baber/WOPTO huggingface dataset:
Patent KR-20000033729-A (KR)
Title: Application specific integrated circuit for test
Inventor: KIM SOO BON
IPC: G01R31/28
Filed: 1998-11-25
Abstract: PURPOSE: An application specific integrated circuit(ASIC) for test is provided to decrease the number of input and output terminals within proper numbers of gate in FPGA(field programmable gate arrays). CONSTITUTION: An apparatus application specific integrated circuit(ASIC) for test includes a clock generator(400) generates a first system clock pulse to provide a plurality of function blocks(100, 230). A frequency demultiplier(300) generates a second system clock pulse which is faster n times than the first system clock pulse by demultipling the first system clock pulse. Each output terminal of the plurality of function block includes a multiplexor(120) divides the data of M bite processed in the function block and selectively outputs the resulted data divided with M/N bit unit in synchronization to the second system clock pulse, and each input terminal of the plurality of function block includes a demultiplexor(210) distributes the resulted data of M/N bit unit in predetermined order in synchronization to the second system clock pulse. A variable delayer(220) delays with variable the resulted data provided from the demultiplexor(210) and in turn and provide the function block as a result data of M bite.
Patent KR-20000034143-A (KR)
Title: Method for managing equipment of atm communication network
Inventor: LEE YUN JEONG
IPC: H04L12/433
Filed: 1998-11-27
Abstract: PURPOSE: A method is provided to manage a management of equipment about ATM(asynchronous transfer mode) communication devices composed of devices to conform to management information model of ATM network element in one management system of equipment. CONSTITUTION: A management system of equipment(10) manages an equipment of communication network by reading an MOCs(managed object class) related with the equipment from each switching board(1,2) embedding personal computers differed the kinds of machines(3), terminals(4), and an agent of network management. The MOC inside many different devices of communication network is searched for managing the equipment of the communication network equipment. The each searched MOC is converted in a form of the MOC corresponding to the communication network, and the converted MOC is displayed in a tree structure.
Patent KR-20000050269-A (KR)
Title: Drainage warning system of package air conditioner
Inventor: LIM WON KYUNG
IPC: F24F13/00
Filed: 1998-12-08
Abstract: PURPOSE: A drainage warning system of a package air conditioner is provided to automatically discharge condensation water outside when a trouble is sensed in the condensation water drainage by a sensor mounted above a water tub, thereby preventing troubles of air conditioner due to the overflow of the condensation water. CONSTITUTION: A drainage warning system of a package air conditioner in which a water tub(10) is mounted at a lower part of an indoor unit of the air conditioner for collecting condensation water generated from an evaporator(20) to discharge outside via a drainage hose(15), including a sensor(11) mounted above the water tube by fixing with a bracket(14) with a predetermined distance from a bottom surface of the water tub, a control part(30) for controlling a signal output from the sensor, and a warning element(40) for operating under the control of the control part, wherein a discharge hose is connected at one side of the water tub and a pump is mounted for operating according to the signal output from the sensor under the control of the control part.
Patent KR-19990063144-A (KR)
Title: 노광 장치 및 노광 방법
IPC: G03F7/22
Filed: 1998-12-17
Abstract: 본 발명의 노광 장치 및 노광 방법에 따르면, 포토마스크(10A)에는 기판(1A)상에 전사할 길이가 단축된 직선부를 갖는 직선 패턴이 구비되어 있다.  기판(1A)의 한 방향으로 포토마스크(10A)를 이동 및 정지하고 포토마스크(10A)에 광(20)을 조사하는 것에 의해, 직선 패턴은 기판(1A) 위로 전사된다.  그리하여, 노광 장치 및 노광 방법은 소형 포토마스크를 사용하여 노광에 의해 기판상에 직선 패턴을 효율적으로 전사할 수 있도록 한다.
Patent KR-20000040245-A (KR)
Title: Method for manufacturing upper plate of plasma display panel
Inventor: LEE MI GYUNG
IPC: H01J9/24
Filed: 1998-12-17
Abstract: PURPOSE: A method for manufacturing an upper plate of a plasma display panel is provided to reduce the impact of an upper glass which can be generated in the manufacturing process by using a tape in which a film process is integrally formed. CONSTITUTION: A method for manufacturing an upper plate of a plasma display panel comprises the steps of forming an indium tin oxide, PR coating, exposure, developing, strip, washing, PR coating, exposure, developing, strip, dielectric body printing, drying, printing, drying, and depositing. An integrally formed tape is attached to a glass substrate, and a layer is formed by heating.
