Samsung Electronics Co., Ltd.

Jong-yun Yun

Joo-Hyun Lee

Cheol Kwon

Joo-Won Cho

Jin-young Choi

Sang-hoon Chu

Jung-hoon Kim

Sun-hee Lee

Joon-young Oh

Won-hwa Lee

Do-il Kong

Jae-beom Byun

In-bo Shim

Sung-chul Hur

Yeong-kyun Lee

Jae-jin Lee

Kwang-Hoon Park

Hee-youb Kang

Jae-Bum Byun

A secondary memory device includes: a substrate and a housing configured to accommodate at least a part of the substrate. The substrate has upper and lower opposed surfaces and includes a first region in which a first semiconductor device is mounted on the upper surface and a second region in which a second semiconductor device is mounted on the upper surface. The housing includes a first sub-housing covering the upper surface of the substrate at the first region and the first semiconductor device. The first sub-housing does not extend to cover the upper surface of the substrate at the second region.

Secondary memory device

A multi-stacked structure of semiconductor packages includes a plurality of substrates stacked in a vertical direction, semiconductor packages mounted on each substrate of the plurality of the substrates, a heat release column extending commonly through the plurality of the substrates and overlapping at least one semiconductor package serving as a heat generation source among the semiconductor packages in the vertical direction, and a heat dissipation part thermally connected to one end of the heat release column.

Multi-stacked structures of semiconductor packages

A secondary memory device includes a substrate configured to receive power from an external power source, at least one of non-volatile memory devices mounted on the substrate, a control device mounted on the substrate to control the non-volatile memory devices, and a secondary battery electrically connected to the substrate and configured to supply second power to the substrate when a power supply from the external power source is abnormally stopped.

Secondary memory device and electronic system employing the same

An apparatus and a method of detecting an error symbol in a data storage apparatus so that an error correcting performance of an error correction decoder. The error symbol detecting apparatus includes an equalizer equalizing a signal transmitted to a channel using a channel equalization characteristic that is suitable for a corresponding system, a data detector to detect data from the signal output from the equalizer, a modeling tool designed to have the same characteristics corresponding to a partial response (PR) target polynomial applied to the system, a correlation evaluation information generating unit to generate correlation evaluation information based on a correlation degree between an actual output of the equalizer and a target output of the modeling tool, and an error symbol determination unit to determine an order of probability of error generation of the symbols based on the correlation evaluation information, and to determine a predetermined number of symbols having a high probability of generating errors corresponding to the order of probability of error generation as error generating symbols.

Apparatus and method of detecting error symbol, and disk drive apparatus using the same

Provided is a method and an apparatus for controlling a write parameter according to a voltage variation. The method for controlling the write parameter includes monitoring a voltage supplied to a pre-amplifier before performing a write operation and adjusting the write parameter supplied to the pre-amplifier based on the monitoring result. Controlling the write parameter includes reading a predetermined write parameter from a write parameter table based on the monitoring result, and adjusting the read write parameter to the write parameter which will be supplied to the pre-amplifier.

Method and apparatus for controlling write parameter according to voltage variation

A method of determining a head characteristic, i.e. determining whether a head has a write characteristic stronger or weaker than that of a normal write head, and a recording medium suitable to perform the method. The method includes detecting a first error rate by writing data and then reading the written data without control pole tip protrusion (PTP) contralto compensate for thermal pole tip protrusion (TPTP) in a state where the head is fully cooled, detecting a second error rate by writing data and then reading the written data with the PTP control in the state where the head is fully cooled, calculating a difference between the first error rate and the second error rate, and determining based on the calculated error rate difference whether the head is a strong write head having a stronger write characteristic than that of the normal write head or a weak write head having a weaker write characteristic than that of the normal write head. Accordingly, since an adjacent track write (ATW) problem, which may occur due to a narrow gap between adjacent tracks, and a weak write problem, which may occur due to a short media recording length per data bit, can be simultaneously considered, high reliability can be secured in terms of recording and reproducing in an HDD.

Method of determining head characteristic of HDD and recording medium to perform the same

A hard disc drive (HDD) data read control apparatus, medium, and method reading data from a disc having non-uniform track-to-track spacing. The data read control method of the HDD, in which data is read from a disc including non-uniform track-to-track spacing, includes seeking a target track by adopting an off track amount applied to a previously followed track, and reading the data while following the sought target track. Accordingly, production yield can be increased by making failure processing unnecessary even if a track-to-track spacing of a HDD is non-uniform.

HDD data read control apparatus, medium, and method

A hard disk drive (HDD) includes a disk, a spindle motor assembly for rotating the disk, an arm assembly for reading data from and/or reproducing data onto the disk, integrated circuits (ICs) for controlling the spindle motor and arm assemblies, a printed circuit board (PCB) having integrated circuit (IC) mounting areas on which the ICs are mounted and a through-hole open to at least one of the IC mounting areas and a base to which the spindle motor assembly, arm assembly and PCB are assembled, the base including a heat dissipation column contacting the PCB opposite the IC mounting area so as to transfer heat generated by the IC to the base. The heat dissipation column includes a heat dissipation body and at least one hemispherical protrusion protruding from a surface of the body into the through-hole and into contact with the PCB. The base has a simple structure that is easy to manufacture, and the heat dissipation column of the base does not affect the overall size of the HDD and can effectively dissipate the heat generated by the IC during the operation of the HDD.

Support structure of electronic device and hard disk drive comprising the same

A disk drive, medium, and method controlling a write parameter of a disk drive are provided. The method of compensating for a write parameter, in order to control a write operation of a disk drive, can includes measuring a bit error rate in an optimum write condition and a bit error rate in a weak write condition for a head, and calculating a compensation value for a write parameter corresponding to a difference between the bit error rates in an optimum write condition and the bit error rate in the weak write condition. In a method, according to embodiments of the present invention, a compensation value alpha for compensating a write parameter for a predetermined period of time after the start of a write operation can be generated to prevent a weak write phenomenon at the beginning of the write operation.

Disk drive, medium and method of compensating for a write parameter

A method of and an apparatus for recording data on a hard disk drive, and a storage medium containing a program for executing the method. Data is recorded on a track in a recording region and an address of a next track to be recorded with the data is determined so that the next track to be recorded with the data is located more than one track away from the previously recorded track so that the recorded data has robustness to adjacent track erasure and overwrite erasure.

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Suwon-si, South Korea

Jong-yun Yun