baber/WOPTO huggingface dataset:
Patent KR-20000032847-A (KR)
Title: Board configuration management method for multi board system
Inventor: OH SONG HUN
IPC: G06F15/00
Filed: 1998-11-18
Abstract: PURPOSE: A board configuration management method is provided to enhance a system efficiency, and reduce a time for a system configuration for a miulti board system. CONSTITUTION: A board configuration management method comprises steps of storing configuration data at a 1st storage(10) of a main board(1), making the main board(1) command I/O boards(2,3,4) perform the configuration, making the I/O boards(2,3,4) request a transmission of a configuration data to the main board(1), making the I/O boards(2,3,4) receive the configuration data from the main board(1), and storing the configuration data at a 2nd storage(30) of the main board(1). It is desirable that a file type configuration data, appropriate for a user's environment, is used in the step of storing the configuration data at the 1st storage(10) of the main board(1). When re booting or a hot swapping in the step, the configuration data is transmitted from the other storage, and is stored only in the case that a prior step is successfully performed.
Patent KR-20000033241-A (KR)
Title: Tundish cover for blowing inert gas used for purified steel and producing method thereof
Inventor: LEE SEUNG HU
IPC: B22D41/00
Filed: 1998-11-20
Abstract: PURPOSE: A tundish cover is provided to equally blow inert gas into a tundish without a gas sealing pipe in order to increase quality and reduce the cost. CONSTITUTION: A first shape steel frame(17) is in about a rectangular shape using a welding method. A second shape steel frame(20) forming many penetrated holes in the side is placed into the center of the first shape steel frame. The end of an injecting pipe of a tube(21) blowing the inert gas is inserted into the outer edge of the penetrated hole. The first steel frame attaches a small shape steel on the inner center and the same shaped small shape steels(19) in both sides. Also a subsidiary supporter(27) is attached between the small shape steels for minimizing heat deformation of the tundish cover. A shroud tube frame and a preheating intake are placed between the supporter for spacing after a castable is installed and the second steel frame is removed. Thus, the inert gas is equally spread into the whole tundish. The tube inserts a coupling in the coupling part for sealing the tundish.
Patent KR-19990045508-A (KR)
Title: 이동식 바이플래너 플루오르스코픽 영상처리장치
IPC: H04N7/18
Filed: 1998-11-24
Abstract: 이동식 바이플래너 플루오르스코픽 영상처리장치는 제 1 및 제 2 C형아암들 상에 배열된 제 1 및 제 2 영상처리장치들을 가진다.   C형아암들은 서로 다른 위치들을 이동하도록 휠구조 기저부들상에 배열되는 것이 선호된다.   선택적으로 제 1 C형아암은 크기가 크고 휠구조의 기저부상에 배열되는 동안, 제 2 C형아암은 크기가 더 작고, 제 1 C형아암상에 배열된다.   제어기는 격발펄스를 영상처리시스템에 보내서, 시스템들이 교번작동이 가능하다.   선택적으로 제 1 및 제 2 시스템은 마스터/슬래이브관계를 형성하고, 마스터시스템은 격발펄스를 슬래이브시시스템으로 보낸다.   제 1 시스템에 의해 형성된 영상이 표시되고, 제 2 시스템이 영상을 형성하도록, 영상처리시스템에 의해 형성된 영상들이 디스플레이에 의해 연속적으로 표시된다.   영상들이 형성되고, 후자가 영상들을 검토를 위해 디스플레이에 전달하므로 저장장치는 영상들을 저장한다.
Patent KR-20000042072-A (KR)
Title: Bi-shrinkage combined yarn and process for producing thereof
Inventor: NAM SEONG MIN
IPC: D02G1/18
Filed: 1998-12-24
Abstract: PURPOSE: Provided is a process for producing a bi-shrinkage combined yarn which has excellent bulky property and repulsion elasticity. Thereby, it is possible to prepare a bi-shrinkage combined yarn which has excellent bulky property, repulsion elasticity and reduced dyeing difference. CONSTITUTION: A polyester bi-shrinkage combined yarn is prepared by combining an effected yarn and a center yarn of high shrinkage polyester yarn. The effected yarn has low shrinkage and stretch property through a heat treatment. The high shrinkage polyester yarn has 8-15mol% of isophthalic acid copolymer. The center yarn has staple denier of 4.0-8.0dpf, and the effected yarn has staple denier of 1.0-4.0dpf. A ratio of the center yarn denier based on the effected yarn denier is 0.6-1.2. The effected yarn has anhydrous shrinkage ratio of -5-0%, and dry shrinkage ratio of -10-0%. The effected yarn is prepared by melt spinning a polyester to speed of 3,500m/min to heat treat the spinned fiber at temperature of elongation roller of 110°C, a temperature of elongation plate of 200°C and an elongation ratio of 1.06.
