baber/WOPTO huggingface dataset:
Patent KR-20010056033-A (KR)
Inventor: JUNG SEOK HONG
IPC: G02F1/1335
Filed: 1999-12-14
Abstract: PURPOSE: A transflective liquid crystal display mounts a reflector for reflecting and diffusing a projecting light therein, thereby embodying the display dependent on a reflective light and a transmissive light and improving the light using efficiency. CONSTITUTION: A reflective liquid crystal cell(200) includes a transparent electrode(12)-formed top substrate(6) and a reflective electrode(120)-formed bottom substrate(10). The reflective electrode(120) of aluminum re-reflects a natural light incident through a polarizer sheet(18) and the top substrate(6). A polarizer sheet(18a) and a back light(20) are mounted behind the reflective liquid crystal cell(200) to use a transmissive light in the dark surroundings. A region(120a) formed between the reflective electrode(120) patterns transmits the transmissive light emitted from the back light(20). A transmissive light reflector(122) mounted in the position corresponding to the region(120a) irradiates the transmissive light toward the reflective electrode(120). The transmissive light reflector(122) with high reflection rate assumes the shape of a semicircle, a half ellipse and a semi sphere to diffuse the light toward the reflective electrode(120). A phase shift compensation sheet is mounted in the propagation path of the transmissive light to prevent the phase shift caused by the difference between the reflective light path and the transmissive light path.
Patent KR-20000017824-A (KR)
Title: Collecting method of oil on water
Inventor: JUNG BYUNG HO
IPC: C02F1/40
Filed: 1999-12-15
Abstract: PURPOSE: A collecting method of floating oil on water comprising an absorbing stage of oil with water, a separating stage of oil from water, a collecting stage of only oil, and a draining stage by controlling the amount of water is provided which generates almost no secondary environmental pollution and can reuse by treating collected oil. CONSTITUTION: A method for collecting of floating oil on water generated from the sinking water of ships such as an oil tanker etc. comprises an absorbing stage of oil with water through a pipe(3) which is fixed to a floating plate(2) by floats(1), a separating stage of oil from water using an inverse triangle-shaped separator(5), a collecting stage of only oil, and a draining stage by controlling the amount of water.
Patent KR-20010064930-A (KR)
Inventor: CHAE SEUNG JIN
IPC: G09B23/08
Filed: 1999-12-20
Abstract: PURPOSE: Provided is an anti-locking method through learning about fuel specification which uses an ascent waveform for the number of rotation in an engine to learn fuel specification and selects basic advance so that it prevents knocking by the change of fuel in advance. CONSTITUTION: The anti-locking method through learning about fuel specification comprises the steps of: (i) differentiating the number of rotation in a differentiator for the number of rotation by time unit; (ii) recognizing output in the differentiator and learning through a learning execution part; (iii) comparing the amount of learning memorized in a ROM and that of new learning printed in the differentiator in a comparator each other; and (iv) selecting a preexisting basic ignition map when the compared results are the same and a new basic map when the results are not the same.
Patent KR-20010063481-A (KR)
Inventor: LEE SANG UK
IPC: H01L21/027
Filed: 1999-12-22
Abstract: PURPOSE: A method for manufacturing a fine pattern of a semiconductor device is provided to stably form the fine pattern, by preventing an upper photoresist layer and a lower photoresist layer from being mixed when a dual photoresist layer is applied. CONSTITUTION: After a lower layer(22) is formed on a semiconductor substrate(21), a lower photoresist layer(23) is applied. After the lower photoresist layer is chemically treated by using hexamethylcyclotrisilazane(HMCTS), an oxygen treatment is performed to form a silicon oxide layer(25) on the lower photoresist layer. After an upper photoresist layer(24) is applied on the silicon oxide layer, an exposure and development process is performed regarding the upper photoresist layer. The upper photoresist layer is patterned. The silicon oxide layer is etched and patterned by using the patterned upper photoresist layer as a mask. The lower photoresist layer is etched and patterned by using the patterned upper photoresist layer and the silicon oxide layer as a mask, when the upper photoresist layer is eliminated. A fine pattern is formed by etching the lower layer while the lower photoresist layer is etched by using the lower photoresist layer as a mask.
