baber/WOPTO huggingface dataset:
Patent KR-20040058634-A (KR)
Title: Electrolyte for lithium secondary battery and lithium secondary battery comprising same
Inventor: NOH HYEONG GON
IPC: H01M10/0525
Filed: 2002-12-27
Abstract: PURPOSE: An electrolyte for a lithium secondary battery is provided to prevent the swelling of a battery at high temperature, without decreasing the battery capacity or cycle life. The electrolyte is suitably applicable to a prismatic or pouch type battery. CONSTITUTION: The electrolyte for a lithium secondary battery comprises non-aqueous organic solvent; based on the weight of the non-aqueous organic solvent, 0.01-10wt% of a thiolane compound represented by a general formula 1; and a lithium salt. In the formula 1, A is 0 or NR, wherein R is an alkyl group having C1-6. The non-aqueous organic solvent is selected from cyclic carbonate, linear carbonate, ester, ether and ketone. The lithium salt is selected from LiPF6, LiAsF6, LiCF3SO3, LiN(CF3SO2)3, LiBF6 and LiClO4. The lithium secondary battery comprises the electrolyte, a positive electrode which contains a positive electrode active material that is able to (de)intercalate lithium and a negative electrode which contains a negative electrode active material that is able to (de)intercalate lithium.
Patent KR-20040059409-A (KR)
Title: Method for fabricating contact hole of semiconductor device
Inventor: RYU SANG UK
IPC: H01L21/28
Filed: 2002-12-28
Abstract: PURPOSE: A method for forming a contact hole of a semiconductor device is provided to reduce contact resistance by performing salicide processing after increasing micro morphology of silicon in a source/drain region. CONSTITUTION: A transistor including a gate(13) and a source/drain region(14) is formed on a silicon substrate(11). A buffer oxide layer and an HSG(Hemi-Spherical Grain) silicon layer are formed on the resultant structure. The substrate and the gate are selectively etched using the HSG silicon layer and the buffer oxide layer. The HSG silicon layer is removed. A salicide layer(18) is formed on the gate and the source/drain region. A BLC(Borderless Contact) insulating layer(19) and an interlayer dielectric(20) are formed on the resultant structure. A plug(21) is then formed by selectively etching the interlayer dielectric and the BLC insulating layer.
Patent KR-20040061315-A (KR)
Title: METHOD FOR INITIALIZE CHANNEL CARD IN CDMA 2000 1x EvDo BTS SYSTEM
Inventor: CHO GYE CHEOL
IPC: H04B7/155
Filed: 2002-12-30
Abstract: PURPOSE: A method for initializing a channel card in a CDMA 2000 1x EvDo(Evolution Data Only) base station system is provided to transmit the corresponding message only in the even case that changed data is transmitted to a channel card of a base station which is operating, thereby preventing unnecessary messages. CONSTITUTION: A base station state managing block of a BCP(BTS Control Processor) transmits a system time transmission message received from a GPS(Global Positioning System) to an FLM(Forward Link Modem) of a channel card in a base station system(S110). The base station state managing block transmits a message for checking a normal state of the corresponding FLM to the FLM(S120). The FLM transmits a message for notifying that the FLM is in the normal state to the base station state managing block(S130). The base station state managing block transmits the message received from the FLM to a base station call processing block(S140). The base station call processing block transmits configuration data transmission message related to a control channel initialization of the FLM(S150). The base station call processing block transmits a data transmission message related to initialization to the FLM(S160). The base station call processing block transmits a control channel function execution start message to the FLM(S170). The FLM transmits a message for notifying control channel function execution start to the base station call processing block(S180).
Patent KR-20020013965-A (KR)
Title: Spectral magnitude quantization for a speech coder
IPC: G10L19/038
Filed: 2000-07-18
Abstract: An amplitude quantization scheme for low-bit-rate speech coders includes the first step of extracting a vector of spectral information from a frame. The energy of the vector is normalized to generate gain factors. The gain factors are differentially vector quantized. The normalized gain factors are non-uniformly downsampled to generate a fixed-dimension vector with elements associated with a set of non-uniform frequency bands. The fixed-dimension vector is split into two or more sub-vectors. The sub-vectors are differentially quantized, to best advantage with a harmonic cloning process.
