63results about How to "Increase linear density" patented technology

The present invention provides a tunneling magneto-resistive read sensor structure that improves sensitivity and linear density of the sensor structure. The sensor includes first and second electrodes and a stack positioned between the electrodes. The stack includes first and second free layers with magnetization orientations that are biased relative to each other. A tunneling barrier (insulating layer) or non-magnetic metal spacer is positioned between the first and second free layers. A sense current is passed between the first and second free layers of the stack. The amount of current passing through the first and second free layer changes based upon the orientation of the first and second free layers relative to each other.

A method of calibrating an interferometer for determining an optical property of the interferometer uses a calibrating optical arrangement. The calibrating optical arrangement comprises at least one diffractive pattern and a mirror having a reflecting surface. The diffractive pattern and the reflecting surface are disposed at a distance from each other in a beam path of measuring light emitted from an interferometer optics of the interferometer system to be calibrated.

The present invention is directed to a coupler that includes a coupler structure including at least one first transmission line disposed on a first major surface of a coupler dielectric substrate and at least one second transmission line disposed on a second major surface of the coupler dielectric substrate. The coupler structure includes four symmetric ports such that each port of the four symmetric ports is characterized by substantially identical impedance characteristics. A first ground plane structure is coupled to the coupler structure and including a first outer dielectric material and a first conductive exterior layer disposed substantially parallel to the first major surface. A second ground plane structure is coupled to the coupler structure and including a second outer dielectric material and a second conductive exterior layer disposed substantially parallel to the second major surface. A thermal path is disposed between the coupler structure and at least one of the first conductive exterior layer or second conductive exterior layer. The thermal path is characterized by a thermal resistance substantially within a range between 15 W / mK and 50 W / mK, such that the coupler has a power handling capability of more than 800 W per square inch of heat sink interface.

Disclosed is a package substrate for electrolytic leadless plating, characterized in that a wire bonding pad onto which a semiconductor chip is mounted is subjected to electrolytic leadless Au plating, and a solder ball pad is subjected to OSP metal finishing or electroless Au plating without use of plating lead lines, upon preparation thereof. A method of manufacturing the package substrate is also disclosed. The method includes Cu plating a whole surface of a base substrate having through-holes, developing a first dry film laminated onto the through-holes, removing a copper foil not covered with the first dry film, stripping the first dry film, exposing and developing a second dry film on the substrate so that only an upper portion to be subjected to electrolytic Au plating is exposed, grounding an electrolytic Au plating terminal to a solder ball pad, Ni—Au plating the wire bonding pad, removing the second dry film by a stripping solution, exposing and developing a third dry film, removing the exposed copper foil by an etching solution, removing the third dry film by a stripping solution, performing a series of processes of coating, exposing, developing and drying a solder resist, and subjecting the solder ball pad to OSP metal finishing.

An information recording method using an optical recording medium includes the steps of forming a plurality of recording pulses to irradiate the optical recording medium and recording information to the optical recording medium by irradiating the recording pulses on the optical recording medium. At least a leading edge of a first recording pulse and a trailing edge of a last recording pulse of the recording pulses shift at a shifting value, wherein the shifting value is determined by combinations of a length of M(n) of a mark being currently written and at least one of a length s(n−1) of a space precedent to the mark and a length s(n+1) of a space subsequent to the mark.

With two consecutive product-coded ECC blocks, EB1 and EB2, as a set, the rth row of first ECB block EB1 is followed by the rth row of second ECC block EB2 in such a way that the first row of first ECC block EB1 is followed by the first row of second ECB block EB2, which is followed by the second row of first ECC block ECB1, which is followed by the second row of second ECC block EB2, and so on, to interleave data on a row basis. That is, data of two ECC blocks, EB1 and EB2, is allocated alternately on a row basis. This allocation method allows an error to be distributed after reproduction even when a serious burst error extending 18 rows occurs in an ECC block.

A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser excited surface plasmons in a plasmon generator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The optical radiation is transmitted to the plasmon generator by means of a waveguide, whose optical axis (centerline) is tilted relative to either or both the backside surface normal and ABS surface normal in order to eliminate back reflections of the optical radiation that can adversely affect the properties and performance of the laser. Variations of the disclosure include tilting the plasmon generator, the waveguide and the laser diode.

Several embodiments of a sense current perpendicular to the planes of the sensor (CPP) and flux guide type of read head has a gap between first and second shield layers at an air bearing surface (ABS) where the flux guide is located which is less than a gap between the first and second shield layers at a recessed location where the sensor is located. This reduced gap increases the linear bit density capability of the read head. A longitudinal bias stack (LBS) is located in the sensor stack. Several unique methods of construction are described for forming the magnetic head assemblies.

An electro-optical device includes a substrate having a display region; and an extending region extending from the display region. The extending region is provided with wiring lines, and at least some wiring lines, which are disposed to be adjacent to each other, are correspondingly disposed in a plurality of different layers.

