Abstract:
Provided is a method for fabricating a metal oxide thin film in which a metal oxide generated by a chemical reaction between a first reactant and a second reactant is deposited on the surface of a substrate as a thin film. The method involves introducing a first reactant containing a metal-organic compound into a reaction chamber including a substrate; and introducing a second reactant containing alcohol. Direct oxidation of a substrate or a deposition surface is suppressed by a reactant gas during the deposition process, as it uses alcohol vapor including no radical oxygen as a reactant gas for the deposition of a thin film. Also, since the thin film is deposited by the thermal decomposition, which is caused by the chemical reaction between the alcohol vapor and a precursor, the deposition rate is fast. Particularly, the deposition rate is also fast when a metal-organic complex with beta-diketone ligands is used as a precursor. Further, a thin film with low leakage current can be obtained as the metal oxide thin film fabrication method using a chemical vapor deposition or atomic layer deposition method grows a thin film with fine microstructure.
Abstract:
An asymmetric error correction apparatus and method, and clock recovering apparatus and data recovering apparatus for a system for reading data from an optical recording medium such as a CD or DVD that has a multi-level input signal and irregular characteristic of zero-crossing transition. The signal inputted from the optical recording medium is digitized, and a zero-crossing detector extracts four sequential samples and detects a zero-crossing point from the two intermediate samples. An asymmetric error detector judges an asymmetric state and asymmetric polarity of the digital signal from a sum of the two side samples among the four samples if the zero-crossing point is detected. A correction section accumulates the judged asymmetric polarities, judges an asymmetric error of the digital signal if the accumulated value exceeds a predetermined threshold, and corrects the asymmetric error of the read signal caused by an inaccurate pit length.
Abstract:
PURPOSE: A method of forming a high dielectric layer using an atomic layer deposition method and a method of manufacturing a capacitor having the high dielectric layer are provided to improve leakage current characteristics by reducing defects in the high dielectric layer. CONSTITUTION: A precursor including metal elements is supplied and a purging process is performed. An oxidizing agent is supplied and a purging process is performed. A reaction source including a nitrogen element is supplied and a purging process is performed. The precursor including metal elements is formed with an Hf precursor and a high dielectric layer is formed with an HfON layer.
Abstract:
PURPOSE: A non-volatile semiconductor memory device is provided to control effectively trap density according to doping concentration and to improve operation speed by forming an OHA(Oxide-Hafnium oxide Aluminium oxide) layer in a gate stack structure. CONSTITUTION: A semiconductor substrate(40) includes a source(S) and a drain(D) spaced apart from each other. A gate stack structure for contacting the source and drain is formed on the semiconductor substrate. The gate stack structure is composed of a tunneling layer(42), the first trap material layer(44), the first insulating layer(46) and a gate electrode(48). The first trap material layer and the first insulating layer have larger permittivity than a nitride layer. The first oxide layer is formed between the tunneling layer and the first trap material layer. The second oxide layer is formed between the first trap material layer and the first insulating layer. The first oxide layer is made of Al2O3. The first insulating layer is made of one selected from a group consisting of HfO2, ZrO2, Ta2O5, and TiO2.
Abstract:
A capacitor for use in a semiconductor device, a method of fabricating the capacitor, and an electronic device adopting the capacitor are provided. The capacitor includes upper and lower electrodes, each formed of a platinum group metal; a thin dielectric layer disposed between the upper and lower electrodes; and a buffer layer disposed between the lower electrode and the thin dielectric layer, the buffer layer including a metal oxide of Group 3, 4, or 13.
Abstract:
PURPOSE: A magnetic RAM comprising a middle oxide formed in a heterojunction method and its fabrication method are provided to prevent MR(Magnetic Ratio) from being reduced according to the damage of a bottom film quality of a tunneling oxide film of a MTJ layer. CONSTITUTION: An active region(AA) and a field area(FA) are set on a semiconductor substrate(40). An oxide(42) for isolation is formed on the field area. A gate stacked material(44) including a gate electrode is formed on the active area. A source(46) and a drain(48) are formed on the active region on both sides of the gate stacked material. Thus, a transistor is formed on the semiconductor substrate. The transistor is turned on when data is recording on a MTJ layer(62), and is turned off when data is read from the MTJ layer.
Abstract:
PURPOSE: A frequency error detector using histogram information of an input signal and a detecting method thereof are provided to detect a frequency error by using a synchronous signal and a period signal of data information. CONSTITUTION: An A/D converter(100) is used for converting an analog signal to a digital signal. A zero crossing point detector(110) is used for detecting a zero crossing point by detecting a code change of the digital signal. A period information detector(120) is used for detecting period information corresponding to a period signal. A histogram information production unit(140) produces error detection target histogram information by using the period information. A frequency error calculator(150) is used for calculating a frequency error by using a difference value between the error detection target histogram information and the reference histogram information.
Abstract:
PURPOSE: A method for forming an oxide film having high dielectric constant, a capacitor comprising dielectric film formed by the method and a method for manufacturing the same are provided to reduce the number of ALD apparatuses by using chemical reaction between precursors of aluminum and hafnium. CONSTITUTION: A semiconductor substrate(40) is loaded into an ALD apparatus. A reactant is deposited on an upper surface of the semiconductor substrate. The reactant includes the first reacting element and the second reacting element. The first high dielectric oxide layer(50a) including the first and the second reacting elements is formed on the upper surface of the semiconductor substrate by oxidizing the first and the second reacting elements.
Abstract:
본 고안은 모니터에 설치되는 액정패널 조립체에 관한 것이다. 본 고안에 따른 모니터용 액정패널 조립체는, 지지브라켓의 스터드에 삽입부가 형성되어 있으며, 액정패널과 지지브라켓과의 결합을 위하여 액정패널이 스터드에 놓여질 때 그 스터드의 삽입부가 액정패널의 관통부에 삽입되어 액정패널의 위치를 결정하도록 구성되어 있으므로, 액정패널과 지지브라켓의 결합작업이 용이하고 정확하게 행해질 수 있다.
Abstract:
PURPOSE: A piezo-electric transducer driver circuit is provided to reduce load of micro controller by using a direct memory access system, while reducing dormancy period in printing. CONSTITUTION: A piezo-electric transducer driver circuit comprises an MPU(10) of a micro controller for controlling overall operation; a memory(12) of SRAM type for storage of sampling data of driving waveform; a flip-flop(F1) and a DAC(13) for transmitting and receiving sampling data of driving waveform to and from the memory, and generating an analog waveform; an LPF(14) for removing high frequency quantizing noise from the analog output waveform of the DAC; and an address generator for generating addresses of the memory in a repeated and sequential manner during the cycle of the driving waveform so as to utilize a direct memory access system. The address generator includes an oscillator(11) for generating a specific frequency; a counter(A1) for counting, through an external trigger, the frequency generated from the oscillator; and a comparator(C1) for comparing the signal output from the counter and the address output from the MPU, and providing the result of the comparison as a driving signal for the flip-flop.