Patent KR-20020073327-A (KR)
Title: Enhanced crossflow heat transfer
IPC: F28F1/14
Filed: 2000-07-18
Abstract: Baffles (20, 22) arranged alongside a plurality of conduits (12).
Patent KR-20020060176-A (KR)
Title: Water-in-oil emulsion and its uses in particular in cosmetics
IPC: A61K8/00
Filed: 2001-06-19
Abstract: Composition comprising an aqueous phase dispersed in an oil phase includes an emulsifier comprising a polar portion and a nonpolar polyolefin portion of at least 40 carbon atoms.
Patent KR-20020074463-A (KR)
Title: Process for the Application of Powder Coatings to Non-Metallic Substrates
IPC: B05D1/06
Filed: 2001-10-26
Abstract: The present invention describes a process for the application of a powder coating to a non-conductive substrate by first exposing the non conductive substrate to a combination of steam and heat at temperatures between 70° C. and 140° C. for a period between 5 seconds and up to 10 minutes, followed by electrostatic application of a powder coating to the substrate which is grounded; this simple and reliable pre-treatment method allows an efficient application of powder coatings to non-conductive substrates resulting in uniform and even deposition of the powder coating over the whole surface including edges and with no adverse effects on the subsequent curing of the powder film.
Patent KR-20020073541-A (KR)
IPC: F16C11/10
Filed: 2001-11-28
Abstract: 제 1 힌지부재(2)에는, 가동부재(6)를 축선방향으로 이동 가능하게, 또한 회동 불가능하게 연결한다.  제 2 힌지부재(3)에는, 타격부재(7)를 회동 불가능하게 연결한다.  코일스프링(도시하지 않음)에 의해 가동부재(6)를 타격부재(7)에 접촉시킨다.  가동부재(6)와 타격부재(7)와의 접촉면사이에는, 코일스프링의 가하는 힘을, 타격부재(7)를 회동시키는 회동력으로 변환시키는 힘변환기구(도시하지 않음)를 설치한다.  제 2 힌지부재(3)의 바깥둘레에는, 접촉볼록부(32)를 형성한다.  타격부재(7)의 바깥둘레에는, 접촉볼록부(32)가 끼워넣음 접촉오목부(71)를 형성한다.  접촉오목부(71)의 폭 W2 은, 접촉볼록부(32)의 폭 Wl 보다 약간 넓고, 그 분량만큼만 타격부재(7)를 제 2 힌지부재(3)에 대하여 상대 회동 가능하게 한다.
Patent KR-20020086928-A (KR)
Title: 활성 탄소 섬유 형태의 여과 성분
Filed: 2001-03-21
Abstract: 본 방법은 편물, 이차원적인 직물의 재봉, 또는 합사와 같은 제조 공정을 이용하여, 탄소 전구체 섬유의 응집성 직물로부터 제조되는 물품의 예비 성형물의 제조; 및 활성 탄소 섬유로 만들어진 원하는 성형 물품을 직접적으로 얻기 위해 탄화 및 활성화 처리를 수행하는 단계로 이루어지는 방법으로, 예비 성형물은; 탄화 및 활성화 처리 중에 축소를 고려하기 위해 크기가 측정된다. 상기 방법은 특히 방사능의, 생물학적인, 또는 화학적 칩입과 같은 칩입에 대항하는 보호를 제공하는 의류의 물품을 생산하기 위해 이용될 수 있다.
Patent KR-20020082897-A (KR)
Title: 구름 접촉 부품의 표면을 마무리하는 방법
IPC: F16C33/32
Filed: 2001-03-22
Abstract: 본 발명은 베어링 구름 요소, 베어링 링 또는 트랙션 드라이브 구름 요소 등과 같은 구름 접촉 부품의 표면을 마무리하기 위한 마무리 방법에 관한 것으로, 이 방법은 상기 표면에서 절삭 작업을 실행하는 단계와, 그 후에 상기 베어링 부품의 재료보다 경질인 재료로 이루어진 볼에 의해 표면을 캘린더링하거나 버니싱하는 단계를 포함하며, 상기 단계에 의해 표면에 가해지는 최대 캘린더링 또는 버니싱 압력은 7 Gpa 미만이다.
