baber/WOPTO huggingface dataset:
Patent KR-20000058356-A (KR)
Inventor: KIM DONG ARM
IPC: G06F17/00
Filed: 2000-04-29
Abstract: PURPOSE: An apparatus and a method for accessing the internet, so easy that an internet beginner can access the internet and find out information, are provided. CONSTITUTION: An apparatus for accessing the internet is comprised of a server host(200), a supplier server(300), a supplier homepage(600), a management DB(500) and a classification and search file(700). The classification and search file(700) is formed by gradationally dividing a catalogue classified according to a required classification method. The classification method is composed of a first sub classification to a Nth sub classification, including a main classification. The main classified catalogue is classified into th internet, family life, education institutes, shopping, etc., on the basis of ordinary social life. Each main classification is segmented in the first sub classification further in detail. Each catalogue of the first sub classification is segmented in the second sub classification further in detail.
Patent KR-20010103498-A (KR)
Inventor: KIM HYEOK
Filed: 2000-05-10
Abstract: 본 발명은 자동차 전륜구동축의 인보드 조인트(inboard joint)에 설치되는 부트(boot)에 관한 것으로서, 후단에 구동축과 결합되는 구동축 고정단을 가지며 선단으로 갈수록 확경되는 주름이 배열되는 부트부와, 상기 부트부의 선단에 일체로 형성되며 선단에 조인트 하우징과 결합되는 하우징 고정단을 갖는 리테이너부로 구성되는 특징이 있으며, 이러한 본 발명에 따르면 하우징과 결합되는 리테이너와 부트를 일체형으로 형성함으로써 부품수를 줄여 전체 구조를 간소화할 수 있게 되는 것이다.
Patent KR-20010105729-A (KR)
Title: Semiconductor memory device
Inventor: CHO YEONG OK
IPC: G11C8/20
Filed: 2000-05-17
Abstract: The present invention relates to hypochlorite bleaching compositions which comprise a phosphate ingredient, for improved fabric whiteness and improved fabric safety.
Patent KR-20010108631-A (KR)
Inventor: CHOI SANG BIN
IPC: H02M1/10
Filed: 2000-05-30
Abstract: 본 발명은 AC입력전원을 정류한 후 소정레벨의 정전압으로 조정하고 나서 위상제어를 위한 트리거신호를 생성하는 정전압부와, 상기 트리거 신호에 의해 AC입력전원을 위상 제어하면서 이를 정류 평활하는 정류 평활부 및 시작 및/또는 정지 스위치의 위치에 따라 상기 정류 평활부에서 모터로 공급되는 전원을 조절하는 모터 구동 제어부로 구성된다. 본 발명에 의하면, AC전원의 입력레벨에 관계없이 전동모터에 공급되는 전원을 일정한 레벨로 정류 평활하면서도 정전압 장치에서 발생되는 열을 극소화할 수 있는 것이다.
Patent KR-20000063249-A (KR)
Inventor: WOO BOO GOO
Filed: 2000-06-05
Abstract: PURPOSE: A system is provided to exempt from answering telephone, fax and e-mail after a trading of a product or service is completed by discriminating the product or service with its reference identifier. CONSTITUTION: Each of products or services to be sold are attached with their own reference identifiers by using coding, product numbering or product classification. A server connects buyers and sellers. When the product is sold, the seller can input an information notifying that the product is sold. Then, the server does not connect telephone, fax and e-mail to the seller. Buyers need not unnecessarily contact the seller since the server connects the buyers to the seller when there are some product left to be sold.
Patent KR-20020001020-A (KR)
Title: the Apparatus and Method for Decomposing Volatile Organic Compound
Inventor: AN BYUNG JU
IPC: B01D53/86
Filed: 2000-06-23
Abstract: PURPOSE: An apparatus and method for decomposing volatile organic compound are provided, which convert volatile organic compounds such as tri-chloro ethylene, xylene and benzene into harmless gas by irradiating ultraviolet ray in a photocatalyst chamber. CONSTITUTION: The apparatus comprises a horizontal tubular chamber(1) having an inlet(5) at the top and an outlet(7) at the bottom of the other end. A photocatalyst that is made of a semiconductors of titanium dioxide is applied on the inner surface of the chamber and into which a tubular polarized light part(9) of a U.V. lamp irradiating 184.9 to 253.7 nm band ultraviolet ray is centrally inserted.
