baber/WOPTO huggingface dataset:
Patent KR-20000029767-A (KR)
Inventor: FISHER LINER
IPC: C07F9/6561
Filed: 1997-08-05
Abstract: PURPOSE: A phenyl-substituted cyclic ketoenol, many preparation methods and it's use for agricultural chemical and herbicide are provided. CONSTITUTION: The phenyl-substituted cyclic ketoenol is represented by the following formula (i), where X represents halogen, alkyl, alkenyl, alkynyl, alkoxy, alkynyloxy, alkylthio, alkylsulfinyl, alkylsulfonyl, halogenoalkyl, halogenoalkenyl, halogenoalkoxy, halogenoalkenyloxy, nitro or cyano, or each optionally substituted phenyl, phenoxy, phenylthio, benzyloxy or benzylthio, Y represents hydrogen, halogen, alkyl, alkenyl, alkynyl, alkoxy, alkenyloxy, alkylthio, alkylsulfinyl, alkylsulfonyl, halogenoalkyl, halogenoalkenyl, halogenoalkoxy, halogenoalkenyloxy, nitro or cyano, Z represents halogen, alkyl, alkenyl, alkynyl, halogenoalkyl, alkoxy, alkenyloxy, halogenoalkoxy, halogenoalkenyloxy, nitro or cyano, n is an integer of 0-3, A represents hydrogen, each optionally halogen-substituted alkyl, alkenyl, alkynyl, alkoxyalkyl, polyalkoxyalkyl or alkylthioalkyl, or saturated of unsaturated cycloalkyl, each of which is optionally substituted and has at least one ring atom replaced by hetero atom, or aryl, arylalkyl or het-aryloxy, each of which is optionally substituted by halogen, alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, cyano or nitro and is optionally substitutive by substituted phenoxy, benzyloxy or het-aryloxy, B represent hydrogen, or alkyl or alkoxyalkyl, each of which is optionally substituted by halogen, A, B and bonded carbon atom therewith represent substituted or unsubstituted ring which is saturated or unsaturated and optionally contains hetero atom, and G represents hydrogen(a) or one of the following formulae (b)-(g), where E is metal ionic equivalent or ammonium ion, L represents oxygen or sulfur, M represents oxygen or sulfur, R¬1 represents alkyl, alkenyl, alkoxyalkyl, alkylthioalkyl or polyalkoxyalky, each of which is optionally substituted by halogen, or cycloalkyl which is able to be isolated by at least one hetero atom and optionally substituted by halogen, alkyl or alkoxy, or each optionally substituted phenyl, phenylalkyl, het-aryl, phenoxyalkyl or het-aryloxy, R¬2 represents alkyl, alkenyl, alkoxyalkyl or polyalkoxyalky, each of which is optionally substituted by halogen, or each optionally substituted cycloalkyl, phenyl or benzyl, R¬3, R¬5 and R¬5 independently represent alkyl, alkoxy, alklyamino, dialkylamino, alkylthio, alkenylthio or cycloalkylthio, each of which is substituted by halogen, or each optionally substituted phenyl, benzyl, phenoxy or phenylthio, and R¬6 and R¬7 independently represent hydrogen, or alkyl, cycloalkyl, alkenyl, alkoxy or alkoxyalkyl, each of which is substituted by halogen, or optionally substituted phenyl, or optionally substituted benzyl, or optionally oxygen or sulfur containing ring with a bonded nitrogen atom.
Patent KR-20000048797-A (KR)
Title: Interstitial sector system
Inventor: DENT PAUL W
IPC: H04W16/28
Filed: 1997-10-07
Abstract: PURPOSE: An interstitial sector system is provided to improve the reception characteristics for lower-power portable telephone units at a base station site. CONSTITUTION: A normal three-sector antenna site (8) is divided into a plurality of sectors each having a central line of focus. The frequency channels assigned to the base station site (8) are divided among the sectors, and an antenna (10) within each sector radiates the assigned frequencies along the central line of focus for each of the sectors.
