baber/WOPTO huggingface dataset:
Patent KR-20000050863-A (KR)
Inventor: KIM BOK MAN
IPC: H01L25/04
Filed: 1999-01-15
Abstract: PURPOSE: A process for manufacturing a power module is provided to minimize a noise generated by a power switching device, by growing the thickness of a ceramic substrate to a proper dimension, by increasing the capacitance of a capacitor most seriously affected by the noise, and by forming a ground pad under a control integrated circuit. CONSTITUTION: A process for manufacturing a power module comprises nine steps. The first step is to prepare a lead frame having a frame and a plurality of leads formed by being extended to the exterior from the frame. The second step is to solder a power switching device on a part of the frame of the prepared lead frame. The third step is to prepare a ceramic substrate grown to a proper thickness, on which necessary circuit pattern is printed. The fourth step is to print a ground pad on the prepared ceramic substrate. The fifth step is to solder a control integrated circuit(IC) on the ground pad. The sixth step is to connect the control IC with a circuit device on the ceramic substrate by using the printed circuit pattern. The seventh step is to form a circuit pattern on the ceramic substrate by soldering peripheral devices separated a predetermined interval from the control IC. The eighth step is to adhere the ceramic substrate having the circuit pattern on the frame, the ceramic substrate being isolated a predetermined interval from the control IC. The ninth step is to wire the power switching device and the plurality of leads of the lead frame to the circuit pattern respectively.
Patent KR-19990068031-A (KR)
Title: 액정 디바이스 및 액정 디바이스의 어드레스 방법
IPC: G02F1/133
Filed: 1999-01-21
Abstract: 본 발명의 액정 디바이스는, 제2 세트의 전극에 인가된 데이터신호와 함께 제1 세트의 전극에 차례로 인가되는 주사신호에 의해 다중 상태로 어드레스된다.  상기 제1 및 제2 세트의 전극은 복수의 화소를 한정한다.  상기 장치에 의해 표시되는 패턴은 제2 세트의 전극에 인가된 파형을 결정하며 이 파형은 주파수의 첨두간에 변동할수 있다.  이는 장치의 성능, 특히 콘트라스트에 악영향을 준다. 이 문제를 해소하기 위해, 공지의 스트로브 펄스를 채용한 주사신호에 저주파 신호가 부가된다.  이는 데이터 신호 주파수의 첨두의 화소에 대한 영향을 감소시킨다.
Patent KR-19990045844-A (KR)
Filed: 1999-01-26
Abstract: 본 발명은 벌꿀이 함유하고 있는 의학적인 기능은 물론 각종미네랄과 비타민이 풍부한 벌꿀을 주원료로 하여 건강음료 수정과를 제조함으로써 맛과 영양소는 물론 향기면에서도 기존 수정과에 비해 기호도를 향상시킨 벌꿀수정과의 제조 방법을 제공한 것이다.
Patent KR-20000054997-A (KR)
Inventor: LEE HYEON CHEOL
IPC: H01L21/28
Filed: 1999-02-02
Abstract: PURPOSE: A metal film forming method is to reduce a process cost and a process time by forming a metal film having a plane upper surface without an additional reflow process. CONSTITUTION: A metal film(106) is electrically connected to a conductive structure(104) formed on a semiconductor substrate(100). A method for forming the metal film comprises the steps of: heating the semiconductor substrate up to a melting point of the metal film; and depositing the metal film on the semiconductor substrate. The step of depositing the metal film on the heated semiconductor substrate is accompanied with a reflow process. That is, the metal film depositing process and the reflow process are simultaneously performed. The heating of the semiconductor substrate and the depositing of the metal film are performed within the same chamber.
