baber/WOPTO huggingface dataset:
Patent KR-19990007443-A (KR)
Title: 골프 클럽
IPC: A63B53/02
Filed: 1998-06-29
Abstract: 페이스멤버(10), 페이스멤버(10) 뒤에 위치한 오목한 헤드본체(12), 페이스멤버 설치용 오프닝을 가지는 오목한 헤드본체(12)에 용접될 샤프트 설치 파이프(24), 샤프트 설치 파이프(24)에 고정된 샤프트(26), 그리고 샤프트 설치 파이프(24)가 용접되는 오목한 헤드본체(12)의 예정된 위치에 샤프트 설치 파이프(24)가 접촉하여 샤프트 설치 파이프(24)의 고정 각도가 파이프 유지 홈(34)과 접촉되도록 하는 상태로 이미 설정되어 있는 오목한 헤드본체(12)에 관한 파이프의 고정 각도를 결정하는 방식으로 샤프트 설치 파이프(24)를 유지하는 파이프 유지 홈(34)을 구비하고, 페이스멤버(10)와 헤드본체(12)가 β형식 티타늄 합금 소재이고, 오목한 헤드본체(12)는 바깥쪽 전체에서 실질적으로 일정한 두께를 가지고 페이스멤버(10)보다 얇고, 샤프트 설치 파이프(24)가 파이프 유지 홈(34)에 용접되고, 페이스멤버(10)는 오목한 헤드본체(12)의 페이스멤버 설치부(14)에 용접되는 골프 클럽이 제공된다.
Patent KR-20000004098-A (KR)
Title: Diaxial orientation polyester film for magnetic record medium
Inventor: AHN SEUNG TAE
IPC: G11B5/62
Filed: 1998-06-30
Abstract: PURPOSE: A polyester film for a magnetic record medium is provided to have excellent abrasion resistance and scratch resistance, a surface characteristic and a function matching with a film. CONSTITUTION: The polyester film comprises a polyester resin film and a polygon inorganic grain. The polygon inorganic grain has an average diameter of 0.005-2.5 micrometer and a temperature difference, where a bending strength is quickly varied, being 400-1000 degrees. The polygon inorganic grain is contained by 0.01-0.04 weight% in the polyester resin film, and its thermal expansion rate is 1.5 times 10¬-6/°C to 4 times 10¬-6/°C. Thereby, the polyester film has excellent abrasion resistance and scratch resistance, a surface characteristic and a function matching with a film, and is suitable to a film for a magnetic record medium.
Patent KR-20000008569-A (KR)
Title: Coating solution compound and coating compound containing it
Inventor: BAE BYEONG SU
IPC: C09D5/02
Filed: 1998-07-14
Abstract: PURPOSE: A composition comprising polyvinyl alcohol, silica compound, silane coupling agent, deforming agent, distilled water in the presence of acid catalyst is provided which has good oxygen blocking property, steam forming resistance,, transparency and antistatic property. CONSTITUTION: The composition comprises 1-20 weight% of polyvinyl alcohol, 0.01-12 weight% of silica compound, 0.01-5 weight% of silane coupling agent, 0.01-10 weight% of deforming agent, and 46-98.97 weight% of distilled water in the presence of acid catalyst selected from hydrochloric acid, sulfuric acid, nitric acid, and acetic acid. The silica compound is selected from tetraethoxysilane, tetramethoxysilane, tetrapropoxysilane, tetrabutoxysilane, glycidoxypropylpremethoxysilane, and methacrylicoxypropyltrimethoxysilane. The silane coupling agent is Qn-Si-Rm where n+m = 4; n,m = a natural number, not 0; R = an organic chain comprising C4-14 with aldehyde or acetal group; Q = hydrolyzable alkoxy. The coating product is obtained by coating the coating solution on polyolefin film with a thickness of 0.1-20 micro meter. The product is useful as a packaging material for foodstuffs and a coating material of packaging material for industrial.
Patent KR-20000009432-A (KR)
Title: Crook pipe type regulating pipe using shape measuring method
Inventor: KWAK TAE OK
IPC: B21D19/00
Filed: 1998-07-24
Abstract: PURPOSE: A crook pipe type regulating pipe using a shape measuring method is provided to secure the working safety, to improve the quality of welding and to promote productivity. CONSTITUTION: The crook pipe type regulating pipe using a shape measuring method comprises the steps of:measuring a central height difference with a B flange, standardizing a flange; measuring the amount of revolution of a volt hole by obtaining the gap from the upper and the lower ends of the A flange; measuring the amount of the left and the right revolution and the amount of the upper and the lower revolution of the B flange, standardizing the A flange; measuring a crossing length of la and lb by using a 90 and a 45 degees cross ruler.