Patent KR-20000041036-A (KR)
Title: Method of forming gate electrode of semiconductor device
Inventor: YEO IN SEOK
IPC: H01L21/336
Filed: 1998-12-21
Abstract: PURPOSE: A method of forming a gate electrode of a semiconductor device is to prevent a thin layer having a high melting point exposed in the side wall of a gate electrode from being oxidized. CONSTITUTION: A method of forming a gate electrode of a semiconductor device comprises the steps of: forming a gate insulating layer(12), a doped polysilicon layer(13), and a silicon nitride layer(14) on a semiconductor substrate(11) sequentially; patterning a certain portion of the doped polysilicon layer and the silicon nitride layer; forming a reoxidation layer(15) on the side wall of the doped polysilicon layer by heat-treating the structure of the patterned doped polysilicon layer and the silicon nitride layer; injecting low concentration impurities for sources and drains into the semiconductor substrate of the exposed gate insulating layer using the reoxidation layer as a mask; forming an insulating layer spacer(16) on the side walls of the silicon nitride layer and the reoxidation layer respectively; injecting high concentration impurities for sources and drains into the semiconductor substrate of the exposed gate insulating layer using the insulating layer spacer layer as a mask; depositing an insulating layer(17) to sufficiently ruin the structure of the patterned doped polysilicon layer and the silicon nitride layer; removing the insulating layer to expose the surface of the silicon nitride layer; and forming a diffusion preventive layer(18) and a high melting thin layer(19) in the silicon nitride layer-removed portion.
Patent KR-19990071784-A (KR)
Title: 단일스텝 피드백과 통계적 시뮬레이션을 이용하는 제조공정의모니터링, 분석시스템
IPC: H01L21/00
Filed: 1996-09-27
Abstract: 본 발명은 실제 공정과 동시에 수행되는 반도체 제조공정의 통계적 시뮬레이션에 관한 것이다. 확률밀도함수에서 도출된 입력파라미터가 시뮬레이터에 입력되고, 상기 시뮬레이터는 확률밀도함수로서 모델화되는 실제 제조공정을 차례로 시뮬레이션한다. 각각의 시뮬레이션스텝은 문제를 가장 잘 해결할 수 있는 결과를 결정하기 위해 반복적인 연산을 하는 시도-오류방법인 몬테카를로 방식을 이용하여 임의의 시드값을 응용하여 반복된다. 상기 시뮬레이터는 확률밀도함수의 형태로 출력을 생성한다. 통계시뮬레이션은 시뮬레이션의 실행에 있어서 실제 인라인측정데이터에서 공급 또는 도출된 입력 파라미터를 이용하는 단일스텝 피드백을 이용한다. 시뮬레이터에 의해서 생성된 출력데이터인 중간 출력구조데이터와 WET데이터는 측정데이터가 유효한 환경에서 실제 인라인측정데이터와 비교된다. 시뮬레이터의 확률밀도구조는 모의데이터가 실제 인라인 측정데이터에 더욱 가깝게 매치하도록 각 시뮬레이션스텝 이후에 조정된다.
Patent KR-19990072054-A (KR)
IPC: C07D235/26
Filed: 1997-10-09
Abstract: The present invention relates to a novel 2-hydroxynaphthalene-3,6-dicarboxylic acid derivative. The compound is useful as a raw material for dyes, pigments, photosensitive materials and the like.
Patent KR-19990082469-A (KR)
Title: Compounds for the sorption of gases
Inventor: MATACOTTA FRANCESCO CINO
IPC: H05B/
Filed: 1997-02-10
Abstract: Compounds having the formulawherein A is an alkaline-earth metal, an alkaline metal, a lanthanide, or a solid solution thereof, B is a transition metal, an element of group III, or a solid solution thereof, and d has a value between 0 and 1; a method for preparing the compounds; a method for producing composite materials on various matrices and thin or thick films deposited on various substrates which contain the compounds; their use; and a method for eliminating certain gases from a mixture that includes them by using the compounds.
Patent KR-19990082632-A (KR)
Title: 근거리망에서 전자 우편 메시지를 전송하기 위한 방법과 장치.
