Patent application number | Description | Published |
20080278852 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording head and a method of manufacturing said perpendicular magnetic recording head are provided. The perpendicular magnetic recording head has a main pole, a coil, which applies a magnetic field to the main pole, and a return pole constituting a magnetic circuit together with the main pole. The main pole has a back pole around which the coil is wound and a front pole contacting the back pole. The back pole and the front pole are formed on the same plane. | 11-13-2008 |
20080316646 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - A perpendicular magnetic recording head and a method of manufacturing the same are provided. The perpendicular magnetic recording head that includes a main pole, a return yoke, and coils that surround upper and lower parts of the main pole in a solenoid shape so that the main pole generates a magnetic field for recording information onto a recording medium, wherein a portion of the coils that pass above the main pole comprises a plurality of first coils and at least one second coil having a cross-sectional shape different from that of the first coils, and the second coil is formed across upper regions of two first coils adjacent to each other among the first coils. | 12-25-2008 |
20090103214 | MAGNETIC RECORDING HEAD COMPRISING CONICAL MAIN POLE TIP AND METHOD OF MANUFACTURING THE SAME - Provided is a vertical magnetic recording head having a main pole, a return yoke, and a coil, all of which are formed on a substrate, and a method of manufacturing the same. The main pole includes a vertical portion which is vertical to the substrate, a horizontal portion that connects a lower part of the vertical portion to the return yoke, and a main pole tip formed on the vertical portion of the main pole. The main pole tip has a conical shape vertical to the substrate. | 04-23-2009 |
20090116144 | PERPENDICULAR MAGNETIC RECORDING HEAD AND METHOD OF MANUFACTURING THE SAME - Provided are a perpendicular magnetic recording head and a method of manufacturing the same. The perpendicular magnetic recording head includes a main pole including a pole tip applying a recording magnetic field to a recording medium, a coil surrounding the main pole in a solenoid shape such that recording magnetic field for recording information to a recording medium is generated at the pole tip, and a return yoke forming a magnetic path for the recording magnetic field together with the main pole and surrounding a portion of the coil passing above the main pole. The number of times that the coil passes above the main pole is smaller than the number of times that the coil passes below the main pole. | 05-07-2009 |
20090122449 | MAGNETIC WRITE HEAD AND METHOD OF MANUFACTURING THE SAME - A magnetic write head includes a main pole, a return yoke forming a magnetic path with the main pole, a side shield formed at both sides of the main pole, and a shield gap layer formed between the side shield and the return yoke. The side shield and the return yoke have portions connected to each, and are separated from each other by the shield gap layer in an area except for the portions which contact. A first gap layer formed of a nonmagnetic insulation material is formed between both sides of the main pole and the side shield. A gap is formed between an end portion of the main pole and an end portion of the return yoke and a second gap layer is formed in the gap with a nonmagnetic insulation material. | 05-14-2009 |
20090296280 | MASTER RECORDING MEDIUM HAVING IMPROVED MAGNETIC TRANSFER PERFORMANCE - Provided is a master recording medium suitable for use in magnetic transfer of a servo pattern onto a magnetic recording medium. The master recording medium includes a substrate including a plurality of servo regions and a plurality of data regions, and a magnetic layer formed on each of the servo regions and patterned in the shape of a servo pattern to be patterned on a magnetic recording medium, wherein the servo regions protrude relative to the data regions. | 12-03-2009 |
20090297889 | MASTER RECORDING MEDIUM FOR MAGNETICALLY TRANSFERRING SERVO PATTERN TO THE MAGNETIC RECORDING MEDIUM AND METHOD OF MANUFACTURING THE SAME - Provided are a master recording medium and a method of manufacturing the master recording medium. The master recording medium includes: a plate; and a magnetic layer which is formed on the plate for magnetically transferring of a servo pattern that is to be formed on a magnetic recording medium. The method of manufacturing a master recording medium includes: engraving a polymer layer by nano imprinting to form an engraved pattern corresponding to a servo pattern to be formed on a magnetic recording medium; forming a magnetic layer which fills in the engraved pattern of the polymer layer; forming a back plate layer on the magnetic layer; and performing processing to expose the servo pattern on a surface of the magnetic layer that is opposite a surface of the magnetic layer on which the back plate layer is formed. | 12-03-2009 |
20100002565 | SERVO MASTER MAGNETICALLY TRANSFERRING SERVO PATTERNS TO MAGNETIC RECORDING MEDIUM, AND MAGNETIC TRANSFER METHOD USING THE SERVO MASTER - The servo master includes a membrane having a first surface and a second surface; a plurality of stamp areas which are disposed on the first surface, each of the plurality of stamp areas including a magnetic layer patterned with servo patterns to be magnetically transferred to a magnetic recording medium; and a pressing members which are disposed on the second surface, each of the plurality of pressing members being operable to apply pressure to a corresponding stamp area of the plurality of stamp areas. | 01-07-2010 |