Patent KR-19990014216-A (KR)
Title: 베니어 선반
IPC: B27L5/02
Filed: 1998-07-27
Abstract: 베니어 선반은, 절삭대(4)에 고정되며 회전하는 원목(1)을 절삭하기 위한 절삭기(2)와, 상기 절삭기(2)에 대해 상기 원목(1)의 회전방향의 상측에서 원목(1)의 외주면을 가압하는 위치에 배치된 로울러 바(3)를 구비한다.  로울러 바(3)는 그 직경이 30mm 이하이며, 그 외주면에는 로울러 바(3)의 외주면으로부터 돌출되지 않는 높이의 다수개의 凸부(5)가 형성되어 있다.  로울러 바(3)는 미끄럼 베어링(9)내에 지지되며, 구동원으로부터 회전력을 얻도록 되어 있다.  로울러 바(3)는 프레셔 바로서의 기능과 원목을 회전시키는 기능을 동시에 가지며, 절삭된 베니어 단판에는 선반에 의한 체크무늬 돌기가 생기지 않는다.
Patent KR-20000009753-A (KR)
Title: Method for manufacturing rim type phase shift mask
Inventor: CHOE SUNG WOON
IPC: H01L21/027
Filed: 1998-07-28
Abstract: PURPOSE: A fabrication method of rim type phase shift mask is provided to prevent a deviation of rim size by using single electron beam lithographic process. CONSTITUTION: The method comprises the steps of forming a light shading pattern(110) for exposing a first region(I) to be etching and a portion of a second region(II) to be exposing on a substrate(100); coating a photoresist layer(120) on the resultant structure; exposing the photoresist layer(120) formed between the light shading patterns(110); removing a portion of the photoresist layer(120) to expose the first region(I) of the substrate(100); etching the exposed first region(I); removing the light shading pattern(110) of the second region(II); and removing the remained light shading pattern and the photoresist layer formed on the second region.
Patent KR-20000013766-A (KR)
Title: Serial number allocation system of daisy-chained system and method thereof
Inventor: KIM SEONG KE
IPC: G06F13/00
Filed: 1998-08-13
Abstract: PURPOSE: A serial number allocation system of a daisy-chained system and method thereof are to provide an information for using as an application program, such as diagnosis process, isolation process, image management and so forth, by allocating automatically an independent serial number to each subsystem, when identical or similar systems are operated as one big system by the daisy chain method. CONSTITUTION: A serial number allocation system of a daisy-chained system comprises: system ID detector(110,210,310,410); input connectors(120,220,320,420); output connectors(130,230,330,430); a plurality of systems(100,200,300,400) formed with a number of signal lines related to ID for connecting between the input connector and the output connector; and cables.
Patent KR-19980087660-A (KR)
Title: 박형 부저와 그 제조방법
IPC: G10K9/12
Filed: 1998-09-07
Abstract: 본 발명은 부저어셈블리가 장착되는 하부케이스의 일단면 외측으로 연설된 외부접속단자에 그 부저어셈블리의 여자코일의 양측 단말이 결선되는 구조의 박형부저와 그 제조방법에 관한 것으로,  도전성 프레임부재(100)의 내측에서 분기적으로 연장되는 단자형성프레임(102)의 선단이 상기 여자코일(68)의 양측 단말(68a)에 대한 외부접속단자(82)로서 제공되도록 절곡가공되고, 그 프레임부재(100)를 근간으로 일단면(62a)에 상기 여자코일(68)의 양측 단말(68a)의 인출을 위한 코일인출구(84)가 형성됨과 더불어 상기 외부접속단자(82)가 그 일단면(62a)을 통해 돌설되도록 상기 하부케이스(62)가 성형되며, 그 하부케이스(62)에 상기 부저어셈블리(64)를 장착하고나서 상기 여자코일(68)의 양측 단말(68a)을 상기 코일인출구(84)를 통해 상기 외부접속단자(82)에 결선함으로써 상기 하부케이스(62)의 외측에서 상기 여자코일(68)의 양측 단말(68a)과 상기 외부접속단자(82)의 결선이 실행되도록 한 것이다.
