baber/WOPTO huggingface dataset:
Patent KR-20010048573-A (KR)
Inventor: LEE MYUNG CHUN
IPC: H01F41/04
Filed: 1999-11-27
Abstract: PURPOSE: An electromagnet of multiple plates is provided to increase the magnetic force and the moving distance of the iron core without increasing the size and power consumption of the electromagnetic by dividing the iron core into several sub cores and thus maintaining the powerful magnetic force while the iron core is pulled by the driving force of the exciting coil. CONSTITUTION: In the electromagnet, the iron core is divided into several sub cores(11-13). A fixing axial is formed on the sub core(11) to move the neighboring sub core(12) for a set distance. An operating axial(14) is formed on the last sub core(13) along the fixing axial of the neighboring sub core(12). The iron core forms an electromagnet(20) within the exciting coil(15). Here, the fixing axial makes a limited movement within the connection halls. And when the current flows into the exciting coil(15), the induced magnetism pulls the first sub-core(11), which, in turn, pulls the second and third sub cores(12,13).
Patent KR-20010053742-A (KR)
Inventor: JUNG RIM HO
IPC: C21D9/40
Filed: 1999-12-01
Abstract: PURPOSE: A method for manufacturing a synchronizer ring for a manual transmission is provided which not only reduces a process such as carburizing heat treatment, thereby reducing costs but also easily manufactures the synchronizer ring by heat treating the tooth profile part only through high frequency waves in the heat treatment process, thereby heat treating the area only that substantially requires abrasion resistance and rigidity. CONSTITUTION: The method comprises the processes of a heat treatment process in which tempering is performed at a temperature of 140 to 160 deg.C for 1.5 to 2 hours after removing stress at a temperature of 400 to 500 deg.C for 2 to 4 hours and performing high frequency heat treatment on the tooth profile part at a temperature of 800 to 850 deg.C for 10 to 15 seconds; and cooling process in which cooling is carried out using cooling water containing 15 to 20 wt.% of a water soluble oil, wherein the high frequency heat treatment is a method in which a material treated is heated by induced current.
Patent KR-20000062179-A (KR)
Title: 고속 레이턴시를 위해 짧은 랜덤 액세스 채널 프레임들을제공하는 방법 및 장치
IPC: A61F5/03
Filed: 1999-12-02
Abstract: 본 발명은 개선된 RACH 액세스 버스트 정렬 및 프레임 구조를 제공한다. 즉, 본 발명은 UMTS 액세스 채널 구조내의 1개 이상의 액세스 버스트 길이를 지원하기 위한 방법 및 장치를 제공한다. 양호하게, 두개의 액세스 버스트 길이들, 예를 들어, 5 밀리초 및 10 밀리초가 지원된다. 이러한 정렬은 예를 들어, 음성 또는 다른 형태의 실시간 트래픽등의 고속 액세스 레이턴시를 갖는 것이 유익한 응용들에서 유리하다. 또한, 본 발명은 다중 프레임 크기들을 지원하기 위한 방법 및 장치를 제공한다. 액세스 레이턴시에 대한 추가의 증대는 UMTS 물리층 지원 복수 프레임 크기들을 가짐으로써 얻어질수 있다. RACH가 UMTS 짧은 메시지 서비스들을 위해 활용되는 경우에 RACH 를 통해 원격 단말기에 의해 전송된 액세스 버스트 신호는 액세스 요구 또는 데이터 패킷들일 것이다.
Patent KR-20010057073-A (KR)
Title: Orchid pot and flower pot, in which air circulation water tank is laid
Inventor: WHING DUK HYUN
IPC: A01G9/02
Filed: 1999-12-17
Abstract: PURPOSE: An orchid pot and a flower pot, in which an air circulation water tank is laid, are provided to make the function of air circulation to maximum and to make the use convenient by manufacturing the upper body and the lower water tank as a body. CONSTITUTION: The orchid pot and the flower pot, in which the air circulation water tank include an air circulation route(1), the water(2), an upper body(3), a lower water tank(4), a water entrance/exit(5), a water tank(6), a bridge(7) and an air circulation hole(8). The air circulation route(1) makes the space between the upper body(3) and the lower water tank(4) and makes the circulation of the air smooth. The water tank(6) prevents the outflow of water and supplies water to the inside of the flower pot. The air circulation hole(8) goes through the surface of the lower water and thereby discharging and air circulation are carried out at the same time.