20100117054 | NON-VOLATILE MEMORY DEVICE WITH DATA STORAGE LAYER - Provided is a non-volatile memory device including at least one horizontal electrode, at least one vertical electrode, at least one data storage layer and at least one reaction prevention layer. The least one vertical electrode crosses the at least one horizontal electrode. The at least one data storage layer is located in regions in which the at least one vertical electrode crosses the at least one horizontal electrode, and stores data by varying its electrical resistance. The at least one reaction prevention layer is located in the regions in which the at least one vertical electrode crosses the at least one horizontal electrode. | 05-13-2010 |
20100273027 | Magnetic printing stamp, method of manufacturing magnetic printing stamp and magnetic printing method - A magnetic printing stamp and a magnetic printing method using the same. The magnetic printing stamp may includes a plurality of servo regions having a magnetic body pattern and a plurality of data regions having no magnetic body pattern that are alternately formed, wherein a thickness of a portion of a substrate corresponding to each of the servo regions is less than a thickness of a portion of the substrate corresponding to each of the data regions. When a servo pattern is to be magnetically printed, the magnetic printing stamp and a magnetic recording medium uniformly and completely come in contact with each other. Thus, the magnetic printing stamp and the magnetic recording medium are prevented from being contaminated or damaged. In addition, excellent magnetic printing properties corresponding to an uneven pattern may be achieved. | 10-28-2010 |
20110068409 | RESISTIVE MEMORY DEVICES INCLUDING VERTICAL TRANSISTOR ARRAYS AND RELATED FABRICATION METHODS - A resistive memory device includes a vertical transistor and a variable resistance layer. The vertical transistor includes a gate electrode on a surface of a substrate, a gate insulation layer extending along a sidewall of the gate electrode, and a single crystalline silicon layer on the surface of the substrate adjacent to the gate insulation layer. At least a portion of the single crystalline silicon layer defines a channel region that extends in a direction substantially perpendicular to the surface of the substrate. The variable resistance layer is provided on the single crystalline silicon layer. The variable resistance layer is electrically insulated from the gate electrode. Related devices and fabrication methods are also discussed. | 03-24-2011 |
20110069464 | Memory module, memory system having the memory module, and method for manufacturing the memory module - Provided is a memory module, a system using the memory module, and a method of fabricating the memory module. The memory module may include a printed circuit board and a memory package on the printed circuit board. The printed circuit board may include an embedded optical waveguide and a first optical window extending from the optical waveguide to a first surface of the printed circuit board. The memory package may also include a memory die having an optical input/output section and a second optical window. The optical input/output section, the second optical window, and the first optical window may be arranged in a line and the first optical window and the second optical window may be configured to at least one of transmit an optical signal from the optical waveguide to the optical input/output section and transmit an optical signal from the optical input/output section to the optical waveguide. | 03-24-2011 |
20110133063 | Optical waveguide and coupler apparatus and method of manufacturing the same - Optical waveguide and coupler devices and methods include a trench formed in a bulk semiconductor substrate, for example, a bulk silicon substrate. A bottom cladding layer is formed in the trench, and a core region is formed on the bottom cladding layer. A reflective element, such as a distributed Bragg reflector can be formed under the coupler device and/or the waveguide device. Because the optical devices are integrated in a bulk substrate, they can be readily integrated with other devices on a chip or die in accordance with silicon photonics technology. Specifically, for example, the optical devices can be integrated in a DRAM memory circuit chip die. | 06-09-2011 |
20110134679 | MEMORY MODULE HAVING OPTICAL BEAM PATH, APPARATUS INCLUDING THE MODULE, AND METHOD OF FABRICATING THE MODULE - A memory module may include at least one memory package including an optical signal input/output (I/O) unit and a first optical beam path and a printed circuit board (PCB) on which the memory package is mounted. The PCB may have a second optical beam path configured to transmit an optical signal to the optical signal I/O unit. The memory module may further include a connecting body configured to mount the memory package on the PCB and match a refractive index of the first optical beam path with a refractive index of the second optical beam path. | 06-09-2011 |