Patent KR-20010060904-A (KR)
Inventor: HONG SEONG CHAN
IPC: B62D25/02
Filed: 1999-12-28
Abstract: PURPOSE: A reinforcing structure reinforces the structural rigidity of a front side member to minimize the deformation of a car body on a front collision and an offset collision. CONSTITUTION: A front outer side tail reinforce(13) piled on a front outer side reinforce(12) to form a closed section is joined to a bent part of a front outer side member(11). A front side tail reinforce(14) piled on a front inner side member(17) to form a closed section with the front outer side tail reinforce(13) is joined to the bent part of the front outer side member(11). A flange part is integrally formed on the front side tail reinforce(14) to be extended backward to expand the area piled with a sill side part.
Patent KR-20010061564-A (KR)
Inventor: KIM JANG YEOP
IPC: H01L21/316
Filed: 1999-12-28
Abstract: PURPOSE: Sealing oxide positioned between metal lines is provided to easily set a target of a chemical mechanical polishing by allotting the sealing oxide to a polishing stationary layer. CONSTITUTION: A carbon compound layer(202) is formed on a substrate(201), and oxide of any one selected from a group consisting of Zr, Ce, Mg, Ca and Gd or oxide of a compound mixed with at least two components selected from the group is formed on the carbon compound layer as sealing oxide(203). The sealing oxide and the carbon compound layer are selectively etched to open a portion on which a metal line(204) is formed. The metal line is formed on the entire surface, and is carried out through a chemical mechanical polishing to expose the sealing oxide. An oxygen plasma process is performed to ash the carbon to form a vapor low dielectric(205). At the step of selectively etching the carbon compound layer, a photoresist pattern is formed on the sealing compound, and the sealing compound is etched under a reduction atmosphere.
Patent KR-20010058563-A (KR)
Inventor: KIM SI BEOM
IPC: H01L21/8239
Filed: 1999-12-30
Abstract: PURPOSE: A method for forming a pattern of a semiconductor device using a dual damascene method is provided to prevent a damage of a low dielectric layer by using a dual damascene method. CONSTITUTION: A protective insulating layer(22) for protecting a metal layer is formed on a semiconductor substrate(20). The first insulating layer(23) is formed on the protective insulating layer(22). The second insulating layer(24) is formed on the first insulating layer(23). The third insulating layer(25) is formed on the second insulating layer(24). The fourth insulating layer(26) is formed on the third insulating layer(25). The first opening portion is formed by etching selectively the fourth, the third, the second, and the first insulating layers(26,25,24,23). An oxide layer is formed on whole structure. The second opening portion is formed by etching selectively the fourth and the third insulating layers(26,25). The metal layer is exposed by etching selectively the protective insulating layer(22). The first and the second opening portions are filled with a conductive layer.
Patent KR-20010058591-A (KR)
Inventor: KIM DONG JUN
IPC: A23L17/60
Filed: 1999-12-30
Abstract: PURPOSE: A toasted seaweed added with chitosan oligosaccharide is provided, which has improved quality and excellent taste by supplementing insufficient nutrient saccharide to the seaweed having rich minerals and vitamins. And a method for preparing the same is also provided. CONSTITUTION: The toasted seaweed is characterized in that 0.1-12.0 milligram of chitosan oligosaccharide is added to a piece of uncooked seaweed having a size of 20x20 square centimeter, wherein the chitosan oligosaccharide having 2-7 repeating unit number of D-glucosamine is added in an amount of more than 80 wt.% based on the total oligosaccharide. The method comprises the steps of: (i) dissolving 0.01-5 gram of chitosan oligosaccharide in 1 liter of a cooking oil selected from the group consisting of corn oil, perilla oil, soy bean oil, sesame oil and mixtures thereof; (ii) cooking the seaweed with spraying the vegetable oil on it by passing the uncooked seaweed through two rollers which have a vegetable oil spraying means, reciprocally rotate in an opposite direction and keep a temperature of 5-15 deg.C lower than the boiling point of the vegetable oil; and (iii) sprinkling an adequate amount of salt on the seaweed.
Patent KR-20010058876-A (KR)
Inventor: LEE GEUN UNG
IPC: H01L21/20
Filed: 1999-12-30
Abstract: PURPOSE: An apparatus for injecting solution for manufacturing a semiconductor device is provided to prevent the bubble and to uniformly form a coating layer on a surface of a wafer by uniformly supplying the solution. CONSTITUTION: An apparatus for injecting solution for manufacturing a semiconductor device comprises a damping vessel(10) in which solution is contained so as to be injected on a wafer(15). An auxiliary damping vessel(100) is provided to receive the solution from the damping vessel(10). An injection nozzle(103) is provided to inject the solution onto the wafer(15). The solution is introduced into the injection nozzle(103) from the auxiliary damping vessel(100) by the hydraulic pressure of the solution contained in the auxiliary damping vessel(100). A plurality of injection tips(104) are formed in the injection nozzle(103).
