Cheol-soon Kim, Jun-seok Shim, Sung-won Park
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Publication number: 20070268739Abstract: A nanowire memory device and a method of manufacturing the same are provided. A memory device includes: a substrate; a first electrode formed on the substrate; a first nanowire extending from an end of the first electrode; a second electrode formed over the first electrode to overlap the first electrode; and a second nanowire extending from an end of the second electrode corresponding to the end of the first electrode in the same direction as the first nanowire, wherein an insulating layer exists between the first and second electrodes.Type: ApplicationFiled: March 7, 2007Publication date: November 22, 2007Applicants: SAMSUNG ELECTRONICS CO., LTD., Seoul National University Industry FoundationInventors: Jin-gyoo Yoo, Cheol-soon Kim, Jung-hoon Lee
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Publication number: 20070231988Abstract: A method of fabricating a nanowire memory device, and a system of controlling nanowire formation used in the same method are provided. In the method of fabricating a nanowire memory device which includes a substrate; an electrode formed on the substrate and insulated from the substrate; and a nanowire having its one end connected with the electrode and formed at a given length, the method comprises: forming an electrode and a dummy electrode to be paired with the electrode on the substrate; forming the nanowire between the electrode and the dummy electrode while measuring a current flowing between the electrode and the dummy electrode, and cutting power applied between the electrode and the dummy electrode when the current measured is a given value; and removing the dummy electrode.Type: ApplicationFiled: March 2, 2007Publication date: October 4, 2007Applicants: SAMSUNG ELECTRONICS CO., LTD., SEOUL NATIONAL UNIVERSITY INDUSTRY FOUNDATIONInventors: Jin-gyoo Yoo, Cheol-soon Kim, Jung-hoon Lee