baber/WOPTO huggingface dataset:
Patent KR-20000007210-A (KR)
Title: Method of isolating semiconductor device
Inventor: HAN JIN SOO
IPC: H01L21/76
Filed: 1998-07-01
Abstract: PURPOSE: The method improves the planarization of an isolation region(14') and stabilizes the electrical characteristics of a semiconductor device. CONSTITUTION: The method is to form a dummy active pattern on the middle of the isolation region using a trench technology. A trench is formed on a semiconductor substrate(10) so that an isolation pattern exists inside the dummy active pattern corresponding to a group comprising a region where a first conductive region and a second conductive region of the semiconductor substrate, a metal line bottom and a dummy transistor. By the method, a dummy active pattern reticle is fabricated by removing the dummy active pattern selectively causing the deterioration of the electrical characteristics when forming the dummy active pattern inside the isolation region for the planarization of the isolation region of the large integrated semiconductor device.
Patent KR-20000014223-A (KR)
Title: Nonlinear digital/analog converter
Inventor: LEE WON GI
IPC: H03M1/66
Filed: 1998-08-18
Abstract: PURPOSE: A nonlinear digital/analog converter achieves a nonlinear output by using the superposed resistors. CONSTITUTION: The nonlinear digital/analog converter includes a first reference voltage selection switching part(21), resistors blocks(23), a second reference voltage selection switching part(24), and an output switching part(27). The first reference voltage switching part selectively outputs first and second reference voltages(Vh1)(Vc1) among external reference voltages (Vref£1...(2¬n/2|), and selectively outputs the third and fourth reference voltages(Vh2)(Vc2) among external reference voltages (Vref£0...(2¬n/2)-1|). The resistors blocks receives the reference voltages from the first reference voltage switching part, generates a voltage which is divided by (Vh£0...(2¬n/2)-1|) levels, and a voltage which is divided by (Vl£0...(2¬n/2)-1|) levels. The second reference voltage selection switching part generates a first voltage(V1), a second voltage(V2), and a third voltage(V3). The output switching part selectively outputs one among the first to third analog conversion voltages(V1,V2,V3). Thereby, a converter size is reduced, a nonlinear DAC having accurate conversion value is provided.
Patent KR-20000014769-A (KR)
Title: Movement presuming method of an image encoding device
Inventor: LEE EUI-WON
IPC: H04N19/51
Filed: 1998-08-22
Abstract: PURPOSE: A movement presuming method is provided to allow easy real time embodiment reducing the calculation quantity of the presumed vector movement by calculating the half pixel unit vector movement through the presumption of the movement at the previous frame picture. CONSTITUTION: The movement presuming device comprises a decimation filter part(42); a first movement presuming part(30); a second movement presuming part(44):and a half pixel movement presuming part(46). In the method, the decimation filter part(42) decimates the picture of the present frame into 1/2 from the input buffer and decimates the previous frame picture into 1/2. The first movement presuming part(30) calculates the search block of 8x8 pixel with a full search method within the decimated search window block. the second movement presuming part(44) calculates the precise movement vector of the pixel unit and the half pixel movement presumption device(46) calculates the precise vector movement of the half pixel by carrying out the general half pixel unit movement presumption. The decimation part(42), the second movement presumption part(44) and the half pixel movement presumption part are materialized as one DSP integrated circuit(40).
Patent KR-20000019844-A (KR)
Title: Method for erasing data in flash memory
Inventor: MUN YANG GI
IPC: G11C16/00
Filed: 1998-09-16
Abstract: PURPOSE: A method for erasing a data in a flash memory is provided to erase a recoded data of a memory cell by supplying a bias voltage pulse for recovering an over-erasing. CONSTITUTION: A method for erasing a data in a flash memory comprises the step of providing a bias voltage pulse for recovering an over-erasing of a front end portion or a rear end portion of a bias voltage pulse period applied to a drain or a source of a memory cell when performing an erasing operation. Accordingly, by performing an erasing operation together with a programming for recovering the over-erased cell, the erasing operation is stably performed.