20110194803 | OPTICAL MODULATOR FORMED ON BULK-SILICON SUBSTRATE - An optical modulator comprises a bulk-silicon substrate comprising a trench having a predetermined width and a predetermined depth. A bottom cladding layer is formed in the trench, and a plurality of waveguides and a phase modulation unit are formed on the bottom cladding layer. A top cladding layer is formed on the plurality of waveguides and the phase modulation unit. | 08-11-2011 |
20110206381 | OPTICAL SERIALIZING/DESERIALIZING APPARATUS AND METHOD AND METHOD OF MANUFACTURING SAME - An optical serializer/deserializer (SERDES) includes serializing circuitry which includes a source of a plurality of unmodulated optical signals, a modulation unit for generating a plurality of modulated optical signals using a plurality of electrical signals to modulate the plurality of unmodulated optical signals, and a coupling unit for delaying the plurality of modulated optical signs to generate a plurality of delayed modulated optical signals and combines the delayed modulated optical signals to generate a serialized modulated optical signal. Deserializing circuitry of the SERDES includes an optical splitter for splitting a serialized modulated optical signal into a plurality of modulated split optical signals, a demodulation unit for demodulating the modulated split optical signals and generating a respective plurality of demodulated split optical signals, and a delay unit for delaying each of the plurality of demodulated split optical signals by a respective delay amount such that the serialized modulated optical signal is converted into a respective plurality of parallel demodulated split optical signals. | 08-25-2011 |
20110243492 | SILICON BASED OPTICAL MODULATORS AND METHODS OF FABRICATING THE SAME - A silicon based optical modulator apparatus can include a lateral slab on an optical waveguide, the lateral slab protruding beyond side walls of the optical waveguide so that a portion of the optical waveguide protrudes from the lateral slab towards a substrate. | 10-06-2011 |
20120025265 | PHOTODETECTOR STRUCTURE AND METHOD OF MANUFACTURING THE SAME - A method of manufacturing a photodetector structure is provided. The method includes forming a structural layer by making a trench in a bulk silicon substrate and filling the trench with a cladding material, forming a single-crystallized silicon layer on the structural layer, and forming a germanium layer on the single-crystallized silicon layer. | 02-02-2012 |
20130015546 | MULTI-LAYER PHOTOELECTRIC INTEGRATED CIRCUIT DEVICE WITH OVERLAPPING DEVICESAANM Joe; In-sungAACI SeoulAACO KRAAGP Joe; In-sung Seoul KRAANM Suh; Sung-dongAACI SeoulAACO KRAAGP Suh; Sung-dong Seoul KRAANM Na; Kyoung-wonAACI SeoulAACO KRAAGP Na; Kyoung-won Seoul KRAANM Ha; Kyoung-hoAACI SeoulAACO KRAAGP Ha; Kyoung-ho Seoul KRAANM Kim; Seong-guAACI Pyeongtaek-siAACO KRAAGP Kim; Seong-gu Pyeongtaek-si KRAANM Shin; Young-hwackAACI Yeonsu-guAACO KRAAGP Shin; Young-hwack Yeonsu-gu KR - An integrated circuit device includes a plurality of device layers disposed on a substrate. A first one of the device layers includes at least one photo device and/or at least one electronic device and a second one of the device layers includes at least one photo device overlying the at least one photo device and/or the at least one electronic device of the first one of the device layers. | 01-17-2013 |
20130064496 | OPTICAL LINKS, MANUFACTURING METHODS THEREOF, AND MEMORY SYSTEMS HAVING THE SAME - An optical link may include a main optical waveguide; N sub-optical waveguides, where N is a natural number; N mode couplers, each configured to perform a mode coupling operation between the main optical waveguide and a respective one of the N sub-optical waveguide; and an optical wavelength filter connected to an output terminal of the main optical waveguide and an output terminal of each of the N sub-optical waveguides. A memory system may include a memory device, a memory controller, and the optical link. A data processing system may include the memory system and a central processing unit connected to the memory system through a bus. | 03-14-2013 |
20130075359 | Perpendicular Magnetic Recording Head and Method of Manufacturing the Same - Provided are a perpendicular magnetic recording head and a method of manufacturing the same. The perpendicular magnetic recording head includes a main pole including a pole tip applying a recording magnetic field to a recording medium, a coil surrounding the main pole in a solenoid shape such that recording magnetic field for recording information to a recording medium is generated at the pole tip, and a return yoke forming a magnetic path for the recording magnetic field together with the main pole and surrounding a portion of the coil passing above the main pole. The number of times that the coil passes above the main pole is smaller than the number of times that the coil passes below the main pole. | 03-28-2013 |
20130092980 | PHOTODETECTOR STRUCTURES INCLUDING CROSS-SECTIONAL WAVEGUIDE BOUNDARIES - A photodetector structure can include a silicon substrate and a silicon layer on the silicon substrate, that can include a first portion of an optical transmission medium that further includes a silicon cross-sectional transmission face. A germanium layer can be on the silicon substrate and can include a second portion of the optical transmission medium, adjacent to the first portion can include a germanium cross-sectional transmission face butt-coupled to the silicon cross-sectional transmission face. | 04-18-2013 |