Patent KR-20000069202-A (KR)
IPC: G11C16/30
Filed: 1997-09-23
Abstract: The invention relates to a circuit for generating negative voltages, comprising a first transistor (Tx2), the first terminal of which is connected to an input terminal (E) and the second terminal of which is connected to an output terminal (A) of the circuit, and the gate terminal of which is connected to a first clock pulse terminal via a first capacitor (Cb2). The circuit further comprises a second transistor (Ty2), the first terminal of which is connected to the gate terminal of the first transistor (Tx2), the second terminal of which is connected to the second terminal of the first transistor (Tx2), and the gate terminal of which is connected to the first terminal of the first transistor (Tx2). In addition, the circuit comprises a second capacitor (Cp2), the first terminal of which is connected to the second terminal of the first transistor (Tx2) and the second terminal of which is connected to a second clock pulse terminal. The transistors (Tx2, Ty2) are MOS transistors configured in a triple-well structure. The first terminal of a third transistor (Tz2) is connected to the second terminal of the first transistor (Tx2), the second terminal of said third transistor (Tz2) is connected to the trough(s) (Kw) housing the transistors (Tx2, Ty2, Tz2), and the gate terminal of the third transistor (Tz2) is connected to the first terminal of the first transistor (Tx2).
Patent KR-20000071212-A (KR)
Title: 밸브 작동기구
IPC: F01L13/00
Filed: 1998-02-17
Abstract: 밸브(12)를  작동시키기  위한  본발명의  작동기구(10)는  그  축선(42)을 중심으로  하여  회전가능하게  착설된  캠(40),  상기  밸브를  작동시키기  위하여  이동할  수  있는  접속면(70)을  갖는  로커(50)와,  회전운동을  위하여  착설된  종동자(80)로  구성된다.         종동자(80)는  로커(50)와의  접촉점을  가짐으로서  종동자가  회전시  로커가  회전하여  밸브(12)가  작동할  수  있게 되어 있다.        또한  본  발명  작동기구는  캠의  축선(42)과  로커(50)의  축선(52)에 대하여 종동자(80)의 축선(82)을 이동시켜 캠과 종동자사이의 접촉점을 이동시키고  캠의  회전에  대하여  밸브의  작동타이밍을  변경시킬  수  있도록 작동하는  조절수단으로  구성된다.
Patent KR-20010006399-A (KR)
Title: 무전해 도금용 접착제, 무전해 도금용 접착제 조제용의 원료조성물 및 프린트 배선판
IPC: H05K3/38
Filed: 1998-04-15
Abstract: 실용적인 피일강도를 유지하여 땜납 층간의 절연신뢰성을 확보하는데 유리한 무전해 도금용 접착제와, 프린트 배선판을 제공하는 것을 목적으로하고, 경화처리에 의하여 산 또는 산화제에 난용성으로 되는 미경화의 내열성 수지 매트릭스중에 산 또는 산화제에 가용성의 경화처리된 내열성 수지입자를 분산하여 이루어지는 무전해 도금용 접착제에 있어서, 상기 내열성 수지입자가 그 평균입경이 1.5μm 이하인 것을 특징으로 하는 무전해 도금용 접착제와, 이 접착제를 사용한 프린트 배선판을 제공한다.
Patent KR-20010013079-A (KR)
Inventor: BERGET JOHN ARVE
IPC: E02B3/20
Filed: 1998-05-26
Abstract: Double mooring bollard (1) of the contra rotating, mechanically driven type, preferably intended for ship and offshore installations. The mooring bollard (1) includes fixed first and second mooring bollards (3, 3), a motor (4) provided inside at least one of the mooring bollards (3, 3) and with a driving axle (5) centrically provided inside at least one of the bollards (3, 3), outer cylinders (2) rotatably provided on the outside of the first and second mooring bollards (3) and with an upper end arranged for coupling to the driving axle (5).
Patent KR-20010014006-A (KR)
Inventor: HARDING VALERIE DENISE
IPC: A61K47/40
Filed: 1998-06-02
Abstract: The invention provides a pharmaceutical formulation comprising voriconazole, or a pharmaceutically acceptable derivative thereof, and a cyclodextrin derivative of formula (I), wherein R1a-g, R2a- gand R3a-gindependently represent OH or O(CH2)4SO3H; or a pharmaceutically acceptable salt thereof.
Patent KR-20010073293-A (KR)
Title: Photo-resist flow meter check system
Inventor: KIM SEON GYU
IPC: G03F7/004
Filed: 2000-01-13
Abstract: PURPOSE: A photoresist flow meter check system is provided to prevent error generation of process caused by the flow rate out of defined values by arranging a mass flow check device on a route for the fluid from photoresist container to injection device of the process. CONSTITUTION: The check system comprises a switch valve positioned on a route for the movement of the photoresist fluid; a check gauge to receive the photoresist through the switch valve and to measure flow rate of the photoresist; and a device to generate error signals in case the result of flow measurement from the check gauge is out of a defined range. The system operates to receive the error signals and to hold the progress of the working process in response to the signals. The photoresist supplying apparatus comprises a photoresist container (20), an injector (25), a pump (21), a pressure valve (22) and an intake valve (24) arranged in order.
