baber/WOPTO huggingface dataset:
Patent KR-20000010048-A (KR)
Title: Driving method of plasma display panel using high frequency wave
Inventor: YOU EUN HO
IPC: G09G3/2807
Filed: 1998-07-29
Abstract: PURPOSE: A plasma display panel is provided to enhance radiation efficiency using high frequency radiation. CONSTITUTION: The plasma display panel includes an address electrode and a discharge cell formed at a cross position of a first and a second sustain electrodes, wherein the first sustain electrode is opposite to the second sustain electrode. Writing discharges are sequentially created with a row line unit according to a data pulse. In the writing discharge, high frequency discharge is simultaneously created by a high frequency pulse to be maintained successively, and then is erased.
Patent KR-20000013606-A (KR)
Title: Target of critical dimension and measuring method thereof
Inventor: KIM HONG RAE
IPC: H01L21/66
Filed: 1998-08-11
Abstract: PURPOSE: A critical dimension target is provided to measure a critical dimension of a pattern formed during a semiconductor fabricating process utilizing an overlay apparatus. CONSTITUTION: The critical dimension target comprises an inner target and an outer target. A central line(C1) of both inner lines(L2, L7) of the outer target is identical to a central line(C2) of one side inner line(L4) and the other side outer line(L6) of the inner target. If overlay values(O(C1), O(C2)) of the central lines(C1, C2) are calculated, a pattern size of a present step is identical to that of a target step.
Patent KR-19990023705-A (KR)
Title: 심부전증 치료용 약학 조성물
IPC: A61P9/00
Filed: 1998-08-19
Abstract: 본 발명은 도페틸리드(dofetilide) 또는 그의 약학적으로 허용가능한 염의 치료 효과량을 약학적으로 허용가능한 비히클 또는 희석제와 함께 포함하는, 포유동물에서 심부전증을 치료하기위한 약학 조성물에 관한 것이다.
Patent KR-20000014488-A (KR)
Title: Process for the preparation of phenyl acetoxy acetic acid derivatives
Inventor: MIN YEON SHIK
IPC: C07C227/16
Filed: 1998-08-21
Abstract: PURPOSE: Preparing method of the title compound is provided which has a shorten reaction time and high yield. CONSTITUTION: Sodium 2-£(2,6-dichlorophenyl)amino|phenylacetate and alkyl haloacetate (CH2XCOOR1; R1 is C1- C7 alkyl group) are reacted at -30- 80 degree C in lower aliphatic alcohol derivatives such as C1- C7 alcohol or its ester in the presence of alkali metal carbonate such as potassium carbonate, sodium carbonate and phase transfer catalyst such as benzyl triethyl ammonium chloride, tetrabutyl ammonium bromide, tetrabutyl ammonium hydrogen sulfate, methyl trioctyl ammonium bromide, etc. and 18-crown-6. Obtained product is hydrolyzed at -30- 80 degree C for 2-8 hours in solvent such as C1-C4 alcohol, formic acid, acetic acid, propionic acid, butyric acid in the presence of catalyst such as inorganic conc. sulfuric acid or p-toluene sulfonic acid to give the title compound(I; R is hydrogen or C1- C7 alkyl group).
Patent KR-19990023971-A (KR)
Title: 크로만 유도체를 함유하는 안과용 용제
IPC: A61K9/00
Filed: 1998-08-28
Abstract: 본 발명의 목적은 활성 성분인 (2S, 4S)-6-플루오로-2'-5'-디옥소스피로[크로만-4,4'-이미다졸리딘]-2-카르복사미드의 눈내로의 침투를 개선한 안과용 용제를 제공하는 데 있다. 이 용제는 활성성분으로 (2S, 4S)-6-플루오로-2'-5'-디옥소스피로[크로만-4,4'-이미다졸리딘]-2-카르복사미드를 함유하며 삼투압 비가 1미만이고 점도가 1cP보다 크게 유지되므로써 활성 성분의 눈내로의 침투를 크게 개선시킨다.  점도 증진제로서, 예를 들면 셀룰로오스계 중합체가 사용된다. 이 중합체는 바람직하게는 히드록시프로필메틸셀룰로오스이다.