Patent KR-20000043081-A (KR)
Title: Washing machine having water-saving bucket
Inventor: KIM HYUN JIN
IPC: D06F39/12
Filed: 1998-12-28
Abstract: PURPOSE: A washing machine having a water-saving bucket is provided which properly maintains the rising height of wash water, to save wash water. CONSTITUTION: A washing machine comprises a body (1); an outer bucket (2) which is set and fixed inside of the body (1) and does not have holes; a washing and dehydrating bucket (3) which is set inside of the outer bucket (2), has holes, and is rotatable; an operation motor (4) which is equipped at low part inside of the body (1) and whose operation axis (4a) is bound to the washing and dehydrating bucket (3) to rotate the washing and dehydrating bucket (3); and a water-saving bucket (10) which is set and fixed between the outer bucket (2) and the washing and dehydrating bucket (3), does not have holes, and induces washing water to allow the washing water to ascend rapidly due to the centrifugal force during the one-directional rotation of the washing and dehydrating bucket (3).
Patent KR-20000046130-A (KR)
Title: Device for increasing sector by using switch in cdma system and method for controlling the same
Inventor: SHIN SEON YOUNG
IPC: H04B7/26
Filed: 1998-12-31
Abstract: PURPOSE: A device for increasing a sector by using a switch in CDMA system and a method for controlling the same are provided to maximize the number of subscribers by increasing the number of sectors to N sectors without changing a channel element being a modulation/demodulation chip. CONSTITUTION: Many switches(410) are mounted among many channel elements(200) and N sectors(300). A switching operation is performed to make many channel elements(200) be selectively connected to N sectors(300). Therefore, although the number of sectors is increase to N sectors, a channel element of a modulation/demodulation chip needs not to be changed. A hardware and software system of a present base station system need not to be corrected according to the increasing of the sectors. The number of subscribers is increased as the number of sectors(n), so that one base station includes many subscribers.
Patent KR-19990044258-A (KR)
Title: 특성상 스냅을 갖는 접점 블록
IPC: H01M50/50
Filed: 1996-08-20
Abstract: 접점 블록(10)에는 전기 장치의 하우징(42)에 있는 개구부(44)의 제1 모서리(46) 및 제2 모서리(48)에 편향하여 삽입하는 제1 레지(34) 및 제2 레지(38)가 마련되어 있다.  접점 블록(10)은 접점면(18)을 제공하기 위해 적어도 하나의 전기 접점을 기계적으로 지지함으로써, 제1 전기 장치(40)를 제2 전기 장치(6)에 전기적으로 상호 접속할 수 있다.  접점 블록(10)은 최종 조립 작용을 하면서 접점면을 확보하기 위해 조립시 적소에 체결된다.
Patent KR-19990044369-A (KR)
IPC: B23D23/00
Filed: 1996-07-01
Abstract: The present invention relates to a method for manufacturing a formed piece of aluminum or some other relatively soft metal. In accordance with the invention, a slice is cut form a rod of aluminum or some other raw-cast metal; the slice forms a blank (3), which is placed on the mould surface (10) of a mould tool (5) rotating about its axis (4), and which is formed using a roll forming tool rotating about its axis (6) inclined to the axis of the mould tool and being in linear rolling contact with the blank surface. The blank is then formed to a substantially disc-shaped piece of plate between the opposite rotating tools (5, 7). The method may be part of the manufacturing process of a frying pan or kettle so that the roll formed piece may comprise the bottom and collar of the utensil, which is bent to form the sides of the cooking utensil at the next pressure turning stage; or, alternatively, the roll formed piece may be fastened as the bottom to a separately manufactured utensil by linear pressing. The formed piece may also be deep-drawn to a globe of a street light, or it may be used as a traffic sign, or as a lid for a soft-drink can.