Patent KR-19990045885-A (KR)
Title: 레이저를이용한단추가공시스템
Filed: 1999-02-05
Abstract: 본 발명은 단추시편의 앞면과 뒷면 위치를 선별하여 공급하고, 이러한 단추시편을 레이저 헤드에 정확히 위치시켜 레이저를 이용하여 요구되는 형상 또는 문자 등을 조각하며, 조각 가공된 단추의 카운팅 및 포장이 이루어지도록 하는 레이저를 이용한 단추 가공시스템에 관한 것으로서, 이를 위한 구성은 가공이 요구되는 단추시편의 앞면이 상측으로 향하도록 선별하여 계속적으로 일렬 배치시키는 공급부와; 상기 공급부의 단부에 대향 설치되어 이송되는 단추시편의 위치를 설정하는 스토퍼와; 상기 공급부의 단부 하측에 대응하여 선택적으로 승· 하강 및 회전 가능하게 설치된 로봇아암을 이용하여 단추시편을 상기 공급부로부터 인계 받아 소정 위치로 이송토록 하는 중개부와; 상기 로봇아암에 의해 이송 위치되는 단추시편의 양측 측부를 선택적으로 가압 고정하는 홀더와; 상기 홀더에 고정되는 단추시편에 수직 대향하도록 설치된 레이저 헤드를 통해 단추시편의 앞면에 대응하여 레이저 광선을 제공하여 조각하도록 하는 레이저 가공부와; 상기 홀더의 일측에 설치되어 레이저 광선에 의해 증발되는 각종 형태의 먼지를 제거하도록 하는 진공 흡입부; 및 상기 각 구성의 구동 속도, 작업량 제어 및 상기 레이저 헤드 부위의 온도를 제어하도록 하는 제어부;를 포함하여 이루어진다. 
     따라서, 본 발명에 의하면, 공급부의 구성에 의해 단추시편의 앞면과 뒷면 위치를 선별하여 공급하게 되고, 이들 단추시편은 중개부와 홀더에 의해 레이저 헤드에 대향하여 정확히 위치되고, 레이저 헤드를 통해 단추시편에 요구되는 형상 또는 문자 등을 정밀하게 조각하여 단추를 완성하게 되며, 조각 가공된 단추의 카운팅 및 포장 과정이 신속하고 용이하게 이루어짐에 따라 작업 시간의 단축과 작업자의 노동력 감소 및 단추에 대한 조각의 정밀도를 신뢰할 수 있는 효과가 있다. 
     또한, 레이저 헤드에 대응하여 단추시편을 각각 이송하여 조각 공정을 수행하게 됨에 따라 레이저 가공장치를 포함한 설비 규모가 축소되어 넓은 작업 공간을 확보하게 되고, 그에 따른 설비 비용이 감소되는 경제적인 이점이 있다. 
     그리고, 다양한 단추의 형상에 대응하여 레이저 가공의 수정 변경이 용이하게 이루어짐에 따라 단추의 다변화에 대응하기 용이한 이점이 있다.
Patent KR-20000056014-A (KR)
Inventor: JU YANG SEONG
IPC: G11C29/26
Filed: 1999-02-12
Abstract: PURPOSE: A semiconductor memory device having multi-bank memory arrays is provided to reduce testing time by simultaneously accessing many memory banks to simultaneously write data having same values in same locations of the memory banks, and by combining the written data to output the data. CONSTITUTION: A semiconductor memory device having multi-bank memory arrays is composed of a bank selector(8'). The bank selector is composed of four NAND gates(N81-N84) and one inverter(INV81). The first NAND gate applies a NAND combination to a bank selecting address signal(A11) and a bank enable signal(BANKEN), and outputs a first signal(O1). The second NAND gate applies a NAND combination to the bank selecting address signal and the enable signal, and outputs a second signal(O2). The third/the fourth NAND gates combine all bank selecting signals(ALLBANKs) reversed from the two signals(O1,O2), and output two bank enable signals(XBANK1,XBANK2) to first/second memory banks(6,7). The ALLBANKs makes an entire system simultaneously enable the first/the second memory banks. A controller or a command decoder sets up ALLBANKs. If the reversed ALLBANKs are high levels, the bank enable signals are decided by the signals(O1,O2). The memory banks are selectively enabled by the two signals(O1,O2).