Patent KR-20020093853-A (KR)
Title: 금속 성분을 포함하는 투명 판재 및 그 사용 방법
IPC: C03C27/12
Filed: 2001-04-11
Abstract: 본 발명은 금속 도선(21) 또는 적어도 은층을 포함하는 박층 스택(20)과 같은 금속 요소가 제공되는 투명 판재에 관한 것으로, 이러한 투명 판재의 특성은 근 적외선에서 파동의 투과를 방지하는 것이다.
Patent KR-20030028461-A (KR)
IPC: H01J37/317
Filed: 2001-03-22
Abstract: 복수의 전자빔을 독립적으로 집속하는 다축전자렌즈와, 다축전자렌즈에 대하여 대략 평행으로 설치된 기재, 및 당해 기재에 설치되어 렌즈 개구부를 통과하는 전자빔에 가하여지는 다축전자렌즈의 렌즈강도를 조정하는 렌즈강도조정기를 포함하는 렌즈강도조정부를 포함하는 것을 특징으로 하는 전자빔 노광장치를 제공한다. 다축전자렌즈는 복수의 개구부를 포함하되, 대략 평행으로 배치된 복수의 렌즈부 자성 도체부를 가지고, 당해 복수의 렌즈부 자성 도체부에 각각 포함되는 개구부가, 복수의 전자빔을 통과시키는 복수의 렌즈개구부를 형성하는 것이 바람직하다. 렌즈강도조정기는, 기재에서 렌즈개구부에 걸쳐, 렌즈부 자성 도체부와 절연되도록 전자빔에 대하여 주설된 조정전극을 포함하는 것이 바람직하고, 또한, 렌즈강도조정기는 기재에서 전자빔의 조사방향을 따라 전자빔에 대하여 주설되고, 렌즈 개구부에 형성되는 자장강도를 조정하는 조정 코일을 가져도 좋다.
Patent KR-20030021157-A (KR)
Title: Aromatics purification from petroleum streams
IPC: C10G7/08
Filed: 2001-04-27
Abstract: A process for separating a feed mixture comprising at least one aromatic hydrocarbon and at least one non-aromatic hydrocarbon by extractive distillation (ED) utilizing a solvent mixture comprising sulfolane and at least one co-solvent. The co-solvent is an alkyl sulfolane having from 4 to 8 carbon atoms per molecule. The solvent mixture is added to the top of the ED column, and the feed mixture is added at a point on the ED column that is lower than the point where the solvent mixture is added. Extractive distillation is performed, and the aromatic and non-aromatic hydrocarbons are separated.
Patent KR-20020091275-A (KR)
IPC: H04N5/445
Filed: 2001-05-05
Abstract: In consumer electronics appliances, such as, in particular, television receivers and video recorders, it is known practice to simplify operation using a so-called menu which is displayed on the screen and sets up a dialogue between the appliance and the user. The scope and level of difficulty for utilizing such menus can differ very greatly. A particular menu may be far too complicated for the inexperienced user, and yet may be too simple for the experienced user. It is therefore known practice to provide the appliance with means which the user can use to modify the menu and match it to the respective requirements of the user. Such a change to a menu by removing or adding menu items again requires a certain level of competence, however.
Patent KR-20030022797-A (KR)
Title: 차량용 시트 및 그 제조방법
IPC: A47C27/14
Filed: 2002-04-08
Abstract: 차량용 시트(S)는 적어도 착좌영역(11)과 이 착좌영역(11)을 지지하는 착좌부(10)을 구비한다. 그리고, 착좌부(10)은, 외장재로서 발포체를 소정의 형상으로 성형한 것이다. 이 때, 착좌부에 등받이 영역(21)을 지지하는 등받이부(20)을 형성하는 것도 가능하다. 또한, PP(폴리프로필렌)비즈(beads)발포체, PE(폴레에틸렌)비즈(beads)발포체, PP발포체, PE발포체, AS수지(acrylonitrile styrene resin), EVA(에틸렌 초산 비닐 공중합 수지), 및 우레탄폼재의 어느 하나를 이용하는 것이 가능하다.