Patent KR-19990063680-A (KR)
Title: 폴리아미드 조성물로 제조된 전기성분 및 전자성분
IPC: C08G69/36
Filed: 1996-09-18
Abstract: 본 발명은 특히 표면 마운팅법이 사용될 때, 납땜조건하에서 저항성이 향상되고, 폴리아미드 조성물로 제조된 전기성분 및 전자성분에 관한 것으로서, 
     상기는 지방족 디카르복시산 및 디아민 또는 α,ω-아미노산으로부터 유도된 단위로 본래 구성된 주사슬을 갖는 폴리마이드 조성물을 사용하여 수득되며, 상기 사슬단위의 1-40%는 1,6-시클로헥산디카르복시산 및 지방족 디아민으로부터 유도되거나 1,4-시클로헥산디아민 및 지방족 디카르복시산으로부터 유도되며, 
     결과적으로 적외선 방법으로 납땜하는동안 기포가 형성되는 온도는 호모폴리아미드인 경우보다 20-30℃ 높은 것을 특징으로 한다.
Patent KR-19990063938-A (KR)
Title: 세라믹-세라믹 및 세라믹-금속 복합 재료의 1단계 합성 및치밀화
IPC: B22F3/10
Filed: 1996-10-02
Abstract: 둘 이상의 세라믹 상과 하나 이상의 금속성 상을 함유하는 세라믹-세라믹 및 세라믹-금속 복합 재료가 기재되어 있다.  이들 세라믹 상들 중의 하나는 금속 붕화물 또는 금속 붕화물들의 혼합물이고 다른 세라믹 상은 금속성 질화물, 금속성 탄화물 또는 금속성 질화물과 금속성 탄화물과의 혼합물이다.  이들 복합 재료는 티탄, 지르코늄, 하프늄, 바나듐, 니오븀, 탄탈, 크롬, 몰리브덴, 텅스텐, 알루미늄, 규소 및 이들 중 둘 이상의 혼합물로 이루어진 그룹으로부터 선택된 하나 이상의 원소, 질화붕소, 탄화붕소 및 이들의 혼합물로부터 선택된 하나 이상의 붕소 화합물, 및 철, 코발트, 니켈, 구리, 알루미늄, 규소, 팔라듐, 백금, 은, 금, 루테늄, 로듐, 오스뮴, 이리듐 및 이들 중 둘 이상의 혼합물로 이루어진 그룹으로부터 선택된 점화 온도 감소량의 금속(단, 하나 이상의 원소는 하나 이상의 금속과 상이하다)의 혼합물을 점화시키는 단계를 포함하는 연소 합성 방법으로 제조할 수 있다.  당해 방법은 생성물의 미세구조를 고도로 조절하고 밀도가 높은 복합 재료를 수득하는 데 비교적 낮은 압력이 필요하다.  밀도가 높고 미세하게 분쇄된 미세구조를 갖는 치밀화된 생성물은 연소 합성 동안 기계적 압력을 가함으로써 수득할 수 있다.  복합체는 경도, 조도, 강도, 내마모성 및 돌발 고장에 대한 내성이 개선되었다.
Patent KR-19990067347-A (KR)
Title: 선택 호출 수신기 및 그 내부에 메시지를 저장하는 방법
IPC: H04W84/02
Filed: 1996-10-07
Abstract: 페이저(44)와 같은 선택 호출 수신기는 카테고리들 및 임의의 서브카테고리들에 의해 수신된 메시지들(24, 32)을 분류하고 저장한다.  수신된 메시지의 카테고리는 수신된 메시지를 페이저(44) 내에 저장된 식별 데이타(106)와 비교함으로써 결정된다.  식별 데이타(106) 및 카테고리들은 사용자에 의해 변경될 수 있다.  수신된 메시지의 카테고리가 결정될 때, 메시지의 카테고리를 나타내는 경보가 사용자 경보로서 발생된다.
Patent KR-20000015870-A (KR)
Title: Global financial services integration system and process
Inventor: SCHEIN ARTHUR A
IPC: G06Q30/00
Filed: 1997-05-23
Abstract: PURPOSE: A global standard messaging system is provided to allow customers to access a full range of global financial services using a variety of access points. CONSTITUTION: A global standard messaging system includes a global communication network for using in financial institutes, integration customer information and making the information accessible from remote locations; a comprehensive database assembled from diverse sources; processes for retrieving the information from the central database in a meaningful and practical way. The system includes several levels of access communications as well as built in flexibility so that it can be accessed by a variety of remote systems of varying degrees of complexity and language. System and process permit rapid communication among worldwide users of the service as may be desired by industries relating to the transfer of finances.