20130119270 | WAVELENGTH DIVISION DEVICES, MULTI-WAVELENGTH LIGHT GENERATORS AND OPTICAL BIOSENSOR SYSTEMS USING THE SAME - A multi-wavelength light generator includes a broadband light source and a wavelength division device. The multi-wavelength light generator is configured to generate a first output light having a first line width. The wavelength division device is configured to divide a wavelength of the first output light to provide a plurality of second output lights. Each of the second output lights has a second line width narrower than the first line width, and each of the second output lights is used as a light source of each channel of an optical sensor. | 05-16-2013 |
20130224847 | OPTICAL HEADS AND SEQUENCING APPARATUSES INCLUDING THE SAME - A sequencing apparatus may include a bio-disk having reaction regions in which nucleic acids are polymerized; a stage configured to revolve around an axis, the stage including optical heads for detecting lights emitted from the plurality of reaction regions due to the polymerization of the nucleic acids; and/or a control unit configured to generate data regarding base sequences of the nucleic acids in the reaction regions based on wavelengths of the lights detected by the plurality of optical heads. An optical head may include a light emitting unit configured to emit light toward a reaction region in which nucleic acids are polymerized; a light receiving unit configured to receive the light emitted by the light emitting unit; a de-multiplexing unit configured to de-multiplex the light received by the light receiving unit; and/or a plurality of photoelectric converting units configured to convert the de-multiplexed light to electrical signals. | 08-29-2013 |
20130259747 | Optical Biosensor - An optical biosensor includes a sensing block that receives a first optical signal and outputs a second optical signal through at least one channel of a plurality of channels that correspond to a sensed concentration of a biomaterial; and a detecting block that detects the second optical signal, converts the second optical signal into an electrical signal, and outputs the electrical signal. | 10-03-2013 |
20130309135 | OPTICAL BIOSENSOR, BIO-SENSING SYSTEM INCLUDING THE SAME, AND METHOD OF FABRICATING THE OPTICAL BIOSENSOR - An optical biosensor including a bio-sensing unit configured to receive an optical signal and generating a sensed optical signal, the wavelength of which varies according to a result of sensing a biomaterial; and a spectrometer including a plurality of ring resonators for dividing the sensed optical signal according to a wavelength and generating a plurality of output optical signals, respectively. | 11-21-2013 |
20140134712 | OPTICAL BIOSENSOR AND MANUFACTURING METHOD THEREOF - An optical biosensor, and a method of manufacturing the same, includes a first layer, a second layer stacked on the first layer, a first grating coupler within the first layer and the second layer, and a second grating coupler within the first layer. The first grating coupler is configured to couple a light pattern provided to a front side of the optical biosensor. The second grating coupler is configured to output the light pattern coupled by the first grating coupler to a photoelectric conversion element on a rear side of the optical biosensor. | 05-15-2014 |
20140209929 | OPTICAL COUPLING SYSTEM AND OPTICAL SENSOR INCLUDING THE SAME - An optical coupling system is provided which includes a first layer structure and a second layer structure. The first layer structure includes a plurality of layers sequentially stacked on a substrate, and is configured to compresses a beam emitted from a light source along a direction substantially perpendicular to a top surface of the substrate. The second layer structure is formed on the substrate, and is configured to compresses the beam, having passed through the first layer structure, along a direction substantially parallel to the top surface of the substrate. | 07-31-2014 |
20140268165 | OPTICAL BIOSENSOR AND METHOD OF OPERATING THE SAME - An optical biosensor may include a biosensing unit, detection unit, and signal processing unit. The biosensing unit may be configured for receiving first and second optical signals (which are generated from a phase-modulated optical signal), outputting a sensing signal by transmitting the first optical signal via a first optical path that includes a sensing resonator, and outputting a reference signal by transmitting the second optical signal via a second optical path that includes a reference resonator. The detection unit may be configured for receiving the sensing signal and the reference signal, detecting a phase element of each of the sensing signal and the reference signal through a signal demodulation operation, and detecting a phase difference between the sensing signal and the reference signal according to the detected phase elements. The signal processing unit may be configured for calculating the concentration of a bio-material based on the detected phase difference. | 09-18-2014 |
20140376859 | MULTI-LAYER PHOTOELECTRIC INTEGRATED CIRCUIT DEVICE WITH OVERLAPPING DEVICES - An integrated circuit device includes a plurality of device layers disposed on a substrate. A first one of the device layers includes at least one photo device and/or at least one electronic device and a second one of the device layers includes at least one photo device overlying the at least one photo device and/or the at least one electronic device of the first one of the device layers. | 12-25-2014 |