Patent KR-20010057192-A (KR)
Inventor: HWANG GEUN JAE
IPC: F24C15/08
Filed: 1999-12-20
Abstract: PURPOSE: A bottom plate supporting structure for an electric equipment chamber of a microwave oven is provided to firmly support a bottom plate of a cavity when the fixation of the bottom plate of the cavity on the front face of a cavity assembly is impossible. CONSTITUTION: In bottom plate supporting structure, a reinforcing bracket(32) is fixed on a bottom plate(30) of a microwave oven along the front and rear sides of the microwave oven. An electrical chamber bottom plate(20) has a side end portion(20a) adhered to the reinforcing bracket. The side end portion and the reinforcing bracket are fixed with a fixing screw(S). By supporting the bottom plate of an electric equipment chamber with the reinforcing bracket fixed on a portion excepting the front face of a cavity assembly, the structural change of the front face of the microwave oven becomes possible.
Patent KR-20010065180-A (KR)
Inventor: CHO HO JIN
IPC: H01L21/3205
Filed: 1999-12-29
Abstract: PURPOSE: A method for forming a capacitor of a semiconductor device is provided to improve the uniformity of the composition of a titanium in a wafer using N2O and the characteristic of the BST film using UV/O2 treatment when a BST film is formed. CONSTITUTION: The method includes four steps. The first step is to form the lower electrode(12) on a substrate(11) on which a lower structure is formed. The second step is to form a dielectric film(13) by depositing a BST film on the lower electrode with a CVD(Chemical Vapor Deposition)method using N2O as an oxidizer. The third step is to sequentially perform a low temperature thermal treatment process and a high temperature thermal treatment process after depositing the BST thin film. The fourth step is to form the upper electrode on the dielectric film.
Patent KR-20010058546-A (KR)
Inventor: JUNG YANG GYU
IPC: H04L47/80
Filed: 1999-12-30
Abstract: PURPOSE: A resource management structure in an ATM switching system and a method thereof are provided to perform a resource management by changing only a system-subordinate portion of a system even through a hardware characteristic of a switching system is changed by processing an allocated/released resource by calling a sub-block which separately implements the system-subordinate portion adopted to an actual hardware. CONSTITUTION: A resource management processor(10) generates a child process by messages according to a type of message transmitted from a GSMP control block. If a received message is related to a connection management, the resource management processor(10) generates a connection management processor(20), while if a received message is related to a configuration, state or statistics, the resource management processor(10) generates a statistics management processor(30). The resource management processor includes a resource management initializing routine(11) and a resource management performing routine(12). The connection management processor(20) performs a call set-up and release function, and includes a logical connection management routine(21) for processing a system-independent portion related to a connection management and a physical connection management routine(22) for processing a system-subordinate portion. The construction statistics management processor(30) updates configuration information of a local construction database when receiving a message informing of a change of confirmation information or state information, reads cell count information of a port from an input module when receiving a message requesting statistics information and transmits it to the GSMP control block, and includes a configuration management routine(31), a state management routine(32) and a statistics management routine(33).
Patent KR-20010066221-A (KR)
Inventor: KO YEONG JIN
IPC: G01N1/00
Filed: 1999-12-31
Abstract: PURPOSE: A rapid cooling system for sampling picking is provided to precisely and easily observe a solid phase ratio in a Rheo-forming process and manufacture a steel welding product of a real shape by a single injection molding with a mechanical property similar to a forge product. CONSTITUTION: In a rapid cooling system for sample picking, a predetermined amount of cooling water is supplied primarily directly into a crucible including a sample piece(40) by using a crucible(30) and a cooling water supply pipe while a rotation stirrer rod(20) is raised, recovering the water in the crucible by a cooling water recovering pipe and a pump element(60) after about 2-3 seconds for removing the heat from the sample piece by the cooling water, and the same amount of the cooling water is supplied and recovered in the same manner by three times or more.
Patent KR-20010060016-A (KR)
Inventor: KIM CHUL KI
IPC: G06F17/22
Filed: 1999-12-31
Abstract: PURPOSE: A method for granting and inputting a member ID is provided to prevent waste of network resources by collectively granting an ID to each member using a member number given by a company according to a date of birth and a membership procedure. CONSTITUTION: A web server which receives information including a date of birth or a registration number of an applicant for membership displays a member ID on a computer screen. The applicant for membership clicks a button. A procedure for becoming a member and registering the member ID is completed. The member ID given to the member from a relevant company is collectively given to the member in order according to an entrance order. It prevents waste of time and communication resources according as an ID is selected and duplicated that the ID is collectively given to each member.