Patent KR-20030024677-A (KR)
Title: Two conductor measuring device, method for testing the same and testing system therefor
IPC: G08C19/02
Filed: 2001-04-18
Abstract: The inventive two conductor measuring device (MS) is intended for use in a means of transport, especially in a ship, and is supplied on-board with a current of a current loop, which originates from a source circuit (Q). Said source circuit is certified in accordance with a valid standard IEC-1000-4-5, especially in accordance with standard IEC-1000-4-5:1995, is supplied with power by a primary vehicle electrical system (NP) of the means of transport, and serves to supply a secondary vehicle electrical system (NS) with power. The two conductor measuring device (MS) is designed in such a way that it can not be certified for an electromagnetic compatibility in accordance with valid standard IEC-1000-4-5. During a method for testing the two conductor measuring device (MS) for electromagnetic compatibility, a hybrid generator, especially in accordance with standard IEC-60-1 or IEC 469-1, is used for generating a current/voltage surge. A decoupling network for simulating the source circuit (Q) is connected in outgoing circuit to the hybrid generator. A two conductor measuring device (MS), which does not satisfy the test specifications of the standard IEC-1000-4-5:1995, is connected in outgoing circuit to said decoupling network, and a type of approval for use on the secondary vehicle electrical system (NS) is granted to other two conductor measuring devices of the same type when the tested two conductor measuring device has withstood the test.
Patent KR-20030003755-A (KR)
IPC: H01L27/108
Filed: 2001-05-15
Abstract: 낮은 경사각 도펀트 주입(114) 방법을 이용하여 트렌치 위로 셀프 어라인드 마스크를 형성하여 집적 회로 내의 딥 트렌치(104)의 내부에 전기적 연결을 형성하는 방법 및 시스템이다. 전기적 연결은 바람직하게는 트렌치 커패시터의 내부 금속판(110)과 수직 트렌치 트랜지스터의 터미널 사이를 연결한다. 낮은 종횡비를 갖는 마스크 구조와 결합하여 낮은 경사각 주입 공정은 일반적으로 트렌치 내 또는 위의 물질의 일부분만을 도핑시킨다. 이후 물질은 산화와 같은 후속 공정에 도핑된 영역과 도핑되지 않은 영역 사이의 선택도를 가지며 제공된다. 에칭 공정과 같은 다른 공정 단계에서 트렌치 내 또는 윗부분 물질(120)의 일부분은 제거되고, 트렌치의 일부분을 덮고 있는 셀프 어라인드 마스크(122)를 남겨지며, 트렌치의 남겨진 부분은 다음 공정을 위하여 노출시킨다. 이와 달리, 에칭 공정은 단독으로 도핑된 영역과 도핑되지 않은 영역 사이의 선택도를 갖고 수행되어 마스크를 생성하는데 이용된다. 셀프 어라인드 마스크를 트렌치 내의 물질의 일부분을 선택적으로 제거하는데 이용하여 수직 트렌치 커패시터와 매립형 스트랩을 트렌치의 한쪽 면에만 형성할 수 있다.
Patent KR-20030007885-A (KR)
IPC: B24D3/28
Filed: 2001-06-07
Abstract: 본 발명의 미세 기포 폴리우레탄 발포제의 제조방법은, 이소시아네이트기 함유 화합물을 포함하는 제1 성분 및 활성 수소기 함유 화합물을 포함하는 제2 성분을 혼합하여 미세 기포 폴리우레탄 발포체를 제조하는 방법으로서, 상기 제1 성분 및 제2 성분 중 적어도 한 쪽에, 수산기를 갖지 않는 실리콘계 비이온성 계면활성제를 제1 성분 및 제2 성분의 합계량에 대하여 0.1∼5 중량% 미만으로 첨가하고, 상기 계면활성제를 첨가한 성분을 비반응성 기체와 교반하여, 비반응성 기체를 미세 기포로 분산시킨 기포 분산액을 제조한 후, 상기 기포 분산액에 나머지 성분을 혼합하여 경화시키는 것을 특징으로 한다.  본 발명에 따르면, 물 등의 화학 반응성 발포제나 플루오로카본 등의 기화 팽창성 발포제, 미소 중공 발포체, 용매 가용성 물질 등의 상이한 종류의 물질을 사용하지 않고서도, 균일한 미세 기포를 가지며, 동시에 동일한 밀도의 것보다도 높은 경도를 갖는 폴리우레탄 발포체를 제조할 수 있다.
