Abstract:
A chemical vapor deposition (CVD) method for depositing a suicide and a CVD system for performing the same are disclosed. A silicide is deposited on a substrate. Residual gases remaining from the depositing step are purged out by flowing air including H2O (g), to substantially remove fumes caused by the residual gases. In the purge step, the cycle purge is carried out at the conditions similar to the flow of atmosphere, to substantially remove the fumes.
Abstract:
A light-emitting compound and a display device adopting the light-emitting compounds as a color-developing substance. When the display device adopts an organic layer formed of the light-emitting compound, such as a light-emitting layer or an electron transport layer, as a blue light-emitting material, it can display blue and has good luminous efficiency and driving voltage characteristics.
Abstract:
A flat type color cathode ray tube (CRT) includes a bulb consisting of a flat type panel where a fluorescent film on which inner surface a fluorescent pattern and black matrix are coated is formed, and a funnel extended from the panel, and a frame assembly having a flat type shadow mask installed adjacent to the panel in the bulb and having a plurality of strips for forming a plurality of slits and a tie bar for connecting neighboring strips, wherein a vertical pitch of the black matrix formed on the fluorescent film is less than or equal to a vertical pitch of the tie bar of the flat type shadow mask.
Abstract:
Methods of forming integrated circuit memory devices may include steps to form memory cell access transistors therein. These steps may include steps to form a gate line on a semiconductor substrate and then implant dopants of first conductivity type into the semiconductor substrate to define a self-aligned impurity region therein. A spacer layer of a first material is then formed on a sidewall and upper surface of the gate line. An interlayer insulating layer of a second material is then formed on the spacer layer. A series of selective etching steps are then performed using different etchants. For example, a step is performed to selectively etch the interlayer insulating layer to define a contact hole therein, using the spacer layer as an etching mask to protect the gate line from etching damage. A selective etching step is then performed to convert the spacer layer into a sidewall spacer on the sidewall of the gate line. This etching step is performed using the interlayer insulating layer as an etching mask. A conductive plug (e.g., bit line plug) is then formed in the contact hole. This conductive plug forms an ohmic contact with the impurity region.
Abstract:
A single-electron memory device using the electron-hole Coulomb blockade is provided. A single-electron memory device in accordance with an embodiment of the present invention includes a plurality of quantum dot tunnel-junction arrays, a gate electrode, and source and drain electrodes. The plurality of quantum dot tunnel-junction arrays include at least two tunnel-junctions, are parallelly coupled to each other, and are well separated from each other to prevent single-electron tunneling between them. One of the plurality of quantum dot tunnel-junction arrays includes the gate electrode, and the voltage applied to the gate electrode can vary the number of electron-hole pairs. Each of the above-mentioned plurality of quantum dot tunnel-junction arrays includes separate source and drain electrodes where voltages are applied
Abstract:
An attenuated Japanese encephalitis virus adapted to Vero cell by passages on Vero cell is disclosed. A Japanese encephalitis vaccine comprising said attenuated virus is also disclosed.
Abstract:
A temperature-adaptive capacitor array used in a TCXO so that the TCXO effectively conducts temperature-compensating in the resonant frequency without the non-monotonicity while a smaller silicon area is used in producing the capacitor array. A number of capacitor arrays allocated in two capacitor banks. Each of the capacitor arrays comprises two or more unit cells, and in turn each unit cell consists of a unit capacitor and a switching element, respectively. All of unit capacitors included in the capacitor arrays are connected each other through a decoder assembly to provide a crystal oscillator with a load capacitance. The unit capacitors belonging to one of the capacitor arrays have the same capacitance with each other. Two unit capacitors belonging to different capacitor arrays, however, have different capacitances from each other. The capacitance of the unit capacitors belonging to each capacitor array is set in consideration of control preciseness required in compensating a frequency deviation in the resonant frequency of the crystal oscillator as the temperature varies in at least a portion of a practical temperature range, within which the crystal oscillator operates.
Abstract:
An apparatus for cleaning a transfer roller and an optical photoreceptor cleans the transfer roller for transferring a toner image formed on the optical photoreceptor of a printing device to a recording paper, and includes a cleaning roller installed to closely contact an outer circumferential surface of the transfer roller and to be rotatable; a heat source installed in the cleaning roller for heating an outer circumferential surface of the cleaning roller; and a cleaning roller moving mechanism which causes the cleaning roller either to contact or be separated from the outer circumferential surface of the transfer roller. In addition, the apparatus further includes a waste ink mechanism which removes waste ink on the outer circumferential surface of the cleaning roller, and a discharge mechanism which discharges the removed waste ink. Therefore, after waste ink remaining on the optical photoreceptor is transferred to the transfer roller, the waste ink remaining on the outer circumferential surface of the cleaning roller can be removed, and the waste ink moving and adhering to the outer circumferential surface of the cleaning roller can be removed.
Abstract:
This invention relates to a polymer having functional groups at both terminals comprising the steps of: preparing a difunctional initiator by recating divinyl aromatic material and an organo-lithium compound in the presence of a hydrocarbon solvent; synthesizing a random copolymer derived from an aromatic vinyl and conjugated diene monomer at only one terminal of two anionic terminals; adding a polar additive to activate both terminals of said copolymer, followed by the addition of an electrophilic material. The polymer material, so prepared, has an excellent combination of properties such as improved rolling resistance for use in making tire rubber treads, since it can enhance the polymer-filler interaction.
Abstract:
An optical disk reading apparatus and method compensate for errors in the full period of an EFM signal. An RF amplifier converts an optical signal reflected from an optical disk into an analog electrical signal. A signal converter converts the analog signal into a digital signal which is modulated to provide an EFM signal. A full period compensating portion compensates for full period errors in the EFM signal and outputs the error compensated EFM signal. An error correcting portion corrects the errors of the compensated EFM signal using an error correction code. Image quality is improved by removing the full period errors.