Abstract: 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.

Abstract: A mobile terminal including a terminal case, a microphone located within the terminal case, and a sound guide unit, is provided. The terminal case includes a first case member, a second case member, and a frame member located between the first case member and the second case member. The frame member includes a microphone hole formed on an outer surface thereof for guiding a sound into the terminal case in a first direction. The microphone includes a sound receiving portion disposed in a second direction different from the first direction, for receiving the sound. And the sound guide unit is located between the microphone hole and the sound receiving portion of the microphone, the sound guide unit guiding the sound, which has passed through the microphone hole, along the first direction and the second direction, toward the sound receiving portion of the microphone.

Abstract: 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.

Abstract: A method of erasing a servo pattern of a hard disk drive includes reading a servo pattern recorded on a disk, generating an erase pattern to erase the servo pattern based on the servo pattern obtained in the reading of the servo pattern, and erasing the servo pattern by using the erase pattern while the disk is rotated. The servo pattern recorded on the hard disk drive may be uniformly erased. Also, a stabilization time to stabilize a read/write head after the position control of the read/write head that is needed when a servo writer is used may be avoided so that a time to erase a servo pattern may be reduced.

Abstract: 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.

Abstract: Disclosed is a mobile terminal including, first and second bodies rotatably coupled to each other, and a driving unit configured to allow a relative rotation of the first and second bodies between a closed configuration and an open configuration, the first and second bodies being overlaid by each other in the closed configuration and rotated away from each other in the open configuration, wherein the driving unit includes rotation motion units connected to each of the first and second bodies and configured to generate the relative rotation, and slide motion units cooperatively operating with the rotation motion unit and configured to relatively slide the first and second bodies with respect to the driving unit between the closed configuration and the open configuration.

Abstract: A mobile communication device for receiving and transmitting wireless communication signals including a body having a border portion, a display supported by the body, a touch screen adjacent the display and defining an exterior surface of the mobile communication device such that the display is visible through the touch screen, the touch screen transferring an input signal through electrodes disposed at an edge portion of the touch screen, and an electrode covering layer located above the electrodes of the touch screen. The border portion of the body and the outermost portion of the touch screen are substantially coplanar.

Abstract: A method of manufacturing a hard disk drive includes measuring an imbalance value including an imbalance position with respect to a rotation center of a rotation shaft of the hub, with respect to each of a plurality of disks installed on a hub of a spindle motor to rotate the disks, allowing different imbalance positions of the disks to approach each other in a circumferential direction by applying an impact to the hard disk drive, and correcting the imbalance value by applying an impact to the hard disk drive in a direction opposite to the imbalance positions of the disks approaching each other with respect to the rotation shaft of the hub, to move the imbalance positions of the disks approaching each other in a radial direction of the disks with respect to the rotation center of the rotation shaft of the hub.

Abstract: A hard disk drive includes a housing including a base member and a cover member, a spindle motor disposed in the housing, a data storage disk disposed on the spindle motor, an actuator disposed in the housing to move a read/write head to a position on the data storage disk, a clock signal providing unit disposed on the data storage disk to provide a clock signal of the data storage disk, a position signal providing unit disposed on the actuator to provide a position signal of the actuator, and first and second windows disposed in the housing to correspond to the clock signal providing unit and the position signal providing unit.

Abstract: A mobile terminal including a terminal case, a microphone located within the terminal case, and a sound guide unit, is provided. The terminal case includes a first case member, a second case member, and a frame member located between the first case member and the second case member. The frame member includes a microphone hole formed on an outer surface thereof for guiding a sound into the terminal case in a first direction. The microphone includes a sound receiving portion disposed in a second direction different from the first direction, for receiving the sound. And the sound guide unit is located between the microphone hole and the sound receiving portion of the microphone, the sound guide unit guiding the sound, which has passed through the microphone hole, along the first direction and the second direction, toward the sound receiving portion of the microphone.

Abstract: A mobile communication device for receiving and transmitting wireless communication signals including a body having a border portion, a display supported by the body, a touch screen adjacent the display and defining an exterior surface of the mobile communication device such that the display is visible through the touch screen, the touch screen transferring an input signal through electrodes disposed at an edge portion of the touch screen, and an electrode covering layer located above the electrodes of the touch screen. The border portion of the body and the outermost portion of the touch screen are substantially coplanar.

Abstract: An HDD parking ramp is disclosed and includes a guide portion having an inclined surface adapted to receive a lift tab associated with an actuator mounting a read/write head during an unloading/parking operation, and a parking surface adapted to accommodate the lift tab at the completion of the unloading/parking operation, an installation support portion fixed in the HDD and adapted to support the guide portion, and a vertically adjustable driving device provided between the guide portion and the installation support portion and adapted to position the guide portion at a first vertical height relative to the installation support and a second vertical height greater than the first vertical height.