Patent KR-20010059997-A (KR)
Inventor: JUNG JAE GWAN
IPC: H01L27/108
Filed: 1999-12-31
Abstract: PURPOSE: A method for manufacturing a capacitor of a semiconductor device is provided to prevent a short fail due to a narrow interval by forming an HSG on an oxide layer between capacitors. CONSTITUTION: A planarization oxide layer(4) is formed on a silicon substrate(1). A storage node contact is formed within the planarization oxide layer(4). A contact plug(6) is formed within the storage node contact. A cap oxide layer is formed thereon. The cap oxide layer is removed selectively to expose the contact plug. The first polysilicon layer is formed on the exposed surface. The first HSG layer(9a) is formed thereon. The second polysilicon layer(10) is formed on the first HSG layer(9a). A photoresist layer is applied on the second polysilicon layer(10). An upper portion of the cap oxide layer is exposed by performing a CMP(Chemical Mechanical Polishing) process. The second HSG layer(11) is formed on the exposed portion of the second polysilicon layer(10). A capacitor is formed by removing the cap oxide layer.
Patent KR-20000029710-A (KR)
Inventor: SGRIGNOLI GARY J
IPC: H03L7/087
Filed: 1997-07-24
Abstract: PURPOSE: An FPLL system for a digital signal having a pilot provides an improved demodulator and a novel frequency lock indicator for an FPLL demodulated signal. CONSTITUTION: A biphase stable FPLL includes a polarity determination circuit (36) that ascertains the lockup phase of the FPLL based upon the polarity of the pilot in the digital signal. A frequency lock indicator circuit (50-60) determines from the recovered pilot when frequency lock has occurred and the polarity determination circuit is responsive thereto for inverting the phase of the incoming signal (or alternatively, of the outgoing signal) as determined in order to supply an output signal of predetermined polarity. The frequency lock indicator consists of a zero crossings detector (50) and a latch (56) that is sampled for a time period. The zero crossings detector (50) is a delay (52) and an exclusive OR gate (54). An optional confidence counter (60) may be used with the latch (56) to determine when frequency lock has occurred to provide the lock indicator signal.
Patent KR-20000068261-A (KR)
IPC: A61K31/58
Filed: 1997-08-20
Abstract: 본 발명은 신규한 화학식 (I)의 치환된 7α-(ξ-아미노알킬)에스트라트리엔 및 그의 유기 및 무기산과의 생리학상 허용되는 산 부가염에 관한 것이다. 
     〈화학식 I〉 
     
       
     
     상기 식 중, 
     측쇄 SK는 하기 화학식과 같은 라디칼이고, 
     
       
     
     (여기서, 
     m은 4, 5 또는 6이고, 
     n은 0, 1 또는 2이고, 
     x는 0, 1 또는 2이고, 
     A는 수소 원자 또는 C 1-5 알킬기이고, 
     B 및 D는 각각 수소 원자이거나, 
     A 및 B가 함께 알킬렌기 -(CH 2 ) p - (여기서, p는 2, 3, 4 또는 5임)이고, D가 수소 원자이거나, 
     A 및 D가 함께 알킬렌기 -(CH 2 ) q - (여기서, q는 2, 3 또는 4임)이고, B가 수소 원자이고, 
     E는 치환되지 않은 에틸 라디칼, 1 내지 5개 위치에서 플루오르화된 에틸 라디칼이거나, 측쇄중의 말단 치환체 -(CH 2 ) 3 -E가 직접 또는 모노-, 디- 또는 트리메틸렌기를 통해 황원자에 결합된 임의로 치환된 아릴 또는 헤테로아릴 라디칼로 치환된됨), 
     R 3 는 수소 원자, 8개 이하의 탄소 원자를 갖는 탄화수소 라디칼 또는 화학식 R 3' -C(O)- (여기서, R 3' 은 수소 원자, 8개 이하의 탄소 원자를 갖는 탄화수소 라디칼 또는 페닐 라디칼임)이고, 
     R 11 은 수소 원자, 할로겐 원자 또는 니트로옥시기 -O-NO 2 이고, 