Patent KR-20000019057-A (KR)
Title: Balancer structure of compressor
Inventor: LEE SANG YONG
IPC: F04C29/00
Filed: 1998-09-08
Abstract: PURPOSE: A balancer structure of a compressor is provided to reduce the abrasion on a sliding face by lowering the friction of a bearing with a shaft and to improve the reliability of a compressor by removing the abnormality of function such as the lock event of a shaft by maintaining the gap of a shaft. CONSTITUTION: A balancer structure installs: a balance weight installed on the upper and the lower parts of a rotor and having weight to compensate the unbalanced force of a shaft; and a balancer(10,10A) consisting of a metal balancer(12) to compensate the unbalanced force to the shaft with weight. Therefore, the metal balancer is supported through a fluid film(13) to be flowed in a specific space and maintains the balancing of the shaft by compensating the unbalanced force of the shaft.
Patent KR-20000019162-A (KR)
Title: Compressor for damping vibration
Inventor: PARK DEOK GEUN
IPC: F04B39/00
Filed: 1998-09-09
Abstract: PURPOSE: A compressor is provided to solve the problems of vibration and noise due to the vibration by installing a part capable of directly damping the vibration from a compressor body. CONSTITUTION: A vibration damping compressor is composed of a compressor body(1) compressing a refrigerant, an outer case(3) protecting and supporting the compressor body, a supporting spring(4) installed inside the outer case and supporting the compressor body while damping vibration, and a fluid balancer(10) attached on one side of the compressor body to damp the vibration of the compressor body by fluid flow filled inside. Herein, the fluid is preferred to have specific gravity at least larger than mercury.
Patent KR-20000019657-A (KR)
Title: Waste tire incinerator for small-scale heating and retreatment method thereof
Inventor: JOO SEUNG GI
IPC: F23G5/00
Filed: 1998-09-14
Abstract: PURPOSE: A waste tire incinerator for small-scale heating is provided to reduce the amount of generated carbon monoxide and the time for retreating. CONSTITUTION: An incinerator(10) is composed of a combustion chamber(100), combustible material inlets(30,35), a burner(40) and a return piece(50). Gasoline put into the incinerator when the supply of fuel gas is stopped according to the complete combustion of rubber of a waste tire(1) is gasified because the incinerator is heated at high temperature. The gasified gasoline is transferred to a heat exchanger(70) with the carbon monoxide gas generated in incomplete combustion of ashes. Then the gasoline steam is burned according to the ignition of the inlet of a boiler by the burner. The carbon monoxide is oxidized to carbon dioxide so that the carbon monoxide is removed from the exhaust gas. Herein, the input amount of cool air is increased according to the input of the gasoline in retreating.
Patent KR-20000019941-A (KR)
Title: Device for displaying operating state of air conditioner and method thereof
Inventor: LEE GAP YEOL
IPC: F24F11/00
Filed: 1998-09-16
Abstract: PURPOSE: A device for displaying an operating state of an air conditioner is provided so a user as to check the operating state of the air conditioner by displaying the operating state of the air conditioner by comparing if the difference of temperatures of inhaling hole and of a vent hole is under a certain temperature. CONSTITUTION: A device for displaying an operating state of an air conditioner comprises; a sensor of vent temperature to detect the temperature of an air ventilated through a vent hole; a control device(104) for judging the operating state of the air conditioner by comparing if the difference of the temperature of ventilated air is under a predetermined certain temperature; and a displaying device(130) for displaying the operating state of the air conditioner according to the control signal from the control device.