Patent KR-20030016289-A (KR)
IPC: A61Q5/00
Filed: 2001-05-30
Abstract: 본 발명은 (ⅰ) 1종 이상의 글리세리드 지방 에스테르인 제1 오일상 성분 10 중량％ 내지 95 중량％ (전체 중량 기준) 및 
     (ⅱ) 평균 탄소쇄 길이가 탄소원자 20개 미만인 1종 이상의 탄화수소유인 제2 오일상 성분 5 중량％ 내지 90 중량％ (전체 중량 기준)의 블렌드를 포함하는 헤어 오일을 제공한다.
Patent KR-20030012901-A (KR)
IPC: G06T7/00
Filed: 2001-06-25
Abstract: 각각의 유형의 모델의 유효성을 증대시키도록 응용된 복수의 모델을 포함하는 검사 시스템이 개시되었다.  한 실시예에서, 인쇄 회로 기판은 객체를 검사하기 위해 이미지 모델, 구조적 모델 및 기하학적 모델을 포함한다.  이미지 모델은 유사한 객체를 식별하기 위해 검사되는 객체에 먼저 응용된다.  이미지 모델이 적용된 후, 구조적 모델은 동일한 구조를 갖는 이미지에 객체가 존재하는 지의 여부를 판정하기 위해 응용되고 이미지 모델이 이미지내에서 일부분을 발견했는 지를 판정하도록 응용된다.  최종적으로, 기하학적 모델이 적용되고 검사되는 객체의 위치를 정밀하게 판정하기 위해 이전의 두 모델에 의해 제공된 근사한 위치 데이터를 사용한다. 또한 복수의 모델을 인지 및 갱신하기 위한 기술도 개시되었다.
Patent KR-20040062242-A (KR)
Inventor: KIM YUN HO
IPC: C08F279/00
Filed: 2003-01-02
Abstract: PURPOSE: An impact modifier for a poly(vinyl chloride) resin, its preparation method and a poly(vinyl chloride) resin containing the impact modifier are provided to improve the impact strength, transparency and efflorescence resistance of a poly(vinyl chloride) resin. CONSTITUTION: The impact modifier is a graft copolymer prepared by graft polymerizing at least one vinyl monomer selected from the group consisting of an alkyl methacrylate, an acrylate and an ethylene unsaturated aromatic compound to a rubber latex, wherein an acid is added during the polymerization process. Preferably the content of an acid is 0.01-10 parts by weight based on 100 parts by weight of the final graft polymer, the acid is at least one selected from the group consisting of sulfuric acid, hydrochloric acid, sulfonic acid, maleic acid, acetic acid, fumaric acid, itaconic acid, acrylic acid, methacrylic acid, carboxylic acid, propionic acid and crotonic acid, and the diameter of graft polymer particles is increased to 0.1-0.3 micrometers by the addition of an acid.
Patent KR-20030011943-A (KR)
Inventor: JUNG CHEOL
IPC: G08C17/02
Filed: 2003-01-03
Abstract: PURPOSE: A wireless water supply meter with extremely low power consumption and a method of the same are provided, which is designed to be used in a real field by reducing power consumption during meter reading or standby. CONSTITUTION: A sensor(22) senses a rotation of a wheel and generates a corresponding electric pulse when a wheel inside of a water supply meter is rotated according to the flow of a fluid. A pulse counter(242) counts the pulse from the sensor(22). A timer(243) generates a clock signal indicating a reference time. The first controller(244) performs a reading control operation according to a set meter reading schedule and discriminates whether a control mode is a receiving standby mode or a sleep mode based on the clock signal from the timer(243). An RF interface device(246) transmits an accumulated reading data to an RF device for a handy terminal when the control mode is the receiving standby mode.