Patent KR-20000019692-A (KR)
Title: Small-sized lens fixing method of non-contact type optical switch
Inventor: SHIN JAE HUN
IPC: G02B7/00
Filed: 1998-09-15
Abstract: PURPOSE: A small-sized lens fixing method of non-contact type optical switch tightly connects a small-sized lens to a lens insertion hole, and easily processes a fabrication of the lens insertion hole. CONSTITUTION: A small-sized lens fixing method makes a lens arrange part(10) which includes a lens fixing groove(11) for a groove(11'), and adhesive agent injection hole(12) being vertically formed to an upper part of a center part of the lens fixing groove. The lens(20) is inserted into the lens fixing groove(11), and injects the adhesive agent(30) into the lens fixing groove(11) through the adhesive agent injection hole(12). Thereby, the method makes it easy to insert the adhesive agent, a lens arrangement and lens attachment become easy, and a special equipment and process are not needed. Thus, a fabrication of optical switch and its maintenance are very convenient.
Patent KR-20000019947-A (KR)
Title: Semiconductor device comprising multi-layered line and method for fabricating the same
Inventor: KIM SUNG BONG
IPC: H01L21/60
Filed: 1998-09-16
Abstract: PURPOSE: A semiconductor provided with multi layered pads is provided to accomplish high accumulation by the capacity of reducing the pattern size toward the transverse direction of the semiconductor device, and to simplify its fabrication process. CONSTITUTION: In a semiconductor device, a first insulation film(106) is formed on a semiconductor substrate(100) comprising an active region(104). The first insulation film comprises a first and a second contact window formed by penetrating the first insulation film in order for a part of the surface of the active region to be revealed. A first and a second conductive plug(108a,108b) are formed in the first and the second contact window. A first conductive film pattern(110) and a second conductive film pattern(112) connected to the first conductive plug are formed to be separated each other. An etch-preventing film(114) and a second insulation film(116) are formed on the front of the resulted structure, wherein a third and a fourth contact window are formed by penetrating the second insulation film and the etch-preventing film. A third and fourth conductive plug(118a,118b) are formed in the third and the fourth contact window, and a third conductive film pattern(120) connected to the third conductive plug and a fourth conductive film pattern(122) connected to the fourth conductive plug are formed on the second insulation film.
Patent KR-19990071401-A (KR)
Title: 채널등화전 기저대 디지털텔레비젼신호 데시메이션하는 디지털텔레비젼신호 수신기
IPC: H04N7/015
Filed: 1998-09-26
Abstract: 본 발명은 수신할 디지털 텔레비젼(DTV)신호가 직교진폭변조(QAM)신호인지 잔류 측파대(VSB)신호인지의 여부와 무관하게 선택된 DTV신호를 수신하는데 동일한 튜너를 사용하는 무선수신기를 제공한다. 본 발명의 무선수신기에 있어서, 최종 IF신호는 기저대로 싱크로다이닝될 수 있도록 QAM, VSB신호들의 심볼주파수들 모두의 배수에 해당하는 속도로 디지털화된다. 상기 QAM, VSB 최종 IF신호들의 반송파주파수들은 디지털회로에서 발생된 자동 주파수 및 위상 제어(AFPC)신호를 튜너의 국부발진기에 인가함으로써 QAM 및 VSB신호들의 심볼주파수들 모두의 배수의 약수들이 되게 조절된다. 최종 IF신호들을 싱크로다이닝시켜 얻은 기저대 DTV신호들은 심볼동기를 쉽게 할 수 있도록 심볼속도보다 높은 샘플속도를 갖는다. 상기 기저대 DTV신호들은 채널등화필터에서 요구되는 승산기들의 갯수를 감소시킬 수 있도록 채널등화처리를 수행하기전에 심볼속도로 데시메이션처리된다.
Patent KR-20000027742-A (KR)
Title: Method for forming storage electrode of capacitor using phase shift mask
Inventor: OH SE YOUNG
IPC: H01L27/108
Filed: 1998-10-29
Abstract: PURPOSE: A method for forming storage electrode of capacitor using phase shift mask is provided to reduce process time and cost by simplifying the processes. CONSTITUTION: A method for forming storage electrode of capacitor using phase shift mask comprises: a step of presenting a semiconductor substrate(11); a step of forming a contact hole; a step of depositing a polysilicon film for a storage electrode; a step of coating a photoresist film; a step of forming a photoresist pattern; and a step of forming a storage electrode. An insulating film(12) is previously deposited on the substrate. The contact hole is formed in the insulating film by etching process using a phase shift mask. The pattern is formed by an etching process using the mask and a developing process.
