Abstract:
A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a mark shape such that a recording/reproducing characteristic of the optical recording medium is improved.
Abstract:
An adaptive writing method of a high-density optical recording apparatus and a circuit thereof. The circuit includes a discriminator for discriminating a magnitude of a present mark of input NRZI data and magnitudes of leading and/or trailing spaces of the input NRZI data, a generator for controlling the waveform of a write pulse in accordance with the magnitude of the present mark of the input NRZI data and the magnitudes of the leading and/or trailing spaces of the input NRZI data to generate an adaptive write pulse, and a driver for driving a light source by converting the adaptive write pulse into a current signal in accordance with driving power levels for respective channels of the adaptive write pulse. The widths of the first and/or last pulses of the write pulse waveform are varied in accordance with the magnitude of the present mark of input NRZI data and the magnitude of the leading and/or trailing spaces, thereby minimizing jitter to enhance system reliability and performance.
Abstract:
A metal etching process is described. A substrate having a dielectric layer thereon is provided. An aluminum-copper alloy layer is formed on the dielectric layer. A hard mask layer is formed on the aluminum-copper alloy layer. A patterned photoresist layer is formed on the hard mask layer and then the hard mask layer is patterned. A thermal treatment process is performed. The thermal treatment process is carried out at a temperature of more than 300° C. for a period of at least 3 minutes. Thereafter, the aluminum-copper alloy layer is etched using the patterned hard mask layer as an etching mask. Due to the thermal treatment, the metal precipitate (CuAl2) within the aluminum-copper alloy layer is eliminated and hence the metal etching process is improved.
Abstract:
A method and apparatus to record data on an optical recording medium include generating a recording waveform having an erase pattern comprising a predetermined pulse having a high level which is higher than an erase power level and having a low level which is lower than the erase power level.
Abstract:
A semiconductor module, including a semiconductor device mounted on a printed circuit board (PCB), the PCB having an electrical connection to the semiconductor module, and a heat sink in direct contact with the semiconductor device, the heat sink being formed with a first end and a second end, the first end and the second end being formed with different heights, wherein the semiconductor module allows air flow to pass through the semiconductor module, radiating heat away from the heat sink. Another semiconductor module, including a semiconductor device mounted on a PCB, a heat sink in direct contact with the semiconductor device, the heat sink having a first portion and a second portion, wherein the first portion has a flat shape and is in direct contact with the semiconductor device and the second portion has a corrugated shape and is not in contact with the semiconductor device, wherein the semiconductor module allows air flow to pass through the semiconductor module, radiating heat away from the heat sink.
Abstract:
Disclosed are pairs of semiconductor flash memory cells including first and second source lines formed in a semiconductor substrate, semiconductor pillars extending from the substrate between the source lines, first and second charge storage structures formed on opposite side surfaces of the semiconductor pillar and separated by trench isolation structures. The x and y pitch separating adjacent semiconductor pillars in the memory cell array are selected whereby forming the trench isolation structures serves to separate both charge storage structures and conductive structures provided on opposite sides of a semiconductor pillars. Also disclosed are methods of fabricating such structures whereby the density of flash memory devices, particularly NOR flash memory devices, can be improved.
Abstract:
A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a mark shape such that a recording/reproducing characteristic of the optical recording medium is improved.
Abstract:
A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a mark shape such that a recording/reproducing characteristic of the optical recording medium is improved.
Abstract:
An optical pickup apparatus includes a first light source to emit a first light beam having a predetermined wavelength, a first optical path changer to change a proceeding path of the first light beam, an objective lens to focus the first light beam on a recording medium, a diffraction member to divide the first light beam reflected by the recording medium into five light regions, the diffraction member having a first diffraction region having a wide width in a direction corresponding to a tangential direction of the recording medium and second through fifth diffraction regions sequentially arranged around the outside of the first diffraction region in a direction corresponding to a radial direction of the recording medium, and a first photodetector having first through fifth light receiving portions to receive the first light beam reflected by the recording medium.
Abstract:
A data-management apparatus and method, the apparatus including: a display unit to display a user interface that includes management options for a plurality of load-balancing cluster-based devices connected through a network; an input unit to receive a selection value; and a control unit to manage the plurality of load-balancing cluster-based devices according to the inputted selection value.