Patent KR-20000068523-A (KR)
Title: 열가소성 수지필름의 제조방법 및 제조장치
IPC: B29C39/38
Filed: 1998-07-09
Abstract: 본 발명은, 2축연신 폴리에스테르필름의 제막속도로서 400m/분 이상의 고속으로 제막하는 것을 가능하게 하는 열가소성 수지필름의 제조방법과 장치를 제공한다. 
     본 발명이 방법은, 용융 열가소성 수지필름을 냉각매체상에 밀착냉각고화시켜서 캐스트필름을 제조하는 방법에 있어서, 용융체의 접지직전의 매체의 표면온도가 열가소성 수지의 글래스 전이온도(Tg) 이상, 융점(Tm) 이하로 유지되어 있는 것을 특징으로 하는 열가소성 수지필름의 제조방법이다. 또, 본 발명의 장치는, 용융체의 접지직전의 매체의 표면온도가 열가소성 수지의 글래스 전이온도(Tg) 이상, 융점(Tm) 이하이고, 또한 박리직전의 매체의 표면온도가 열가소성 수지의 글래스 전이온도(Tg) 미만으로 유지되도록 냉각매체에 가열장치와 냉각장치를 보유하는 열가소성 수지필름의 제조장치이다.
Patent KR-20000069175-A (KR)
Title: 무선 통신 방법 및 무선 통신 장치
IPC: H04L12/28
Filed: 1998-09-30
Abstract: 본 발명은 무선 네트워크 (wireless network)내에 놓여있는 다수의 노드 (node) 사이에서 데이터를 전달하는 무선 통신 (radio communication) 장치 등에 관한 것이다.  무선 통신 장치는 하나의 제어 노드와 그 제어 코드에 의해 제어되는 하나 이상의 제어되는 노드를 구비한다.  제어 블록은 각 125 μsec 싸이클의 헤드에서 제어 노드로부터 송신된다.  제어되는 노드 각각은 제어 블록을 참고하여 제어 노드의 전달 클럭 신호와 자체 전달 클럭 신호를 동기화하는 처리를 실행한다.  또한, 제어 노드는 각 노드의 송신을 제어한다.  연속적인 각 싸이클내에는 다수의 시간 슬롯 (time slot)이 제공된다.  고정된 길이의 데이터 블록이 소정의 시간 슬롯을 사용해 각 노드 사이에서 전달된다.  송신 노드 사이에서 스위칭의 순간성이 보장될 수 있어, 고속 시리얼 버스의 데이터 전달이 무선 형태로 주어질 수 있다.
Patent KR-20000069183-A (KR)
Title: 윤활 조성물 및 이로부터 제조된 자기 기록 매체
IPC: G11B5/725
Filed: 1998-09-29
Abstract: 본 발명은 하기 (A) 및 (B) 를 함유하고, 주행 안정성, 정지 수명 및 내후성이 우수한 자기 기록 매체내 윤활층을 제공하는 윤활 조성물에 관한 것이다: 
     (A) 하기 화학식 [1] 의 화합물: 
     [화학식 1] 
     R 1 - COO - R 2 [1] 
     [식중, R 1 은 고급 지방족 탄화수소 잔기이고; R 2 는 불소 원자 또는 산소 원자를 가질 수 있는 지방족 탄화수소 잔기이다], 및 
     (B) 하기 화학식 [2] 의 화합물: 
     [화학식 2] 
     
       
     
     [식중, R 3 은 고급 지방족 탄화수소 잔기이고; R 4 및 R 5 는 독립적으로 수소 원자, 또는 불소 원자 또는 산소 원자를 가질 수 있는 지방족 탄화수소 잔기이다].
Patent KR-20000057422-A (KR)
Title: Binder for rechargeable battery with nonaqueous electrolyte and battery electrode depolarizing mix prepared using the same
Inventor: HIGASHIHATA YOSHIHIDE
IPC: H01M10/0525
Filed: 1997-10-06
Abstract: PURPOSE: A binder for rechargeable battery with nonaqueous electrolyte and battery electrode depolarizing mix prepared using the same is provided to have a binder for secondary battery using non-aqueous electrolyte which is soluble in usual organic solvents, does not swell in a non-aqueous electrolyte and besides enhances battery performance. CONSTITUTION: A binder for rechargeable battery with nonaqueous electrolyte and battery electrode depolarizing mix prepared using the same is composed of a copolymer comprising 50 to 80 % by mole of vinylidene fluoride, 17 to 50 % by mole of tetrafluoroethylene and less than 3 % by mole of a monomer copolymerizable therewith is used.
