Abstract: An antenna device according to an embodiment of the present invention includes a dielectric layer, a radiator and a dummy electrode. The radiator is disposed on the upper surface of the dielectric layer. The radiator includes a first mesh structure, and the first mesh structure includes a first antenna electrode line and a second antenna electrode line which cross each other. The dummy electrode is spaced apart from the radiator by the separation region on the upper surface of the dielectric layer. The dummy electrode includes a second mesh structure, and the second mesh structure includes a first dummy electrode line and a second dummy electrode line which cross each other. A spacing distance between the first dummy electrode line and the radiator is different from a spacing distance between the second dummy electrode line and the radiator at the separation region.

Abstract: Provided are a method and apparatus for quantifying a coarseness level of an organ of a living body from an ultrasonic image. The method includes: obtaining an ultrasonic image of area of an organ of a living body; determining a target area in the ultrasonic image of area; obtaining a quantified representative coarseness level of the target area from a brightness level distribution of pixels in the target area; and calculating a coarseness level of the organ of a living body, corresponding to the quantified representative coarseness level.

Abstract: A connector apparatus of a hard disk drive allows a connector to automatically contact a flexible printed circuit board upon combining a printed circuit board with a head/disk assembly. The connector apparatus includes a printed circuit board with the connector mounted thereon, and a head/disk assembly with the flexible printed circuit board mounted thereon. The connector includes a plurality of hooklike terminals for automatically connecting with the flexible printed circuit board when combining the printed circuit board with the head/disk assembly.

Abstract: A connector apparatus of a hard disk drive allows a connector automatically contact a flexible printed circuit board upon combining a printed circuit board with a the head/disk assembly. The connector apparatus includes a printed circuit board with the connector mounted thereon, and a head/disk assembly with the flexible printed circuit board mounted thereon. The connector includes a plurality of hooklike terminals for automatically connecting with the flexible printed circuit board when combining the printed circuit board with the head/disk assembly.

Abstract: In a data storage medium, which includes a servo information area where information on the position of a head is recorded and a data information area where actual data information is recorded, the servo information area is divided into an A/B burst section and a C/D burst section, and the A/B burst section has a servo pattern in which phases of burst signals A and B are recorded to be different from each other and the C/D burst section has a servo pattern in which phases of burst signals C and D are recorded to be different from each other. Thus, when the length of a bit recorded on a data storage medium is reduced considerably, an output signal of a head and a burst signal can be detected without distortion and accordingly an accurate control of head tracking is possible.

Abstract: A servo sampling timing generating circuit of a disk drive recording apparatus having a plurality of heads, wherein servo information for measuring interhead track position offset generated in head switching is recorded on a predetermined cylinder on disks in an embedded sector servo mode is characterized in that a final head selection signal and a servo sampling enable signal for sampling the servo information recorded on respective tracks constituting the predetermined cylinder are generated whenever a servo address mark is detected.

Abstract: A servowriting method for a hard disk drive is performed by detecting a servo-pattern on a first surface of a disk with a trailing coil of a first head slider positioned over the first surface of the disk. The detected servo-pattern is written onto the first surface of the disk with a first leading coil of the first head slider spaced-apart from the trailing coil, while the servo-pattern is simultaneously written onto a second surface of the disk opposite to the first surface with a second leading coil of a second head slider positioned over the second surface.

Abstract: A servo sampling timing generating circuit of a disk drive recording apparatus having a plurality of heads, wherein servo information for measuring interhead track position offset generated in head switching is recorded on a predetermined cylinder on disks in an embedded sector servo mode is characterized in that a final head selection signal and a servo sampling enable signal for sampling the servo information recorded on respective tracks constituting the predetermined cylinder are generated whenever a servo address mark is detected.

Abstract: An apparatus and method for measuring a characteristic pulse width of a data channel for a data handling device, with particular application to an HDD having an automatic gain control amplifier for amplifying a signal reproduced by a magnetic head, a filter/equalizer circuit for removing a noise component from an output signal from the automatic gain control amplifier and wave-shaping the resultant signal, a rectifier for rectifying an output signal from the filter/equalizer circuit, a first low pass filter for low pass filtering an output signal from the rectifier to detect an average value thereof, and a charge pump and a capacitor for cooperating to control an amplification gain of the automatic gain control amplifier in response to an output signal from the first low pass filter.

Abstract: A technique for controlling the write currents of a magnetic disk recording apparatus includes prolonging the write mode for a given time after completing data writing on a disk by supplying a constant write current to a head according to data to write, gradually reducing the write current for the given time, and cutting off the write current.

Abstract: A hard disk drive, which includes a main body with a cover for protecting its internal parts, includes at least one dew forming plate with a thermal conductivity greater than that of the cover, the at least one dew forming plate being mounted in a respective opening of the cover so as to collect the dew that would be formed on the internal parts due to the external environment.

Abstract: A data storage device includes a printed circuit board that serves as a base of the data storage device. A data storage medium is rotatably mounted upon a first shaft that extends from the printed circuit board. A first magnet is installed upon a first surface of the data storage medium for generating a first magnetic field. A first electrically conductive coil is formed within the printed circuit board for generating a second magnetic field in response to an application of electrical current. The first and second magnetic fields interact to produce rotation of the data storage medium about the first shaft. An actuator is rotatably mounted upon a second shaft that extends from the printed circuit board. A magnetic head is installed on a first end of the actuator for reading data from and writing data to the data storage medium. A second magnet is installed on a second end of the actuator positioned opposite to the first end for generating a third magnetic field.