Patent KR-20000062509-A (KR)
Title: 고속 독출동작이 가능한 반도체 기억장치
IPC: G11C16/04
Filed: 2000-01-28
Abstract: 반도체 기억장치가  메모리셀매트릭스부, 기준메모리셀매트릭스부 및 센스회로를 포함한다.     상기 메모리셀매트릭스부는  제1 매트릭스에 배치된 메모리셀들을 포함한다.     메모리 셀들 중의 하나가 어드레스신호에 기초하여 선택되면,  이 선택된 메모리 셀의 저장데이터에 대응하는 독출데이터신호가 출력된다.     상기 기준메모리셀매트릭스부는  제2 매트릭스에 배치된 기준메모리셀들을 포함하며,  선택메모리셀로부터의 독출데이터신호에 대한 기준데이터신호를 출력한다.     상기 센스회로는  메모리셀매트릭스부로부터의 독출데이터신호와 기준메모리셀매트릭스부로부터의 기준데이터신호에 기초하여 저장데이터를 판정한다.     이 때,  기준메모리셀매트릭스부는,  기준데이터신호가 데이터독출신호와 거의 동기되도록 보이게, 기준데이터신호를 센스회로에 출력한다.
Patent KR-20010076831-A (KR)
Title: Recharger for fabricating semiconductor
Inventor: KIM JAE WON
IPC: H01L21/304
Filed: 2000-01-28
Abstract: PURPOSE: A liquid concentrating apparatus for manufacturing a semiconductor is provided to prevent a fail in filling up a liquid and reduce filling-up time . CONSTITUTION: The liquid concentrating apparatus includes a liquid concentration tank(108), a filters(103a,103b), a pressure member and a detector and a ventilator. The liquid concentration tank contains the liquid which is to be concentrated in the tank. The filter is implemented between the tank and a pipe between the tank and filters the liquid which is to be concentrated. The pressure member is coupled with the liquid concentrating tank by way of pipes, supplies nitrogen gas at high pressure in order to enable the liquid to drifted to the tank by the nitrogen pressure. The detector is coupled with the pipe of the pressure and detects the output pressure of the nitrogen which is ventilated from the liquid concentration tank or a pressure malfunction of the nitrogen gas. The ventilator is coupled with the pipe of the pressure and ventilates the nitrogen when the pressure is detected to be higher than a predetermined value or to main the inward pressure of the tank by ventilating the nitrogen gas.
Patent KR-20000036254-A (KR)
Inventor: SHIN CHAN SU
IPC: A47B9/08
Filed: 2000-02-07
Abstract: PURPOSE: A height-adjuster of a desk and a chair is attached to current desks and chairs, thereby simply providing height-adjustable desks and chairs to individuals' physical condition. CONSTITUTION: A height-adjuster of a desk and a chair is composed of; forming a key (12) inside a leg fixing pipe (10) in which a control hole (11) is punched, for inserting and fixing a leg of a desk or a chair; punching many control holes (16) horizontally to a fistulous height-adjusting pipe (14), inserted into a control hole (11); putting a supporting cap (15) to the lower part of a height-adjusting pipe (14) and a wrinkle drubber (17) to lower part of a supporting cap (15); inserting a bolt (18) through a fixed hole(13) on a leg fixing pipe(10) and a control hole(16) on a height-adjusting pipe(14) and fixing by a nut(19). Therefore, it is possible to get the same effect as replacing with new height adjustable desks and chairs, by simply attaching to current desks and chairs and adjusting height of a desk and a chair with a low cost.
Patent KR-20010083293-A (KR)
Title: Device and method for watching call process impossible status of intelligent peripheral
Inventor: KIM JIN YEONG
IPC: G06F11/00
Filed: 2000-02-10
Abstract: PURPOSE: A device and method for sensing a call processing impossible state in an intelligent type peripheral device is provided to enhance the reliability of a system status management function by managing a status of a call processing processor, thereby informing a call processing impossible status to a trouble processor and to an operator in sensing the call processing impossible status. CONSTITUTION: A call processor(100) transmits a call processing of a mobile member and progressing status information thereto. A shared memory(200) receives and stores call processing progress status information transmitted from the call processor(100). A status managing processor(300) checks call processing progress status of the call processor(100) being stored in the shared memory(200) and transmits information with respect to a malfunction or not in accordance with a call processing status. A trouble processor(400) receives the information with respect to malfunction or not in accordance with a call processing status transmitted from the status managing processor(300), and informs the status to an operator if a malfunction is generated.