Patent KR-20020000589-A (KR)
Title: Coupling method of a pin for personal ornaments and apparatus thereof
Inventor: WON JONG HA
IPC: A44C7/00
Filed: 2000-06-24
Abstract: PURPOSE: A method and an apparatus for connecting pins of an accessory are provided to achieve the mass production of the accessory, and to reduce the cost of manufacture thereof. CONSTITUTION: The method for connecting pins of an accessory comprises the steps for inserting resin made pins(40) into plural holes formed along the bottom edge of an upper mold(10); coupling the upper mold and a lower mold(20) by making the other ends of the pins be inserted into decorative holes of the lower mold; rotating the upper mold and the lower mold; making molten lead be injected from lead injection holes of the upper mold to the decorative holes of the lower mold through dispersion grooves and plural molten lead guide grooves of the lower mold; separating the upper mold with the lower mold after completing the injection of the molten lead; and removing the accessory integrated with the resin made pins and any decorations from the separated lower mold.
Patent KR-20020003051-A (KR)
Inventor: JUNG WOO HYUB
IPC: A61N1/32
Filed: 2000-06-30
Abstract: PURPOSE: A bed with a low frequency therapy unit is provided to maximize the convenience of use and the function of the bed and the therapy unit by simultaneously using the bed and the low frequency therapy unit. CONSTITUTION: The bed, for example a healthy bed, and the low frequency therapy unit are contained in a same body(10), and an electric power supply device(11) is used to receive the power from the outside. A main power source(1) manages the main power of the body, and a display light(2) for informing the operation of the power is provided. A power source(3) for the bed and the low frequency therapy unit, a display light(4) and an operating switch(5) for the low frequency therapy unit are provided. Also, a low frequency treatment terminal(500) directly contacting with the human body is used to transmit the oscillation generated from a low frequency oscillation control part(7) mounted on the body toward the human body. A low frequency connection terminal(30) is provided to connect the low frequency treatment terminal with the body.
Patent KR-20010015209-A (KR)
Inventor: WASHINO KIYOSHI
IPC: G06K19/077
Filed: 2000-07-06
Abstract: PURPOSE: To provide an integrated circuit built-in card having a structure that a metallic panel can reliably be grounded, while using a connector which can be used in common for cards having different thicknesses. CONSTITUTION: A 1st metallic panel 7 has a connection piece 41 for the ground going through in the front end rod of an upper resin frame 5 and extending up to a position, where the piece 41 is contactable to a 1st conductive piece 29 for the ground on the bottom face 5a of the frame 5. A connector 4 is provided with 1st and 2nd conductive pieces 29 and 30 for the ground electrically connected to 28A and 28B, respectively. The 1st piece 29 is brought into elastic contact with the piece 41, and the 2nd piece 30 is pressured to the inner face of a 2nd metallic panel 8. Thus, the electric connection between the pieces 29 and 41 and the electric connection between the piece 30 and the panel 8 are obtained.
Patent KR-20000059104-A (KR)
Inventor: HNA JAE MYUNG
IPC: E02D29/12
Filed: 2000-07-14
Abstract: PURPOSE: A manufacturing method of a manhole is provided to offer the manhole which is jointless, has good quality of outward appearance, and make a manhole cover be the same height as the upper surface of a manhole, thereby a simple construction and an economic cost for construction are guaranteed. CONSTITUTION: A manufacturing method of a manhole(10) comprises the steps of: making a mold(11) of which the side and the upper surface are closed; turning the mold(11) upside down; pouring some concrete into the mold(11) and curing the concrete surface; removing the mold(11); turning the cured concrete upside down; pouring concrete to shape the bottom through the opening of the cured concrete; curing the bottom concrete.
Patent KR-20020010286-A (KR)
Title: Product Design System And Method Using Internet
Inventor: PARK BU IL
Filed: 2000-07-29
Abstract: PURPOSE: A system and a method for a product design using the Internet are provided to enhance a satisfaction of a client with respect to a product by enabling a user to select or design a wanted design directly and to perform an effective sale by manufacturing a product of a client wanted design, thereby decreasing stored goods. CONSTITUTION: If a client connects to a web server and inputs a design-wanted product, types with respect to the product is displayed and the client selects a wanted-product type out of the displayed types(S101). It is decided whether the client designs the selected product type directly or selects an existed design product(S102). It is decided whether the client designs a product by transforming an existing model or designs a product newly when the client designs a product(S103). If a purchase intention with respect to the product designed or selected by the client is existed, an ordering process is performed by inputting a member ID and password. In case of a non-member, an ordering process is performed after a member joining process is completed(S104).