Patent KR-19990044917-A (KR)
Title: 식품조리용 고온축열기
IPC: A47J27/00
Filed: 1998-10-29
Abstract: 본 발명은 식품조리용 고온축열기에 관한 것으로서, 본 발명은 각종 음식물을 가열하여 조리할 때 음식의 외부와 내부의 익는 정도가 다르므로 내부의 온도를 측정하여 음식의 가장 좋은 맛을 내는 온도를 유지시켜 조리가 가능하며, 특히 공간열을 이용하여 조리용기와 식품이 같은 열을 받아 눌거나 타지 않는 식품조리용 고온축열기를 얻기 위한 것인 바, 
     일측에 개방구가 있고 내부와 외부사이에 단열재가 개재된 이중의 철판으로 형성된 원통형의 본체부와; 상기 내부 철판면의 상부 좌·우측 및 하부에 장착된 전열판과; 상기 본체부의 일측 힌지에 의해 장착된 개폐구와 몸체부를 밀착시키는 잠금 손잡이와; 상기 본체를 지지하도록 본체의 하부에 높이 조절 가능하도록 장착된 지지대와; 상기 본체내부의 조리음식물의 온도를 측정하는 부착형 감지센서와, 설정한 온도에서 일정시간 작동되는 타임머와, 몸체부 내부의 온도측정센서와 전열판의 온도조절부로 구성되어 조리식품내의 온도설정 또는 조리온도 및 시간을 제어하는 제어부와; 일정한 압력으로 유지되도록 본체부의 상부 일측에 설치되어 일정한 압력하에서 배출되도록 장착한 자동증기배출밸브부와; 조리식품의 완료를 알리도록 장착한 부저를 구성함으로써, 익는 정도에 따라 맛의 차이를 달리할 수 있게 온도측정 감지대를 장착한 특징이 있다.
Patent KR-20000027798-A (KR)
Title: Method for manufacturing semiconductor memory devices
Inventor: KIM EUL RAK
IPC: H01L27/108
Filed: 1998-10-29
Abstract: PURPOSE: A semiconductor memory fabrication method is provided to prevent a short channel effect by minimizing N- formation due to out-diffusion of N- junction using a nitride layer as an etching stopper. CONSTITUTION: An isolation layer(1) and a gate electrode(3) is formed on a silicon substrate(2). A thermal oxide(5) is formed on the silicon substrate(2), the isolation layer(1) and side walls of the gate electrode(3). A nitride layer(7) is formed on entire surface of the resultant structure. Impurities are implanted to the surface of silicon substrate(2). A spacer oxide is deposited on the nitride layer(7), and a gate spacer(8) is formed by etching the spacer oxide using the nitride layer(7) as an etching stopper. Then, the nitride layer(7) is removed.
Patent KR-20000031211-A (KR)
Title: Semiconductor memory device for reducing chip area due to effective arrangement of banks
Inventor: LEE SEONG GEUN
IPC: H01L27/10
Filed: 1998-11-04
Abstract: PURPOSE: A semiconductor memory device is provided to reduce a chip area due to the effective alignment of banks. CONSTITUTION: A semiconductor memory device is composed of an A bank, a B bank, a C bank, a D bank, first to fourth data lines(DIO1,DIO2,DIO3,DIO4), first to third pads(PAD1,PAD2,PAD3), and first to third voltage power lines(PL1,PL2,PL3). The A bank is consisted of first and second memory cell arrays(201,202), and the B bank is consisted of third and fourth memory cell arrays(203,204). The C bank is consisted of fifth and sixth memory cell arrays(205,206), and the D bank is consisted of seventh and eighth memory cell arrays(207,208). Therefore, when the A bank or the B bank is selected in the semiconductor device having aligned banks, the first data line(DIO1) and the second data line(DIO2) are used. When the C bank or the D bank is selected, the third data line(DIO3) and the fourth data line(DIO4) are used. Therefore, the number of the data lines is reduced by half compared to an existing technique.
Patent KR-20000032146-A (KR)
Title: Method of controlling noise of air conditioner
Inventor: LIM WON KYEONG
IPC: F24F11/00
Filed: 1998-11-13
Abstract: PURPOSE: A noise controlling method for an air conditioner is provided to reduce the amount of venting airflow of an air conditioner according to the loudness of the noise measured in indoor and to prevent the problem in sleeping of a user due to the operation sound produced from an air conditioner. CONSTITUTION: A noise controlling method comprises the steps: reducing the RPM of a blower fan to a predetermined RPM to vent wind for sleep and measuring indoor noise via a noise system if a driving mode is converted to a sleeping mode; storing the measured value of the noise in a memory, reducing the RPM of the blower fan as much as the predetermined level and repeatedly measuring the indoor noise via the noise system; comparing the measured value of the noise to the noise value in the memory and repeating the function after renewing the data stored in the memory if the noise value is reduced; and fixing the RPM of the blower fan if the noise value is not changed.