Patent KR-20000060416-A (KR)
Title: Plasma etching system
Inventor: KIM BYEONG HYEON
IPC: H01L21/306
Filed: 1999-03-15
Abstract: PURPOSE: A plasma etching system is provided to improve radio frequency(RF) efficiency by minimizing interference of a magnetic field formed around a coil. CONSTITUTION: A plasma etching system for etching an evaporated layer on a wafer by plasma, comprises a chamber(10), coils(12), a first radio frequency(RF) power(14), a bottom electrode(18), a second RF power(16) and an insulating element(30). The wafer is transferred to the chamber. The coils are disposed a predetermined interval from each other on the top of the chamber. The first RF power is applied to form a magnetic field around the coil, connected in common to the coils. The bottom electrode is positioned on the bottom of the wafer in the chamber. The second RF power is applied so that the plasma generated by ionization of gas in the chamber is directed toward the wafer connected to the bottom electrode. The insulating element separates the coils from each other so that the magnetic field generated around the coil does not interfere with each other when the first RF power is applied.
Patent KR-20000061349-A (KR)
Inventor: SHIN SEON YEONG
IPC: H04B7/24
Filed: 1999-03-25
Abstract: PURPOSE: A mobile terminal service method for a wireless local loop(WLL) system is provided for concurrently servicing a mobile terminal and a fixed terminal to a WLL system without decreasing the capacity of a WLL base station by preventing two-channel resource occupancy of a fixed terminal position in a hand-off region. CONSTITUTION: A wireless network is designed to install a wireless communication system. At this time, an installation position of the system and a cell radius set for a good quality communication, and output capacity of a base station are important. In order to provide service to a mobile terminal using the WLL system, certain mobility must be provided to a mobile terminal. Therefore, a handoff region must be formed for supporting a seamless handoff function.
Patent KR-20000065637-A (KR)
Inventor: KANG DAE IK
IPC: A23L21/10
Filed: 1999-04-07
Abstract: PURPOSE: Method for producing acid jelly that has proper gel strength and texture for dessert and diffuses flavor well even after sterilization process is provided. CONSTITUTION: The producing method of the acid jelly has the following steps: (i) adding a solid mixture of gelling agents, a sequestrant like citric acid and sweetenings to a water solution of liquid fructose or starch syrup and heating with stirring; (ii) forming texture of jelly by adding 0.1-0.6wt% of calcium lactate, calcium sulfate or calcium gluconate right after the completion of hydration of the gelling agent; (iii) adding fruit juice, acidulant, spices and food colors; and then (iv) sterilizing and cooling after charging in a container. The gelling agent is a mixture of 0.2-0.8wt% of capa-carrageenan and Locust Bean Gum, and the produced jelly has pH 3.0-4.0.
Patent KR-19990087897-A (KR)
IPC: C07C6/12
Filed: 1999-04-09
Abstract: 탄소수 9이상의 알킬치환벤젠을 처리해서 1분자중의 핵치환메틸기 수의 평균치가 적어도 2.5인 총탄소수 10의 알킬치환벤젠을 포함하는 생성유를 얻은후 증류해서 농축시키고, 이어서 1,2,4,5-테트라메틸벤젠을 결정화시켜 분리하므로서 1,2,4,5-테트라메틸벤젠을 제조한다. 
     피로멜리트산이나 무수피로멜리트산의 원료로서 유용한 1,2,4,5-테트라메틸벤젠을 총탄소수 9이상의 알킬치환벤젠을 포함하는 원료유를 사용하여 효율적으로 제조하는 공업적으로 유리한 방법을 제공한다.
Patent KR-19990083299-A (KR)
Title: 점화장약저장장치및이장치의제조방법
IPC: B60R22/46
Filed: 1999-04-19
Abstract: 본 발명은 점화 장약(18, 20; 24)을 둘러싸는 하우징(10)을 구비하는 점화 장약 저장 장치로서, 유리로만 형성되는 상기 하우징(10)은 불꽃 갭 또는 전열선(16)이 있는 하나 이상의 금속 덕트(14)를 포함한다.