Patent KR-20020011253-A (KR)
Inventor: PARK JIN HUI
IPC: C12N1/20
Filed: 2000-08-01
Abstract: PURPOSE: A strain for decomposing high concentration toluene higher than 1500ppm, Rhodococcus rhodochrous HPLT-1 (KFCC-11169), shows excellent bioremediation effects for toluene contaminated soil over wide range of pH(pH4-7) and is able to culture in both aerobic and anaerobic condition. CONSTITUTION: Rhodococcus rhodochrous HPLT-1 (KFCC-11169) is isolated in MSM(minimum salt medium) comprising Na2HPO4·12H20 9g/L, KH2PO4 1.5g/L, MgSO4· 7H2O 0.2g/L, NH4Cl 1.0g/L, FeSO4·7H2O 0.1g/L, CaCl2·2H2O 0.1g/L, ZnSO4·7H2O 10mg/L, MnCl·4H2O 3mg/L, H3BO3 30mg/L, CoCl2·6H2O 20mg/L, CuCl·6H2O 0.56mg/L, NiCl·6H2O 2mg/L, NaMoO4·2H2O 10mg/L.
Patent KR-20010049966-A (KR)
Inventor: TOWFIGHI KAVEH
IPC: C10L3/00
Filed: 2000-08-02
Abstract: PURPOSE: A fuel gas for a machine tool driven by combustion power is provided, for an apparatus for the driving of a stationary element, easily available at a low cost, free from toxicity, having necessary combustion energy, enabling the proper control of the combustion energy, usable even at a low temperature and enabling the rigorous keeping of an aerosol restriction. CONSTITUTION: A fuel gas is based on a combustible gas composed of a mixture of (A) 40-70 wt.% dimethyl ether, dinitrogen monoxide and/or nitromethane, (B) 8-20 wt.% propylene, methylacetylene, propane and/or propadiene and (C) 20-45 wt.% isobutane and/or n-butane.
Patent KR-20000063792-A (KR)
Title: 웹 ｄｂ를 이용한 서버/클라이언트 교육 통합 소프트웨어알고리즘 및 비지니스모델
Inventor: CHOI HEUN HO
IPC: G06Q50/20
Filed: 2000-08-01
Abstract: 본 발명은 웹 데이터베이스를 이용한 서버/클라이언트 교육 통합 소프트웨어에 관한 알고리즘과 시스템으로, 더욱 상세하게는 교육의 삼자매체인 선생님, 학생, 학부모를 네트워크 시설로 연결하는데 학내 전박적인 내용인 학생 성적처리에서 수행평가와 지필평가, 선생님 개인의 일,주,월 스케줄, 각 학생의 담임상담 및 전문상담, 학생 관련정보, 학부모 관련정보, 원거리 교육 및 창의적 교육, 학내 급식, 가정 통신문, 건강일지, 학내 동호회를 편집, 입력, 저장, 전송 방식이 두가지 방법인 선생님측 클라이언트 소프트웨어에서 On-Line과 Off-Line 방법으로 관리하고 이용하여 가정의 학부모와 학생에게 모든 정보를 개방 및 부분 차단을 할수 있게 하는 소프트웨어 설계 알고리즘 및 비즈니스 모델 형식이다. 
