Abstract: The present invention provides a photochromic film which is formed by curing a photochromic composition and includes a multifunctional (metha)acrylate-based monomer that has two or more functional groups, and a photochromic dye, a product including the same, and a method for producing the photochromic film.

Abstract: A head stack assembly (HAS) of a hard disk drive (HDD) includes a swing arm, a connection plate integral with a terminal end of the swing arm, a head slider including a magnetic head for reading/writing data from/onto a disk, and a suspension that is attached to the connection plate, supports the head slider, and has characteristics which minimize the degree to which the magnetic head will run off-track due to vibrations induced in the HDD. The suspension includes two connecting parts having upper surfaces at which the suspension is attached to the connection plate. In the HDD, the upper surface of the connecting part positioned closest to the center of the disk center lies in a plane beneath the plane in which the upper surface of the other connecting part lies.

Abstract: A head stack assembly (HSA) for a hard disk drive (HDD) comprises a swing arm rotatably coupled to a base member of the HDD, a connection plate coupled to an edge part of the swing arm, a head suspension component attached to the connection plate, and a head slider comprising a magnetic read/write head attached to an edge part of the head suspension component.

Abstract: The present invention relates to a photochromic composition comprising multifunctional (meth)acrylate-based monomers having two or more functional groups, a photochromic dye and an aromatic vinyl compound, in which the content of the aromatic vinyl compound is more than 30% by weight and 70% by weight or less, a photochromic film produced by using the same, and a method for producing the photochromic film.

Abstract: A method of doping impurity ions in a dual gate includes doping first conductivity type impurity ions in a gate conductive layer over a semiconductor substrate having a first region and a second region, wherein the doping is performed with a concentration gradient so that a doping concentration in an upper portion of the gate conductive layer is higher than that in a lower portion; doping second conductivity type impurity ions in a portion of the gate conductive layer in the second region using a mask for opening the portion of the gate conductive layer in the second region; and diffusing the first conductivity type impurity ions and the second conductivity type impurity ions by performing heat treatment.

Abstract: Provided are a head stack assembly (HSA) with reduced off-track, a hard disk drive including the HSA, and a method of reducing the off-track of the hard disk drive. The HSA includes a swing arm rotatably mounted on a base member of a hard disk drive (HDD); a connecting plate coupled to a front edge of the swing arm; a suspension coupled to the connecting plate to vibrate finely; a pair of hinges disposed on both sides of a center line of the suspension to connect the connecting plate to the suspension; a piezoelectric material layer including a piezoelectric material which is disposed on only one hinge of the pair of hinges, wherein the hinge is closer to a center of a disk in the HDD than the other is; and a head slider that is a recording or reproducing medium of data mounted on the front edge of the suspension.

Abstract: Provided are an HSA with reduced off-track and an HDD including the HSA. The HSA includes a swing arm rotatably mounted on a base member of an HDD; a connecting plate coupled to a front edge of the swing arm; a suspension coupled to the connecting plate to vibrate finely; a pair of hinges disposed on both sides of a center line of the suspension to connect the connecting plate to the suspension; and a head slider that is a recording or reproducing medium of data mounted on the front edge of the suspension. When a hinge between the pair of hinges, which is closer to a center of the disk of the HDD than the other is, is referred to as a first hinge and the other hinge is referred to as a second hinge, the first hinge has a thickness greater than a thickness of the second hinge.

Abstract: A high adhesive acrylate monomer has a specific chemistry figure. This monomer may be easily prepared in a simplified way, and various linkers may be used between L-DOPA and an acrylate group attached to a tail of L-DOPA, so molecular weight and size of the entire material may be easily controlled. Also, various kinds of acrylate to be combined to a isocyanate compound used as a linker may be selected, so various molecules may be easily composed.

Abstract: The present invention relates to a process for preparing polyethylene naphthalate, comprising the steps of: esterifying 2,6-naphthalene dicarboxylic acid and ethylene glycol, or glycols using the two materials as major material to obtain prepolymer which comprises bis(beta-hydroxyethyl)naphthalate or low polymer as main material; and performing polycondensation reaction to thereby prepare polyethylene naphthalate. The process of the present invention has advantages of: enabling esterification with a low molar ratio of ethylene glycol to reduce reaction time, thereby increasing process efficiency; minimizing formation of side reaction products to improve properties; and preventing deterioration of the products by performing polycondensation at a low temperature to thereby obtain polyethylene naphthalate polymers of high quality.

Abstract: The present invention relates to a method for casting an acryl film, which includes the steps of injecting a material of the acryl film into a space that is formed from a pair of substrates and a gasket positioned between a pair of substrates, and curing the material of the acryl film. The shrinkage ratio of the gasket is not less than 10% after the acryl film is subjected to the curing step, or the shrinkage ratio of the gasket after the acryl film is subjected to the curing step is the same as or larger than the shrinkage ratio of the material of the acryl film.