Patent KR-20000021025-A (KR)
Title: Programmable logic array apparatus
Inventor: LEE SEONG GEUN
IPC: H03K19/00
Filed: 1998-09-25
Abstract: PURPOSE: A programmable logic array apparatus is provided to diminish a waste of power consumption of a programmable logic array. CONSTITUTION: A programmable logic array apparatus comprises: a first switch detector(200) detecting whether a Programmable Logic Array(PLA) input signal inputted from outside is switched or not and generating a first pulse signal, and generating the PLA input signal responding to a first control signal and the first pulse signal; a first AND operation array(210) receiving the PLA input signal generated by the first switch detector(200) and performing AND operation responding to the first control signal; a second switch detector(220) receiving a feedback signal from an OR operation array(240) and sensing whether the PLA input signal is switched or not and generating a second pulse signal, and generating the feedback signal responding to a second control signal and the second pulse signal; a second AND operation array(230) being connected to the first AND array(210), receiving the feedback signal generated from the second detector(220), and performing AND operation responding to the second control signal; an OR operation array(240) being connected to the second AND operation array(230) and performing OR operation responding to a third control signal; a control signal generator(250) generating the first to third control signal responding to non-duplication 2-phase clock signal, the first and the second pulse signal; and an output buffer(260) being connected to the OR operation array(240) and generating the last output signal responding to the third control signal, transmitting the feedback signal to the second switch detector(220).
Patent KR-19990037083-A (KR)
Title: 이미지 스캐너 및 투과 이미지 매체 상의 표면 결점 검출 방버부
IPC: G06T1/00
Filed: 1998-10-14
Abstract: 본 발명은 광학 이미지 스캐너 내에서 투과 이미지(300) 상의 표면 결함 또는 결점(artifact)을 검출하기 위한 장치 및 방법을 제공하며, 결과적으로 된 이미지를 수정한다. 스캔(scan)에서 이 이미지는 정상적으로 스캔된다. 표면 결함 및 결점, 예를 들어, 먼지, 스크래치, 및 지문은 적외선 광(infrared light)(304)에 의한 개별적인 스캔을 제공함으로써 또는 산란된 측정 광(화이트(white) 또는 적외선)에 의하여 검출될 수 있으며, 또는, 결함 및 결점에 의하여 회절된다. 조명(406, 410)에 대한 개별적인 광로가 사용될 수 있으며, 또는 세기 측정(510)에 대한 개별적인 광로가 사용될 수도 있다. 다음, 이미지 처리는 개별적인 스캔에서 인지된 결함에 대응하는 정상적인 스캔 내의 영역을 수정하는 데에 사용된다.
Patent KR-20000026790-A (KR)
Title: Assignment device of cdma communication system and the method thereof
Inventor: GU CHANG HOE
IPC: H04J13/00
Filed: 1998-10-19
Abstract: PURPOSE: An assignment device of a CDMA(Cord Division Multiple Access) system and the method are provided to increase a channel capacity of a forward link using a Quasi-orthogonal code, by using the Quasi-orthogonal code regardless of limitation of a Walsh-orthogonal code in a mobile communication system with the CDMA, by assigning channels using the Quasi-orthogonal code using a channel assignment procedure and the messages. CONSTITUTION: A base station communication device of a CDMA(Cord Division Multiple Access) communication system comprises a data storage unit with a resource-shape, a controller, a channel transmitter, and a control channel transmitter. A method for assigning channels of a base station in a CDMA(Cord Division Multiple Access) communication system comprises the steps of: examining whether an orthogonal code is available when assigning channels, and deciding whether a Quasi-orthogonal code is available according to the result; selecting an index of the orthogonal code and a mask number of the Quasi-orthogonal code when deciding to use the Quasi-orthogonal code, and generating the Quasi-orthogonal code; assigning the generated Quasi-orthogonal code to a channel of an available forward link; generating messages related to the channel assignment and transmitting the messages to a mobile station through other channels.
Patent KR-20000031218-A (KR)
Title: Method for producing fine structural having fluid sprayer
Inventor: LEE BYEONG CHAN
IPC: B41J29/00
Filed: 1998-11-04
Abstract: PURPOSE: A method for producing a fine structural fluid sprayer is provided to increase adhesion with a membrane and a nozzle unit by adding a flatting process removing a protrusion in the upper end of a driving unit and by forming an adding layer on the bottom of a lower wall in the driving unit. CONSTITUTION: A method for producing a fine structural fluid sprayer comprises the steps of forming an insulating layer(12) on a substrate(11), forming an electrode unit(14) and a heating body(13) on the insulating layer, forming a lower wall(15) on the electrode unit and the insulating layer to make a driving fluid chamber(16) around the heating body and forming driving unit(10) by flatting the upper end of the lower wall. Then, the fluid sprayer is assembled by sticking a membrane(20) on the flatted driving unit and by sticking a nozzle unit(30) on the membrane. Therefore, the adhesion between the membrane and the nozzle unit is increased by removing projected parts with the flatting process.