Patent KR-20000057678-A (KR)
Title: Polymeric processing system for producing ophthalmic lenses
Inventor: KOKONASKI WILLIAM
IPC: B29C35/08
Filed: 1997-12-19
Abstract: PURPOSE: Polymeric processing system for producing ophthalmic lenses is provided. CONSTITUTION: A lens making system for producing ophthalmic lenses using a combination of heat and light to polymerize a liquid resin has a personal computer-based architecture. Electronic ballasts modulate the light from a light source in the system. All of the cooling necessary for the system is provided by a cooling fan of the power supply of the system. A bar code-reading pen checks compatibility between materials and resin and ensures that appropriate cure cycles are activated, and a modem allows for remote accessing of the system to facilitate automatic reordering and inventory control of the system.
Patent KR-20000069809-A (KR)
Title: 다수의 개별 히트셀을 함유하는 가열팩
IPC: A61F/
Filed: 1997-12-17
Abstract: 본 발명은 가열되는 경우 연화되는 반강성 물질의 하나 이상의 연속층을 갖는 통합 구조를 포함하는 일회용 가열팩에 관한 것이다.     가열팩은 또한 다수의 개별 히트셀을 포함하고, 이것은 전형적으로 통합 구조 전반에 걸쳐 따로 분리되고 고정된 발열 조성물이다.     연속층의 물질은 충분한 강성을 제공하여 히트셀의 구조적 지지를 유지시키고, 가열팩의 가공 또는 사용동안 연속층 구조의 허용불가능한 인장을 방지하며, 히트셀 내용물에 용이한 접근을 방지하고, 또한 가열되는 경우 양호한 전체 드레이프 특성을 제공한다.     신체 랩, 패드 등에 편입되는 경우, 가열팩은 각종 신체 형태와 일치성이 우수한 유효하고 효과적인 열피복을 제공한다.
Patent KR-20000070437-A (KR)
Title: 인터류킨 및 ｔｎｆ의 억제제로서의 아미노벤조페논
IPC: A61P11/06
Filed: 1998-01-08
Abstract: 본 발명의 화합물은 화학식 I의 화합물이다. 
     화학식 I 
     
       
     
     위의 화학식 I에서, 
     R 1 및 R 2 는 독립적으로 수소, 할로겐, 하이드록시, 머캅토, 트리플루오로메틸, 아미노, 알킬, 알콕시, 알킬티오, 알킬아미노 및 알콕시카보닐(여기서, 알킬 및 알콕시의 탄소수는 1 내지 5일 수 있다)로 이루어진 그룹으로부터 선택된 하나 이상의 동일하거나 상이한 치환체이거나, 시아노, 카복시, 카바모일, 페닐 또는 니트로이고, 
     R 3 은 수소, 할로겐, 하이드록시, 머캅토, 트리플루오로메틸, 아미노, 알킬, 알콕시, 알킬티오, 알킬아미노, 알콕시카보닐(여기서, 알킬 및 알콕시의 탄소수는 1 내지 5일 수 있다), 페닐, 시아노, 카복시 또는 카바모일이고, 
     R 4 , R 5 및 R 6 은 독립적으로 수소, 트리플루오로메틸, 알킬, 카바모일, 알콕시카보닐 또는 알킬옥소(여기서, 알킬 및 알콕시의 탄소수는 1 내지 5일 수 있다)이고, 
     X는 산소, N-OH, N-O-알킬, 디알콕시, 사이클릭 디알콕시, 디알킬티오 또는 사이클릭 디알킬티오(여기서, 알킬 및 알콕시의 탄소수는 1 내지 5일 수 있다)이다. 
     본 발명의 화합물은 천식, 알러지, 류마티스성 관절염, 척추관절염, 통풍, 아테롬성경화증, 만성 염증성 장 질환, 증식성 및 염증성 피부 질환(예: 건선) 및 아토피성 피부염을 치료 및 예방하기 위한 전신 치료제 및 국소 치료제로서 사람 및 가축에게 매우 유용하다.