     R 14 , R 15α , R 15β , R 16α 및 R 16β 는 각각 수소 원자이거나, 
     R 14 및 R 15α 가 추가의 결합 또는 메틸렌 브릿지이거나, 
     R 15β 는 메틸기이고, R 15α 는 수소 원자이거나, 
     R 15α 및 R 15β 가 각각 메틸기이거나, 
     R 15α 및 R 15β 가 함께 메틸렌 브릿지이거나, 
     R 16α 또는 R 16β 가 할로겐 원자이거나, 
     R 16α 및 R 16β 가 함께 메틸리덴기이며, 나머지 치환기 R 14 , R 15α , R 15β , R 16α 및  R 16β 가 각각 수소 원자이고, 
     α- 또는 β-위치의 R 17 은 수소 원자, C 1-5 알킬, C 2-5 알케닐, C 2-5 알키닐기 또는 트리플루오로메틸기이고, 
     R 17" 은 수소 원자 또는 화학식 R 17'" -C(O)- (여기서, R 17'" 은 수소 원자 또는 8개 이하의 탄소 원자를 갖는 탄화수소이거나, R 17' 이 α-위치인 경우에는 R 17' 은 R 14 와 함께 에타노 브릿지를 나타냄)이고, 
     단, A 및 B가 함께 -(CH 2 ) p -이거나 A 및 D가 함께 -(CH 2 ) q -가 아닌 경우, 치환체 R 11 , R 14 , R 15α , R 15β , R 16α 및 R 16β 중 하나 이상이 수소 원자는 아니다. 
     또한, 본 발명은 이러한 화합물과 유기 및 무기산의 생리학상 허용되는 산부가염에 관한 것이다.  이러한 신규한 화합물은 매우 강한 항에스트로겐 활성을 갖는다.  이들 중 일부는 전적으로 항에스트로겐이고, 다른 것들은 부분적으로 에스트로겐 효과를 갖는 항에스트로겐이다.  그들은 그러한 활성 특성 때문에 종양 요법 및 호르몬 대체 요법을 위한 약제를 제조하는데 가장 적절하다.
Patent KR-20000053055-A (KR)
Title: Method of preventing corrosion of metal sheet using vinyl silanes
Inventor: VAN OOIJ WIM J
IPC: B05D7/14
Filed: 1997-11-04
Abstract: PURPOSE: A method of preventing corrosion of metal sheet comprises applying a solution containing one or more hydrolyzed vinyl silanes to the metal sheet. The method is particularly useful as a pretreatment step prior to painting of galvanized steel. CONSTITUTION: A method of preventing corrosion of a metal sheet, comprising the steps of: providing a metal sheet chosen from the group consisting of coated steel sheet, aluminum sheet and aluminum alloy sheet; and applying a solution containing at least one hydrolyzed vinyl silane to the metal sheet. A coating of paint or other polymer may be applied directly on top of the vinyl silane coating.
Patent KR-20000053067-A (KR)
Inventor: AGRE DANIEL H
IPC: H04B7/15
Filed: 1997-11-03
Abstract: PURPOSE: In a mobile telephone system, a method and apparatus for performing position/preference-based service selection is provided. CONSTITUTION: A mobile telephone system employs a fleet of satellites and a set of gateway ground stations arranged around the globe for handling communications to and from mobile communication units such as mobile telephones. Signals are transmitted between a subscriber unit and the nearest gateway via one or more of the satellites. The gateway is connected to a set of individual service providers such as local telephone system. The individual service providers may be constrained for various reasons such as contractual or other legal constraints to handle communications only from subscriber units located in certain geographical areas such as within only certain countries or portions of countries. For a mobile communication from a particular subscriber unit, the gateway selects a service provider capable of handling the communication. In one implementation, the selection is based upon the location of the subscriber unit and upon any preferences specified by the subscriber unit. In other implementations, the selection is based on other parameters such as the altitude, speed or velocity of the subscriber unit or the time of day or date upon which the communication is initiated.