An optical disk recording apparatus operates on an optical disk having circular tracks which are provisionally written with an index signal used for securing a constant linear velocity of the optical disk from an innermost circular track to an outermost circular track, and records data along the circular tracks at different linear densities on different annular zones of the optical disk. In the apparatus, a disk drive section rotates the optical disk while synchronizing the index signal successively read from the rotated optical disk with a predetermined reference clock signal to thereby maintain the constant linear velocity of the circular tracks. A clock generating section multiplies or divides the reference clock signal by different rates to generate different writing clock signals in correspondence to the different annular zones of the optical disk. A data recording section operates in synchronization to the different writing clock signals for recording data along the circular tracks at the different linear densities on the different annular zones.

Through laser scanning process and by means of the surface diffusion wave interference of single laser beam on the surface of some material, straight line channel strength is formed on the surface ofthe material and holographic grating in different interval and different depth may be made. After the selected grating material is cleaned and cut, it is placed on computer controlled moving platformand through stepped laser scanning and regulating the technological parameters, including pulse width, frequency, incident angle, power density, etc., regular channel structure is formed on the surface of the material. The present invention has simple process, easy control, wide material selecting range and controlled cost.

Several embodiments of a sense current perpendicular to the planes of the sensor (CPP) and flux guide type of read head has a gap between first and second shield layers at an air bearing surface (ABS) where the flux guide is located which is less than a gap between the first and second shield layers at a recessed location where the sensor is located. This reduced gap increases the linear bit density capability of the read head. A longitudinal bias stack (LBS) is located in the sensor stack. Several unique methods of construction are described for forming the magnetic head assemblies.

The invention relates to the technical field of steel strand production, in particular to a production technology for a HDPE hot-galvanizing-zinc-aluminum-alloy pre-stress steel strand. The productiontechnology includes the following steps of steel-wire-rod preparing and detecting; acid pickling parkerizing; wiredrawing; hot galvanizing; finishing; twisting and stabilizing treating; anti-corrosive grease coating; plastic covering; packaging warehousing. According to the production technology for the HDPE hot-galvanizing-zinc-aluminum-alloy pre-stress steel strand, the corrosion resistance andthe flexible performance of the pre-stress steel strand can be improved, particularly, when the pre-stress steel strand is used on a bridge, the bridge building cost can be saved, the service life isprolonged, and construction is convenient.

A package substrate manufactured by electrolytically plating Au in a semi-additive manner without using any plating lead line on wire bonding pads and solder ball pads, and a method for manufacturing the package substrate. The method includes the steps of forming a first copper plated layer on a base substrate having through holes and inner surfaces of the through holes, coating a first resist over the first copper plated layer, partially removing the first resist, thereby exposing portions of the first copper plated layer respectively corresponding to regions where circuit patterns are to be plated, forming a second copper plated layer on the exposed portions of the first copper plated layer, stripping the first resist, coating a second resist over the resultant structure, and removing the second resist from regions where wire bonding pads and solder ball pads are to be formed, removing exposed portions of the first copper plated layer, forming the wire bonding pads and the solder ball pads, removing the second resist, removing exposed portions of the first copper plated layer, and coating a solder resist over all surfaces of the resultant structure, and removing portions of the solder resist respectively covering the wire bonding pads and the solder ball pads.

A data recording method according to one aspect of this invention comprises specifying a plurality of regions with different radial positions on a disk, and detecting the tilt amounts of the respective regions with respect to the optical axis of a light beam on the basis of a focus control signal used to just-focus the light beam on a recording surface of the disk, calculating tilt correction amounts for the respective regions in accordance with the tilt amounts of the respective regions, correcting a tilt of the optical axis with respect to a predetermined region on the basis of the tilt correction amount corresponding to the predetermined region, and recording data on the predetermined region while the tilt of the optical axis with respect to the predetermined region is corrected.

A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser excited surface plasmons in a plasmon generator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The optical radiation is transmitted to the plasmon generator by means of a waveguide, whose optical axis (centerline) is tilted relative to either or both the backside surface normal and ABS surface normal in order to eliminate back reflections of the optical radiation that can adversely affect the properties and performance of the laser. Variations of the disclosure include tilting the plasmon generator, the waveguide and the laser diode.

An electro-optical device includes a substrate having a display region; and an extending region extending from the display region. The extending region is provided with wiring lines, and at least some wiring lines, which are disposed to be adjacent to each other, are correspondingly disposed in a plurality of different layers.

A package substrate of, for example, a BGA type or a CSP type, manufactured by carrying out an electrolytic Au plating process without using any plating lead line for formation of bond fingers and solder ball pads, and a method for manufacturing the package substrate. The method includes the steps of laminating first dry films over upper and lower surfaces of a base substrate having via holes while being formed at its upper and lower surfaces with copper foils, and patterning the first dry films to expose predetermined surface portions of the base substrate, removing portions of the copper foils not covered by the first dry films to form circuits, stripping the first dry films, and forming a plated layer over the base substrate, laminating second dry films over the plated surfaces of the base substrate, and patterning the second dry films to expose portions of the plated surfaces of the base substrate corresponding to regions where Au is to be plated, removing the plated layer from the exposed surface portions of the base substrate corresponding to the Au plating regions, plating Au on the exposed surface portions of the base substrate, stripping the second dry films, and removing the remaining plated layer to expose the circuits, and coating a solder resist on the exposed circuits while exposing predetermined portions of the circuits.