Patent KR-20010081201-A (KR)
Inventor: IM HEON HO
IPC: A01B3/36
Filed: 2000-02-11
Abstract: PURPOSE: A plow for a tractor is provided to enable the adjustment of a connection angle between the plow and the tractor, and to freely control the width of furrows by easily changing the distance between plowshares. CONSTITUTION: The plow for a tractor comprises a frame integrated to the tip end of a connection bar for the tractor, a transverse bar(105) fastened to the tip end of a connecting member of the frame by a bolt, and a plow-share(107) located on a lower end of a plow-share strut(106) coupled to the transverse bar. A bracket(110) is rotatively coupled to an upper end of the plow-share strut with a connecting pin(109), and the bracket is coupled to the transverse bar with a desired fastening device. An adjustment screw(112) is screwed to an inclined surface(111) of the bracket so that the adjustment screw is advanced or withdrawn according to the rotating direction of the bracket. A fastening pin(113) of the plow-share support is moved along a groove(114) formed in the bracket in order to fix the position of the plow-share support tilting according to the movement of the adjustment screw.
Patent KR-20010081613-A (KR)
Title: Dividing apparatus of laser beam
Inventor: LEE DONG GI
IPC: G02B27/09
Filed: 2000-02-17
Abstract: PURPOSE: A laser beam dividing apparatus is provided to avoid additional installation of an optical feature compensating device by maintaining optical distances of two divided laser beams with the first to third mirrors. CONSTITUTION: The first mirror(101) divides a laser beam(100) incident along the first direction into the divided first beam(100a) to transmit the first divided beam and the divided second beam(100b) to be reflected along a direction inclined at an angle about the incidence direction of the laser beam(100). The second mirror(102) reflects the divided first beam(100a) transmitted from the first mirror(101) to the second direction perpendicular to the first direction. The third mirror(103) reflects the divided second beam(100b) reflected from the first mirror(101) to a direction parallel to the second direction. An arbitrary line(300) is defined perpendicular to propagating paths of the divided first and second beams(100a,100b). The optical distance(L1,L2) of the first beam(100a) from the first mirror(101) to the arbitrary line(300) is the same as that(L3,L4) of the second beam(100b) from the first mirror(101) to the arbitrary line(300).
Patent KR-20010087929-A (KR)
Title: Method For Substituting Automatic Each Person Report Of Internet
Inventor: LEE SU IL
IPC: H04L12/12
Filed: 2000-03-09
Abstract: PURPOSE: A method for automatically substituting personal information on the Internet is provided to simply input personal information by one-click by storing personal information in a personal information automatic substitution program and automatically substituting personal information when applying for membership on various web sites. CONSTITUTION: If a user executes a personal information automatic substitution program, inputs personal information according to an input format displayed on a screen, and selects a completion key, inputted personal information is stored in a storage space of an Internet connection terminal(ST3,ST4). If the user selects a member entrance window of a corresponding site(ST5) and clicks the personal information automatic substitution program(ST6), previously stored personal information is automatically inputted in a member information input column of the corresponding site. If the user clicks a member information input completion key of the corresponding site, the application of membership is completed(ST7). If a specific error occurs when automatically substituting personal information of the user, an error message is displayed and the user directly corrects the error(ST8).
Patent KR-20000036949-A (KR)
Inventor: KIM WON TAE
IPC: B42D15/02
Filed: 2000-03-29
Abstract: PURPOSE: A floppy disk name card is provided to easily deliver mass information and of which the space is provided to be optionally used by a user. CONSTITUTION: A floppy disk is substituted for a name card by attaching the name card on the disk and stores a product catalog in the dick. The disk is reusable after that. Also, the floppy disk is informed of the name well instead of the name card so as to be used by a salesman.
