• Title/Summary/Keyword: Non-punch through

Search Result 39, Processing Time 0.03 seconds

The Optimal Design of High Voltage Non Punch Through IGBT and Field Stop IGBT (고전압 Non Punch Through IGBT 및 Field Stop IGBT 최적화 설계에 관한 연구)

  • Kang, Ey Goo
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
    • /
    • v.30 no.4
    • /
    • pp.214-217
    • /
    • 2017
  • An IGBT (insulated gate bipolar transistor) device has an excellent current-conducting capability. It has been widely employed as a switching device to use in power supplies, converters, solar inverters, and household appliances or the like, designed to handle high power. The aim with IGBT is to meet the requirements for use in ideal power semiconductor devices with a high breakdown voltage, an on-state voltage drop, a high switching speed, and high reliability for power-device applications. In general, the concentration of the drift region decreases when the breakdown voltage increases, but the on-resistance and other characteristics should be reduced to improve the breakdown voltage and on-state voltage drop characteristics by optimizing the design and structure changes. In this paper, using the T-CAD, we designed the NPT-IGBT (non punch-through IGBT) and FS-IGBT (field stop IGBT) and analyzed the electrical characteristics of those devices. Our analysis of the electrical characteristics showed that the FS-IGBT was superior to the NPT-IGBT in terms of the on-state voltage drop.

Transient Characteristics of NPT-IGBT with different temperatures (온도 변화에 따른 NPT-IGBT의 과도 특성)

  • 류세환;황광철;안형근;한득영
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2002.07a
    • /
    • pp.292-295
    • /
    • 2002
  • In this work, transient characteristics of NPT(Non Punch Through)-IGBT(Insulated Gate Bipolar Transistor) have been studied with different temperatures analytically. Power losses are caused by heat generated in MIT-IGBT for steady state and transient state conditions. We therefore have focused on the analysis of excess carrier concentration and excess charge injected into N-drift layer with different temperatures and have obtained anode voltage drop during turn-off with lifetime of 2.4[${\mu}$s].

  • PDF

A Study on Improvement of Formability for Deep Drawing Process (디프 드로잉 공정의 성형성 향상에 관한 연구)

  • 최병근
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 1999.03b
    • /
    • pp.70-76
    • /
    • 1999
  • Recently most of researches for deep drawing process using sheet metal have been performed on the formability of axisymmetric shape but there have not been any concrete reports on the formability of non-axisymmetric shape In addition the conventional shape radius of the punch and die has been determined by the trying-and-error using industrial experimence and post processing test and only approximate shape radius of the punch and die has been determined by the trying-and-error using industrial experience and post processing test and only approximate shape radius of the punch and die has been present So in this study the optimal shape radius of the punch and die in deep drawing process with biaxisymmetric blank shape would be proposed. Through the deep drawing experiment it is found that in order to obtain the optimal products especially shape radius of the punch and die in all processes is very important.

  • PDF

A Stud on Punch and Die Shape Radii of Non-Axisymmetric Deep Drawing Product (비축대층 디프 드로잉 제품의 펀치 및 다이 형상반경에 관한 연구)

  • 배원락
    • Proceedings of the Korean Society for Technology of Plasticity Conference
    • /
    • 2000.04a
    • /
    • pp.92-95
    • /
    • 2000
  • In order to obtain the optimal products in deep drawing process elliptical deep drawing tests were carried out with several shape radii of the punch and die. As parameters on testing shape radii of the punch and die were selected, In addition the conventional shape radii have been determined by trial=and-error using industrial experience and post processing test and only approximate shape radii of the punch and die have been presented. The optimal shape radii of the punch and die in elliptical deep drawing process with biaxisymmetric blank shape are proposed. In this study we suggest the appropriate conditions to be applicable to the catual manufacturing processes through the experiment and finite element method.

  • PDF

Analysis of Sheet Metal Forming for Non-Axisymmetric Deep Drawing Products (비축대칭 디프 드로잉 제품의 박판 성형 해석)

  • 박동환;배원락;강성수
    • Transactions of Materials Processing
    • /
    • v.10 no.3
    • /
    • pp.185-192
    • /
    • 2001
  • In order to obtain the optimal products in deep drawing process, elliptical deep drawing tests were carried out with several shape radii of the punch and die. As parameters on testing, shape radii of the punch and die were selected. In addition, the conventional shape radii have been determined by trial-and-error using industrial experience and post processing test, and only approximate shape radii of the punch and die have been presented. The optimal shape radii of the punch and die in elliptical deep drawing process with biaxisymmetric blank shape are proposed. In this study, we suggest the appropriate conditions to be applicable to the actual manufacturing processes through the experiment and finite element method.