Patent KR-20000028922-A (KR)
Title: Refrigerator
Inventor: JANG HYEON JAE
IPC: F25D21/14
Filed: 1998-11-28
Abstract: PURPOSE: A refrigerator able to improve the heat exchange efficiency by returning the cool air circulating a freezing chamber and a refrigeration chamber to the other parts of an evaporator. CONSTITUTION: A cool air generating in a heat exchange chamber having an evaporator is supplied to a freezing chamber(20) via a cool air vent hole by a blower fan. The cool air circulating the freezing chamber returns to the front face of the evaporator via a freezing chamber returning inlet formed on the bottom of a grill fan, and the cool air circulating a refrigeration chamber(50) returns to the rear face of the evaporator via a return channel(74) of a duct of a refrigeration chamber(62) and a return guide(72). Herein, the part contacting with the evaporator is maintained uniformly by contacting each air via the front and rear faces of the evaporator. Thereby the heat exchange efficiency is improved. And the flow of air passing through the evaporator becomes uniform according to the unified amount of frost generating on the evaporator.
Patent KR-20000034631-A (KR)
Title: Store security device using electronic cash register
Inventor: KIM HO JIN
IPC: G07G1/12
Filed: 1998-11-30
Abstract: PURPOSE: A security device using electronic cash register is provided to maximize security of a store with low cost by enabling an ECR(Electronic Cash Register) to notify a security service company inputted previously when it senses illegal opening of valuables storage or place which can be invading route of a store. CONSTITUTION: In an ECR which executes information management about sale, a store security device using electronic cash register includes an opening sensing senor(31,32,33) which is installed in an invading gateway of a store or a valuables storage and senses illegal opening; a memory(50) which stores a phone number of a report place; a communication executing part(60) which calls the phone number of the report place stored in the memory(50); and a central managing part(10) which determines an opening based on a sense signal from the opening sensing sensor(31,32,33) and drives the communication executing part(60) in case it is determined there is an opening.
Patent KR-20000034633-A (KR)
Title: Steel cord for reinforcing rubber product
Inventor: BAE DAL HYANG
IPC: D07B1/12
Filed: 1998-11-30
Abstract: PURPOSE: A steel cord is provided to improve osmosis of rubber by widening an interval between side filaments by connecting a side line after giving a spiral change into an entire core cord and to be easily processed by reducing a generation of disconnection in a connecting process. CONSTITUTION: After forming a core cord by twisting 2-3 filaments generally used for a steel cord, a spiral change is given into a surface of core by passing a roller of saw tooth to give a regular changed rate into the core cord. An interval between filament of each side is uniformly generated within 0.1-2.0mm by connecting 4-10 side filaments thereon. A changed pitch(P2) of core cord passed the roller of saw tooth is 0.5-2.5times of the pitch(P1) of core cord and a changed diameter of core cord(D2) is 1.1-5.0times of a cord diameter of core cord. The changed pitch and the changed diameter of core cord are controlled by changing a pitch of saw tooth roller and a depth of groove.
Patent KR-20000038397-A (KR)
Title: Method for cooling casting piece of stainless alloy in nonmagnetic austenite group
Inventor: KIM SEON GU
IPC: B22D11/22
Filed: 1998-12-07
Abstract: PURPOSE: A method for cooling the casting piece of stainless alloy in a nonmagnetic austenite group is provided to produce a casting piece in a continuous casting method for preventing cracks or defect generated while hot rolling while producing the stainless alloy in the continuous casting method. CONSTITUTION: A cooling speed of the area containing a liquid phase and a solid phase of austenite stainless alloy casting piece is controlled for 10-3000°C/min while controlling the cooling speed of the area from the solid phase to 700°C for under 150°C/min. Moreover, the solidification process or the segregation movement of austenite stainless steel is seized for preventing crack on the surface of the casting piece and the crack in a hot rolling. An austenite group phase(2) is generated at a liquid phase temperature(1) for being grown according the lowering of the temperature. Thus, the austenite group phase is collided with solidification structure. Then, solute elements such as Cr, Ni, Mn, Si, P, and S, which are discharged to liquid phase, are locked in a weak phase(3) remained in an inter-dendrite. The solidification is progressed for accumulating the solute elements. Then, the austenite phase becomes coarse by passing through a coarsening process. If the cooling speed from the liquid phase temperature to the solid phase temperature is lowered, the generation of solidification crack is prevented.