Patent KR-19990029960-A (KR)
Title: 차량 에어컨용 다중유동형 응축기
IPC: F28B1/06
Filed: 1998-09-19
Abstract: 본 발명의 응축기는 서로 평행하게 배치되고 냉매의 유입구와 유출구를 갖는 한 쌍의 헤더파이프; 상호 등간격으로 격설되어 병렬로 배치되며, 그 양단부에서 한 쌍의 헤더파이프에 연결되며 다수의 내부 유체통로를 갖고 내부 유체통로의 수력직경이 1mm - 1.7mm 인 다수의 편평튜브; 편평튜브들 사이에 각각 개재되는 다수의 파형핀; 한 쌍의 헤더파이프 각각의 내부에 적어도 하나씩 설치되는 최소한 두 개의 배플; 배플들 각각은 헤더파이프들에 제공된 각각의 슬릿에 삽입되는 돌기를 가지며, 배플들 외주면은 대응되는 헤더파이프들의 내주면과 접면하여 헤더파이프들의 내부를 다수의 격실로 구획함으로써 냉매가 유입구과 유출구 사이에서 한 쌍의 헤더파이프와 다수의 편평튜브들에 의해 정해지는 다수의 냉매유로를 지그재그형태로 흐르도록 하며; 서로 인접하는 격실들 사이에 냉매의 소통로를 제공하여 주로 응축된 액상의 냉매를 통과시키기 위해 배플들의 적어도 하나에 바이패스통로를 형성하고, 이 바이패스통로의 수력직경이 편평튜브의 수력직경에 대한 비로 대략 0.285 내지 2.25범위; 및 냉매가 유입되는 유입구가 설치되는 일측 헤더파이프의 입구측 격실과, 입구측 격실에 대향하는 타측 헤더파이프의 격실과, 격실들 사이에 연결되는 편평튜브들에 의해 형성되는 입구측 유통로의 면적이 응축기 전체 유통로들의 면적에 대하여 30% 내지 65%의 범위인 것을 포함한다.
Patent KR-20000021282-A (KR)
Title: Semiconductor fabrication equipment having reactor chamber connected to gas supply line
Inventor: OH JAE SEOK
IPC: H01L21/02
Filed: 1998-09-28
Abstract: PURPOSE: A semiconductor fabrication equipment having a reactor chamber connected to a gas supply line is to basically remove a leakage cause that may be generated in a gas supply line when opening/closing the reactor chamber and thus improve the equipment workability. CONSTITUTION: A semiconductor fabrication equipment comprises: an upper electrode (110); a lid(130) coupled to the upper electrode; and a gas supply line(120) connected to the upper electrode through the lid. The gas supply line comprises a first line equipped in a cover of the reactor chamber and a second line connected to the first line, and having a bellows shape to prevent the gas leakage at the junction part between the first line and the second line when closing/opening the cover of the reactor chamber.
Patent KR-20000021890-A (KR)
Title: Apparatus for installing cooling fan into electronic device and portable computer having the apparatus
Inventor: NOH SOO HYUN
IPC: G06F1/20
Filed: 1998-09-30
Abstract: PURPOSE: An apparatus for installing a cooling fan into an electronic device and a portable computer having the apparatus is provided to effectively decrease a vibration and a noise occurred in a cooling fan. CONSTITUTION: A cooling fan(50) has a propeller(56) installed in a frame(52) on a hub(54).A screw(60) for fixing the cooling fan(50) or holes(58) for accepting a bolt is arranged at the corners of the frame(52). Positioning pins(76) are formed to a bottom surface of a housing(70). Positioning pins(76) are installed adjacent to an opening(72) formed on one side of the housing(70). The opening(72) is a path in which an inner air and an outer air flow by the cooling fan(50). A boss(74) is formed between positioning pins(76). A main bracket(10) is a supporting member for supporting the cooling fan(50). Spacers(30) are connected to holes(18) of the main bracket(10). Holes(42) are formed at both sides of a sub bracket(40). A hole(44) is formed between holes(42). The sub bracket(40) is combined to holes(42).
Patent KR-20000000005-A (KR)
Title: Treatment method of daylife waste
Inventor: JUNG PAN SUK
IPC: B09B5/00
Filed: 1998-10-16
Abstract: PURPOSE: A processing method of life wastes is provided to reduce the invested amount and to prevent the second pollution by separating life wastes by characteristic and making into a recycled state. CONSTITUTION: The processing method of day life wastes comprises: a separation chamber(4) in one side and a processing chamber(5) in the other side of a departed building(1); a conveyor(6) installed lengthwise in the separation chamber(4); at the same time, a separated wastes transferring conveyor(7-1¯7-9) arranged in a right angle to the conveyor(6), led to the one side from the separation chamber(4) to the storage chamber for processing(5); wastes separated by characteristics, transferred to the conveyor; wastes stored in the storage chamber as the processing chamber(5-1¯5-9); a processor(9) introduced in the other side of the storage chamber for processing(5-1¯5-9) to be treated at the recycled state.