Patent KR-20040063221-A (KR)
Inventor: PARK WON GU
IPC: H02M3/28
Filed: 2003-01-06
Abstract: PURPOSE: A power switching circuit is provided to reduce the manufacturing cost by using a small-sized switch. CONSTITUTION: A power switching circuit includes a switching unit(220) to supply a predetermined driving voltage to a driving power terminal of a power supply by using the external AC power. The switching unit includes a first switch(222) and a second switch(224). The first switch is turned on and off by a user in order to the driving voltage to the driving power terminal of the power supply. The second switch is operated in the opposite direction to the first switch. The second switch is turned off and the driving voltage is applied to the driving terminal when the first switch is turned on. The second switch is turned on and the driving voltage is not applied to the driving terminal when the first switch is turned off.
Patent KR-20040063437-A (KR)
Inventor: HYUN YEONG JIN
IPC: B23Q3/00
Filed: 2003-01-07
Abstract: PURPOSE: Structure for protecting a bearing of an automatic tool changing high-speed headstock is provided to prevent the damage on a bearing in automatic tool change by suppressing the movement of a shaft when the shaft is pushed toward a tool. CONSTITUTION: A pair of bearings(40,40a) are installed in a headstock. An outer wheel of the front bearing is constrained by an outer wheel constraint tool fixed in a headstock case(30). An inner wheel push suppressing gap(S1) is formed between a front wheel constraint tool and the outer wheel constraint tool. A vibroisolating cover(32) is installed outside the inner wheel push suppressing gap. A bearing assembling error correcting gap(S11) is formed between the headstock case and the vibroisolating cover.
Patent KR-20040066641-A (KR)
Inventor: LIM CHAE HWAN
IPC: H04N7/26
Filed: 2003-01-20
Abstract: PURPOSE: An apparatus for communicating a mobile video mail by using transcoding, and a method therefor are provided to transmit a video mail between mobile terminals supporting different codecs. CONSTITUTION: If receiving an arrival report message of a mobile video mail, a video mail server(180) senses the arrival report message and confirms a second mobile phone(120) which is a destination terminal. The mobile video mail server(180) inspects whether a database(213) has information related to a support codec of the second mobile phone(120). If not, the mobile video mail server(180) generates/transmits a mobile video mail arrival message including information inquiring support codec information of the second mobile phone(120). If so, the mobile video mail server(180) confirms the support codec information of the second mobile phone(120). The mobile video mail server(180) confirms support codec information of the second mobile phone(120) and a first mobile phone(110) to confirm whether transcoding is required. A transcoding server(190) transcodes the mobile video mail of the first mobile phone(110) corresponding to the support codec of the second mobile phone(120). The mobile video mail server(180) transmits the video mail at a data rate set up in the second mobile phone(120).
Patent KR-20030063218-A (KR)
Title: 화장용 체질 안료 및 이의 제조 방법
IPC: A61K8/18
Filed: 2003-01-21
Abstract: 피부 감촉이 양호하고, 청색이 없고, 소프트 포커스(soft focusing) 효과가 높고(반사광 강도의 시야각 의존성이 낮고), 피부에 대해 자연스러운 색조를 갖고, 적절한 은폐성(주름 은폐 효과)을 갖는 화장용 체질 안료가 제공된다.  상기 화장용 체질 안료는 박편상 기질의 표면에 TiO 2 미립자가 산재된 상태로 단일층의 형태로 부착된 것을 특징으로 한다.
Patent KR-20040067184-A (KR)
Inventor: CHAE HYANG SEOK
IPC: G06K19/077
Filed: 2003-01-22
Abstract: PURPOSE: A smart card coating a contact of a loop coil contact with a conductive paste and a manufacturing method thereof are provided to enhance a combining force between the loop coil and the conductive paste, and automate a manufacturing process by coating the contacts formed to both ends of the loop coil with the conductive paste through a printing method. CONSTITUTION: A lower layer(50) is made of polymer and forms a lower part of the smart card. The loop coil(70) is attached to a loop coil inserting layer(60) and a spotfacing groove(61) is formed on the loop coil inserting layer. The spotfacing groove(81) is formed on an upper layer(80). The conductive paste contacts(90a,90b) are formed to the loop coil drawn out to the spotfacing groove of the upper layer. A chip base(30) is inserted into the spotfacing groove formed on the upper layer and includes the contacts(30a,30b) adhered to the conductive paste contacts by the conductive adhesives. A microchip(31) is electrically connected to the contacts of the chip base and is inserted into the spotfacing groove formed on the loop coil inserting layer by combining to the chip base.