Patent KR-20000032813-A (KR)
Title: High efficient chip inverter for el lamp for subminiature electronic apparatus application
Inventor: PARK SUNG
IPC: H05B41/26
Filed: 1998-11-18
Abstract: PURPOSE: A high efficient chip inverter for EL(Electroluminescence) is provided which has high efficiency with one chip by integrating an inverter circuit for EL device using an enhancement MOSFET and by integrating an inverter on the above chip. CONSTITUTION: A first connector body comprises an inductor L and a MOSFET Q1. One side of the inductor L is connected serially to + side of an input power P and the MOSFET Q1 of switching device is connected to another side of the inductor L. A second connector body has serially-connected resistors R1 and R2 which are connected in parallel with MOSFETs Q2, Q3, Q4 and Q5. And the first connection body is connected in parallel with the second connection body. A power conversion oscillator is connected to a gate of MOSFET Q1, and a lamp driving oscillator is connected to gates of MOSFETs Q2, Q3, Q4 and Q5. And a diode D is connected between the inductor L and the drain of MOSFET Q2 so that a cathode of the diode D is toward the MOSFET Q2. A comparator is connected between a mmiddle connection point of resistor R1 and R2 and the power conversion oscillator so that an output part of the comparator is toward the power conversion oscillator. The first and second connection body, the diode D and the comparator are integrated on a first layer and the inductor L is integrated as a second layer on the first layer.
Patent KR-20000032849-A (KR)
Title: Powder molding material using high weather-resistant polyepoxy resin and preparation method thereof
Inventor: YU TAEK SANG
IPC: C04B35/622
Filed: 1998-11-18
Abstract: PURPOSE: A powder molding material using high weather-resistant polyepoxy resin and a preparation method thereof are provided, which are able to provide medium or large type molding materials having weather-resistance, mechanical strength and electrical insulating property. CONSTITUTION: The powder molding material comprises: (i) a high weather-resistant polyepoxy resin; (ii) an acidic anhydride hardener such as hexahydrophtalic anhydride; (iii) an accelerating agent selected from triphenyl phosphine, imidazole derivative and dicyan diamide; (iv) an inorganic filler; and (v) internal parting powder. The method comprises steps of: (i) pulverizing the high weather-resistant poly epoxy resin and the hexahydrophtalic anhydride; (ii) after pulverizing the accelerating agent, the inorganic filler and the internal parting powder agent respectively, mixing them with the pulverized materials of step (i); (iii) ripening the mixed pulverized materials with powder roll at a temperature of 100-130°C; and (iv) after quickly cooling the step (iii) to a fixed temperature, pulverizing it to prepare as powder phase.
Patent KR-20000039162-A (KR)
Title: Apparatus for supplying oil of linear compressor
Inventor: HEO JONG TAE
IPC: F04B17/04
Filed: 1998-12-11
Abstract: PURPOSE: An apparatus for supplying oil of a linear compressor is provided to apply a second vibration of a compressing unit to a small dual type linear compressor and enable oil supply apparatus to be installed in the compressing unit, thereby achieving the miniaturization of the compressor. CONSTITUTION: An apparatus for supplying oil of a linear compressor includes a compressing unit(c) installed in the inside of an airtight container(v) having filled with oil in the bottom of the airtight container(v) for sucking and compressedly discharging the gas, an oil piston(120) inserted slidably for pumping oil filled in the airtight container(v) with performing a rectilineal reciprocation by being contacted a movable part when the movable part of a linear motor formed in the compressing unit performs a rectilineal reciprocation, an elastic member mounted on the opposite part of the movable part of the oil piston(120) for returning the oil piston pushed by the movable part, and an oil valve(150) preventing oil pumped by the oil piston from flowing backward.