Patent KR-20000031269-A (KR)
Title: Isotropic pitch for manufacturing carbon fiber and method for producing it
Inventor: WON HO YEON
IPC: C10C3/00
Filed: 1998-11-04
Abstract: PURPOSE: Provided is a method for manufacturing an isotropic pitch which has high softening point, melt spinnability, oxidation stabilization property and good carbonization yield. CONSTITUTION: NCC-DO(naphtha catalytic cracking decent oils) with 60 to 90 percent by weight of aromatic carbon content is used as a raw material. Temperature and amount of the halogen which is cross linking agent while adding affects property and the yield of the isotropic pitch. Halogen compound used for cross linking agent is one of the mixture composed of bromine chloride, thionyl chloride and sulfuryl chloride and the amount of halogen compound to add is 8-25 percent by weight of raw material at 240 to 260°C. One of the nitrogen and argon is used to remove remained molecule.
Patent KR-19990046220-A (KR)
Title: 하수처리 슬럿지케익의 고화처리 첨가제와 그 제조방법과 취급방법 및 그를 이용한 고화처리방법
Filed: 1998-11-12
Abstract: 본 발명은 하수처리 슬럿지케익의 고화처리 첨가제와 그 제조방법과 취급방법 및 그를 이용한 고화처리방법에 관한 것으로서, 더 상세하게는 후민산의 이온 치환을 통한 중화, 해체 작용을 촉진하는 물질과, 또 중금속의 이온과 쉽게 치환이 되는 물질로 구성되며 물에 작 녹도록 첨가제를 염화 처리시키는 하수처리 슬럿지케익의 고화처리 첨가제와 그 제조방법과 취급방법 및 그를 이용한 고화처리방법에 관한 것으로, 염화나트륨(NaCl) 19-24중량%와, 염화칼륨(KCl) 25-30중량%와, 염화마그네슘(MgCl) 14-19중량%를 순서대로 혼합시키는 제1혼합공정과; 제1혼합공정으로 혼합된 원료에 염화칼슘(CaCl 2 ) 14-19중량%와, 염화제2철(Fe 2 Cl 3 ) 1.5-2.5중량%를 순서대로 혼합시키는 제2혼합공정과; 제2혼합공정으로 혼합된 원료에 탄소(C) 0.5-1.5중량%와, 구연산(Citric Acid) 2-4중량%와, 활성제 5.5-8중량%와, 황산나트륨(NaSO 4 ) 2-4중량%를 순서대로 혼합시키는 제3혼합공정으로; 이루어짐을 특징으로 하는 하수처리 슬럿지케익의 고화처리 첨가제 제조방법을 제공하여, 슬럿지에 분무하여 투입할 경우 각 화학성분이 단독 또는 전체적인 이온반응으로 슬럿지 표면과 간극수에 다량 흡착된 후민산을 분해약화시켜 시멘트입자와 슬럿지 입자가 용이하게 접착하게 하고 후민산에서 분리된 부전하의 이온은 에트링가이트의 생성을 조장하는 운동에너지가 되며 장기적으로는 포졸란 반응에도 플러스의 기능을 갖게 하여, 유해성분이 외부로 용출되어 2차 환경오염을 발생시키는 것을 방지하고 고화처리한 슬럿지케익을 매립 또는 성토하였을 때 개량된 물성이 변하지 않는 것이다.