Abstract: The present invention provides a photochromic film which is formed by curing a photochromic composition and includes a multifunctional (metha)acrylate-based monomer that has two or more functional groups, and a photochromic dye, a product including the same, and a method for producing the photochromic film.

Abstract: A hard disk drive includes a base on which at least one disk recording and storing data is provided, a filter provided in an area around a corner of the base with a predetermined air flow space interposed between the corner and the filter to collect contaminant particles in air flowing due to rotation of the disk, and an air exhaust prevention unit provided in an area of the air flow space to prevent the air input to the air flow space through an inlet portion between the filter and a first corner side wall connected to the corner from being exhausted through an outlet portion between the filter and a second corner side wall connected to the corner without passing through the filter. The hard disk drive is manufactured in a simple method without changing the media of the filter and a contaminant particle collection effect is improved.

Abstract: The present invention relates to a multi-layered photochromic sheet and a photo chromic glass prepared therefrom. In particular, the present invention relates to a multi-layered photochromic sheet having excellent durability by reducing a decomposition rate of photochromic dye, in which two or more photochromic films consisting of an oxygen or moisture shielding barrier layer and photochromic layer are stacked, compared to a conventional mono layered film. Further, the present invention relates to a photochromic glass having excellent durability and appearance, in which the multi-layered photochromic sheet is disposed between two glasses, and to a glass for vehicles or buildings using the same.

Abstract: An actuator assembly usable un a hard disk drive includes an actuator arm having an arm hole to improve dynamic characteristics. The actuator arm of the actuator assembly has an arm hole having first, second, and third extended portions, and two members positioned at both sides of the arm hole. The first extended portion is formed at an edge positioned at a leading end of the arm hole so that each of leading ends of the two members has a first reduced width, the second extended portions are formed at edges positioned at a rear end of the arm hole so that each of rear ends of the two members has a second reduced width, and the third extended portions are formed at both sides of a middle portion of the arm hole so that each of middle portions of the two members has a third reduced width.

Abstract: An actuator apparatus used with a hard disk drive. The actuator apparatus includes a pivotable actuator arm, a magnetic head mounted onto a first end of the actuator arm, an overmold connected to a second end of the actuator arm and including a metal piece, a voice coil motor (VCM) having a coil coupled to the overmold and at least one magnet positioned to face the coil, and a stopper positioned to be spaced apart at a predetermined interval from the overmold of the actuator arm when the magnetic head is positioned at a parked position, to limit pivoting of the actuator arm. Specifically, the stopper may be positioned to be spaced at the interval from the overmold of the actuator arm positioned at a position where a torque acting on the actuator arm due to the metal piece and the magnet is substantially 0.

Abstract: The present invention relates to a display, more specifically, to an image display improving a hot spot and a viewing angle and solving problems caused by the chemical characteristic of materials, even if implementing a display by projection-type, and manufacturing method at the same. In order to this, the present invention provides an image display comprising of background materials and masterbatch achieving a performance of the display by mixing with the background materials; wherein the masterbatch comprises fluorescent pigments of red (R), green (G) and blue (B) implementing colors, a carbon black, a light diffuser and a UV stabilizer.

Abstract: Disclosed is a message conversion apparatus for integrated monitoring of industrial equipment capable of integrated management and monitoring using the internet or computer networks, by extracting data conforming to a predetermined Self Description from each message of different communication protocols and converting it into XML message format, when transmitting status and operational message from semiconductor equipment or industrial automation PLC equipment to a server.

Abstract: A disk clamp to fix a disk to a hub of a spindle motor in a hard disk drive, and a hard disk drive having the disk clamp. The disk clamp can include a coupling hole formed at a center of the disk clamp, in which a clamping screw is inserted, at least one through hole formed outside the coupling hole, and a pressing portion provided at an outer circumferential side of the disk clamp to contact and press the disk. A particular area around the at least one through hole that is away from the at least one through hole can have a sectional thickness thinner than a predetermined area that is adjacent to the at least one through hole, to prevent stress distribution generated at a contact surface between the pressing portion and the disk from being irregular due to the at least one through hole.

Abstract: Disclosed is a photochromic film for automobiles prepared by curing a photochromic composition comprising an acrylic resin, a crosslinking agent having an intramolecular UV stabilizing structure, and a photochromic dye, a preparation method of the photochromic film for automobiles, and an article comprising the photochromic film for automobiles.

Abstract: The present invention provides a method for estimating a remaining capacity of a battery. The method comprises: measuring a current value, a voltage value and temperature of the battery; correcting the current value based on the voltage value; calculating a current integration value by integrating the corrected current value and calculating a current integration capacity from the calculated current integration value by reflecting a charge/discharge efficiency; determining a battery forward voltage capacity from the measured current value, voltage value and temperature, and determining whether it is necessary to correct the current integration capacity based on the forward voltage capacity; converting the current integration capacity into a remaining capacity, if it is determined that it is not necessary to correct; and correcting, if it is determined that it is necessary to correct, the current integration capacity and converting the corrected current integration capacity into a remaining capacity.