Patent KR-20000075850-A (KR)
Title: 유연성 보호슬리이브
IPC: B60R16/02
Filed: 1998-02-24
Abstract: 본  발명의  유연성  보호슬리이브(10)는  플라스틱  물질로  된  벽(12)으로  구성된다.          슬리이브의  벽에는  잡음감소용  플럭킹  층(16)이  접착되며,  이  플럭킹  층은  벽의  외면의  적어도  일부분(12a)에  도층된다.
Patent KR-20010005673-A (KR)
IPC: C04B18/02
Filed: 1997-03-26
Abstract: 본 발명은 왕겨재, 세라믹 클레이 바인더, 쌀겨, 및 박락제(剝落劑)를 포함하는 과립상 단열재료와 그 제조 방법에 관한 것이다.
Patent KR-20010013213-A (KR)
Inventor: RUCHTI DANIEL
IPC: B21K27/00
Filed: 1998-06-09
Abstract: The invention relates to a multistage metal-forming machine tool having a last metal-forming station which divides combined pieces into two finished pieces (21, 22), and two delivery devices (3, 4) for the finished pieces. Each delivery device (3, 4) is assigned a transfer device (6), which transfers a finished piece (21, 22) from the last forming station to the delivery device (3, 4). One of the transfer devices comprises transfer tongs having an upper claw with two clamping jaws (521, 522) and a lower claw with one clamping jaw (531). The other transfer device (6) has a slide way (61) for receiving a finished piece (22) from the last forming station, as well as a pivoting kick handle (62) for pushing a finished piece (22) situated on the slide way (61) to the delivery device (4).
Patent KR-20010013226-A (KR)
Inventor: LABY RON J
IPC: C12N1/21
Filed: 1998-05-28
Abstract: The present invention is directed to isolated fragments of an Erwiniahypersensitive response elicitor protein or polypeptide which fragments elicit a hypersensitive response in plants. Also disclosed are isolated DNA molecules which encode the Erwiniahypersensitive response eliciting fragment. Isolated fragments of hypersensitive response elicitor proteins or polypeptides, which elicit a hypersensitive response, and the isolated DNA molecules that encode them can be used to impart disease resistance to plants, to enhance plant growth, and/or to control insects on plants. This can be achieved by applying the hypersensitive response eliciting fragments in a non-infectious form to plants or plant seeds under conditions effective to impart disease resistance, to enhance plant growth, and/or to control insects on plants or plants grown from the plant seeds. Alternatively, transgenic plants or plant seeds transformed with a DNA molecule encoding a hypersensitive response eliciting fragment can be provided and the transgenic plants or plants resulting from the transgenic plant seeds are grown under conditions effective to impart disease resistance, to enhance plant growth, and/or to control insects on plants or plants grown from the plant seeds.
Patent KR-20010068602-A (KR)
Title: System for reporting the emergency situation
Inventor: KANG BYEONG DONG
IPC: H04M11/04
Filed: 2000-01-07
Abstract: PURPOSE: An emergency notifying system is provided to automatically notify an emergency center of correct physical location information and a telephone number of a caller when dialing an emergency telephone number. CONSTITUTION: A keyphone(100) dials to notify emergency. A keyphone exchange(200) decides a kind of a dialed signal, and performs telephone communication with an other party connected with a communication network according to a decided kind of dialing signal. An emergency notifying device(300) transmits pre-determined information on a caller to an emergency reception desk(400) connected with the communication network if the decided signal kind is an emergency notifying signal.
Patent KR-20010000069-A (KR)
Title: apparutus for illustrating book contents in sound
Inventor: SHIM HYUN BO
IPC: G09B5/06
Filed: 2000-01-08
Abstract: PURPOSE: A device for outputting contents of the books in voice is provided to automatically outputting the contents or a background music of corresponding page by a page sensing unit which automatically recognizes the page. CONSTITUTION: A device for outputting contents of the books in voice is composed of transmission, decode, and output. A database(600) transmits a page detector's(700) output signal to a micro controller's(100) input terminals(P1,P2,..,P12). A memory(300) stores each book's content as digital data file. A decoder(200) reads the contents stored in the memory and decodes the analog signals. An output device(400) outputs the signals that have been output by the decoder.
Patent KR-20010076016-A (KR)
Inventor: HAN HYO RIN
IPC: H01L23/495
Filed: 2000-01-24
Abstract: PURPOSE: A semiconductor assembly apparatus is provided to improve jamming phenomenon by linking moving blocks together. CONSTITUTION: The semiconductor assembly apparatus includes a rail fix block, the first guide rail(13) and the second guide rail(17). The first guide rail is coupled with the rail fix block with a shaft. The second guide rail is provided to contact the first guide rail. The apparatus according to the present invention further includes a ball bearing on both ends of the rail fix block. The apparatus further includes a trust bearing at a position where the first guide rail and the shaft of the rail fix block are assembled.