Patent KR-20000039703-A (KR)
Title: Method for converting operation between agent of communication management network and management portion of common object request broker architecture in atm
Inventor: LEE GIL HAENG
IPC: H04L12/24
Filed: 1998-12-15
Abstract: PURPOSE: A method for converting an operation between an agent of a communication management network and a management portion of a common object request broker architecture in an ATM is provided to convert a protocol and management information by installing a gateway between a CORBA(Common Object Request Broker Architecture) manager and a CMIP(Common Management Information Protocol) agent. CONSTITUTION: A method for converting an operation between an agent of a communication management network and a manager of a CORBA(Common Object Request Broker Architecture) in an ATM comprises the following steps. A management object and mapping information are stored by requesting a management operation and management information from a communication management network agent. A proxy management object manager is searched to perform the management operation and the management information. The management operation and the management information are converted and transmitted. The management operation and the management information are performed and the performed results are transmitted. The performed management object information is stored and it is transmitted to a proxy management object manager in the next command.
Patent KR-20000040393-A (KR)
Title: Method for establishing recording mode in vcr
Inventor: YANG WON MO
IPC: G11B15/02
Filed: 1998-12-18
Abstract: PURPOSE: A method for establishing a recording mode in a VCR is provided to stably operate the recording mode by letting a user establish the recording mode of the VCR on an OSD menu while eliminating a recording mode switch. CONSTITUTION: A tape for recording or for playing back is inserted to a deck for inputting a menu selecting signal. Then established VCR menus are displayed on a screen. If a recording menu is selected, the deck is converted into the recoding mode. If a recording key input signal is fed in the recoding mode, an external image signal to be recorded is recorded in the inserted videotape. Therefore, the recording mode is established on an OSD menu regardless of the existence of a recording tap for recording the external image signal in the videotape by selecting the recording key while eliminating a recoding mode switch.
Patent KR-19990024253-A (KR)
Title: 공중전화 음성광고 카드
Filed: 1998-12-28
Abstract: 현대 사회를 살아가면서 날아갈수록 정보통신의 발전과 이용이 급증하면서 통신을 이용한 광고를 생각하게 되었으며 그 중에서 공증전화카드를 이용한 음성광고 카드를 개발하면 기업홍보 및 광고효과를 극대화 할 수 있다는 점을 착안하여 기존의 ARS 시스템과 공중전화기의 보완으로 가능합니다.
Patent KR-20000047059-A (KR)
Title: Digital still camera with multi exposure capability
Inventor: KIM YONG JIN
IPC: H04N5/225
Filed: 1998-12-31
Abstract: PURPOSE: A digital still camera with multi exposure capability is provided to amplifier the intensity of light when taking pictures of small intensity, in order to attain high quality picture. CONSTITUTION: A digital still camera with multi exposure capability includes a CCD(2), a CDS/AGC(3), an A/D converter(4), a DSP(5), a mixing memory, a JPEG processor(7a), a compression storage memory(8a), a manipulation key input, a controller(9a) and a liquid crystal display panel(11a). The CDS/AGC(3) adjust gain automatically. The DSP(5) receives the output of the A/D converter and processes image signal such as white balance, edge correction, brightness/color signal compensation. The mixing memory(100) stores 1 frame image information temporarily. The JPEG processor(7a) compresses the image signal. The compression storage memory(8a) stores the output of the JPEG processor. The controller(9a) outputs a first coefficient(a) and a second coefficients(b) to the manipulators.
Patent KR-19990028812-A (KR)
Title: 프린트배선판의측온형외부접속기구
IPC: G01K1/14
Filed: 1997-08-11
Abstract: 프린트 배선판(1)의 소정 끝단가장자리가 끼워넣음 가능한 단면 ㄷ자형상의 탄성 금속편(2)을 강성절연재료제의 단자대(3)에 유지시킨다.  외부접속용의 단자(4)를 단자대(3)에 고정하고 금속편(2)으로 밀착시켜 전기적으로 접속한다.  온도검출소자(13)를 프린트 배선판(1)의 상기 소정 끝단가장자리에 고정하고 해당 배선판(1)의 상기 회로에 접속한다.  금속편(2)의 일단을 타단의 방향으로 구부려 접촉자(6)를 형성하며, 금속편(2)의 타단을 단자(4)의 후단부로 구부려 온도검출소자(13)에 걸어맞춤 가능한 형상의 측온부(7)를 형성한다.  사용시 프린트 배선판(1)의 소정 끝단가장자리를 ㄷ자형상 탄성 금속편(2)에 끼워넣을 때에 단자(4)를 접촉자(6) 경유로 프린트 배선판(1)의 회로에 접속하고 온도검출소자(13)를 측온부(7)로 걸어맞춤시켜 단자(4) 후단부의 온도를 측정하여 온도검출소자(13)의 출력을 상기 회로에 제공한다.