Patent KR-20010094204-A (KR)
Title: Control device and method for stand-by state in monitor using camera
Inventor: SUK SANG MUN
IPC: G06F11/30
Filed: 2000-04-04
Abstract: PURPOSE: A device and method for controlling a waiting status of a monitor using a camera are provided to supply a preferable PC environment to a user by checking an existence of a user using image data of a frame unit scanned using the camera and controlling an insertion to a power saving mode or a screen saver condition in accordance with the checking result. CONSTITUTION: A camera(201) scans image data to motion information of a user. A monitor micro computer(202) outputs the scanned motion information through a PSD line(picture sampling data line) by sampling the scanned motion information, and controls a conversion of the monitor status in accordance with an input of a power saving mode or a screen saver signal through the PSD line. A PC micro computer(203) is connected with the monitor micro computer(202) through a PSD line(206) and receives sampling data and compares the data and outputs a saving mode or a screen saver control signal to the monitor micro computer(202) in accordance with the comparing result. A memory(204) stores sampling image data being inputted to the PC micro computer(203).
Patent KR-20010094342-A (KR)
Title: Thin film deposition apparatus and the method
Inventor: HYUN GWANG SU
IPC: H01L21/205
Filed: 2000-04-06
Abstract: PURPOSE: A thin film deposition apparatus is provided to supply liquid source with constant flow rate to the chamber. CONSTITUTION: The deposition apparatus comprises a reaction chamber(40), a source supplier(20) for supplying vaporized liquid sources into the reaction chamber(40), a source tranportation line(21) for flowing a gas source to form between the source supplier(20) and the reaction chamber(40), and an exhaust unit(50). The source supplier(20) further includes a heater(22) and a temperature controller(23). The interior pressure of the reaction chamber(40) is lower than the vapor pressure of the gas source. Thereby, the gas source is carried to the reaction chamber(40) by the difference of the pressure.
Patent KR-20000071607-A (KR)
IPC: C08F10/00
Filed: 2000-04-07
Abstract: 본 발명은 윤활유 첨가제로서 우수한 특성을 나타내며, 각종 관능기를 고비율로 도입할 수 있으며, 또 각종 상용화제용 원료로서 사용가능한 특정 구조의 에틸렌/α-올레핀 공중합체를 제공하려는 것이다. 
     본 발명의 에틸렌/α-올레핀 공중합체는 에틸렌과 탄소수 3~10의 α-올레핀으로 구성되며, 특정 특성을 나타낸다.
Patent KR-20010096856-A (KR)
Title: 오실레이터 회로
Inventor: SON JEONG HO
IPC: H03K3/011
Filed: 2000-04-15
Abstract: 본 발명은 오실레이터 회로에 대하여 기술된다. 오실레이터 회로는 전원전압의 변화에 대하여 이를 감지·보상하는 전원전압 감지 회로부와 전원전압 보상 회로부, 온도변화에 대하여 이를 보상하는 온도보상 기준전압 발생 회로부, 그리고 반도체 제조 공정 변화에 대하여 이를 보상하는 공정변화 보상 회로부를 포함하고, 발진 회로부를 통하여 일정한 주파수의 발진신호(fout)를 발생한다. 전원전압 감지 회로부는 전원전압의 레벨을 감지하고 전달 특성상 서로 다른 스위칭 포인트를 갖는 다수개의 인버터 체인들에 의하여 스위칭 제어 신호 발생한다. 온도보상 기준전압 발생 회로부는 서로 반대의 온도계수를 갖는 소자들을 이용하여 소정의 기준전압을 발생한다. 공정변화 보상 회로부는 발진 회로부 내에  병렬연결되는 다수개의 트리밍단을 구비한다. 따라서, 본 발명의 오실레이터 회로는 전원전압 변화, 온도의 변화 및 반도체 제조 공정 변화가 있더라도 안정적인 발진신호를 발생시킨다.
Patent KR-20010096035-A (KR)
Title: Internet phone with a direct dialing function and method thereof
Inventor: CHOI JEONG YUN
IPC: H04L12/66
Filed: 2000-04-17
Abstract: PURPOSE: An Internet telephony system having a direct dialing function and a method for operating the same are provided to seek convenience in use by enabling a user to directly execute dialing in the same manner as a generic telephone, without the necessity of operating a PC. CONSTITUTION: An Internet telephony system having a direct dialing function consists of a communication program(21) and an Internet telephone(20). The communication program(21), installed in a PC, executes communication control processing. The Internet telephone(20) is comprised of an interface module(11), a control module(12), an A/D conversion module(13), a keypad module(14), a hook switch module(15) and a handset(16). The interface module(11), connected to the PC, executes interfacing. The control module(12) checks the key input of the keypad module(14) according to the hook on/off state of the hook switch module(15) and executes control operations so that signal conversion can be carried out by the A/D conversion module(13). The A/D conversion module(13) converts a voice signal to transmit into digital voice data and received voice data into an analog voice signal. The keypad module(14) is composed of a plurality of keys corresponding to numbers, Hangul consonants or the alphabet. The hook switch module(15) supplies a call request signal and a call end signal to the control module(12). The handset(16) converts the analog voice signal supplied from the AD conversion module(13) into an audible sound and provides it to the user. Also the handset(16) converts the user's voice into an analog electric signal and supplies it to the A/D conversion module(13).
