Abstract: A pseudo dual port memory device in which an operating speed is improved and stability is increased is provided. The pseudo dual port memory device may include a memory cell, a pair of bit lines connected to the memory cell, a write driver, a sense amp, and a column multiplexer which is connected to the bit lines, receives a write multiplexer control signal and a read multiplexer control signal, connects the bit lines to the write driver in response to the write multiplexer control signal, and connects the bit lines to the sense amp in response to the read multiplexer control signal. A precharge control signal generation circuit which is connected to the column multiplexer may generate a precharge control signal on the basis of the read and write multiplexer control signals, and a bit line precharge circuit may precharge the bit lines based on the precharge control signal.

Abstract: A pseudo dual port memory device in which an operating speed is improved and stability is increased is provided. The pseudo dual port memory device may include a memory cell, a pair of bit lines connected to the memory cell, a write driver, a sense amp, and a column multiplexer which is connected to the bit lines, receives a write multiplexer control signal and a read multiplexer control signal, connects the bit lines to the write driver in response to the write multiplexer control signal, and connects the bit lines to the sense amp in response to the read multiplexer control signal. A precharge control signal generation circuit which is connected to the column multiplexer may generate a precharge control signal on the basis of the read and write multiplexer control signals, and a bit line precharge circuit may precharge the bit lines based on the precharge control signal.

Abstract: A system for producing carbon nanotubes includes a reaction chamber in which a process is performed for producing a carbon nanotube on a synthetic substrate; a station part disposed at one side of the reaction chamber and provided with a first transporter for loading/unloading the synthetic substrate to/from the reaction chamber; a first transporter installed inside the station part for loading/unloading synthetic substrates to/from the reaction chamber; a substrate accommodating part in which a substrate to be loaded to the reaction chamber is accommodated or a synthetic substrate unloaded from the reaction chamber waits; a retrieve part for drawing out a synthetic substrate from the substrate accommodating part to retrieve a carbon nanotube produced on the synthetic substrate; a catalyst coating unit configured for coating a synthetic substrate with a catalyst before the synthetic substrate is accommodated in the substrate accommodating part of the station part; and a second transporter for transporting a s

Abstract: Apparatus and method for compounding carbon nanotubes are provided to uniformly supply a source gas used to compound carbon nanotubes, efficiently exhaust the source gas, and increase a retrieve rate of the carbon nanotubes. According to the apparatus and method, carbon nanotubes are massively compounded.

Abstract: An apparatus for depositing organic compounds is provided to deposit predetermined organic films on a substrate. The apparatus includes a deposition chamber, a support member provided inside the deposition chamber and supporting the substrate to make a deposition surface of the substrate face downwardly, a vaporizer installing portion in which an organic vaporizer is installed to vaporize organic compounds to the deposition surface of the substrate, and a vaporizer replacing portion disposed adjacent to the vaporizer installing portion to replace the organic vaporizer. According to the apparatus, organic vaporizers for vaporizing organic compounds are replaced automatically.

Abstract: A system for producing carbon nanotubes includes a reaction chamber in which a process is performed for producing a carbon nanotube on a synthetic substrate; a station part disposed at one side of the reaction chamber and provided with a first transporter for loading/unloading the synthetic substrate to/from the reaction chamber; a first transporter installed inside the station part for loading/unloading synthetic substrates to/from the reaction chamber; a substrate accommodating part in which a substrate to be loaded to the reaction chamber is accommodated or a synthetic substrate unloaded from the reaction chamber waits; a retrieve part for drawing out a synthetic substrate from the substrate accommodating part to retrieve a carbon nanotube produced on the synthetic substrate; a catalyst coating unit configured for coating a synthetic substrate with a catalyst before the synthetic substrate is accommodated in the substrate accommodating part of the station part; and a second transporter for transporting a s

Abstract: Apparatus and method for compounding carbon nanotubes are provided to uniformly supply a source gas used to compound carbon nanotubes, efficiently exhaust the source gas, and increase a retrieve rate of the carbon nanotubes. According to the apparatus and method, carbon nanotubes are massively compounded.