baber/WOPTO huggingface dataset:
Patent KR-20000044370-A (KR)
Title: Method for automatically locking keypad in cellular phone
Inventor: LEE SEUNG GU
IPC: H04B1/38
Filed: 1998-12-30
Abstract: PURPOSE: A method for automatically locking a keypad in a cellular phone, is provided to automatically lock a keypad without compressing a keypad lock key, and automatically lock a keypad again after a lease of a keypad lock function or after a speech completion. CONSTITUTION: A method for automatically locking a keypad in a cellular phone, comprises the steps of: setting an automatic lock time for performing an automatic lock function; deciding a passage of time as much as the set automatic lock time after the speech, when a predetermined speech is ended; and performing a function automatically locking a keypad, in a decision that time passed as much as the set automatic lock time after the ending of the speech.
Patent KR-19990063710-A (KR)
Title: 방향족 디올 단위를 포함하는 열가소성 폴리우레탄
IPC: C08G18/32
Filed: 1996-09-05
Abstract: 본 발명은  50℃ 이상의 T g 를 갖고 경질 열가소성 폴리우레탄을 용융 처리할 수 있는 온도로 낮추기에 충분한 농도의 방향족 디올 단위를 갖는 경질 열가소성 폴리우레탄에 관한 것이다.  본 발명은 또한 690,000 kPa(100,000 psi)의 유연 계수를 갖고 열가소성 폴리우레탄을 용융 처리할 수 있는 온도로 낮추기에 충분한 농도의 방향족 디올 단위를 갖는 열가소성 폴리우레탄에 관한 것이다.  본 발명의 조성물은 물리적인 특성을 거의 손상시키지 않으면서 개선된 가공성을 나타낸다.
Patent KR-19990067339-A (KR)
Title: 고분자분산형 액정표시소자와 그 제조방법
IPC: G02F1/1334
Filed: 1997-09-16
Abstract: 각기 내측면에 전극을 구비한 1쌍의 기판 사이에, 액정적(液晶滴)이 고분자화합물내에 분산 유지되어 이루어지는 액정표시소자에 있어서, 상기 액정적이 대략 동일한 형상과 크기를 가지며, 또 입경(粒徑)의 불균일을 작게 함으로써 넓은 온도범위내에서 상기 액정적의 배향(配向)형태가 바이폴라형으로 안정, 유지되도록 하여, 상기 전극간에 인가된 전압에 대한 광 투과율의 히스테리시스를 작게 할 수 있다. 
     또, 동일한 효과는 액정 고분자전구체 상용액에 계면 규제력의 제어제(制御劑)를 첨가하거나, 자외선의 조사(照射)에 의한 고분자의 중합 및 고분자와 액정과의 상분리(相分離)를 시킬 때의 온도를 높게 하거나 함으로써, 상기 액정적과 고분자와의 계면 부근의 액정분자의 틸트각을 작게 하거나, 또는 앵커링강도를 크게 함으로써 얻을 수 있다. 
     또한, 동일한 효과는 정전용량의 히스테리시스를 작게 억제하거나, 또는 전압 - 투과율 특성에 있어서의 투과율 10% 이상을 부여하는 전압에 있어서의 상기 정전용량 비율이 60% 이상이 되도록 함으로써 얻을 수 있다. 
     또, 액정재료의 표면장력을 절연막의 임계표면장력 또는 고분자화합물의 표면장력보다 작게 함으로써, 넓은 사용온도범위내에서 전계응답성을 향상시킬 수 있다. 
     그러므로, 넓은 사용온도 범위내에서 동화(動畵) 등을 표시할 수 있는 텔레비전이나 퍼스널 컴퓨터 등의 표시장치를 구성할 수 있다.