     이를 위하여 본 발명은, 교육계에서 이루어지는 학내 전 과정 및 내용을 On-Line과 Off-Line으로 정보를 공유 및 차단함에 있어서 선생님측에서 정보를 제공해 줄수 있는 형성방식이 On-Line과 Off-Line이라는 두가지 테마의 정보공유 및 차단 형성단계, 상기 정보제공 중 학생 정보관리는 On-Line상에서 각 선생님께 부여된 아이디를 통해 관련 학생에게 제공되어지는 학생 임시 아이디(Temporary ID)를 갖는 학생이 직접 초기정보를 입력하여 학생이 실제 아이디를 부여받고 선생님께 자기정보를 제공하여 선생님은 이러한 정보를 클라이언트 소프트웨어를 통해 받음으로써 off-Line상에서 손쉽게 작업를 할수 있는 초기입력 형성단계, 상기 단계후 입력 되어진 학생정보에 대해 Off-Line 상에서 선생님이 각 학생 개인에 대한 정보인 성적처리, 가정 통신문, 담임상담 및 전문상담에 대한 정보 공유 문제를 결정하여 On-Line 상에서 가정에 학부모와 학생이 관련정보를 열람할수 있게 해주는 웹 데이터베이스 형성단계, 상기 단계 이외에 학내에서 이루어지는 모든 관련 행사 및 제도, 선생 개인 일정등을 Off-Line과 On-Line 상에서 테이타를 저장할수 있고 이런 정보를 공유하게 될 학부모들은 가정에서 학생의 대한 정보 및 상담을 인터넷을 통해 요청하면 선생님과 학부모, 학생간의 정보공유 및 대화가 이루어질수가 있는 형성단계, 상기 단계와는 별도로 실행되어지는 원거리 교육 체제는 화상, 감각, 챗팅, 음성, 가상칠판을 통해 교육의 진행자와 수해자간의 수월한 교육을 할 수가 있으며 특히 진행자가 다수의 수해자 중 특정인에게 발언권을 부여하여 발언권을 부여받은 수혜자가 질문이나 답변을 할 수 있게 해주는 과정단계, 상기 단계와 더불어 교육의 수혜자인 학생이 담임 선생님이나 과목 선생님에게 수업 만족을 못할 경우 학생이 On-Line을 통해 수업과외를 본 시스템과 연계된 선생님에게 신청하면 신청을 확인한 Off-Line에 있는 선생님들이 그 학생의 수용여부를 판단하여 통합 소프트웨어를 통해 학생에게 통보해 주는 과외시스템 형성단계, 상기 단계에서 교육의 창의력을 높일수 있도록 도와주는 컨텐츠는 만화대본 만들기 프로그램이다. 이는 선생님의 한 대본의 주제를 설정한 다음 각 학생들이 번호순데로 돌아가며 주제에 대한 이야기를 짜맞추어 만화대본을 만드는 교육 프로그램으로 다 완성되어진 대본을 선생님이 서버에서 전송받아 편집하여 다시 서버에 전송 해주면 이 대본을 플래쉬로 작업하여 만화로 만들어 주는 기능이 특징적이다.
Patent KR-20020016735-A (KR)
Title: Method for accessing to subscriber of server providing computer network access service
Inventor: SON BYEONG CHEOL
IPC: G06F17/00
Filed: 2000-08-26
Abstract: PURPOSE: A method for accessing a terminal subscribed to a server providing computer network access is provided to allocate an IP address to a personal user host which does not have a fixed ID address and to enable access to the personal user host from another host, regardless of a change of IP addresses. CONSTITUTION: A host user, who wants to access a personal subscriber host, attempts access using the personal subscriber host's domain name server(202) and requests name service to the DNS(Domain Name Service) server of a domain to which he belongs(204). If an IP address for a requested domain name exists, the DNS server informs the user of it(206). However, in case that the DNS server has no information about the requested domain name, the DNS server requests name service to another DNS server, or the DNS server of an IASP(Internet Access Service Provider)(208). In response to the request, the DNS server of the IASP searches a name DB for an associated IP address and transfers it to the host user(210). The host user attempts access to the personal subscriber host using the obtained IP address(212).
Patent KR-20010067135-A (KR)
Title: Stable bis(trifluoromethyl)amide salts and process for preparing them
Inventor: IGNATIEV NICOLAI
IPC: C07F9/54
Filed: 2000-08-31
Abstract: PURPOSE: Provided are a stable (CF3)2N- salt for a lithium ion battery or the like and a method for producing the salt and a method for introducing (CF3)2N- into organic compounds using the salt. CONSTITUTION: The trifluoromethylnitro compound is prepared in a high yield from an alkali salt and a cationic trialkyl or triaryl salt. The compound of formula:£(R1(CR2R3)k)1AxKt|+-N(CF3)2 where Kt = N, P, As, Sb, S or Se; A = N, P, P(O), O, S, S(O), SO2, As, As(O), Sb or Sb(O); R1 - R3 = H, halogen, CnH2n+1, C1-18 alkenyl, C1-18 alkynyl, CmH2m-1, phenyl or heteroaryl; n = 1-18; m = 3-7; k = 0-6; l = 1 or 2 when x = 1 and 1 when x = 0; x = 0 or 1; and y = 1-4. The preparation of the above compound comprises reacting an alkali salt of formula:D+-N(CF3)2n1 with a salt of formula:£(R1(CR2R3)k)1AxKt|+-E an organic polar solvent where D = alkali metal; and E = F, Cl, Br, I, BF4, ClO4, AsF6, SbF6 or PF6.