Patent KR-20000056249-A (KR)
Inventor: SONG WON SANG
IPC: H01L29/70
Filed: 1999-02-18
Abstract: PURPOSE: A method for manufacturing a field effect transistor(TFT) is provided to reduce a parasitic capacitance caused by a gate fringe capacitance by stably forming an air gap in a region where a dielectric layer of the gate spacer is formed. CONSTITUTION: A method for manufacturing a field effect transistor(TFT) comprises the steps of: forming a gate pattern including a gate electrode on a semiconductor substrate in which an isolation process is carried out, a capping layer on the gate electrode, and a first gate spacer surrounding a sidewall of the gate electrode and the capping layer; forming a multi-layered epitaxial layer having a raised structure on the semiconductor substrate having the gate pattern; depositing and etching an insulation layer for a second gate spacer on a resultant structure having a stack of the epitaxial layer, so as to form the second gate spacer which is lower than the first gate spacer in height, the second gate spacer covering a facet of an edge of the epitaxial layer; forming a third gate spacer on the second gate spacer and on a sidewall of the first gate spacer after depositing and etching an insulation layer for the third gate spacer on the resultant structure; performing a wet-etching to eliminate the capping layer and the second gate spacer; forming a first and second silicide layers on the gate electrode and the epitaxial layer; and forming an interlayer dielectric covering the resultant structure.
Patent KR-20000059607-A (KR)
Inventor: KWON DAE IK
IPC: G11B7/09
Filed: 1999-03-05
Abstract: PURPOSE: A method for controlling an optical disk tracking is provided to stably perform a tracking servo by compulsorily reducing DC offset if DC offset of the tracking error signal is very large. CONSTITUTION: A record reproducing device includes a land and a groove, and records a data to the land and the groove. DC offset of a tracking error signal is measured about the land and the groove. If the DC offset of the measured tracking error signal is beyond a predetermined reference range, DC offset of the tracking error signal is regulated for the reference range. A tracking servo is performed while performing a record play operation with the regulated DC offset. Thereby, DC offset is compulsorily reduced when the DC offset of the tracking error signal is very large.
Patent KR-20000061396-A (KR)
Inventor: JUNG YU HO
IPC: H01L27/12
Filed: 1999-03-25
Abstract: PURPOSE: An X-ray detecting device is provided to reduce an off-current by decreasing the leakage current of a thin film transistor(TFT) driving the X-ray detecting device. CONSTITUTION: An X-ray detecting device comprises a photoelectric converting unit, a charge storing unit and a switching unit. The photoelectric converting unit receives X-ray light and generates a charge according to the quantity of the received light to increase the quantity of a storage capacitor(S) of the X-ray detecting device. The charge storing unit includes a pixel electrode(62) for collecting the charge generated from the photoelectric converting unit, contacting a first storage electrode, a dielectric layer evaporated on the first storage electrode, a second storage electrode(60) on the dielectric layer and the whole area of the second storage electrode. The switching unit controls a discharge of the charge stored in the storage capacitor.
Patent KR-20000006609-A (KR)
Inventor: KIM JIN HOE
IPC: C04B18/30
Filed: 1999-04-06
Abstract: PURPOSE: Construction materials are provided by solidifying a sludge of wastewater, sanitary sewage and water clarifying. CONSTITUTION: 50- 100 Kg of dolomite per one cubic meter of the sludge and 70- 120 weight % of fly ash, 100- 200 weight % of by-product lime, 10- 40 weight % of sodium carbonate and magnesium sulfate to the dolomite content are mixed to give a powdered solidifying agent. The solidifying agent and the wastewater sludge are mixed and stirred to give the construction materials as a fill material, and a soil cover material.
Patent KR-20000062078-A (KR)
Inventor: LEE CHANG JIN
IPC: D21H21/14
Filed: 1999-03-30
Abstract: PURPOSE: A wall paper containing sericite, a kind of montmorillonite-based mineral, that improves the physical vitality of human is provided. CONSTITUTION: To achieve the beforementioned purpose, firstly a predetermined amount of sericite is collected, screened, and disinfected to remove harmful factors. And then, the processed sericite is put in a container which is full of water. As time goes by, the mixture consisted of water and sericite is separated into two layers, i.e sediments precipitate at the bottom part and sericite supernatant is located in the upper part. The sericite supernatant is applied as an ingredient of additives for wallpaper in the preparation process of sorts of wallpapers.
Patent KR-20000066245-A (KR)
Inventor: LEE BYEONG CHEOL
IPC: G01P3/40
Filed: 1999-04-14
Abstract: PURPOSE: A rotational frequency counting device of a meter figure wheel is provided to reduce consumption power by providing an input signal driving an emitting device as pulse type. CONSTITUTION: In a meter displaying the used amount of the supplied object by accumulating rotational frequency of a plurality of figure wheels(30a), a rotation sensor of the figure wheel of the meter includes a reflex tape(40) adhered to the external surface of the one or more figure wheels for reflecting incident light, a pulse generator(100) for generating a pulse heat signal, rotation detecting parts(110,120,200) for generating incident light by using the pulse heat signal as driving power supply and converting the reflected light reflected by the reflex tape into an output pulse signal, and a rotational frequency counting part detecting the rotational frequency of the figure wheel by examining the rapid change of the generation interval of the output pulse signal.