Patent KR-19990071494-A (KR)
Title: 위치 서보 시스템과 관련한 개량
Filed: 1995-11-20
Abstract: 가변-비율-유성기어 타입의, 특히 토로이달-레이스 롤링-트래크션 타입의, 동력-구동 무단변속기("CVT")가 휘일 또는 다른 회전작동부재와 그리고 스티어링 또는 다른 종동매커니즘과 동심 축상에 배치되고, 그리고 작동부재와 조향 매커니즘 의 위치들 사이의 오차에 대응하여 조향력을 증가하도록 출력하는 동력-원조 조향 시스템에 의하여 예시되는 위치 서보 시스템이다. 만일 무단변속기가 회전을 정지하는 경우 및 때때로 작동의 정규 센스가 역전되고 조향 매커니즘이 작동부재를 조향하려고 하는 때에, 작동부재와 조향 매커니즘 사이의 정규 수동 연결과의 방해를 방지하기 위한 수단들이 개시된다.  또한, 무단변속기가 토로이달-레이스 타입의 경우에, 무단변속기와 조향 매커니즘의 모든 연결부에 의하여 조향 매커니즘 상에서 발휘되는 힘들 사이에 균등성을 확보하기 위한 수단이 개시된다.
Patent KR-19990082544-A (KR)
Title: 트윈매스 플라이휠
IPC: F16F15/131
Filed: 1997-02-10
Abstract: 본 발명은 상대회전이 제한되게 착설된 동축상 배열의 제 1 및 제 2 플라이휠 동체(211)(212)로 구성되는 트윈매스 플라이휠(210)에 관한 것이다. 플라이휠 동체(211, 212)는 적어도 하나의 연결장치(240)로 연결되고, 주연방향으로 인접한 쌍이 주연방향으로 연장된 연결구를 통하여 연결되게 제 2 플라이휠 동체 상에 회전가능하게 착설된 둘 이상의 주연방향으로 간격을 둔 메인링크(242, 251)를 갖는 멀티-링크 연결구(240)와, 멀티-링크 연결구(240)를 제 1 플라이휠 동체에 연결하는 앵커링크(242)로 구성된다. 플라이휠 동체(211, 212)의 상대회전으로 멀티-링크 연결구(240)는 앵커링크에 의하여 제 2 플라이휠 동체에 대하여 회전되어 트윈매스 플라이휠이 회전될 때 플라이휠 동체(211, 212)의 상대회전이 연결장치에 작용하는 구심력에 의하여 저지된다. 특정한 링크가 단일 링크의 형태 또는 한 쌍의 평행한 판의 형태일 수 있다. 하나 이상의 링크와 관련하여 플라이휠 동체(211, 212) 사이에서 회전 또는 작용하는 제어수단이 플라이휠 동체(211, 212)의 상대회전을 제어토록 제공된다.
Patent KR-19990082594-A (KR)
Title: 전지용 안전 밸브 소자 및 안전 밸브가 부착된 전지 케이스 캡
IPC: H01M2/10
Filed: 1997-02-14
Abstract: 전지의 내부 압력을 방출하기 위해서,  규정된 압력,  특히 낮은 압력에서 전지용 안전 밸브 소자는  안전하고 정확하게 폭발할 수 있고  용이하게 제조될 수 있다.     그러한 안전 밸브 소자가 합체된 전지가  또한 개시되어 있다.     안전 밸브 소자는  관통 개공 (C) 을 갖는 금속 기판 (A) 과 개공 (C) 을 폐쇄하기 위해 기판 (A) 상에 제공된 금속 호일 (B) 을 포함한다.     안전 밸브 소자가 제공된 전지가  또한 개시되어 있다.     전지와 전지 케이스 캡이  금속 기판 (A) 에 관통 개공 (C) 을 형성하고,  금속 호일 (B) 을 금속 기판 (A) 에 압력 용접하고 나서 클래딩 재료를 전지 케이스 캡의 형태로 몰딩하여 제조된다.     그러한 케이스 캡을 사용하는 전지가  또한 개시되어 있다.
