Abstract: An organic light emitting device having a photonic crystal structure and a manufacturing method thereof are provided. The organic light emitting device comprises: a substrate through which light passes; a photonic crystal layer formed on the substrate and having a photonic crystal structure; an intermediate layer formed on the photonic crystal layer and having a large refractive index compared with the photonic crystal layer; a first electrode layer formed on the intermediate layer; a light emitting layer formed on the first electrode layer and emitting light according to current flow; and a second electrode layer formed on the light emitting layer.

Abstract: An organic light emitting device having a photonic crystal structure and a manufacturing method thereof are provided. The organic light emitting device comprises: a substrate through which light passes; a photonic crystal layer formed on the substrate and having a photonic crystal structure; an intermediate layer formed on the photonic crystal layer and having a large refractive index compared with the photonic crystal layer; a first electrode layer formed on the intermediate layer; a light emitting layer formed on the first electrode layer and emitting light according to current flow; and a second electrode layer formed on the light emitting layer.

Abstract: An organic light emitting device having a photonic crystal structure and a manufacturing method thereof are provided. The organic light emitting device comprises: a substrate through which light passes; a photonic crystal layer formed on the substrate and having a photonic crystal structure; an intermediate layer formed on the photonic crystal layer and having a large refractive index compared with the photonic crystal layer; a first electrode layer formed on the intermediate layer; a light emitting layer formed on the first electrode layer and emitting light according to current flow; and a second electrode layer formed on the light emitting layer.

Abstract: A micro actuator having separated stages and a data storage apparatus employing the same are provided. The micro actuator includes: a supporting unit; stages that are elastically supported by the supporting unit, each stage having a mounting surface where a target driven body is mounted thereon, and arranged adjacent to each other; levers which are disposed between the stages, each lever having two ends respectively connected to adjacent stages, and which apply force to the adjacent stages so that when one of the stages is moved, an adjacent stage is moved in an opposite direction to a moving direction of the moved stage; and driving units which respectively provide a driving force to the stages.

Abstract: Provided are a method of calculating repeatable runout (RRO) of a hard disk drive (HDD) in a frequency domain, a method of calculating a compensation value using the RRO calculating method, and recording media used therefore. The method of calculating RRO in a disk with a plurality of tracks includes: calculating first set of frequency coefficients for representing the RRO by analyzing a position error signal (PES), which is sampled in a target track, in a frequency domain while a head follows the target track; and calculating the RRO using the first set of frequency coefficients.

Abstract: An organic light emitting device having a photonic crystal structure and a manufacturing method thereof are provided. The organic light emitting device comprises: a substrate through which light passes; a photonic crystal layer formed on the substrate and having a photonic crystal structure; an intermediate layer formed on the photonic crystal layer and having a large refractive index compared with the photonic crystal layer; a first electrode layer formed on the intermediate layer; a light emitting layer formed on the first electrode layer and emitting light according to current flow; and a second electrode layer formed on the light emitting layer.

Abstract: A method of fabricating a micro actuator is provided including a media stage having a media loading surface and a coil for driving the media stage, formed on the opposite surface of the media stage to the media loading surface. The method includes forming a groove on a first surface of a first substrate, forming a coil on a first surface of a second substrate, bonding the first surface of the first substrate to the first surface of the second substrate, and forming the media loading surface on a second surface of the second substrate, which is opposite the first surface of the second substrate.

Abstract: An X-Y stage driver having a locking device and a data storage system having the X-Y stage driver. The X-Y stage driver includes an X-Y stage; a supporting unit that supports the X-Y stage and has elastic beams that support corners of the X-Y stage; a driving unit that drives the X-Y stage in a first direction and a second direction which is perpendicular to the first direction; a stiffener that prevents the X-Y stage from rotating; and a locking device that fixes the stiffener by an electrostatic force.

Abstract: An X-Y stage driver having a locking device and a data storage system having the X-Y stage driver. The X-Y stage driver includes an X-Y stage; a supporting unit that supports the X-Y stage and has elastic beams that support corners of the X-Y stage; a driving unit that drives the X-Y stage in a first direction and a second direction which is perpendicular to the first direction; a stiffener that prevents the X-Y stage from rotating; and a locking device that fixes the stiffener by an electrostatic force.

Abstract: A micro actuator having separated stages and a data storage apparatus employing the same are provided. The micro actuator includes: a supporting unit; stages that are elastically supported by the supporting unit, each stage having a mounting surface where a target driven body is mounted thereon, and arranged adjacent to each other; levers which are disposed between the stages, each lever having two ends respectively connected to adjacent stages, and which apply force to the adjacent stages so that when one of the stages is moved, an adjacent stage is moved in an opposite direction to a moving direction of the moved stage; and driving units which respectively provide a driving force to the stages.

Abstract: A method of fabricating a micro actuator is provided including a media stage having a media loading surface and a coil for driving the media stage, formed on the opposite surface of the media stage to the media loading surface. The method includes forming a groove on a first surface of a first substrate, forming a coil on a first surface of a second substrate, bonding the first surface of the first substrate to the first surface of the second substrate, and forming the media loading surface on a second surface of the second substrate, which is opposite the first surface of the second substrate.

Abstract: Provided are a method of calculating repeatable runout (RRO) of a hard disk drive (HDD) in a frequency domain, a method of calculating a compensation value using the RRO calculating method, and recording media used therefore. The method of calculating RRO in a disk with a plurality of tracks includes: calculating first set of frequency coefficients for representing the RRO by analyzing a position error signal (PES), which is sampled in a target track, in a frequency domain while a head follows the target track; and calculating the RRO using the first set of frequency coefficients.