Patent KR-20000066960-A (KR)
Inventor: EUM SANG SUB
IPC: G06F3/0354
Filed: 1999-04-22
Abstract: PURPOSE: A mouse for the STAR CRAFT is provided to perform more functions than a conventional mouse by adding some functions to each button of the conventional ball mouse so that a game user may enjoy the STAR CRAFT without using a keyboard. CONSTITUTION: A mouse for the STAR CRAFT comprises a track ball and 3 buttons. Each button has 3 function keys so that the mouse can operate 9 functions. The button comprises one groove(10), other two grooves(11,12), and protrusions(13,14). The groove(10) has contacts(7-9) formed at a proper position of the mouse. The two grooves(11,12), and protrusions(13,14) are formed on an upper and a lower face of the button. In a state that the button is elastically supported by a spring installed at the groove(11), one button can operate 3 functions by switching on/off the contacts(7-9).
Patent KR-19990083413-A (KR)
Title: 자주식크레인
IPC: B60K17/16
Filed: 1999-04-22
Abstract: 제조가 용이한 구조이며, 충분한 프레임 강성을 확보하면서, 차체 높이를 낮추어서 승차감을 개선한다. 
     차륜(18R)을 회전가능하게 지지하는 차륜 지지부(19)를 차체 프레임(12)에 대하여 상하 이동 가능하게 현가한 자주식 크레인. 리어 디퍼런셜 기어(36)의 좌우 출력축과 차륜(18R)을 구동축(50)을 통하여 상대변위 가능하게 연결하고, 또한, 이들의 구동축(50)이 분기부(16)를 차폭방향으로 관통하도록 배치한다.
Patent KR-20000067314-A (KR)
Inventor: SHIM MYEONG HO
IPC: D06M15/21
Filed: 1999-04-27
Abstract: PURPOSE: A waterproof skin of bag comprising latticed structure woven in the shape of a mat using polypropylene resin and maintaining the grid structure without deformation is provided. CONSTITUTION: A waterproof skin of bag comprising latticed structure comprises a latticed woven skin which is stitched with a thread and to which a sponge layer(2) and a cloth(3) are deposited on the backside to prevent the deformation of the grid. The waterproof skin is prepared by a method comprising weaving polypropylene resin in the latticed shape to obtain a woven skin; stitching the woven skin in the latticed shape to obtain a first product; uniting the first product with a sponge to obtain a second product; and attaching a nylon cloth to the backside of the second product.
Patent KR-20000067554-A (KR)
Inventor: YOON SEOK YEONG
IPC: H01L27/10
Filed: 1999-04-29
Abstract: PURPOSE: A method for manufacturing a capacitor is provided to increase capacitance by changing the structure of polycrystalline formed on a side surface of an oxidation layer pattern. CONSTITUTION: A polycrystalline plug connected to a substrate(1) formed on an insulating layer(2) through a contact hole is formed, and an oxidation layer pattern(4) is formed on the plug. After polycrystalline silicon is evaporated on the entire surface on the oxidation layer pattern and insulating layer, physical damage is caused to the polycrystalline silicon to have the surface of the polycrystalline silicon have a plurality of step differences. The polycrystalline silicon of which a surface is uneven is dry-etched to form a polycrystalline silicon sidewall having a plurality of perforations on a side surface of the oxidation layer pattern. After the oxidation layer pattern is eliminated, a dielectric layer(6) and a polycrystalline silicon layer(7) are sequentially evaporated on the polycrystalline silicon sidewall and plug.
