Abstract:
Provided are a CMP slurry composition for polishing polycrystalline silicon which is improved in polishing uniformity and selectivity by reducing the surface defect of a wafer, and its preparation method. The CMP slurry composition comprises a metal oxide; a quaternary ammonium base compound; and 0.001-1 wt% of a fluorine-based surfactant represented by CF3(CF2)nSO2X, wherein n is 1-20; X is COOR, RO, (OCH2CH2)n' or (OCH2CH(OH)CH2)n'; R is a C1-C20 alkyl group; and n' is 1-100. Preferably the metal oxide is at least one selected from the group consisting of SiO2, Al2O3, CeO2, ZrO2 and TiO2 and has a primary particle size of 10-200 nm and a specific surface area of 10-300 m^2/g; and the quaternary ammonium base compound is at least one selected from the group consisting of tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrapropylammonium hydroxide and tetrabutylammonium hydroxide.
Abstract:
터널링 절연층 위에 고분자 박막 내에 자발형성된 Ni 1-x Fe x (0 1-x Fe x 를 스퍼터링하는 단계, 상기 스퍼터링된 Ni 1-x Fe x 층 상에 절연체 고분자 단량체를 포함하는 산성 전구체를 용매에 녹여 스핀 코팅하고 잔여 용매를 제거하는 단계 및 상기 코팅된 고분자 물질 내부에서 Ni 1-x Fe x 나노결정체가 형성되도록 상기 고분자 물질에 열을 가하는 단계를 포함하는 플래쉬 메모리 소자의 제조방법에 따르면 Ni 1-x Fe x 나노결정체의 크기와 밀도의 조절이 용이하며 이를 통하여 나노 플로팅 게이트의 성능을 향상시킬 수 있다. 플래시 메모리, 나노결정체, 플로팅 게이트, 고분자 박막, 터널링 절연층
Abstract:
디램의 커패시터들을 제공한다. 상기 캐패시터들은 반도체 기판 상에 반도체 제조 공정을 통해서 하부전극들이 쓰러지지 않도록 하는 방안을 제시해준다. 이를 위해서, 활성 영역의 반도체 기판 상에 두 개의 도전막 패턴들이 배치된다. 상기 도전막 패턴들의 상면들의 소정 영역들과 각각 접촉하는 하부전극들이 배치된다. 상기 도전막 패턴들의 상면들의 다른 영역들 상에 지지 패턴들이 각각 배치된다. 그리고, 상기 지지 패턴들, 도전막 패턴들 및 반도체 기판 상에 반도체 막이 덮인다. 커패시터, 하부전극, 반도체 기판.
Abstract:
PURPOSE: A D-class type power amplifier for preventing an over-response phenomenon in a turning process of an abnormal state to a normal state is provided to restrain a saturation state of an integral controlling circuit or a proportional integral controlling circuit by performing a sub negative feedback loop operation. CONSTITUTION: A sum circuit(100) is used for summing up an input signal and a negative feedback signal and outputting an error signal. An integral controlling circuit(200) is used for integrating the error signal and an integral signal. A feedback controller(300) is used for outputting a switching control signal in response to a monitoring signal. A switching circuit(400) is used for receiving the integral signal and outputting the integral signal to the auxiliary loop direction or the normal state loop direction. A sub negative feedback circuit(500) is used for outputting an auxiliary negative feedback signal of negative feedback signals which are generated from an integral signal process. A controlled circuit(600) is used for modulating the integral signal to a PWM signal and outputting an output signal generated from a switching amplification process and an LPF filtering process. A steady-state negative feedback circuit(700) is used for outputting a steady-state negative feedback by processing the output signal of the controlled circuit.