IPC: H04N1/32
Filed: 1996-12-16
Abstract: 본 발명은 근거리망(local area network)에서 이용되는 전자 우편(전자 메일) 방법과 장치 등에 관한 것으로써, 본 발명은 전자 우편(전자 메일) 서비스를 위한 동적 경로 배정(dynamic routing)의 정보를 이용하는데 있다.  사용자 프로그램(24)(user program)에 의하여 기록된 메시지는 큐 매니저(25)(queue manager)에 도착하며, 큐 매니저(25)(queue manager)는 요구되어지는 전자 우편 서비스 형(型)과 수신 주소 등과 같은 필요한 정보를 메시지 경로 배정 유닛(26)(message routing unit)으로 전송한다.  상기 유닛(26)은 제어 유닛(28)(control unit)의 요구에서 변화되는 경로 배정 테이블(27)(routing table)을 조정하고, 상기 유닛(26)은 종착 네트워크 노드(destination network node)와 관계 있는 정보를 큐 매니저(25)로 전송한다.  통신 유닛(29)(communication unit)은 경로 배정 테이블을 만들기 위하여 요구되는 데이터뿐 아니라 전자 우편 등을 수신하고 전송한다.
Patent KR-20000010527-A (KR)
Title: Improved star wheel equipment
Inventor: OTRUBA SBATOVOYE
IPC: B65G47/84
Filed: 1997-04-16
Abstract: PURPOSE: A star wheel is provided to exclude the need to a gate, an inrush star, a feed screw and the like when transferring hetero material segment with a container. CONSTITUTION: The star wheel equipment is composed of:a feeding device or a star wheel(12) individually transferring containers(8) to a curved line channel between an inrush position(14) and an outlet position(16) by separating the containers(8) which are transferred by a conveyer(18) to the inrush position(14) with successive flow; the conveyer(18) functioned as a conveyer belt supporting the containers(8); and a guide rail(20) making the containers(8) face to the inrush position(14) in a single advancing line.
Patent KR-20000010836-A (KR)
Title: Four-position style switching machine for controlling firearm shoot
Inventor: ROBINS LORENCE E
IPC: F41A19/46
Filed: 1997-04-10
Abstract: PURPOSE: A machine for controlling the blast of a firearm is provided to prevent the automatic sear from accidentally disconnecting the hammer. CONSTITUTION: The firearm(10) is composed of:a hammer(8); a switch(16) connected to a rotary blast control cam(30) which can be revolved round the shaft to be from the blast switching form of the firearm; a semi-automatic disconnector(20); a burst ratchet disconnector(21); an automatic sear(22) including a leg(42) and a disconnector(40) installed to be able to circulate on a pin(44); a bolt assembly(24) having a bolt carrier(26); and a ball rivet(28).
Patent KR-20000054977-A (KR)
Inventor: JEONG JAE HUN
IPC: C03B23/26
Filed: 1999-02-02
Abstract: PURPOSE: A glass cutting device is provided for the purpose of enhancing the glass cutting velocity as well as for a massive production of glass, thereby fundamentally resolving the problem of contaminating the cooling water when cooling the cut portion of the glass. The glass cutting device is also provided for the purpose of maximizing the thermal stress subsequent to heating and cooling of the cut portion by limiting the shape of a laser beam for heating the cut portion. CONSTITUTION: A glass cutting device 10 according to the present invention comprises a base member 11 and a table 20 mounted on the base member 11 and rotatable in both directions by a first driving section 21 at a predetermined angle. An arm 13 is installed on the base member 11 so as to be supported by at least one supporter 12. A first slider 30 is installed on the arm 13 so as to be slidable by a second driving section 31. An elevating member 40 is installed on the first slider 30 so as to be elevatable by a third driving section 41. An optical system 50 is installed on the elevating member 40, and a laser generating section 60 is installed on the optical system 50 for emitting laser beams. A cooling section 70 is installed on an upper part of the table 20 for cooling the cut portion heated by the laser beams.