Patent KR-20000073310-A (KR)
Inventor: KANG HA GYU
IPC: E04G17/06
Filed: 1999-05-10
Abstract: PURPOSE: A plastic form tie is provided to facilitate the surface treatment after the dismantlement of form panel, and prevent the leakage, and reduce the cost and time for finishing after the dismantlement of form. CONSTITUTION: A plastic form tie is made of plastic and comprises; a body(121) formed in rectangular type with designated thickness; punched corners(122) which are formed in both side of the body; a notch(123) which is formed by chamfering the one end of the body; and numerous projected parts(124) which are formed away from the notch. The form construction method using form tie comprises the steps of; erecting the form panel during leaving space for wall in both side; inserting the plastic form tie(120) between panel and joint of panel; fixing the form panel by inserting a pin in the corner of plastic form tie; concreting and curing; dismantling the form panel and remove projected part in which the plastic form tie is exposed to the outside of concrete; and grinding the projected part which still remains in the concrete with grinder.
Patent KR-19990088337-A (KR)
IPC: H04W4/16
Filed: 1999-05-17
Abstract: 본 시스템에 있어서, DECT 표준을 만족시키는 전화기 핸드셋(HS1, HS2, HS3)은 공공 전화 교환기(3)로 연결된 기지국(2)으로 연결될 수 있거나, 무선 채널을 통해 이러한 교환기(3)에 직접 연결될 수 있다. 
     상기 기지국과 교환기는 음성 사서함을 각각 구비한다. 이러한 음성 사서함에 접속하기 위해서, 버튼이 상기 기지국(블록 30)이나 전화 교환기(블록 55)내에 위치한 음성 사서함을 확인 할 수 있도록 하기 위하여 이러한 핸드셋 상에 장착된다.
Patent KR-20000074324-A (KR)
Inventor: LEE HYO JIN
IPC: B41J3/60
Filed: 1999-05-20
Abstract: PURPOSE: A both side printing device of an electro-photographic processor is provided to improve a both side printing speed and minimize a whole size of a product by providing a plurality of paths for tuning up a paper and minimizing a path for returning a printing path to carry out printing of a back side of a sheet. CONSTITUTION: A both side printing device of an electro-photographic processor includes a main body(21), a paper supplying cassette provided in the main body and stacked with papers, a pick up roller(23) for picking up a paper from the paper supplying cassette, a resistor roller(24) for aligning a front end of the supplied paper, an image forming element(25) and a transferring roller(26) for forming images on the paper, a fusing roller for fusing the images of the paper, a paper discharging die(28) for discharging the paper of which images are fused, a plurality of elements for turning up the printed paper(31,32), a plurality of conveying rollers(35,36) for conveying the turned up paper to the resistor roller, a driving element for driving the paper turning up element and the conveying rollers, and position detecting elements(37-39) mounted in the paper turning up element and the conveying rollers for detecting a position of the paper to control a direction of the paper and conveying speed.
Patent KR-19990088605-A (KR)
Title: 외관검사장치및방법
IPC: H01L21/66
Filed: 1999-05-27
Abstract: 웨이퍼(W)의 동일 스캐닝 행 내에 배열된 복수의 칩들(C)이 소정의 칩들(C)을 구비한 그룹들로 분할된다.  각 그룹내의 칩들(C)의 이미지들은 더블디텍션으로 서로 비교된다.  한 그룹이 제 1, 제 2 및 제 3 칩들(C1, C2, C3)을 포함하면, 제1칩(C1)과 제2칩(C2)이 비교된 다음, 제1칩(C1)과 제3칩(C3)이 비교되고, 마지막으로, 제2칩(C2)과 제3칩(C3)이 이미지들이 검출되는 동안에 비교된다.   그러므로 칩들(C)의 수와 동일한 비교회수로 이미지들을 비교함으로써 주변칩들을 포함하는 모든 칩들(C)에 대하여 더블디텍션으로 결함들을 검사하는 것이 가능하다.
Patent KR-20010001046-A (KR)
Inventor: KIM HAK CHOUL
IPC: A01K75/04
Filed: 1999-06-01
Abstract: PURPOSE: A buoy for keeping things afloat or for fixing things at certain depth of water is provided, which makes the user convenient by being formed with a plurality of hooks. CONSTITUTION: The buoy for keeping things afloat or for fixing things at certain depth of water is characterized in that: it is a sphere-shaped and has a plurality of hooks(20) on its body; it can be used for the boat from overturning by being connected to others with the hooks(20) and fixed to the upper part of the boat.
