电子信息技术专业英语 教学课件 作者 丁宁 Unit2Semiconductor.ppt

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1、Unit2Semiconductor半导体(1)Themainideaofthisunit:Thisunitismainlydiscussthebasicknowledgeabout“semiconductor”.(1)Materialscanusuallybedividedintoconductor,semiconductorandnonconductor.(2).Theirelectricalpropertiesalteredbythecontrolledadditionofverysmallquantitiesofimpuritiessuchas

2、boronorphosphorus.一.NEWWORDS1.circuitn.电路Aclosedpathfollowedorcapableofbeingfollowedbyanelectriccurrent.电路：一个通过电流或可通过电流的封闭路径2.substancen.(1)Thatwhichhasmassandoccupiesspace;matter.物体：有质量及占据空间的东西；物质(2)Materialpossessions;goods;wealth:财产；物品；财富：apersonofsubstance.富有的人3.insulatorn.绝

3、缘体(nonconductor)Amaterialthatinsulates,especiallyanonconductorofsound,heat,orelectricity.绝缘体：绝缘材料，特别是声、热、电的非导体4.siliconn.[化]硅5.electricaladj.电的，电气的6.conductivityn.传导性，导电性Electricalconductivity电导性7.Switch(1)n.开关lightswitch(2)v.切换Theofficehasswitchedfromtypewriterstowordprocessors

4、.办公室已把打字机换成了文字处理器8.performvt.履行,执行，表演(1)performone'scontractualobligations.履行合同规定的义务(2)Thetheatergroupperformedathree-actplay.剧团排演了一出三幕剧9.Instructionn.指示,指令，说明书computerinstruction计算机指令10.devicen.器件,装置，设备Machinedevice机器设备11.dioden.二极管Anelectronicdevicethatrestrictscurrentflowchie

5、flytoonedirection.二极管：将电流主要限制于一个方向的电子设备.12.dopevt.向……内加物质dopesugarintocoffee向咖啡里加糖13.propertyn.性质，特性amedicinewithspecialproperties.具有特殊性能的药14.alterv.Tochangeormakedifferent;modify:变更，更改alteredmywill.修改我的遗嘱15.boronn.[化]硼16.phosphorusn.[化]磷17.impurityn.杂志，不纯18.junctionn.连接，结Theact

6、orprocessofjoiningortheconditionofbeingjoined.连接，接合：联结的行为、过程或被接合在一起的状态19.restrictvt.限制，约束，限定Thistestisrestrictedfromchapter1tochapter5.这次考试内容限制在第一章到第五章。二、Expressions:1.accordingto根据……2.applyto将……应用于3.referto提到，指三、Questionfortextdiscussion1.Materialscanusuallybedividedintothreety

7、pes,whatarethey?Conductor,semiconductorandnonconductor,orinsulator.2.Givesomeexamplesaboutsemiconductorsmaterials.Siliconandgermanium.3.Describethep-njunctionelectricalproperties.Theelectricalpropertiesalterbythecontrolledadditionofverysmallquantitiesofimpuritiessuchasboronorpho

8、sphorus.Unit2Semiconductor半导体(2)LearnthetextPar