Patent KR-20000033170-A (KR)
Title: Absorption type cooling/heating system
Inventor: KANG IN SUK
IPC: F25B15/00
Filed: 1998-11-20
Abstract: PURPOSE: An absorption type cooling/heating system is provided to improve the performance of the system by increasing the temperature of the stronger solution generated during the absorption of the vapor refrigerant into the weaker solution up to the evaporation temperature in the regenerator and reducing the heat capacity in the regenerator. CONSTITUTION: An absorption type cooling/heating system includes a condenser(4), an evaporator(6), a heat exchanger(5) disposed between the condenser and the evaporator for heat exchange between liquid refrigerant and vapor refrigerant, an absorber(7,8,9) for making stronger solution from the vapor refrigerant and weaker solution generated in a regenerator(2), and a solution heat exchanger(11) for introducing the weaker solution to the absorber, wherein the absorber includes a first heating element of vapor refrigerant(101) for heat exchange between the vapor refrigerant from the refrigerant heat exchanger and the mixture fluid of the weaker solution of relatively high temperature and the vapor refrigerant, and the solution heat exchanger includes a second heating element of vapor refrigerant(102) for heat exchange between the vapor refrigerant from the first heating element of vapor refrigerant and the weaker solution.
Patent KR-20000033774-A (KR)
Title: Method for automatically searching channel and device for receiving digital broadcast thereof
Inventor: LEE SEONG RYONG
IPC: H04N7/24
Filed: 1998-11-25
Abstract: PURPOSE: A method for ACS(Auto Channel Searching) and a device for receiving a digital broadcast thereof are provided to realize an ACS mode stably and promptly. CONSTITUTION: A CPU(14) controls a tuner(11) for tuning from the first channel of entire physical channel area. Then, the tuner outputs the tuned signal to an OFDM(Orthogonal Frequency Division Multiplexing) demodulator(12). Then, the OFDM demodulator demodulates the tuned signal into the state before being demodulated into an OFDM type for outputting to an FEC(Forward Error Correction) unit(13). Herein, the OFDM demodulator calculates the strength of the tuned signal according to the characteristic of a chip for the CPU to find an effective channel. When the average of the strength of the signals is over 40% while being error-compensated, the CPU defines the tuned channel as the effective channel to be registered in an NVRAM(15). Then, the CPU tunes for the next channel for searching the effective channel until the last channel.
Patent KR-20000038028-A (KR)
Title: Apparatus and method for analyzing process message of call control processor(ccp) in base station controller(bsc)
Inventor: LEE KYU YONG
IPC: H04B7/26
Filed: 1998-12-03
Abstract: PURPOSE: An apparatus and method for analyzing a process message of a call control processor(CCP) in a base station controller(BSC) is provided to analyze the load and the performance of the CCP by collecting all transmitting and receiving messages and analyzing collected transmitting and receiving messages. CONSTITUTION: A message from a network interface card is read and a kind of the read message is checked(ST11-ST13). A receiving time and a kind of the message are stored, and the number of message is added according to a kind of the message and the added message is displayed when the message is a message defined in a call control processor(CCP) and a message received in the CCP(ST14-ST17). A receiving message of the CCP corresponding to the message is searched to compute a time difference of a receiving time and display the computed time difference when the message is a message defined in the CCP and a message transmitted in the CCP(ST18-ST21). All messages are stored and displayed when the message is a message not defined in the CCP(ST22,ST23).
Patent KR-20000040420-A (KR)
Title: System for measuring camber of slab using color image analysis system
Inventor: KIM PHIL HO
IPC: G01B11/16
Filed: 1998-12-18
Abstract: PURPOSE: A system for measuring a camber of a slab is provided to measure the camber in a real time and transmit the measured results to a casting control system. CONSTITUTION: A system for measuring a camber of a slab includes a support(10) along which the slab(S) passes, and a color CCD camera(20) disposed above the support(10). The CCD camera(20) is connected to both an image analysis system(21) for measuring the camber by receiving the image in a real time and a superior control system(22) for receiving and transmitting information on the slab(S) and the measured results. A monitor(23) is further provided to display the measured results so that a user can see the results.