Patent KR-19990028830-A (KR)
Title: 비 접촉검사용 레이저 유도 금속성 플라즈마
IPC: G01R1/07
Filed: 1996-07-11
Abstract: 몇 개의 도전성 경로를 가지는 전기 부품을 검사하는 장치로서 이 장치는 시험할 부품의 도체(14)에 침범하는 레이저 맥동을 수행하여 금속성 플라즈마를 형성하고, 도체와 플라즈마에 따라 전기적 회로를 형성하는 한 쌍 이상의 탐침(16)을 수행하는 기구(10)를 구비한다. 최종적으로 이 장치는 도체와 탐침사이의 플라즈마를 경유하는 도전의 양에 반응하는 감지기(18)을 구비한다.
Patent KR-19990036306-A (KR)
Inventor: CHEUNG JOSEPHINE HO-WAH
IPC: C04B18/14
Filed: 1996-07-12
Abstract: 본 발명은 분쇄 보조제 및 로울 프레스의 슬래그 피드를 약 4중량% 이하의 물과 조합된 약 0.002 내지 0.2중량%의 폴리아크릴산 또는 이의 알칼리 금속염으로 처리하여 과립 용광로 슬래그를 분쇄시키는 향상된 로울 프레스 방법에 관한 것이다.
Patent KR-19990036323-A (KR)
Title: 가교성 전도성 조성물, 전도체 및 그의 형성 방법
IPC: C08L101/00
Filed: 1996-08-09
Abstract: 본 발명은 일차적으로 (a) 술폰산기 및/또는 카르복실기를 갖는 가용성 전도성 중합체, (b) 가용성 전도성 중합체 (a) 의 술폰산기 및/또는 카르복실기와 반응가능한 두 개 이상의 관능기를 갖는 화합물을 포함하는 조성물에 관한 것이다.
Patent KR-20000064253-A (KR)
Title: 어획용 바닥 트롤어망 및 이를 위한 음향 방출기
IPC: A01K79/02
Filed: 1997-07-21
Abstract: 전방 부분 및 코드-말단 부분을 가지며, 표준 바닥 트롤어망에 보통 존재하는 이러한 구성요소가 포함된 어획용 바닥 트롤어망(1)은 트롤어망 입구부의 전방에 음향 유도대를 생성시키기 위해 음향 방출기(2)와 함께 사용된다.  상기 방출기는 트롤어망에 의해 견인되는 운반체의 전방 말단에 고정된 변환기 수단을 포함하여 운반체의 밀폐 부분 내측에 위치한 장비를 가동시킨다.  변환기 수단은 트롤어망 이동 방향에 대하여 실질적으로 수평으로 배향된 부채꼴 모양의 음향 유도대(5,6)를 형성시키는데 적합하며, 상기 음향 방출기는 최적 수준의 음향 압력이 트롤어망의 상부 라인위의 상기 음향 유도대의 하부에서 달성되도록 변환기의 배향각이 설정되도로록 조절될 수 있다.
Patent KR-19990076694-A (KR)
Title: 안전한 통신로 구축 시스템 및 방법
IPC: G07F7/10
Filed: 1996-12-20
Abstract: 어떤 통신 당사자의 안정성도 해치지 않고서, 불안전한 개방 네트워크 상에 안전한 통신로를 구축하는 시스템 및 방법에서는 인터넷과 보호를 원하는 당사자간에 안전한 게이트웨이 또는 방화벽을 구축하되, 1.) 상기한 방화벽으로서 작용하는 컴퓨터와 인터넷 상의 클라이언트 노드 사이에 공유 비밀키를 분배하는 스마트카드를 사용하며; 2.) 공유 사설키를 사용하여 게이트웨이와 스마트카드간의 상호 인증을 구축하며; 3.) 일단 통신 구축 후 게이트웨이와 클라이언트 노드 간의 더 이상의 통신에 사용하기 위한 세션 비밀키 또는 임시 비밀키를 생성하며; 4.) 세션키를 사용하여 더 이상의 통신을 암호화한다.