Patent KR-20000038684-A (KR)
Title: Volume control circuit for group video conference system
Inventor: CHOI SANG JOON
IPC: H04N7/15
Filed: 1998-12-08
Abstract: PURPOSE: A volume control circuit for group video conference system is provided to enable a user at the far-end to control the volume of participants by using a camera control signal. CONSTITUTION: A volume control circuit for group video conference system includes a beam former(221), a variation detector(222), a location information analyzer(223), a volume controller(224), and a sound transmitter/receiver(226). The beam former(221) receives outer sound signal and outputs voice of the required speaker selectively. The variation detector(222) detects the variation on the camera location and zoom parameters. The location information analyzer(223) receives the output signal from the variation detector(222) and detects the current location of the speaker. The volume controller(224) amplifies or reduces the output signal from the beam former by using a multiplier(225). The sound transmitter/receiver(226) transmits/receives the output signal from the multiplier(225) to/from a far-end terminal.
Patent KR-19990063085-A (KR)
Title: 압축기의 오일 회수구조
IPC: F04B39/04
Filed: 1998-12-16
Abstract: 본 발명은 토출구의 위치가 변경되었어도 윤활유를 회수하기 위한 주요한 구조의 위치를 변경할 필요가 없는 압축기의 오일 회수구조를 제공하는 것으로서, 그 수단으로서는, 머플러실(43)은, 실린더 블록(12)의 외곽부의 머플러 형성부(41)와 머플러 커버(42)에 걸쳐 형성되어 있다. 가스켓(44)은 머플러실(43)을 제 1 및 제 2머플러실(43A, 43B)로 둘로 분할된다. 토출통로(47)는 토출실(28)과 제 1머플러실(43A)을 접속한다. 접속구멍(46a)은 양 머플러실(43A, 43B)을 접속한다. 토출구(48)는 머플러 커버(42)에 설치되어 있다. 원심분리기(49, 51)는, 제 1머플러실(43A)에 있어서 접속구멍(46a)에 대응하여 설치되어 있다. 회수통로(52)는 제 1머플러실(43A)과 크랭크실(15)을 접속하며, 제 1머플러실(43A)에 대하여서는 선회실 (49)에서 개구되어 있다.
Patent KR-20000042410-A (KR)
Title: Method for manufacturing stack-gate-shaped flash memory device
Inventor: KIM TAE HAN
IPC: H01L27/115
Filed: 1998-12-24
Abstract: PURPOSE: A method for manufacturing a stack-gate-shaped flash memory device is provided to prevent a duplicate gate profile caused by a deep step difference, damage to a reflection blocking layer, a generation of residue in a tunnel insulation layer in the peripheral circuit area, by forming a filed oxidation layer, by forming a polysilicon layer for a floating gate thicker than a step of the filed oxidation layer, and by planarizing the field oxidation layer by a chemical mechanical polishing process. CONSTITUTION: A method for manufacturing a stack-gate-shaped flash memory device comprises the steps of: forming a field oxidation layer on a semiconductor substrate; forming a polysilicon layer for a floating gate on the entire structure having the field oxidation layer; and planarizing the polysilicon layer by a chemical mechanical polishing process while using the field oxidation layer as a polishing blocking layer.
Patent KR-20000043831-A (KR)
Title: Overvoltage clamping circuit
Inventor: KIM TAE HYUNG
IPC: H02H3/08
Filed: 1998-12-29
Abstract: PURPOSE: An overvoltage clamping circuit is provided to protect internal circuits from an overvoltage and shorten an RC charging/discharging time by lowering a voltage applied to an optical interface node below a certain level. CONSTITUTION: A cathode of a light emitting diode(D0) is connected to a resistor(R0). An anode of a light receiving diode(D1) is connected to a node A. A resistor(R1) is connected to the node A and to the gate and drain of a first NMOS transistor(N20). The resistor(R1) is connected to the non-converting terminal of a first comparator(CP20) and to the drain of a second NMOS transistor(N21). A reference voltage(Vref) is applied to the inverting terminal of the first comparator(CP20) and the output terminal of the first comparator(CP20) is connected to the second comparator(CP21) to which a clamping voltage is applied.