Patent KR-20020019726-A (KR)
Title: Membership restaurant business operation method
Inventor: LEE YOUNG HWAN
Filed: 2000-09-06
Abstract: PURPOSE: A method for operating a members-only restaurant business is provided so that customers can enjoy food inexpensively and a manager of the restaurant can raise the incomes even though selling the food at a low price. CONSTITUTION: An operating enterprise(1) leads a plurality of customers to get a membership subscription through a special public relation or various events(S1). The operating enterprise(1) provides a maintenance subsidy to each chain restaurant(S2). Each chain restaurant(2) provides foods to the members(3) at a low price(S3).
Patent KR-20020020508-A (KR)
Inventor: CHOI GIL HYEON
IPC: C23C16/54
Filed: 2000-09-09
Abstract: PURPOSE: A chemical vapor deposition apparatus is provided which is capable of solving problems of deposition of a metallic thin film or formation of particles due to decomposition of a precursor at a precursor storage container or a precursor delivery pipe. CONSTITUTION: The chemical vapor deposition apparatus comprises a precursor storage container(11) in which metallic atoms are contained, and which is capable of storing a precursor having selective deposition characteristics according to a kind of a substrate; and a precursor delivery unit delivering vapor of the precursor from the precursor storage container(11) into a chamber(13), wherein the precursor storage container(11) and the precursor delivery unit are made of a material which is neither decomposed by nor reacted with the precursor, the precursor is DMAH(dimethylaluminum hydride), DMEAA(dimethylethylamine alane), TMA(trimethyl aluminum), TMAA(trimethylamine alane), TEAA(triethylamine alane), MPA(methylpyrrolidine alane), Cu(HFAC)2, or Cu(HFAC)(TMVS), the precursor delivery unit is a gas line(15), valve(17), mass flow controller, vapor flow controller(19), or liquid delivery system, the material which is neither decomposed by nor reacted with the precursor is a dielectric ceramic material such as silicon dioxide(SiO2), alumina(Al2O3), zirconia(ZrO2) or TiO2(titania), or an organic material such as Teflon, the material which is neither decomposed by nor reacted with the precursor is formed by coating a dielectric protection film on a metallic material, the dielectric protection film is made of a ceramic material or an organic material such as Teflon, the material which is neither decomposed by nor reacted with the precursor is formed by coating a protection film obtained by coating a film material having strong oxidative property on a metallic material, and wherein the film material having strong oxidative property is Al, Si, Ti, Zr, Y, Ni, or Co.
Patent KR-20000072745-A (KR)
Inventor: JUNG JEONG SEOP
IPC: G06Q30/00
Filed: 2000-09-23
Abstract: PURPOSE: A method for managing moving picture data and a provider of the data on a data communication network is provided to encourage the provider to manufacture the moving picture with good quality, by making the provider have a root-tree structure on the web site of the internet according to an order in registration, giving an interest to the provider registered prior to others, and putting a popular ranking of the moving picture onto a main window of the web site. CONSTITUTION: A web site is provided on the data communication network like the internet(ST1). The provider of the moving picture data accesses the web site to request registration as a member(ST2). The provider remains as a free root member for a certain period, and has a position for providing the moving picture data(ST3). The provider may be a tree member under the approval of a root member(ST4). If the root member collects some tree members, he/she is given points like cyber-money(ST5). The provider obtains the points according to the popularity of the data supplied by him/her, and the root member receives a part of the points obtained by the tree members(ST6).