Patent KR-20000055834-A (KR)
Inventor: KIM HAN SOO
IPC: A63F7/06
Filed: 1999-02-10
Abstract: PURPOSE: A pitching game device for training baseball play is provided which can give a feeling that a user is playing real baseball game, to improve the pitching skill, by pitching to a real-life size virtual batter appeared as a printed or moving image in a big screen installed indoor. CONSTITUTION: A pitching game device is characterized by comprising: a speed measuring part which measures the speed of a pitched ball by a user; a XY coordinate sensor(124) to recognize the place of the ball from the site of judgement; a screen part(126) showing printed image of a batter at bat; a controlling part(114) to analyze the speed of the ball obtained from the speed measuring part and the characteristics of the ball recognized through the XY coordinate sensor, and to output scores and judgement resulted from the analyzed speed and the characteristics; a score board to show the calculated scores and the judgement based on the result. The device further comprises a moving image storage part(112) to store images such as the virtual batter's hitting scene, and situations after the hitting; and a moving image projecting part(116) to project and magnify the images.
Patent KR-19990046699-A (KR)
Title: 핸즈프리형중계기
Filed: 1999-04-16
Abstract: 개시된 핸즈프리형 중계기는 1인의 무선 단말기 가입자가 서비스를 받을 수 있는 소형 중계기를 핸즈프리(Hands free)형으로 구성하여 수신 감도가 낮은 지역에서 핸즈프리형으로 통신할 수 있도록 한다. 
     기지국으로부터 안테나를 통해 수신되는 RF 신호들 중에서 설정된 주파수 대역의 RF 신호를 필터링하여 출력함과 아울러 기지국으로 송출할 RF 신호를 필터링하여 안테나로 출력하는 제 1 송수 전환기; 무선 단말기로부터 케이블을 통해 입력되는 RF 신호들 중에서 설정된 주파수 대역의 RF 신호를 필터링하여 출력함과 아울러 기지국으로 수신된 RF 신호를 필터링하여 무선 단말기로 출력하는 제 2 송수 전환기; 제 1 및 제 2 송수 전환기가 출력하는 RF 신호를 필터링하여 특정 주파수 대역의 RF 신호를 검출하는 복수의 필터; 복수의 필터에서 각각 출력된 RF 신호를 증폭한 후 제 1 및 제 2 송수 전환기로 각기 출력하는 복수의 전력 증폭기; 제 2 송수 전환기와 무선 단말기를 연결하는 케이블에 접속되고 제 2 송수 전환기와 무선 단말기의 사이에 전송되는 RF 신호에서 음성신호를 검출함과 아울러 입력되는 음성신호를 RF 신호로 변환하여 출력하는 음성신호 처리부; 및 음성신호 처리부가 검출한 음성신호를 스피커로 출력함과 아울러 가입자의 음성신호를 마이크를 통해 입력하여 음성신호 처리부에 입력시키는 음성 입력/출력수단을 구비한다.
Patent KR-20000066840-A (KR)
Inventor: KIM IL SU
IPC: A47B87/00
Filed: 1999-04-21
Abstract: PURPOSE: A fixing structure for furniture is provided to solve the inconvenience of alignment of layered furniture by fixing the layered state firmly. CONSTITUTION: A main lower plate(130) is settled and a fixing member(150) is inserted to a fixing groove(131) on the upper face of the main lower plate. The fixing member has a guide unit(152) on the central circumference of a pin(151) inserted to and hung on a guide groove(115). Herein, simply the lower of the pin is inserted while the upper is protruded upwardly. Layered furniture is stacked by inserting a fixing groove(114) to the pin. The furniture is layered and fixed in a desired shape by combining the fixing groove on the upper face of the layered furniture with the fixing groove formed on the lower of another furniture via the fixing member.
Patent KR-19990088303-A (KR)
Title: 충방전제어회로및충전형전원장치
IPC: H02J7/02
Filed: 1999-05-14
Abstract: 스위치 회로를 턴온/오프시키고, 각각의 2차전지의 충방전을 검출하는 비교기들을 직렬로 접속함으로서 복수의 직렬접속된 2차전지의 충방전을 제어하는 충방전 제어회로에서, 비교기 전체 전류소비는 하나의 비교기에 의해 소비되는 전류와 동일한 것으로 되어 충방전 제어회로의 전류소비를 감소시키고 충전당 2차전지의 수명을 늘릴 수 있다.