Patent KR-20000066937-A (KR)
Inventor: KWON BYEONG HO
IPC: H01L21/316
Filed: 1999-04-22
Abstract: PURPOSE: A method for manufacturing a field oxidation layer of a semiconductor device is provided to uniformly form a narrow field oxidation layer and a broad field oxidation layer without a damage, by forming a high density plasma(HDP) oxidation layer and a tetra ethyl ortho silicate(TEOS) layer to perform a reverse etch process and a chemical mechanical polishing(CMP) planarization process. CONSTITUTION: After an insulating layer(20) is stacked on a semiconductor substrate(10), a trench is formed by a masking etching. A first gap filling oxidation layer is stacked to be buried in the trench. A second gap filling oxidation layer of a predetermined thickness is stacked on the first gap filling oxidation layer. After a reverse etch process is preformed regarding the fist and second gap filling oxidation layers, a field oxidation layer is formed by planarizing the resultant structure by a chemical mechanical polishing(CMP) process.
Patent KR-20000073462-A (KR)
Inventor: KIM DONG SEOK
IPC: H04N7/18
Filed: 1999-05-11
Abstract: PURPOSE: A method of processing data of a video phone at real time is provided to perform a compressing and restoring operation of an image and audio data by a program in a main processor at a real time, thereby reducing a manufacturing cost. CONSTITUTION: A method of processing data of a video phone at real time comprises the steps of: setting a minimum time for operating a system as a reference time for repeating each data treatment routine; performing a system process of a first priority at every reference time; performing the system process for the reference time and then performing an audio process of a second priority for the rest time; and performing a process of a third priority after completing the process of the second priority. In the method, the system process is performed at every reference time. If an urgent process is generated during performing the audio process and the image process, the other performing process is stopped and the urgent process is first performed. If the reference time is terminated in a state that the audio process and the image processor are not completed, the rest portion to be performed is stored in a stack.
Patent KR-20000074438-A (KR)
Inventor: LIM JONG JIN
IPC: G06F15/02
Filed: 1999-05-20
Abstract: PURPOSE: An existing PDA(Personal Digital Assistant) or HHT(Hand Held Terminal) is easily portable. But the PDA(Personal Digital Assistant) has no extension of function. CONSTITUTION: The PDA(Personal Digital Assistant) is equipped with a PCMCIA(Personal Computer Memory Card International Association) card used in a note-book computer. Therefore, an existing PCMCIA card can be connected to the PDA without developing the main body of the computer, and it needs to develop the PCMCIA card only.
Patent KR-20010001110-A (KR)
Inventor: JUNG HAE BEOP
IPC: H01J29/32
Filed: 1999-06-02
Abstract: PURPOSE: A structure of a fluorescent film in a color CRT(Cathode Ray Tube) and a production method thereof are provided to simplify a producing process of the fluorescent film and to improve the contrast characteristic, the brightness and the color reproducibility of a screen. CONSTITUTION: A mixed filter slurry(3gb) is spread inside a panel(1) having a black matrix(2) and dried. The mixed filter slurry(3gb) contains a mixed pigment dispersed solution, a PVA(polyvinyl alcohol), an ADC/SDC(Ammonium/Sodium Dichromic Acid). The mixed pigment dispersed solution disperses a CoO-Al2O3, a ZnO-TiO2-NiO-CoO and a Fe2O3 with pure water. Portions to form green/blue fluorescent layers(4G,4B) are exposed by ultraviolet rays. A mixed filter layer(3GB) is formed in green/glue positions by developing the portions with pure water. Three-color fluorescent layers are formed by three-color fluorescent members.
Patent KR-20010001161-A (KR)
Inventor: SON MIN YEONG
IPC: H01L23/28
Filed: 1999-06-02
Abstract: PURPOSE: A flip chip package having a smaller substrate is provided to minimize chip crack due to the warpage of a substrate and to improve mounting density. CONSTITUTION: A flip chip package(200) is provided with a semiconductor chip(110) mounted facedown on a substrate(120) by a flip chip bonding technique. The chip(110) has a plurality of bumps(112) formed on an active surface thereof, and the substrate(120) has bump pads for receiving the bumps(112) of the chip(110). A resin encapsulant(130) is provided between the chip(110) and the substrate(120). External contact terminals(140) are provided to a lower face of the substrate(120), opposite to a chip-bonded upper face, and electrically connected to the bump pads. In particular, the substrate(120) has the size(B) smaller than that(A) of the chip(110). Since the smaller substrate(120) leads to a lower thermal expansion than ever, a damage of the chip(110), such as chip crack, due to the warpage of the substrate(120) is reduced.