Patent KR-20010001846-A (KR)
Inventor: KIM SEON HWA
IPC: G06F17/30
Filed: 1999-06-09
Abstract: PURPOSE: A voice database construction system and method is provided to reduce processes for recording and dividing recognized words by using a script file which includes information used for recording the voice and constructing the database. CONSTITUTION: A voice database construction system comprises a key input module(100), an A/D converter(200), a CPU(300), a ROM(400), a RAM(500), and a monitor(600). The key input module is for enabling a user to input data in relation with a voice. The A/D converter converts the voice, input through a microphone, into digital signals. The CPU(300) receives the data from the key input module(100) and the A/D converter(200), and outputs control signals corresponding to the data type. The ROM(400) receives the control signals from the CPU(300) and stores a drive program for constructing a voice database at the CPU(300). The RAM(400) also receives the control signals from the CPU(300) and sequentially stores the voice data at a database. The voice database construction drive program is stored in a script file comprising a system section and a record state section. The system section stores data necessary for constructing the voice database, for example, a script number, a system board, a sampling frequency, a coding type or a storage type. The record state section includes a name of a record word and a recording time.
Patent KR-20010003647-A (KR)
Inventor: LEE CHANG GYUN
IPC: H04W4/00
Filed: 1999-06-24
Abstract: PURPOSE: A method for announcing an inputted telephone number as a voice in a digital portable telephone is provided to announce a telephone number inputted by a user as the voice, so that the user can correctly confirm the telephone number under an audible state. The method is provided to make the user perceive the inputted telephone number without directly confirming a state of a displaying screen. CONSTITUTION: If a controller senses a key inputting generation, the controller decides whether a corresponding key is a number key(S220-230). If the corresponding key is a function key, the controller performs an operation corresponding to the inputted function key(S235). If the corresponding key is the number key, a displayer displays a number corresponding to the inputted number key(S240). The controller reads previously stored voice data from a voice data storage(S250). The controller converts the read voice data to output the converted voice data as an audible state through a speaker(S260).
Patent KR-20000006462-A (KR)
Inventor: PRITZ HANS GEOROG
IPC: C03B37/014
Filed: 1999-06-25
Abstract: PURPOSE: A simple device for producing a perform is provided to have a small change of density. CONSTITUTION: The production device for the SiO2 perform comprises:plural welding burners moved toward and backward at a repeated cycle according to a formed spare perform; a heat absorption unit(12) offered into the area around a returning point(7); a heat screen(13) installed inside the area of the returning point(7).
Patent KR-20010004045-A (KR)
Inventor: KIM HYEON SU
IPC: H01L21/334
Filed: 1999-06-28
Abstract: PURPOSE: A gate insulating film forming method of a semiconductor device is to ensure a thickness of a gate insulating film corresponding to a super high integration by using materials having a high inductance, and prevent an interface trap between a substrate and the gate insulating film and a reaction of a polysilicon film and the gate insulating film. CONSTITUTION: A method of forming a gate insulating film of a semiconductor device comprises the steps of: providing a semiconductor substrate(11) with an active region defined by a field oxide film; forming a gate insulating film(13) on the whole surface of the semiconductor substrate by an insulating film having a high inductance; thermal processing the gate insulating film; and forming a barrier nitride film(14) on the surface of the thermal processed gate insulating film. The gate insulating film is formed of an Al2O3 film. Also, the gate insulating film is formed at a thickness of 30-60 angstroms by an atom layer epitaxy process. The thermal processing is progressed under the temperature of 600-900 deg.C for 30-60 seconds.
Patent KR-20010004371-A (KR)
Inventor: CHO GWANG JUN
IPC: H01L27/10
Filed: 1999-06-28
Abstract: PURPOSE: A method for manufacturing a ferroelectric capacitor is provided to adjust the stoichiometry of Bi and Sr of a perovskite ferroelectric film using physical vapor deposition(PVD) process instead of a wet process. CONSTITUTION: The first conductive layer to form a storage electrode of a capacitor is formed on a semiconductor substrate. A Bi-layered material is deposited on the first conductive layer by a physical vapor deposition(PVD) method while oxygen is injected into a single target of the Bi-layerd material, an upper part of the semiconductor substrate and plasma. A thermal annealing process for crystallization of the Bi-layered material is performed to form a ferroelectric layer. The second conductive layer to form a plate electrode of the capacitor is formed on the ferroelectric layer. The second conductive layer, the ferroelectric layer and the first conductive layer are patterned to form the capacitor.