Patent KR-20000040828-A (KR)
Title: Method for deep coloring processing of dyed polyester fabrics
Inventor: CHO HWAN
IPC: D06P5/02
Filed: 1998-12-19
Abstract: PURPOSE: An apparatus for deep coloring processing of polyester fabrics and knitting dyed uniformly with a compound having low refractive index on its surface is provided which can improve color saturation of dyed polyester fabrics by coating a compound having low refractive index on its surface. CONSTITUTION: In a padding apparatus comprising a chemical tank (10) containing a softening agent and an antistatic agent, a dipping roller (20) for dipping dyed polyester fabrics (1), which is installed on the chemical tank, a pair of padding rollers (30)(40) for padding dipped fabrics, a dry roller (50) for drying padded fabrics, and a dryer (60), the deep coloring apparatus comprises a chemical tank for containing a compound having low refractive, which is installed a dipping roller (70) on its inside (80); a pair of coating rollers (90)(100) installed on one side of the padding roller for passing; an endless non woven (110) for attaching a compound having low refractive on the fabrics by winding on the dipping roller and coating roller; an expand roller (120) for expanding the contracted non woven fabric in situ; and a tension regulator (130) for controlling a felt tension.
Patent KR-20000044761-A (KR)
Title: Method for reproducing mp3 audio signals in digital television
Inventor: JANG CHEOL JIN
IPC: H04N5/44
Filed: 1998-12-30
Abstract: PURPOSE: A method for reproducing MP3 audio signals in a digital television is provided to reproduce MP3 audio signals in a general digital television. CONSTITUTION: A method for reproducing MP3 audio signals in a digital television comprises the following steps. Digital MP3 audio data are received from outer equipments and the received digital MP3 audio data are stored. An operation of a decoding portion is switched a decoding mode for the digital MP3 audio data if a key signal is input to reproduce the stored digital MP3 audio data. The digital MP3 audio data are decided by the decoding portion. The decoded digital MP3 audio data are analog signals and the converted analog signals are output.
Patent KR-20000046115-A (KR)
Title: Method for transferring alarm information between subscriber interface board and high level shelf
Inventor: CHOI MOON HO
IPC: H04L7/00
Filed: 1998-12-31
Abstract: PURPOSE: A method for transferring alarm information between a subscriber interface board and a high level shelf is provided to transfer the alarm information generated in the subscriber interface board of a DSLAM(Digital Subscriber Line Access Multiplexor) apparatus to the subscriber transmitting/receiving board inside of a high level shelf. CONSTITUTION: If alarm information is generated in a modem shelf subscriber board and a modem shelf data transmitting/receiving board, the alarm information is transferred to the modem shelf data transmitting/receiving board from a modem shelf management board(S100). The modem shelf data transmitting/receiving board transfers the alarm information to the subscriber transmitting/receiving board of a high level shelf through an STM-1 transfer path(S200). The subscriber transmitting/receiving board transfers the alarm information to a power distribution device(S300). The power distribution device reads the alarm information and displays the alarm generated in a subscriber interface board(S400).
Patent KR-20000047318-A (KR)
Title: Chemical treatment of non-disintegrating organic matter
Inventor: KIM DO KYEM
IPC: C02F1/72
Filed: 1998-12-31
Abstract: PURPOSE: A chemical treating method of highly concentrated organic matter is provided, which is characterized in that an ejector is installed so that perfect mixing is performed by strong whirling flow. CONSTITUTION: To remove non-disintegrating organic matter, penton oxidation process is applied. To increase the contacting frequency of the catalyst, peroxide, and organic matter, perfect mixing condition is needed. So, high performance compact reactor is provided in venturi ejector type. Air contacts with wastewater and dispersed, and circulated through ejector head. The wastewater is mixed with penton oxidizing catalyst by strong whirling flow, and oxygen in the air is transmitted so that oxidizing reaction can be occurred. Because the peroxide reacts with contaminants within one hour, floating phenomenon of sludge does not exist, and suspended solids are removed by coagulating.
