Abstract:
A digital to analog converter, a source driver and a liquid crystal display apparatus are provided to implement the high resolution by supplying the gamma voltage which is independent according to the channel. A digital to analog converter(360) comprises a decoder(410), gamma reference voltage decoding units(420,430) and active resistance string part(440). The decoder selects the second gamma voltages of (N-2-P) multiplication of 2 and supplies. The reference voltage decoding unit supplies the first and second gamma reference voltages. The active resistance string part is comprised of transistors. The transistor corresponds to a part among the second gamma voltages and has the same gate-source voltage. The source driver comprises a register part, a shift transistor part, a data latch part, a digital to analog converting part and an output buffer.
Abstract:
액정표시장치의 소오스 구동부에서 높은 슬루율을 갖는 출력 버퍼가 개시된다. 본 발명에 따른 소오스 구동부에서 출력버퍼는 입력신호 및 궤환된 출력신호를 차동 입력하여 입력신호와 반전된 특성을 갖는 풀업(다운) 신호와, 입력신호를 차동 증폭한 제1제어신호를 발생하는 차동 증폭부, 소정의 바이어스 전압과 제1제어신호에 응답하여 구동되며, 제1제어신호에 반전된 특성을 갖는 제2제어신호를 생성하는 제어부 및 상기 풀업(다운) 신호와 제2제어신호에 응답하여 공급 전원 레벨로 충전 또는 접지 전원 레벨로 방전되면서 입력신호를 쫓는 출력 신호를 발생하는 출력부를 포함하는 것을 특징으로 하며, 쵸핑방법을 이용하여 출력 버퍼를 구성하더라도 높은 슬루율 특성을 얻을 수 있다.
Abstract:
A high slew rate amplification circuit for driving a thin film transistor(TFT)-liquid crystal display(LCD) device is provided to improve slew rate characteristics and thus to remove afterimage phenomenon. The high slew rate amplification circuit comprises OP amps(604,606), and a pull-up transistor(612) connected to an output port of the OP amp. A pull-down transistor(610) is connected to the output port of the OP amp. And control circuits(608,616) enable selectively the pull-up transistor and the pull-down transistor respectively. The control circuits activate the pull-up transistor and the pull-down transistor for a shorter time than a half of a polarity signal period.
Abstract:
PURPOSE: A susceptor for supporting a semiconductor substrate and a processing apparatus having the same are provided to be capable of preventing process gas from flowing to the rear surface of the semiconductor substrate by using a gas inflow preventing wall. CONSTITUTION: A susceptor(200) for supporting a semiconductor substrate is installed in a chamber, wherein the chamber is used for processing the semiconductor substrate. The susceptor is provided with a circular plate(202) for supporting the semiconductor substrate and a gas inflow preventing wall(204) installed at the upper portion of the circular plate for supporting the edge portion of the semiconductor substrate and preventing process gas from flowing between the semiconductor substrate and the plate.
Abstract:
PURPOSE: A source driver and a display device thereof are provided to prevent damage to a decoder device by generating a plurality of gamma voltages. CONSTITUTION: A power supply part(10) outputs a plurality of reference voltages during a power-up operation. The power supply part uses a stabilized power supply voltage. A gamma voltage output part(30) generates a plurality of gamma voltages by using the power supply voltage. The gamma voltage output part generates the plurality of gamma voltages by using a plurality of reference voltages. A source driver comprises a decoding part(40). The decoding part selects at least one voltage among the plurality of gamma voltages.
Abstract:
A method of rinsing semiconductor fabricating equipment is provided to remove the byproduct of (NH4)2SiF6 generated when removing a natural oxide layer which is soluble by using water. An etching gas containing ammonia and nitrogen trifluoride is supplied on a wafer(W) with a natural oxide layer(100a). The etching gas is reacted with the natural oxide layer by generating plasma to form a byproduct of ammonium fluorosilicide. The wafer is heated to absorb the byproduct in semiconductor manufacturing equipment, and then the byproduct is removed by using water.
Abstract:
박막 트랜지스터-액정 표시 장치 구동을 위한 슬루 레이트가 큰 증폭회로가 개시된다. 상기 증폭회로는 슬루 레이트 특성을 개선한다. 따라서, 액정 표시 장치(LCD)의 소오스 라인 구동을 위하여 출력 버퍼에 사용되는 경우에 부하를 빠른 시간에 충방전시키므로 잔상 효과를 제거할 수 있는 효과가 있다.
Abstract:
프레임 상쇄 및 하프 디코딩 방법을 채용하는 TFT-LCD 소스 드라이버 및 소스 라인 구동 방법이 개시된다. 본 발명의 TFT-LCD 소스 드라이버는 다수개의 채널들 중 2 채널 마다 소스 라인 구동 전압을 출력한다. 정극성의 제1 및 제2 그레이 스케일 전압을 발생하는 정 하프 디코더와 부극성의 제1 및 제2 그레이 스케일 전압을 발생하는 부 하프 디코더의 출력이 쵸핑 제어 신호에 응답하는 쵸핑 먹스부를 통해 선택적으로 제1 및 제2 출력 버퍼로 전달된다. 제1 및 제2 출력 버퍼의 출력은 극성 제어 신호에 응답하는 극성 먹스부를 통해 제1 및 제2 채널로 출력된다. 이에 따라, 정해진 프레임 동안 2개의 채널로 2 그레이 스케일 차이를 갖는 구동 전압을 반복적으로 출력함으로써, 그 중간에 해당하는 그레이 스케일 전압이 출력되는 것처럼 보이게 한다.
Abstract:
PURPOSE: A dry etch apparatus is provided to prevent a floating phenomenon of byproducts in the inside of a process chamber by increasing an absorbing force for absorbing the byproducts in a dry etch process. CONSTITUTION: An electrostatic chuck(104) is installed in the inside of a process chamber(102) in order to grasp a semiconductor substrate(100). A grasping portion is projected to an upper face portion of the electrostatic chuck(104). A gas supply portion(106) is connected with an upper portion of the process chamber(102). An upper electrode(108) is used for supplying RF power. A lower electrode is formed in the inside of the electrostatic chuck(104). A driving portion(110) is connected with a lower portion of the electrostatic chuck(104) in order to drive the electrostatic chuck(104) to an upper or a lower direction. A baffle plate(112) is installed at a side of the electrostatic chuck(104). A door(114) is installed at one side of the lower portion of the process chamber(104). A vacuum pump(116) and a valve(118) are connected with the other side of the lower portion of the process chamber(104). A shadow ring(120) is installed on an upper portion of the electrostatic chuck(104).
Abstract:
PURPOSE: A dry etching apparatus including a focus ring surrounding a chuck is provided to prevent generation of a particle on a wafer by preventing reaction by products from being accumulated between a focus ring and the wafer. CONSTITUTION: A wafer(100) is installed on a chuck(200). A focus ring(400) surrounds an outer peripheral surface of the chuck(200). The chuck(200) uses an electrostatic force. The focus ring(400) is attached on a lateral part of the chuck(200) by a support part(300). There is generated a step difference on edge portions of the chuck(200). A part of the focus ring(400) is coupled with the step difference portions. A surface on which the focus ring(400) is seated has the same altitude as the chuck(200). The surface on which the focus ring(400) is seated is formed to be adjacent to the outer peripheral surface of the chuck(200). For the purpose of compensating an etched amount of edge portions of the wafer(100) which is seated on the surface(410), the focus ring(400) is formed of a material similar to that of the wafer(100). For example, the focus ring (400) is formed of silicone.