An optical disk recording apparatus operates on an optical disk having circular tracks which are provisionally written with an index signal used for securing a constant linear velocity of the optical disk from an innermost circular track to an outermost circular track, and records data along the circular tracks at different linear densities on different annular zones of the optical disk. In the apparatus, a disk drive section rotates the optical disk while synchronizing the index signal successively read from the rotated optical disk with a predetermined reference clock signal to thereby maintain the constant linear velocity of the circular tracks. A clock generating section multiples or divides the reference clock signal by different rates to generate different writing clock signals in correspondence to the different annular zones of the optical disk. A data recording section operates in synchronization to the different writing clock signals for recording data along the circular tracks at the different linear densities on the different annular zones.

A droplet-discharging apparatus for discharging a droplet onto a base through the nozzle of a head, the apparatus including: a platform retaining the base; a plurality of transportation units, each including a head group having at least one head with a nozzle line and each being moved in the sub-scanning direction on an axis or on a plurality of axes disposed parallel to each other; and a position-controlling unit for adjusting relative position of the adjacent head groups arranged in the main scanning direction or in the sub-scanning direction to adjust the nozzle pitch by independently driving the plurality of transportation units, wherein the droplet is discharged onto predetermined portions on the base from the head group while the transportation units are relatively moved for the platform in the main scanning direction.

A vertical slot scanner generates a full coverage scan pattern for reading symbols presented or moved past a vertical window. Scan lines are generated in upper and lower central regions of the window to improve scanner productivity.

With two consecutive product-coded ECC blocks, EB1 and EB2, as a set, the rth row of first ECB block EB1 is followed by the rth row of second ECC block EB2 in such a way that the first row of first ECC block EB1 is followed by the first row of second ECB block EB2, which is followed by the second row of first ECC block ECB1, which is followed by the second row of second ECC block EB2, and so on, to interleave data on a row basis. That is, data of two ECC blocks, EB1 and EB2, is allocated alternately on a row basis. This allocation method allows an error to be distributed after reproduction even when a serious burst error extending 18 rows occurs in an ECC block.

The invention provides a single-spindle controllable condensed spinning device and a condensing method. A hollow structure large roller is adopted as a front roller, a circular closed hollow air suction insert is arranged between the hollow structure of the roller and a roller shaft, the air suction insert is embedded in an inner wall slide of the hollow structure of the roller by a roller drivenby a motor, an air suction groove is formed in the circular surface, adjacent to the inner wall of the hollow structure of the roller, of the air suction insert, the left side surface or the right side surface of the air suction insert is connected with a branch pipe through a closed bearing in a communication manner, and the branch pipes of two adjacent spindles are connected with a middle pipe in a communication manner. During use, the motor drives the air suction insert to rotate around the inner wall of the hollow structure of the roller, so that relative rotation between the air suction groove and the roller is realized, the time when the air suction groove is located right below the inner wall of the hollow structure of the roller and the relative position are controllable, controllable condensing of single spindle is realized, and random controllability of style characteristics of yarn surfaces under different condensing actions is realized.

A silver halide emulsion is disclose, containing silver halide grains, in which at least 50% by number of the silver halide grains is accounted for by (1) cubic grains (2) having a chloride content of not less than 90 mol %, (3) an iodide content of from 0 to 2 mol % and (4) a bromide content of from 0.1 to 10 mol %, and (5) containing dislocation lines in the peripheral region and (6) having rounded corners.

The invention provides a production method of a colored polyester yarn. The production method adopting three raw yarns including white polyester pre-oriented yarns, cation fuel dyeable polyester and black polyester pre-oriented yarns as materials comprises the following steps of: enabling the materials to pass through a yarn guide, a first roller, a first hot box, a twister, a second roller, a mesh spray nozzle, a third roller and an oil applying roller in sequence; and stretching, rolling and forming the materials, wherein the weight ratio of the white polyester pre-oriented yarns to the cation fuel dyeable polyester to the black polyester pre-oriented yarns is 2:2:3. The production method of the colored polyester yarn provided by the invention has the following technical effects that the produced colored polyester yarn is good in performance, stable in quality, provided with three mixed colors, high in product linear density and strength and good in rolling performance and stability, so that the fabric is rich in elasticity and good in hand feeling.

There is provided a recording adjustment device, a recording adjustment method, and a program of which enables recording compensation for an optical disc for a high-linear density to be realized. The recording adjustment device according to an embodiment of the present technique executes filter processing on the basis of a regenerative signal obtained by reproducing data recorded in a recording medium, and a recording pattern of marks and spaces of the data, identifies an impulse response of a system, calculates a difference in amplitude between an output from the filter processing after the identification of the impulse response and the regenerative signal every edge type, and detects a slope of a step response in the vicinity of an edge position.