Patent KR-20040047510-A (KR)
Inventor: HAN JEONG SEOP
IPC: C08L33/12
Filed: 2003-01-24
Abstract: PURPOSE: Provided is a processing aid copolymer composition, which has excellent powder flow property at a high temperature and minimizes adhesion to a metal surface of a processing machine during the processing of vinyl chloride resins, thereby showing excellent long-term workability. CONSTITUTION: The processing aid copolymer composition comprises: 50-80 parts by weight of a core copolymer composed of an aromatic vinyl monomer and an alkyl acrylate; and 20-50 parts by weight of a shell copolymer based on methyl methacrylate monomer, an aromatic vinyl monomer and an unsaturated organic acid monomer. Particularly, the core copolymer comprises 40-70 parts by weight of an aromatic vinyl monomer and 30-60 parts by weight of an alkyl acrylate, and the shell copolymer comprises 50-98 parts by weight of methyl methacrylate monomer, 1-49 parts by weight of an aromatic vinyl monomer and 1-10 parts by weight of an unsaturated organic acid.
Patent KR-20040067574-A (KR)
Inventor: BAEK EUNG RYUL
IPC: C08L29/04
Filed: 2003-01-24
Abstract: PURPOSE: Provided is a binder used in a powder injection molding process for retaining the shape of a molded body until a sintering step, which is excellent in retention for the shape of a molded body, and reduces the time needed for a solvent degreasing step to improve the productivity. CONSTITUTION: The high-strength water soluble binder capable of degreasing at a high speed is used in a powder injection molding process using inorganic powder, including metal powder, super hard powder, ceramic powder or alloy powder, having an average size of 0.1 to 100 micrometers. The binder comprises a water soluble polyethylene glycol having a molecular weight of 1,500-20,000 and a water insoluble adhesive resin formed of a polyolefin to which polar groups are imparted. The binder comprises 20-80 wt% of the adhesive resin and 80-20 wt% of the polyethylene glycol, wherein the water soluble binder component is removed in water at 20-80 deg.C and the water insoluble polymer component is removed by thermal decomposition.
Patent KR-20040071568-A (KR)
Inventor: JEON HO SEOK
IPC: H05K3/00
Filed: 2003-02-06
Abstract: PURPOSE: A method is provided to achieve improved temperature stability and prevent defects of printed circuit boards by manufacturing a board for printed circuit board drilling from a urethane material. CONSTITUTION: A method comprises a step(S1) of preparing a urethane mixture by mixing urethane and hardening agent at the ratio of 100 to 20 to 200; a step(S2) of heating a mold for manufacture of urethane board for printed circuit board to the temperature of 30 to 70 Deg.C; a step(S3) of injecting the urethane mixture into the mold; a step(S4) of hardening the urethane mixture; a step(S5) of extracting the hardened urethane board; and a step(S6) of performing a post-process.
Patent KR-20040074325-A (KR)
Inventor: HWANG CHAN SU
IPC: H04L27/26
Filed: 2003-02-17
Abstract: PURPOSE: A method for reducing a PAPR(Peak to Average Power Ratio) in a MIMO(Multiple Input Multiple Output) antenna OFDM(Orthogonal Frequency Division Multiplexing) communication system is provided, which integrates a space-time coding technique and the PAPR reducing technique. CONSTITUTION: A PAPR reducing part(250) encodes inputted serial signal sequence to reduce PAPR using a Golay code. A space-time coding part(260) encodes the serial signal sequence into N signal sequences to transmit them to N antennas. A serial-to-parallel transformer(200) transforms the serial input sequence into parallel sequence. An IFFT transformation part(210) transforms an input QAM symbol into an OFDM signal. A parallel-to-serial transformer(220) transforms the parallel OFDM signal into a serial OFDM signal. A cyclic prefix adder(230) extends the OFDM symbol cyclically, by inserting a cyclic prefix to a guard interval of the OFDM signal.