Patent KR-20000015940-A (KR)
Title: Substrate for semiconductor device, lead frame, semiconductor device and method for manufacturing the same, circuit board, and electronic equipment
Inventor: NAKAMICHI TADAHIRO
IPC: H01L23/495
Filed: 1998-03-24
Abstract: PURPOSE: A semiconductor device is provided to prevent the defective bonding of wires by making bonded wires easily optically recognizable. CONSTITUTION: The semiconductor device comprises a semiconductor chip (20) having a plurality of electrodes and leads (16) containing inner lead sections (16a) which are connected to the electrodes through wires (24) and outer lead sections (16b) which function as external terminals, wherein, in each inner lead section (16a), a groove (18) is formed as a central displaying section at the center of its bonding area for the wire (24) in the widthwise direction.
Patent KR-20000015959-A (KR)
Title: Process of purification of cyclosporin
Inventor: KERI VILMOS
IPC: A61P29/00
Filed: 1998-03-23
Abstract: PURPOSE: An application of multi-stepped chromatography as a column being filled with silica gel phase and a chromatographic preparing method for a cyclosporin A by a solvent mixture containing toluene as a major component are provided. CONSTITUTION: Object of the invention is a process for the chromatographic preparation of cyclosporin A from a crude product containing cyclosporin complex by using a column filled with silica gel and by the application of multistep chromatography with a column filled with normal phase silica gel and by a solvent mixture containing toluene as the major component.
Patent KR-20000022105-A (KR)
Title: System for fastening sheet materials together
Inventor: CAMPBELL MICHAEL T
IPC: B62D25/14
Filed: 1997-07-25
Abstract: PURPOSE: A system is provided to fasten two respectively formed mats of noise shielding assembly on barrier wall for separating engine compartment and passenger compartment of motor vehicles. CONSTITUTION: A barrier wall having acoustical barrier assembly(102) including two appositionally overlapped mats(104,106) separates an engine compartment and a passenger compartment. Each mat portion consisting of formed structure has a noise damping characteristic. Each mat has an edge. The edge of the second mat meets with one of the surface of the first mat to seal two mats. The spacer ribs(124,132) get into one structure with the two mats. Each rib is extended to another mat. Although the spacer ribs are close to mat, there are clearances between mats and spacer ribs.
Patent KR-19990067854-A (KR)
Title: 유아용 시트
IPC: B60N2/28
Filed: 1999-01-12
Abstract: 시트플레이트의 높이 조정에 따라서 어깨벨트사이의 거리가 조정되는 유아용 시트를 제공한다. 
     시트백(12)이 부착된 시트보디(16)에 대해서 전방시트플레이트(22)및 후방 시트플레이트(24)로 이루어진 시트플레이트(20)가 상하이동 가능하게 지지되어 있다. 
     시트플레이트(20)는 전방링크(38)및 후방링크(40)에 의해 지지되어 있다. 
     시트플레이트(20)를 상하 이동시키면 연동부재(120)가 상하이동하고, 그 연동부재(120)의 긴구멍(122),(124)에 걸어 맞춘 어깨벨트가이드부재(130),(140)가 접근 분리하는 방향으로 슬라이드하고, 어깨벨트(92)사이의 거리가 조정된다.
Patent KR-20000056175-A (KR)
Inventor: PARK SHIN SUNG
IPC: G07G1/12
Filed: 1999-02-13
Abstract: PURPOSE: A method for managing a kitchen printer of an electronic cash register(ECR) is provided to divide input order data items into data items to be transmitted to the kitchen printer immediately and data items held and, when required, transmitted to the kitchen printer. CONSTITUTION: In a method for managing a kitchen printer of an ECR, order data and whether the order data is held before transmitted to a kitchen printer or immediately transmitted to the kitchen printer are inputted to be recorded in a corresponding memory region(S12). The order data is confirmed whether to be transmitted immediately or held before transmitted to the kitchen printer(S16), and the order data required to be immediately transmitted is sent to the kitchen printer(S18). The order data held is converted into order data required to be immediately transmitted and the converted order data is delivered to the kitchen printer(S26).