Patent KR-20010049281-A (KR)
Inventor: FUJIMOTO TAKUYA
IPC: G10K11/16
Filed: 2000-04-22
Abstract: PURPOSE: A sound-absorbing structure is provided to comply with such a request that a sound-absorbing performance in a low zone is enhanced by constituting the front surface plate of a platelike or planar sound-absorbing material and forming a back side air layer and a resonance-absorbing structure constituted of slits at the back of the sound-absorbing material. CONSTITUTION: A sound-absorbing panel(1) consists of a bottom plate(3), right and left side plates(4) and both end plates(5) which are made of a non-air permeable material, and the rear one surface plate made of a sound-absorbing material(6) that a metallic fiber is compression-molded to have a platelike shape. A back side air layer(7) of the sound-absorbing material(6) and a resonance-absorbing structure(8) consisted of slits are provided inside the sound-absorbing panel(1). The resonance-absorbing structure(8) has a sound-absorbing action in a resonance frequency decided by the dimensions and shape of the gaps, the volume of the resonance space(12), acoustic resistance of the sound-absorbing material(6), etc. It has a high sound-absorbing performance owing to the combination of back side air layer(7) made of a metallic fiber and the resonance-absorbing structure(8) and has no useless structure and it is lightweight. Further, it has advantages such as simple execution and low cost.
Patent KR-20010097571-A (KR)
Inventor: YEOM PYEONG SAM
Filed: 2000-04-24
Abstract: 본 발명은 오프라인에서 제공되는 동영상 광고 또는 영화 등을 편집하거나 흥미를 유발할 수 있는 새로운 광고 형태를 삽입하여 이를 인터넷상에 띄워 소비자로 하여금 지겹지 아니하게 광고를 시청하게 하고 광고내용에 대하여 다양한 형태의 퀴즈로서 광고의 내용을 숙지할 수 있도록 하는 광고방법에 관한 것으로서, 인터넷 사용자인 소비자로 하여금 광고에 대한 흥미를 유발시켜 광고효과를 극대화 하기 위하여 오프라인상에서 제공되는 제품 또는 회사의 광고영화(CF, Commercial Film), 드라마 또는 영화 등의 동영상을 이용하여 상기 동영상에 피피엘(PPL, Product PLacement)기법에 의하는 새로운 이미지, 음악 또는 메시지 등을 삽입하고 기존의 광고 동영상을 편집하여 소비자에게 익숙한 기존의 동영상과 더불어 상기의 새로운 이미지 등이 삽입된 동영상을 인터넷상에서 시청하게 하고, 이러한 새로운 동영상과 광고에 대한 퀴즈를 제시하여 광고의 효과를 높일 수 있는 인터넷상에서의 광고방법을 제공하는 것을 특징으로 한다.
Patent KR-20000077255-A (KR)
Title: 광 자기 기록 장치 및 방법
IPC: G11B11/10
Filed: 2000-05-13
Abstract: 펄스화된 레이저 광을 재생하기 위한 레이저 구동 신호(LD)의 상승과, 자계를 생성하기 위한 자기 헤드 구동 신호(MD)의 하강과의 위상차 δ를 변화시켜 소정 길이의 자구를 광 자기 기록 매체(1)에 형성하고, 그 형성된 자구를 재생하여 얻은 재생 신호의 에러 레이트로부터 위상차 최적화 회로(13)가 에러 레이트가 최저가 되는 최적 위상차 δ OP 를 검출한다.  그리고, 검출된 최적 위상차 δ OP 에 기초하여 기록 신호에 따라 변조된 자계를 생성하기 위한 자기 헤드 구동 신호(MD)를 새롭게 생성하고, 그 생성된 자기 헤드 구동 신호(MD)와, 최초의 레이저 구동 신호(LD)에 기초하여 자계를 광 자기 기록 매체(1)에 인가하고, 또한 펄스화된 레이저 광을 광 자기 기록 매체(1)에 조사하여 신호를 기록한다.