Patent KR-19990082057-A (KR)
Title: 대기 메시지 생성 수단을 구비한 휴대용 원격 통신 장치
IPC: H04M1/00
Filed: 1997-10-20
Abstract: 휴대용 원격 통신 장치는 무선 송수신기, 키패드(keypad), 디스플레이, 메모리 수단, 및 장치 기능을 제어하기 위한 마이크로프로세서를 포함하는 것으로 공지되어 있으며, 상기 장치는 착신자에 의해 제어될 수 있으며, 인입 호출이 호출자로부터 수신되면, 상기 장치는 착신자를 경고하기 위한 경고 수단을 더 포함한다. 장치는 호출자를 위해 의도된 대기 메시지를 생성하기 위한 메시지 생성 수단을 포함하며, 호출자에게 대기 메시지의 주기적 전송을 개시하며, 상기 대기 메시지를 전송하는 동안 상기 장치를 대기 상태로 두기 위한 제 1 개시 수단을 포함하고, 상기 대기 메시지의 전송을 멈추며, 대기 메시지의 전송을 멈춘 후에 표준 통신 모드로  상기 장치를 변환하기 위한 제 2 개시 수단을 포함하고, 상기 제 1, 및 제 2 개시 수단은 착신자에 의해 제어될 수 있다. 첨부하면, 착신자는 대화를 시작하기 전에, 보다 더 적당한 장소로 우선 이동할 수 있다. 호출자는 대기 메시지를 주기적으로 수신하여 현재 상황을 이해하며, 착신자가 통화를 시작할 때까지 기다릴 것이다.
Patent KR-20000005116-A (KR)
Title: Cosmetic detergent compositions for capillary use and utilization
Inventor: DECOSTER SANDRINE
IPC: A61K8/89
Filed: 1997-04-16
Abstract: PURPOSE: A cosmetic composition is provided to have an improved characteristic for a cleansing and conditioning hair and to contain a cleaning base being composed of a surfactant having a cleansing force. CONSTITUTION: The invention discloses new conditioning and detergent hair care compositions comprising, in a cosmetically acceptable medium (A), a washing base containing an anionic surfactant and an amphoteric surfactant of the C10-C14 alkyl betaine type and (B) a conditioning system containing at least one alkaline guar gum and at least one insoluble silicon, the said silicon being introduced into the composition in non-emulsified form. The invention is useful for hair cleaning and care.
Patent KR-20000010536-A (KR)
Title: Radio frequency noise canceller
Inventor: CIOFFI JOHN M
IPC: H04L27/26
Filed: 1997-04-17
Abstract: PURPOSE: A technique for removing radio-frequency noise from received signals is provided for high speed data communications. CONSTITUTION: Radio-frequency noise is removed by adaptively estimating the radio-frequency noise during data transmission using information obtained when no data is actually being transmitted. A receiver has a transformer having an input terminal coupled to a transmission medium, an output terminal for outputting a differential signal, and a reference terminal for outputting a reference noise signal; a radio frequency noise canceller coupled to transformer for canceling certain radio frequency noise from the differential signal to produce a noise-canceled differential signal; and processing circuitry for decoding the noise-canceled differential signal to obtain the data. The radio frequency noise canceller includes at least an adaptive filter for producing a noise cancellation signal by filtering a reference noise signal based on filter parameters, a subtractor for subtracting the noise cancellation signal from the differential signal to produce the noise-canceled differential signal, and an update circuit for enabling, at predetermined times, modification of the parameters of adaptive filter based on the then existing noise-canceled differential signal.
Patent KR-20000022119-A (KR)
Title: Catalyst and method for preparing aldehyde under catalyst
Inventor: BARMAN HELMUT
IPC: C07B61/00
Filed: 1997-06-18
Abstract: PURPOSE: A catalyst and a method for preparing aldehyde under the catalyst are provided. CONSTITUTION: The catalysts consists of rhodium and a compound of the following formula, where R¬1, R¬2 and R3 are same or different from one another, and each R¬1, R¬2 and R3 is independently selected from hydrogen, alkyl group having 1-4 carbon atoms, alkoxy group having 1-4 carbon atoms and alkenyl group having 2-4 carbon atoms, and R¬1, R¬2 and one carbon atom form a ring having 6 carbon atoms; m and n are independently 0 or 1, and (m+n) is 1 or 2; R is selected from phenyl radical, naphthyl radical, phenyl radical or naphthyl radical substituted by substituent selected from alkyl group having 1-4 carbon atoms, dialkylamino group having 2-8 carbon atoms and amino group having 2-8 carbon atoms. The aldehyde is prepared by reacting carbon monoxide with hydrogen under the catalyst.