Patent KR-20000030251-A (KR)
Inventor: MIN DU SIK
IPC: A61K8/362
Filed: 2000-02-16
Abstract: PURPOSE: A composition for the prevention and treatment of dandruff is provided which comprises polyhexamethylenebiguaninidine salt. CONSTITUTION: A composition comprises polyhexamethylenebiguaninidine salt by itself, ora mixture of polyhexamethylenebiguaninidine salt and common dandruff-prevention components such as piroctone olamine, zinc pyrithione, diiodomethyl-p-tolylsufone, chlorophenoxyimidazolyldimethylbutanone, and iodopropynylbutylcarbamate. Polyhexamethylenebiguaninidine salt is represented as formula 1 wherein M is selected among phosphoric acid, hydrochloric acid, and sulfuric acid, and n is integer. Preferably 0.1-2.0 wt.% of polyhexamethylenebiguaninidine salts constitute the composition as a single component. 0.001-0.5 wt.% of polyhexamethylenebiguaninidine salt is sufficient for the prevention and treatment of dandruff when it is used as the mixture with one or more component among piroctone olamine, zinc pyrithione, diiodomethyl-p-tolylsufone, chlorophenoxyimidazolyldimethylbutanone, and iodopropynylbutylcarbamate.
Patent KR-20010084466-A (KR)
Title: robot soccer game method
Inventor: HAN GUK HYEON
IPC: A63F7/06
Filed: 2000-02-25
Abstract: PURPOSE: A method for playing a robot soccer game is provided, to allow a gamer to control robots directly during the game. CONSTITUTION: The method comprises the steps of inserting a coin; selecting the degree of difficulty of a game; lining robots in initial position automatically; placing a ball in the center of a soccer field; announcing the start of a game in an electrical score board; controlling the robots of my team whereas the robots of opposite team is controlled automatically; advancing the score of an electrical score board when a robot makes a goal and placing a ball in the center of a soccer field when the time is stopped; determining the winner and the defeated when the game is over; and putting a ball the robots into the four rooms placed beside of the goal post of my team automatically. The game can be played by two persons in different place by controlling robots in different soccer field through Internet.
Patent KR-20010091572-A (KR)
Title: Cross, game table and method for attaching the cross
Inventor: HAJIME DANAKKA
IPC: A63D15/02
Filed: 2000-03-16
Abstract: PURPOSE: A cross of a pool table and an attachment method of the cross are provided to easily replace, extend and attach a cross by applying a uniform tension to the entire part of a cross. CONSTITUTION: A cross(200) attached to the upper face of a pool table has at least one of matching steps(210) for the application of tension. The matching steps are for matching bar type members(215) in vertical to the application direction of tension. A matching part is formed on a pool table(100) to math an extension unit to the position where tension is applied to a cross. According to matching a part of the extension unit to the matching part, a uniform tension is applied to a part of the bar type member. For attaching a cross, a surface(101) is covered on the cross. An exposed part of the bar type member is mutually matched with the matching part of the pool table via an extension member(240).
Patent KR-20010090164-A (KR)
Title: High density optical storage medium
Inventor: KIM SEONG HUN
IPC: G11B7/24079
Filed: 2000-03-23
Abstract: PURPOSE: A high density optical recorder is provided to improve recording characteristic by decreasing dependence of an optical recorder of a substrate, including optical source, bending, double-refractive index, etc. CONSTITUTION: A groove and a land are formed on a substrate. A recording layer and a reflective film are consecutively laminated on the substrate. GW/LW which is a width ratio of the groove and the land is 1.5 to 3μm. A width of the groove is 0.18 to 0.3μm. A width of the land is 0.1 to 0.23μm. A depth of the groove is 50 to 150nm. A track pitch of the substrate is 0.3 to 0.4μm. The maximum absorption length of the recording layer is 280 to 450nm. A recording and a reading are available in a length of 350 to 450nm. Dependence of an optical recorder on characteristic of the substrate is accordingly decreased. As the width of the groove becomes larger, influence on size and shape of the beam is reduced and sensitivity to recording is improved. Even with a low power laser diode, a signal may be increased in size.