Patent KR-20000056506-A (KR)
Inventor: KO DONG HWAN
IPC: H01L21/306
Filed: 1999-02-23
Abstract: PURPOSE: Gate polysilicone etching method of semiconductor device provides easy and simply perform, to not excess etching on a circuit having a broad line width by etching, without producing μloading efficiency and demolition of oxide film; CONSTITUTION: Gate polysilicone etching method of semiconductor device comprising; a oxide film(4) formed on a substrate(2), a polysilicone layer(6) vapor deposited grown on the oxide film(4), a silicone nitride layer(8) is vapor deposit and photoresist(10) is applied on the upper of the polysilicone layer(6), the silicone nitride layer(8) is patterning from exposure etching by photo lithography process. remove the photoresist(10) then the silicone nitride layer(8) is to be a hard mask. the polysilicone layer(6) is etched by a dry etching in this state with cl2/SF6/N2 gas injection. in this time cl2 gas 80-140sccm, SF6 gas is 5-15 sccm, N2 gas is 2-10 sccm ratio and the pressure in the reaction chamber is 2-10mT, cathode power is 50-150W, anode power is 500-1000W, temperature is 40-65°C, in the 15-25 sec of period.
Patent KR-20000056578-A (KR)
Inventor: KIM YONG TAEK
IPC: F24F1/00
Filed: 1999-02-24
Abstract: PURPOSE: An air conditioner is provided to perform cooling or heating operation and air cleaning operation via separate channels so that either one channel is selectively used for reducing power consumption, and increase the air cleaning efficiency by constituting a separate channel. CONSTITUTION: An air conditioner includes a cabinet(51) formed with a suction hole(51a) and a discharge hole(51b) on an outer surface for cooling or heating and provided with a heat exchanger(54) and a blower(53) on a cooling and heating channel(A) between the suction and discharge holes, an air conditioning chamber(C) formed with additional suction and discharge holes(51c,51d) at one side of the cabinet for cleaning room air and provided with an air cleaning element(56) on an air cleaning channel(B) between the suction and discharge holes, and a channel separating element for defining the cooling and heating channels from the air cleaning channel.
Patent KR-20000060629-A (KR)
Inventor: JUNG UNG JAE
IPC: G01B9/04
Filed: 1999-03-18
Abstract: PURPOSE: A method for measuring a slope of a semiconductor wafer pattern is provided to measure a line pattern, a space pattern and a via pattern by a simple formula and monitor a slope of a currently measured pattern from a display so that the checking of the slope is convenient and accordingly a real time measure becomes possible to take. CONSTITUTION: A method for measuring a slope of a semiconductor wafer pattern formed by a photomasking process with relation to a photoresist doped on a semiconductor wafer(15) includes the steps of obtaining a thickness of a pattern formed on the semiconductor wafer, measuring a width(w) of the pattern(17) and a width(t) of a tapered upper part(18) of the pattern with an electronic microscope, and computing a slope(theta) of the pattern by a formula: theta=arctan{((b/absolute value of (t-w))/2)/(pi/180)}, wherein the pattern is a line pattern having an upper part of which a slope becomes decreased as tapered, and the slope of the line pattern is an average value of slopes of both side parts.
Patent KR-20000074376-A (KR)
Inventor: KIM JAE SEUNG
IPC: G07F17/26
Filed: 1999-05-20
Abstract: PURPOSE: A vending machine for a sticker and a caricature printed matter are provided to automatically output the sticker and the caricature of a user on an A4-sized paper sheet and automatically sell a printed matter. CONSTITUTION: The vending machine for a sticker and a caricature printed matter comprises a main body, a note recognition unit(122) mounted in the body, a camera(130) connected to the body to input a necessary image data, a monitor for displaying a desired selected image, an input unit(140) for selecting and editing the image data and selecting a necessary process, a storing unit(150) for storing an operating program and a caricature processing program, a caricature printer(160) for printing an image data input through the camera and treated through the caricature processing program as a caricature printed matter, a sticker printer(162) for printing the image data input through the camera on a sticker paper sheet, and a controlling unit(170) for controlling each unit. In the machine, a plurality of lighting units are mounted in the body. An external monitor(172) is further provided in the body.