Patent KR-20000075547-A (KR)
IPC: B32B27/18
Filed: 1998-02-03
Abstract: 본 발명은 (a) 물, (b) 기재 매질, (c) 조성물의 중량을 기준으로 0.01% 내지 2.0% 양의 피리티온 염 및 (d) 피복 조성물의 중량을 기준으로 0.001% 내지 10%의 농도에서 페인트 제제에 적합한 많은 등급으로부터 선택된 산화아연 화합물을 포함하는 수성 피복 조성물에 관한 것이다. 또한 피리티온 존재로 인한 변색에 대해 보호되고 항곰팡이 효능을 갖는 수성 항미생물성 피복 조성물에 관한 것으로서 이때 조성물은 수성 페인트, 접착제, 코크 및 밀봉제 및 이의 배합물로 이루어진 그룹중에서 선택되고 물, 피리티온 염 또는 산, 유기 기재 매질 및 아연 화합물을 포함하며 아연 이온은 피복 조성물의 중량을 기준으로 0.001% 내지 10%의 양으로 조성물중에 존재한다.
Patent KR-20000076020-A (KR)
Title: 자동차 급속 재시동 시스템
IPC: H02J7/02
Filed: 1998-03-03
Abstract: 목표 전지의 전압보다 훨씬 높은 초과 전압과 그에 따른 고전류를 송출할 수 있는 작고 가벼우며 일회용인 에너지원을 사용하여 목표 전지를 효과적으로 충전할 수 있는 방법과 장치.  이 발명이 염두에 둔 가장 일상적인 용도는 자동차 전지이다.  목표 전지는 전극판이 전해질에 담겨 있는 이차 전지이다.  목표 전지가 방전됨에 따라 부동태 물질이 목표 전지의 전극판에 형성된다.  이 발명의 에너지원으로 목표 전지를 충전하려면 에너지원을 목표 전지와 전기적으로 연결한다.  에너지원의 초과 전압은 목표 전지의 전압보다 훨씬 높다.  고전류와 초과 전압이 목표 전지로 송출되면, 목표 전지의 전극판에 있는 황산납은 신속하게 황산으로 바뀌어서 주위의 전해질로 확산된다.
Patent KR-20000076383-A (KR)
IPC: C04B7/52
Filed: 1998-03-23
Abstract: A method of treating cement clinker by grinding the clinker in a tubular mill while charging water, gypsum, and, optionally, also a water-reduction agent to the mill at the same time. The water has a pH of from about 9 to about 13. A microfill agent and/or a water-reduction agent is mixed with said the high pH-value water to form a slurry, which is added to the clinker during the grinding process together with microfill agent and/or water-reduction agent in a dry state. The high pH value of the water can be obtained by electrolysis.
Patent KR-20010005790-A (KR)
IPC: C08L53/00
Filed: 1999-01-26
Abstract: 하기 (a) 100 중량부에 대하여, 하기 (b) 10 ∼ 250 중량부, 또는 하기 (b) 10 ∼ 250 중량부 및 하기 (d) 를 0.01 ∼ 10 중량부 함유하고, 250 ℃ 에서의 복소동적 점도 (η * (1)) 가 1.5 ×10 5 포이즈 이하이며, 또한 뉴톤점성지수 (n) 가 0.67 이하인 열가소성 엘라스토머 조성물의 분쇄물 100 중량부에 대하여, 하기 (c) 가 0.1 ∼ 5 중량부 배합되어 이루어지는 열가소성 엘라스토머 조성물 파우더, 이 파우더를 사용하는 분말성형방법 및 성형체. 
     (a) : 폴리올레핀계 수지, 
     (b) : (a) 와 혼련하여 얻어지는 조성물의 고체점탄성 측정에 의해 얻어진 tanδ-온도 의존성 곡선에서, -70 ∼ 30 ℃ 의 온도범위에서 (a) 의 tanδ피크 온도 및 (b) 의 tanδ피크 온도 모두와 다른 온도에 새로운 단일 tanδ피크를 제공하는 고무질 중합체, 
     (c) : 1 차 입경이 300 ㎚ 이하인 미세분말.
Patent KR-20000024000-A (KR)
Title: Golf stick of putting
Inventor: CHOI HO NAM
IPC: A63B53/00
Filed: 2000-01-07
Abstract: PURPOSE: Provided is a golf club for putting that contains a laser beam emanating device from the front face of putter head to golf ball. Using this golf putter by aiming the laser beam to the center of golf ball, then hitting the aimed ball, the accuracy of putting can be effectively enhanced. CONSTITUTION: A golf putter has the laser beam emanating device in the inner space of putter head which radiates laser beam from the front face(132) of putter head(130) to golf ball. The device comprises transparent cap(142), laser lamp(144), a dry battery(146), and cover plate(148) inserted into the combining hole(134) consecutively, that is formed in the face center of putter head. The laser lamp(144) can be easily controlled by button located in one side of putter shaft.