Patent KR-19990028732-A (KR)
Title: 샤프트 장치 및 샤프트 장치 냉각방법
IPC: F16C37/00
Filed: 1996-06-20
Abstract: 샤프트장치는  지지부재 (7a) 에 의해 지지된 샤프트 (6) 로 이루어져 있고  비교적 따뜻한 공간 (2) 으로 연장한다.     따뜻한 공간 (2) 으로부터 열이  지지부재 (7a) 를 냉각하도록 지지부재를 관통하는 것을 방지하기 위해서,  채널이  샤프트 (6) 와 지지부재 (7a) 사이 경계영역에  배열된다.     채널은  샤프트 (6) 의 세로 방향 (X-X) 에  나선형이나 샤프트의 세로방향에 직선으로 연장될 수 있다.
Patent KR-19990043993-A (KR)
Title: 티로신 키나아제 저해제로서의 비시클릭4-아랄킬아미노피리미딘 유도체
IPC: A61P25/28
Filed: 1997-06-03
Abstract: 본 발명은 티로신 키나아제 저해제인 하기 화학식 I 의 신규 및 공지된 비시클릭 4-아랄킬아미노피리미딘 유도체 및 그의 약제학적으로 허용가능한 염에 관한 것이다: 
     [화학식 I] 
     
       
     
     (식중, 
     A 는 벤젠 또는 이미다졸 고리이고; 
     B 는 벤젠, 테트랄린, 인단 또는 2-옥신돌 고리이고; 
     R 은 (C 1 -C 4 ) 퍼플루오로알킬, 페닐, 페닐-(C 1 -C 4 )알킬, 히드록시-(C 1 -C 4 )알킬, (C 1 -C 4 )알콕시-(C 1 -C 4 )알킬, (C 2 -C 4 )아실옥시-(C 1 -C 4 )알킬, 할로벤조일옥시-(C 1 - C 4 )알킬, 카르복시, 카르바모일, (C 1 -C 4 )알콕시카르보닐, 시아노, (C 1 -C 4 )알킬카르보닐, 카르복시-(C 1 -C 4 )알킬, 카르바모일-(C 1 -C 4 )알킬, (C 1 -C 4 )알콕시카르보닐-(C 1 -C 4 )알킬, 할로-(C 1 -C 4 )알킬, 아미노-(C 1 -C 4 )알킬, 모노- 또는 디-(C 1 -C 4 )알킬아미노-(C 1 -C 4 )알킬, 술포-(C 1 -C 4 )알킬 또는 술파미도-(C 1 -C 4 )알킬이고; 
     R 1 및 R 2 각각은 독립적으로 수소, C 1 -C 4 알킬, C 1 -C 4 알콕시, 할로겐 또는 -NR 5 R 6 (R 5 및 R 6 각각은 독립적으로 H 또는 C 1 -C 4 알킬이다) 이고; 
     R 3 및 R 4 각각은 독립적으로 수소, C 1 -C 4 알킬, 할로겐, 히드록시, C 1 -C 4 알콕시, C 1 -C 4 알콕시카르보닐, 니트로, 시아노 또는 CF 3 이다).
Patent KR-19990063946-A (KR)
Title: 반도체 레이저 및 이 반도체 레이저를 이용한 광디스크 장치
IPC: H01S5/06
Filed: 1996-09-17
Abstract: n형 GaAs 기판(701)상에, n형 GaAs 버퍼층(702), AlGaInP의 n형 클래드층(703), AlGaInP 및 GaInP로 이루어지는 다중 양자 우물 구조의 활성층(704), p형의 AlGaInP로 이루어지는 제 1 p형 클래드층(705a), 광가이드층(707),제 2 p형 클래드층(705b), p형의 GaInP로 이루어지는 가포화 흡수층(706), AlGaInP로 이루어지는 제 3 p형 클래드층(707)이 순차적으로 형성되어 있다.  본 구조에는, 가포화 흡수층의 부피를 작게 함과 동시에 광가이드층을 설치하고 있다.  가포화 흡수층의 부피를 작게 할수록, 캐리어 밀도를 용이하게 올릴 수 있으며, 포화 상태로 되기 쉽고, 가포화 흡수의 효과가 현저하게 된다.  이것에 의해, 안정한 자려 발진 특성이 얻어지며, 그 결과, 상대 잡음 강도가 낮은 반도체 레이저를 실현할 수 있다.