Patent KR-20000052286-A (KR)
Inventor: BAEK YEONG JUN
IPC: H01J9/02
Filed: 1999-05-25
Abstract: PURPOSE: An improved diamond tip for a cold-electron field emission device and a fabricating method thereof are provided to improve characteristics of the field emission device, to enable various formations of the device, and further to simplify a fabrication process. CONSTITUTION: A diamond layer(2) is deposited on a substrate(1) made of various materials such as silicon, glass, ceramic, or metal. Next, a mask layer(3) such as oxide or nitride is deposited on the diamond layer(2), and then patterned to partly expose the underlying diamond layer(2). Next, a dry etch process is performed so that the exposed diamond layer(2) is etched. In particular, etched portions of the diamond layer(2) is tapered down because of sputter and facet of the mask layer(3), and consequently a plurality of conical diamond tips are formed on the substrate(1). The dry etch process preferably employs a reactive plasma etch using a radio-frequency plasma, microwave plasma, or electro-cyclotron resonance plasma, or reactive ion-beam etch. Besides, an additional etch process using hydrogen plasma may be further performed after the formation of the conical diamond tips.
Patent KR-20010001742-A (KR)
Inventor: LEE HYEON BOK
IPC: H04B1/40
Filed: 1999-06-08
Abstract: PURPOSE: A device for controlling output power for enhancing battery efficiency of a wireless telephone set is provided to measure the intensity of receiving power generated according to distances of a portable devise and a fixed device, and to compare the measured intensity with a reference value calculated by the measured value and a predetermined distance, thereby reducing the transmitting power if the measured value is bigger than the reference value by being considered as the devices are close and increase the transmitting power if the measured value is smaller than the reference value by being considered as the devices are distant. CONSTITUTION: If a telephone call is received, a portable device transceives a radio frequency(RF) signal with a fixed device. A DX sensor senses the intensity of receiving power, and output a sensed value to a comparator as a voltage value. The DX sensor decides whether the outputted voltage value is bigger than a reference voltage value of a reference voltage storage unit. If the voltage value outputted in the DX sensor is bigger than the reference voltage value, a controller turns on a transistor to reduce a bias voltage provided to a transmitting amplifier. If the voltage value outputted in the DX sensor is smaller than the reference voltage value, the controller turns on the transistor to increase the bias voltage provided to the transmitting amplifier.
Patent KR-20010002055-A (KR)
Inventor: KANG HYO DONG
IPC: H04R1/10
Filed: 1999-06-10
Abstract: PURPOSE: A transmitting and receiving earphone including an ear hanger type wired drum is provided to form a transmitting microphone and a receiving speaker with one body. CONSTITUTION: A transmitting and receiving earphone including an ear hanger type wired drum comprises the following structure. A wired roll is prepared to arrange a code in an inner portion of an ear hanger(1) and an extended case(2). A speaker(5) and a microphone(6) are mounted therein. The transmitting and receiving earphone further comprises an ear hanger type wired drum(2) including the ear hanger(1) and an extended code arranging device(3). The ear hanger type wired drum(2) further comprises the speaker(5). The ear hanger type wired drum(2) further comprises a microphone. The speaker(5) and the microphone(6) are mounted within the wired drum(2).
Patent KR-20010005192-A (KR)
Inventor: CHO JIN U
IPC: H01J11/36
Filed: 1999-06-30
Abstract: PURPOSE: A method for fabricating a diaphram of a plasma display panel is provided to fabricate precisely the diaphram of the plasma display panel on lower expenses. CONSTITUTION: A method for fabricating a diaphram of a plasma display panel applies X-rays to a sensitive film(20) through a mask to expose to the light, develops the sensitive film to form the sensitive film structure, forms a metal structure on top of the first substrate(10) which the sensitive film structure is formed by the electron plating, and forms the diaphram structure on the second substrate by pressing on top of the second substrate with the metal substrate.