Patent KR-20000005860-A (KR)
Inventor: P ESSEL HANS
IPC: H04N5/44
Filed: 1999-06-03
Abstract: PURPOSE: A frequency converter is provided to reduce complexity of circuitry of the frequency converter. CONSTITUTION: In a frequency converter, an intermediate frequency television signal is inputted to a radio frequency signal input terminal through an intermediate frequency filter. The intermediate frequency television signal is converted to a low frequency signal by a mixer loading a local oscillator signal through local oscillator signal input terminal. The frequency of the local oscillator signal is limited to an image carrier range restricted by a channel spacing and each television specification. After frequency change, the frequency of the local oscillator signal is suppressed as a converted neighboring image carrier or decreased to a residue amplitude to be neglected.
Patent KR-20010002307-A (KR)
Inventor: CHOI EOK U
IPC: H04B1/02
Filed: 1999-06-14
Abstract: PURPOSE: A data transmitting device with improved processor overload is provided to make a processor control a control memory and a first-in-first-out(FIFO) memory controller, and to share roles to manage a data generation and a received data application, so as to reduce the processor load for transceiving data to improve a processor capacity. CONSTITUTION: A processor(21) controls a packet memory(22) and a control memory(23) through a system bus, and manages a data generation and a received data application. The packet memory(22) stores data generated from the processor(21), and performs a storing function for utilizing the received data by the processor(21). The control memory(23) consists of a dual port RAM(DPRAM) performing a bidirectional transmitting function. The control memory(23) stores a data storing region, a data length, and whether data for being transmitted exists as a table, and stores a received data storing region, a received data length, or a received data state as a table to manage the tables. A first-in-first-out(FIFO)(24) temporally stores transmitting data and received data for communicating with an external interface, and reads the stored data received to the FIFO(24) from a FIFO memory controller(25), or writes the transmitting data. The FIFO memory controller(25) transmits the transmitting data to the FIFO(24), and transmits the data received to the FIFO(24) to the packet memory(22) for utilizing the received data by the processor(21).
Patent KR-20010003621-A (KR)
Inventor: HA SANG GIL
IPC: E01F15/00
Filed: 1999-06-24
Abstract: PURPOSE: A steel guardrail for roadway and an impact relaxation device installed in the steel guardrail are provided to prevent a secondary accident by enhancing the structural performance, and minimize a deformation of structure and the damage of the guardrail and a vehicle by absorbing the impact in multi-stage during crashing. CONSTITUTION: A steel guardrail for a roadway comprises; numerous props(10) in which more than one installing grooves are depressed; numerous cross beams(20); and a connection rod(30) which connects the rear end of one cross beam(20) to the front end of the other cross beams(20) in the direction of the length. In the cross beams(20), an opened part(21) having an engaging lug(22) is formed, and the engaging lug(22) is projected inward from one side facing the installing groove. The cross beam(20) is installed in the prop(10) in a row or numerous rows by a fixing hook(23) in '£' shape installed in the engaging lug(22) with a fastening member. In an impact relaxation device, an impact relaxing member comprises a hollow member in rectangular section to absorb the impact, which occurs between the cross beam(20) and the prop(10). And then the impact relaxing member is installed with a first bolt member and a second bolt member. The first bolt is fastened in an installation groove, and the second bolt is fastened in the fixing hook.
Patent KR-20010004984-A (KR)
Inventor: KWON HYEOK
IPC: H01L21/31
Filed: 1999-06-30
Abstract: PURPOSE: A metal interlayer insulating film formation method in semiconductor devices is provided to be capable of preventing generation of curve at the sidewall of the contact hole and improving reliability and yield of devices. CONSTITUTION: Word lines(22) are first formed on a semiconductor substrate(21) in which an underlying structure is formed. After an etch stop film(23) and a metal interlayer insulating film(24) are formed on the entire structure, planarizing process is then performed. A protection film(25) is formed on the planarized metal interlayer insulating film by means of high-temperature deposition method. Then, a plug contact hole(26) for coupling the junction region of the semiconductor substrate with bit lines(28) and capacitors is formed and a cleaning process is performed in order to remove native oxide film or impurities in the bottom of the plug contact hole. Next, a plug polysilicon layer(27) is formed on the entire structure including the plug contact hole. After the plug polysilicon layer is planarized so that the protection film remains sufficiently, and bit lines are formed on the plug polysilicon layer.