Patent KR-20000005741-A (KR)
Inventor: KYURESWIPAJALUEOREMAN
IPC: G01R31/3185
Filed: 1999-05-29
Abstract: PURPOSE: In a scan flip-flop circuit, after a logic value of a first input is latched in response to a first clock signal and a logic value of a second input is latched in response to a second clock signal, the two logic values are outputted for the second clock. CONSTITUTION: The scan flip-flop circuit (900) comprises: a serial input(902); a parallel input(904); a selective input(906); a control input(908); a first output(910); and a second output. When a test enable signal EN of the selective input and a control signal CNTL of the control input are all in a second logic state, the flip-flop circuit latches the test value of the serial input which outputs to the first output and the second output. When the test enable signal EN is set to the first logic state and the control signal CNTL remains in the second logic state, the flip-flop circuit latches the test value of the parallel input which outputs to the second output. Therefore the serial test value and the parallel test value respectively go to the first output and the second output at the same time.
Patent KR-19990068724-A (KR)
Title: 다양한색상을표출하는연필
Filed: 1999-06-15
Abstract: 본 발명은 연필 몸체를 구성함에 있어 단색 또는 적어도 2색이상의 혼합색상을 소정형태로 다등분 배열하여 다양한 칼라가 표출되도록 하고 몸체 커팅시 커팅면의 색상 또한 몸체에 표현된 색상과 동일색상으로 표출되도록 함으로서 다색칼라에 의한 미적감각을 향상시켜 구매욕을 높이도록 한 다양한 색상을 표출하는 연필에 관한 것이며, 이를 실현하기 위하여 연필 몸체를 합성수지재 원료로 압출성형하여 구성하고 압출성형에 있어 용융상태의 합성수지재 원료에 단색 또는 적어도 2색이상의 다색을 혼배합함으로서 몸체로 부터 다양한 칼라가 표출되고 몸체 커팅시 커팅면의 색상 또한 몸체에 표현된 색상과 동일색상으로 표출토록 하여 다색칼라에 의한 색채감을 높임은 물론 유체의 접촉이나 외부의 빛으로 부터 칼라가 변색되거나 탈색되지 않도록 함과, 연필 몸체 압출성형시 넣어지는 심재를 연필심재나 색연필심재 또는 아이펜슬(눈썹그리개)심재로 다양하게 개재하여 다색으로 표출되는 합성수지재 몸체를 갖는 색연필이나 아이펜슬로도 사용토록한 것이다.
Patent KR-20010004313-A (KR)
Inventor: CHO YONG U
IPC: H01J11/38
Filed: 1999-06-28
Abstract: PURPOSE: A plasma display panel with a reverse bus electrode and a method for fabricating the plasma display panel are provided to improve a feature of a device by leveling a transparency dielectric layer and a protective film. CONSTITUTION: A front panel of a plasma display panel consists of a glass substrate, a groove of the glass substrate, a bus electrode in the groove, a transparency electrode, a transparency dielectric layer, and a dielectric protective film. A method for fabricating the front panel of the plasma display panel comprises the steps of: forming a groove in a bus electrode area by selectively etching the glass substrate; forming the bus electrode by embedding a conduction film into the groove; forming a pattern of the transparency electrode overlapping with the bus electrode and the glass substrate; forming the transparency dielectric layer on a front side of the glass substrate; and forming the dielectric protective film on the transparency dielectric layer. Since the bus electrode is formed at a lower portion of the transparency electrode, it is possible to easily leveling the transparency dielectric layer.
Patent KR-20010008787-A (KR)
Inventor: PARK SUNG HUN
IPC: B60Q1/34
Filed: 1999-07-03
Abstract: PURPOSE: A switch type direction indicating lamp actuator provides a comfortable driving by operating the switch for indicating directions without leaving hands from a steering wheel on driving. CONSTITUTION: A switch type direction indicating lamp actuator comprises a mounting tube(13), a fixed plate(11), a rotating plate(25), an actuating device(29) and a motion device. The mounting tube(13) which a steering-wheel shaft penetrates is formed in the center portion. The fixed plate(11) has a 1st and a 2nd switches(15,17) connected with a left-right direction indicating lamp respectively, on both sides of the mounting tube(13). The rotating plate(25), close to the fixed plate(11) and disposed an operation lever(23) on one side and a pressing device(27) on the opposite side of the operation lever(23), selectively runs the 1st, 2nd switch(15,17) by rotating regular angle against the fixed plate(11). The actuating device(29), disposed on the lower portion of the fixed plate(11), spins the rotating plate(25) against the fixed plate(11) by supplying an additional pressure to the pressing device(27). The motion device, connected with the actuating device(29) and controlled by a user, operates the left-right direction indicating lamp and converts the operation lever(23) by spinning the rotating plate(25) after running the actuating device(29).