Patent KR-19990068847-A (KR)
Title: 정수기
Filed: 1999-06-30
Abstract: 본 발명은 상온수를 별도의 가압수단없이 대기압차에 의해 여과처리하면서 열전소자(24)의 펠티에효과를 통해 음용하기 좋은 냉각수상태로 냉각처리하여 건강에 좋은 냉각수로 음용할 수 있도록 하는 정수기에 관한 것으로, 물보충마개(41)를 열고 임의로 상온수를 보충시킬 수 있으면서 장입구(45)로 장입되는 상온수가 필터(42)에 의해 대기압차로 정수되는 상온저수통(40)과 함께; 지지격벽(13)을 사이로 위쪽의 냉각수저장조(12) 저부에는 냉각봉(20)이 설치돌출되면서 상측의 상온수주입구(11)를 통해 낙하저장되어 상기 냉각봉(20)에 의해 열교환되는 상온수상태를 감지할 수 있는 감지센서(36)가 설치부착되며, 아울러 상기 지지격벽(13) 아래쪽의 방열장치조(14)에는 상기 냉각봉(20)과 연결통전되는 열전소자(24)와 함께 상기 열전소자(24)를 통해 흡수되는 상온수의 열을 방열시키는 방열판(25)이 연결조립되는 한편, 방열공(18)이 다수 관통된 상기 방열장치조(14) 저부와 상기 방열판(25) 저부 사이에 송풍팬(28)이 설치조립되고, 아울러 상기 방열기장치(14) 내측 한쪽에는 상기 열전소자(24)와 상기 송풍팬(28) 및 상기 감지센서(36)가 연결통전되면서 외부설치된 표시부(30)로 상온수의 측정상태가 선택표시되도록 하는 콘트롤러(35)가 설치고정된 냉각저수통(10) 및; 상기 냉각저수통(10) 저부에 조립고정되어 지지되는 받침대(19)를 포함하여 이루어진 것을 특징으로 한다.
Patent KR-20010008970-A (KR)
Inventor: YOON CHEOL HWAN
IPC: H03L7/00
Filed: 1999-07-06
Abstract: PURPOSE: A voltage controlling oscillator in a phase lock loop module is provided to improve movements of an oscillator, which carries out the early oscillating movements of the voltage control oscillator by using a phase lock loop module. CONSTITUTION: A voltage controlling oscillator in a phase lock loop module includes a reference frequency oscillator(31a), a negative feedback resistance portion(33), an amplifying portion(32) and a matching filter portion(34). The reference frequency oscillator(31a) is composed of the first coil inputting the control voltage generated in PLL, a varactor diode, the cathode terminal of which is connected with the other end of the first coil and the anode terminal of which is connected with the grounding, the second and third condenser parallel connected with the varactor diode, the first variable coil connected between the connecting point of the second and third condenser and the grounding, the fourth condenser connected with the connecting point of the second and third condenser, the voltage dividing resistance dividing and outputting the system control signal, a diode inputting the divided voltage to the anode terminal, the second variable coil connected with the cathode terminal of the diode and grounding and a condenser connected with the anode terminal of the diode and connecting point of the second and third condenser.
Patent KR-20010009566-A (KR)
Inventor: LEE DONG HUN
IPC: H05G1/08
Filed: 1999-07-12
Abstract: PURPOSE: A static electricity removing apparatus is provided to prevent a fracture of semiconductors, a fire or an explosion caused by static electricity or electrification of static electricity by removing static electricity from electrified powder. CONSTITUTION: A static electricity removing apparatus comprises a head unit(100) for generating a soft X ray, a soft X ray protecting unit(200) for wrapping the head unit(100) to prevent the X ray from leaking from the head unit(100), and a power control unit(300). The power control unit(300) is electrically connected to the head unit(100) and the soft X ray protecting unit(200) to suitably control the generation of the soft X ray from the head unit(100). The X ray protecting unit(200) is made of a steel plate with a thickness of 1mm. An interlock switch(220) controls the power control unit(200), and a door(210) controls the interlock switch(220) on/off. If the door(200) is open, the head unit(100) does not generate the X ray.