Abstract:
PURPOSE: An apparatus for managing link states of subscriber boards in a switch system is provided to easily manage the link states of the subscriber boards of the switch system by simply managing link states of standby subscriber boards. CONSTITUTION: A standby board link state monitor unit(30) monitors link states of a plurality of standby subscriber boards and outputs a plurality of second link state information. A link selecting unit(24) connects a plurality of active subscriber boards to a plurality of active board link state detecting units(26), and successively connects a plurality of the standby subscriber boards to the standby board link state monitor unit(30), by the control of a local processor unit(32). A link state managing unit(28) receives a plurality of first link state information, and transmits received first link state information to a plurality of the active subscriber boards. The link state managing unit(28) successively receives a plurality of second link state information and transmits received second link state information to a plurality of the standby subscriber boards. The local processor unit(32) receives a state conversion control signal, and controls the link selecting unit(24) so that the active subscriber boards and the standby subscriber boards connect to the active board link state detecting units(26) and the standby board link state monitor unit(30).
Abstract:
PURPOSE: A method and an apparatus for synchronizing a base station in a mobile communication system are provided to perform the synchronization of the base station by acquiring the system time difference between a primary base station and a secondary base station through a wireless link and adjusting a system time of the secondary base station. CONSTITUTION: A secondary base station judges a sign of a system time difference(641). If the sign of the system time difference is a positive number, the secondary base station moves its system time forward by a time(T track) because a system clock of the secondary base station is slower than a system clock of a primary base station(643,645,647). If the sign of the system time difference is a negative number, the secondary base station moves its system time backward by the time(T track) because the system clock of the secondary base station is faster than the system clock of the primary base station(644,646,648).
Abstract:
PURPOSE: A method for manufacturing a trench isolation layer of a semiconductor device is provided to prevent a gate electrode from being short-circuited by making a dented region not formed in the upper portion of a trench, and to reduce manufacturing time and cost by simplifying a manufacturing process. CONSTITUTION: A pad oxide layer is formed on a semiconductor substrate(100). A plasma-enhanced SiON(PE-SiON) layer is formed on the pad oxide layer. A photoresist pattern is formed on the PE-SiON layer to define an isolation region. The PE-SiON layer is etched by using the photoresist pattern as a mask until the pad oxide layer is exposed. After the photoresist pattern is eliminated, oxygen ions are implanted to the isolation region by using the patterned PE-SiON layer as a mask. The oxygen ions-implanted semiconductor substrate is annealed so that silicon reacts with oxygen to form the trench isolation layer(108) composed of a silicon oxide layer. The PE-SiON layer and the pad oxide layer are eliminated.
Abstract:
PURPOSE: A compressor of a multiplier is provided to compress partial data additionally generated from an operation of an encoder so that it can prevent a wrong operation of the multiplier caused from the calculation of the partial data and reduce a layout area. CONSTITUTION: The compressor(300) comprises a plurality of compressors(300_1, 300_2, 300_n-1, 300n). The compression units(300_1, 300_2, 300_n-1, 300n) includes a plurality of 4 by 2 compressors(COM1, COM2, COM3, COM5) and at least one 9 by 2 compressor(COM4) and compresses the partial data(P_DATA) from the encoder(10). The compressor(300) compresses not only the partial data with a bit number set in advance by the encoder(10), but also the partial data additionally generated by a minus symbol used in a calculation process within the decoder(10).
Abstract:
PURPOSE: A method for operating a maintenance-use dual-parallel bus in an exchange system and a system thereof are provided to enable the maintenance part to efficiently manage the status of each part, and correctly to detect the chip with error as well as to provide the system with a simplified signaling structure among a number of parts. CONSTITUTION: In a maintenance system of an exchange system consisting of a maintenance part(100) and the 1 to 12 chip blocks(CHIP0-CHIP11), the maintenance part(100) and the first chip block(CHIP0) are connected through the first bi-directional transmission-use bus(MA-BUS). The maintenance part(100) and the twelfth chip block(CHIP11) are connected through the second bi-directional transmission-use bus(MS-BUS). The first through twelfth chip blocks(CHIP0-CHIP11) are connected in series, entirely through the loop.