Patent KR-20020030864-A (KR)
Title: Method and apparatus for recognizing automatic in ps2 mouse and serial mouse
Inventor: LEE GEUN SEOK
IPC: G06F3/00
Filed: 2000-10-18
Abstract: PURPOSE: A method and a device for automatically recognizing a PS/2 mouse and serial mouse are provided to enable a receiver to provide respective signals outputting from a wireless keyboard and mouse to a PC by making the receiver automatically recognizing a connection of the PC and a PS/2 keyboard line, a PS/2 mouse line and a serial mouse line. CONSTITUTION: The device comprises a wireless keyboard(10), an AC-IR6(InfraRed) receiver(20) and a PC(30). The wireless keyboard transmits a code signal by pressing a button desired by a user to the AC-IR6 receiver through the IR. The AC-IR6 receiver is equipped with a PS/2 keyboard line(A), a PS/2 mouser line(B) and a serial mouse line(C) connecting to a microcomputer(21) in order to match with the PC, and is equipped with an IR receiving port(D) to receive various signal outputting from the wireless keyboard and a jumper(E) to select whether the keyboard has 103 keys or 102 keys. The microcomputer provides the received code signal to the PC through respective lines after receiving the code signal and mouser coordinate signal from the wireless keyboard through the IR receiving port, and automatically recognizes on the basis of a condition of Rx and RTS check part in the serial mouse line whether the PS/2 or serial mouse line is connected.
Patent KR-20010070157-A (KR)
Title: BGA-type Semiconductor device
Inventor: KIMURA NAOTO
IPC: H01L23/28
Filed: 2000-10-20
Abstract: PURPOSE: To obtain a chip-size BGA semiconductor device where a first wiring which connects the pad and bump of a chip together and a second wiring formed on a mounting board or an intra-chip wiring hardly interfere with each other after the semiconductor device is mounted on the mounting board. CONSTITUTION: A BGA semiconductor device is equipped with a chip 2, a first polyimide film 4 which covers all the surface of the chip 2 except bonding pads 3, lands 5 mounted with outer connecting balls and formed at prescribed positions on the polyimide film 4, wirings 6 which are formed on the first polyimide film 4 to connect the pads 3 and the lands 5 together, a second polyimide film 7 which covers all the surface of the chip 2 except the lands 5, a first copper film 8 formed on the second polyimide film 7, a coating resin film 9 formed on the first copper film 8, and solder balls 10 bonded on the lands 5.
Patent KR-20020031674-A (KR)
Title: Driveway for rapid transit
Inventor: FLESSNER HERMANN C
IPC: E01B21/00
Filed: 2000-10-23
Abstract: PURPOSE: A roadway for a rapid transit is provided to prevent unbalance of supporters and to manufacture concrete with high rotary force when centrifugal-molding. CONSTITUTION: The roadway for a rapid transit contains: at least one reinforcement type hollow PS(prestressed) concrete-longitudinal girder provided with an upper supporting shoulder(4) and formed by PS concrete stay pipes(2) manufactured in a centrifugal molding method; and a roadway plate(3) comprising many short plates fixed on the PS concrete stay pipes(2), crossing prefabricated roadway girders arranged on the lower support and the roadway and supporting the PS concrete-longitudinal girder.
Patent KR-20010051218-A (KR)
Inventor: ISHII MAKOTO
IPC: H04L12/70
Filed: 2000-10-24
Abstract: PURPOSE: To provide a data receiver that can transfer only data that are correctly decoded to a connected host computer in a satellite transmission service or the like. CONSTITUTION: The data receiver extracts required data from received digital signal data, decodes the extracted received data by using a prescribed decoding key, discriminates the correctness of the decoded data and aborts corresponding received data when the discrimination indicates that the decoded data are not correctly decoded.
Patent KR-20020032703-A (KR)
Title: Method of manufacturing an electro static discharge protection device
Inventor: JANG YUN SU
IPC: H01L27/04
Filed: 2000-10-26
Abstract: PURPOSE: A method for fabricating an electrostatic discharge(ESD) protection device is provided to prevent a current crowding effect from occurring in a relatively shorter base region due to an unbalanced field oxide layer during a bipolar action and thereby to improve ESD protection reliability. CONSTITUTION: In the ESD protection device employing a field transistor, the field oxide layer(12) is formed in LOCOS form. Next, an ion implantation process is performed for forming active regions(20,30,40). Here, contrary to a conventional mask exposing the field oxide layer as well as the active regions, an ion implantation mask(70) exposes the active regions(20,30,40) only, especially except irregular boundaries with the field oxide layer(12) caused by bird's beak. Therefore, a length(BL) of the base region becomes uniform in all the active regions(20,30,40), so that the current crowding effect does not occur in the bipolar action.