Patent KR-19990078630-A (KR)
Title: 커넥터
IPC: H01R13/62
Filed: 1999-07-14
Abstract: 본 발명은 블록에 삽입된 단자핀이 보다 견고하게 고정되도록 함과 더불어 접속시에도 소켓의 형상이 변형되지 않도록 된 커넥터에 관한 것이다. 
     본 발명에 따르면, 일단의 기저부(11)는 외부로 돌출되고 타단의 접속부(13)는 접속홀(27) 내측으로 돌출된 다수개의 단자핀(10)이 소정의 하우징(20)에 삽입 고정된 소켓(1)과, 일단의 기저부(31)는 외부로 돌출되고 타단의 접속부(33)는 커넥팅부(37) 외측으로 돌출된 다수개의 단자핀(30)이 소정의 하우징(40)에 삽입 고정된 플러그(3)로 이루어진 커넥터에 있어서, 상기 접속부(13)(33)와 평행하게 기저부(11)(31)로부터 연장되고, 일측에는 하우징(20)(40)의 내부에 걸려져 고정되는 소정의 걸림턱(19)(39)이 마련된 보강부(18)(38)가 더 형성된 것을 특징으로 하는 커넥터가 제공된다.
Patent KR-20010011001-A (KR)
Inventor: KIM CHUNG BAE
IPC: H01L21/76
Filed: 1999-07-24
Abstract: PURPOSE: A method for forming a trench of a semiconductor device is to provide high integration of the semiconductor device and to reduce a defect after an etching process to improve a process margin and an electric characteristic of the device. CONSTITUTION: A forming method of a trench comprises the steps of: forming the first insulating layer on a semiconductor substrate(11) and forming a photoresist pattern for exposing a portion to be an isolation region, on the first insulating layer; etching the first insulating layer using the photoresist pattern as an etching mask as to pattern the etching face slantly; forming the second insulating layer on the resultant structure after removing the photoresist pattern; etching the second insulating layer to form a spacer thereof on a sidewall of the first insulating layer; etching the substrate to form a trench as to form an etching face thereof slantly corresponding to the spacer profile; removing the spacer to round an upper corner of the trench; and oxidizing the surface of the trench.
Patent KR-20010011984-A (KR)
Inventor: KIM JEONG DAE
IPC: H04B1/40
Filed: 1999-07-31
Abstract: PURPOSE: A circuit for simultaneously performing a dual mode is provided to use dual earphones to simultaneously perform a cellular phone function and additional functions of a composite apparatus, so that a user can make a call without suspending a corresponding function as watching TV or listening to music or the radio. CONSTITUTION: A mobile station modem(MSN)(120) generates each mode selection switching signal for respectively connecting two ear-speakers of dual earphones with a functional part or an audio output circuit of a phone part(100), according to a driving performance mode. The MSN(120) generates each switching control signal for controlling the functional part and the audio output circuit to be switched in the ear-speakers or an external switch, depending on whether the dual earphones are connected. Mode selection switches(T1,T2) perform selective switching processes to connect each of the ear-speakers with the functional part or the audio output circuit, on the basis of the mode selection control signals of the MSN(120), and connect an audio pass. An ear-jack circuit(220) switches the mode selection switches(T1,T2) to be connected with the two ear-speakers, on the basis of the switching control signals in a state of the dual earphones being connected, and switches the mode selection switches(T1,T2) to be connected with the external speaker, on the basis of the switching control signals in a state of the dual earphones being not connected.