Patent KR-20010011822-A (KR)
Inventor: LEE JONG SEOP
IPC: F01L1/24
Filed: 1999-07-30
Abstract: PURPOSE: Structure for a hydraulic gap adjuster is provided to prevent air from flowing into a high pressure chamber from an oil passage even if an engine restarts after a regular time. CONSTITUTION: A hydraulic gap adjuster(20) sets a valve gap to 'zero' by supplying oil through an oil passage(11) formed in a cylinder head(10). The oil passage contains an oil isolating device(30) blocking the oil passage not to drain oil to a reservoir when oil is not supplied to the hydraulic gap adjuster. Thus, air amount is minimized in the inner low pressure chamber of an adjuster body so that a valve gap is smoothly adjusted and noise caused by air inflow is removed.
Patent KR-20010026555-A (KR)
Inventor: PARK GYU JIN
IPC: G11B27/34
Filed: 1999-09-07
Abstract: PURPOSE: A method for putting advertisements using digital captions is provided to simultaneously accumulate advertising caption data or official announcement caption data, when digital files are made out by accumulating caption data in a digital audio, then to display the accumulated advertising caption data on a caption display window in a digital audio file replaying process. Therefore, a commercial advertising or a public service advertising relating to a specific product is intensively performed. CONSTITUTION: If a digital audio data file is replayed, a CPU checks whether caption data is loaded into the digital file. If not, the CPU replays a digital audio only. If the caption data is loaded, the CPU decides whether caption advertising data exists. If not, the CPU replays the digital file with a digital caption audio mode. If the caption advertising data exists, the CPU decides whether advertising phrase data is valid. If so, the CPU simultaneously displays the caption advertising data and caption data synchronized with the digital audio on a character display area of a graphic LCD(Liquid Crystal Display) of a digital caption player, through region segmentations. The CPU decodes digital audio data, and outputs the decoded digital audio data as an analog voice signal via a DAC(Digital to Analog Converter) through a speaker or earphones. If the validity of the caption advertising data expires, the CPU outputs a usage announcement or an alarm message through an LCD screen.
Patent KR-20010027720-A (KR)
Inventor: CHA SEUNG HO
IPC: C22B7/00
Filed: 1999-09-15
Abstract: PURPOSE: An apparatus and a method for recycling dusts in the iron and steel refining process are provided to prevent environmental pollution by transferring dusts collected in a precipitator to the molten pig iron refining process for recycling by nitrogen gas, and reduce cost for refining molten pig iron by substituting a high priced dephosphorizer. CONSTITUTION: The apparatus for recycling dusts in the iron and steel refining process comprises a dust collecting part (10) which transfers dusts which are generated from a torpedo ladle car (150) and collected from a precipitator (110) by nitrogen gas for storing inside a distribution vessel (20); a fluidizing part (30) equipped with a plurality of nitrogen ejecting nozzles (24) which are inserted inside of lower part of the distribution vessel (20) so that dusts inside the distribution vessel (20) are not agglutinated; and a dust injection part (40) which supplies the dusts from the distribution vessel (20) to the torpedo ladle car by connecting a dust inlet pipe (42) inserted into the distribution vessel (20) with a dephosphorizer/desulfurizer injection lance (45), wherein dephosphorizer/desulfurizer in dusts generated from the torpedo ladle car (150) is recycled as a molten pig iron injection dephosphorizer/desulfurizer of the torpedo ladle car (150).
Patent KR-20010029375-A (KR)
Inventor: CHO YEONG DU
IPC: F28D1/04
Filed: 1999-09-30
Abstract: PURPOSE: A flow channel of laminated evaporator for heat exchanger is provided to achieve an improved heat exchange efficiency of the evaporator and significantly reduce volume of the evaporator by equalizing the volume of refrigerant pressure drop throughout the flow channel of the evaporator. CONSTITUTION: A plate(1) for forming an evaporator is provided with a plurality of flow channel walls(2) so as to constitute a flow channel(3). The flow channel has an inlet unit(4) and an outlet unit(5) formed in diagonal direction. The flow channel formed by flow channel walls has a plurality of convex-concave portions(6) formed at each of plates. The convex-concave portion is arranged to contact the flow channel wall. Thus, the volume of refrigerant pressure drop is nearly equal around the inlet unit and the outlet unit of the flow channel, to thereby obtain the heat exchange area distributed uniformly throughout the plate.