Patent KR-20010075755-A (KR)
Title: structure for Extender Text Table discrimination of Electronic Program Guide in digital TV
Inventor: LEE GYEONG MI
IPC: H04N21/482
Filed: 2000-01-17
Abstract: PURPOSE: An ETT(extended text table) discrimination structure of EPG(electronic program guide) for digital TV is provided to discriminate an ETT section in a receiving unit or in a transmission unit without parsing by inputting an event_id to a table_id_extension in the ETT section. CONSTITUTION: A first process(S10) sets an ETT section filter. A second process(S20) detects every ETT section out. A third process(S30) performs a filtering to detect just a corresponding ETT section from the ETT section by using a table_id_extension. A fourth process(S40) performs a parsing of the detected ETT section. A fifth process(S50) records the ETT section parsed in the fourth process(S40) at a text message.
Patent KR-20000024474-A (KR)
Inventor: LEE MAENG JAE
Filed: 2000-02-15
Abstract: PURPOSE: A method for transmitting an advertisement on an internet communication network is provided to increase a transmission efficiency of advertisement by adding an advertisement information to download information. CONSTITUTION: A method for transmitting an advertisement on an internet communication network is to transmit a specific advertisement when performing data download or message download. The method comprises the steps of: connecting a subscriber's terminal(10) to an information server(30); requesting information download from the subscriber's terminal to the information server(30); adding an advertisement information to the object information and transmitting the added information to the subscriber'seminal(10); and displaying the added advertisement information to the subscriber's monitor.
Patent KR-20010087062-A (KR)
Title: Stone powder is herewith plated on the cloth.
Inventor: HAN GWON TAI
IPC: B32B5/02
Filed: 2000-03-06
Abstract: PURPOSE: A stone powder coated cloth is provided which shortens process and produces high quality distribution of stone by coating far-infrared ray powder ore on both sides of the cloth after mixing natural ore of far-infrared ray fine ore powder with an adhesive, thereby reducing high manufacturing costs of far-infrared ray fine ore plate, and solving problems of sloughing of the coating materials. CONSTITUTION: The stone powder coated cloth is characterized in that the mixed coating solution penetrates through holes in the cloth to an opposite direction when coating one surface of the cloth with a mixed coating solution after mixing natural ore of far-infrared ray fine ore with an adhesive, and the coating solution is strongly united with yarn on both sides of the cloth when coating the coating solution on the opposite surface of the cloth, wherein a thickness of the cloth is controlled by folding and adhering the coated cloth, wherein contents such as magnet and jade can be contained between the folded layers by putting the contents between the layers and folding the layers, wherein an area and a length is controlled, and coating can be freely done when joining the cloth, and wherein a multi-layered stone distribution is made by joining the cloth layer by layer after coating natural ore of far-infrared ray fine ore powder having different constituents on the cloth.
Patent KR-20010087572-A (KR)
Title: Method for purchasing and providing merchandise
Inventor: HWANG SOON SAM
Filed: 2000-03-07
Abstract: PURPOSE: A method for buying and providing a commodity is provided to prevent presents from being duplicated. CONSTITUTION: A plurality of second users(214) wants to present a gift to the first user. A database(238) stores a gift list wanted by the first user, event contents, the second users list designated by the first user. A server(234) connects to the first user, the second users(214), and the database(238) through a communication network. An operator searches the database(238) using the server(234) and extracts gift buyer information registered by the first user(gift registrant). The extracted gift buyer information is classified. The operator transmits event contents information designated by the first user to the second users.
Patent KR-20010006757-A (KR)
Inventor: GARY DEAN ANDERSON
IPC: G06F12/08
Filed: 2000-03-08
Abstract: PURPOSE: A method and a device are provided to improve the speed and efficiency of a direct memory access device and to reduce a number of system bus instruction necessary for changing buffer state of L1/L2 cache. CONSTITUTION: A specific I/O page has a large size and is defined so as to have a distinguishable cache line characteristic. In the case of DMA reading, a first cache line in the I/O page (134) can be accessed as a cacheable reading line by a PCI host bridge (108) but all other lines can not be accessed because of cache disabled lines. In the case of DMA writing, the bridge (108) can access all the cache lines as cacheable lines. The bridge (108) manages cache snoop granularity of I/O page size for data, and if detecting store type system bus operation on a cache line in the I/O page, invalidates cached data in the page.