  • PDF

An Experimental Study on Improvement of Formability for Elliptical Deep Drawing Process (타원형 디프 드로잉 공정의 성형성 향상에 관한 실험적 연구)

  • 박동환;박상봉;강성수
    • Transactions of Materials Processing
    • /
    • v.9 no.2
    • /
    • pp.120-127
    • /
    • 2000
  • Recently, most of researches for sheet metal deep drawing process have been performed on the formability of axisymmetric shape, but there are not any concrete reports on the formability of non-axisymmetric shape. In addition, the conventional shape radius of the punch and die has been determined by trial-and-error using industrial experience and post processing test, and only approximate shape radius of the punch and die has been presented. In this study, the optimal shape radius of the punch and die in deep drawing process with biaxisymmetric blank shape is proposed. Through the deep drawing experiment, especially it is found that in order to obtain the optimal products, and improvement of formability can be researched by selection of such punch and die shape radius that gives an adequate thickness distribution in all processes.

  • PDF

Fabrication of Ultrathin Punch by Electrochemical Process (전해 프로세스에 의한 초미세 펀치의 제작)

  • Lim, Hyung-Jun;Lim, Young-Mo;Kim, Soo-Hyun;Kwak, Yoon-Keun
    • Proceedings of the KSME Conference
    • /
    • 2000.04a
    • /
    • pp.792-796
    • /
    • 2000
  • With the development of micro machining, it becomes an important part to fabricate an electrode which has tens of ${\mu}m$ or less. There are two methods to get a narrow hole; non-contact type such as EDM(Electro-discharge machining) and contact type such as punching. A punch which has a tapered shape with a cylindrical tip is fabricated in this paper. To make this punch, a method which was used to fabricate a cylindrical shape by electrochemical process was applied. The control factors for the shape and their limits are verified through an experiment.

  • PDF

Analysis of excess minority carrier and charge wish lifetimes in N-dirft region of NPT-IGBT (수명시간에 따른 NPT-IGBT의 N-drift 영역에서의 과잉소수 캐리어와 전하량 분석)

  • 류세환;이용국;안형근;한득영
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2001.07a
    • /
    • pp.844-847
    • /
    • 2001
  • In this work, transient characteristics of the Non-Punch Through(NPT) Insulated Gate Bipolar Transistor(IGBT) has been studied. we has analyzed with lifetimes excess minority carrier injected into N-dirft, base region of IGBT's BJT part and accumulated charge of on-state which affected swiching characteristic. In this paper, excess minority carrier and charge distribution in active base region is expressed analytically. This analysis proposed optical trade-off between lifetimes and accumulated charge for decreasing switching losses because charge result in switching loss when device was tuned off.

  • PDF

Modeling transient characteristics of NPT IGBT including trun-on condition (턴 온 상태를 고려한 NPT IGBT의 과도 특성 모델링)

  • Ryu, Se-Hwan;Lee, Yong-Kuk;Ahn, Hyoung-Keun;Han, Deuk-Young
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
    • /
    • 2003.07a
    • /
    • pp.327-330
    • /
    • 2003
  • In this work, current-voltage characteristics with time of NPT(Non-PunchThrough) IGBT is proposed during turn-on and turn-off by using analytical method. From the results, power loss at turn-off dominates the total electrical loss with respect to that at turn-on. The results have been compared with those of PSPICE and show the identical trend of power loss with each other.

  • PDF

Study on the Influence of Die Corner Radius for Deep Drawing of Elliptical Product of Automobile (자동차용 타원형 디프 드로잉 제품의 다이 반경에 관한 연구)

  • 허영민;박동환;강성수
    • Transactions of Materials Processing
    • /
    • v.11 no.8
    • /
    • pp.668-675
    • /
    • 2002
  • The circles deform into various shape during deformation, the major and minor axes of which indicate the direction of the major and minor principal strains. Likewise, the measured dimensions are used to determine the major and minor principal strain magnitudes. This circular grid technique of measuring strains can be used to diagnose the causes of necking and fracture in industrial practice and to investigate whether these defects were caused by material property variation, changes in lubrication, of incorrect press settings. In non-axisymmetric deep drawing, three modes of forming regimes are found: draw, stretch, plane strain. The stretch mode for non-axisymmetric deep drawing could be defined when the major and minor strains are positive. The draw mode could be defined when the major strain is positive and minor strain is negative, and plane strain mode could be defined when the major strain is positive and minor strain is zero. Through experiments the draw mode was shown on the wall and flange are one of a drawn cup, while the plane strain and the stretch mode were on the punch head and the punch corner area respectively, We observed that the punch load of elliptical deep drawing was decreased according to increase of die corner radius and the thickness deformation of minor side was more large than major side.