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《单晶硅与晶硅的区别（the difference between monocrystalline silicon and crystalline silicon）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、单晶硅与晶硅的区别（Thedifferencebetweenmonocrystallinesiliconandcrystallinesilicon）Thispaperiscontributedbyxionggang426DOCdocumentsmayexperiencepoorbrowsingontheWAPside.ItisrecommendedthatyouselectTXTfirstordownloadthesourcefiletothelocalmachine.Thedifferencebetweenmonocrystallinesiliconandpolycrystallines
2、iliconmonocrystallineandpolycrystallinesiliconis,whensolidificationwhenmolten,siliconatomsinmanynucleiinthediamondlattice,ifthesenucleigrowintocrystalgrainorientationisthesame,theformationofmonocrystallinesilicon.Ifthesenucleigrowintocrystallinegrainswithdifferentorientations,thenpolycrystallinesi
3、liconisformed.Thedifferencebetweenpolysiliconandmonocrystallinesiliconismainlyreflectedinphysicalproperties.Forexample,inthemechanicalproperties,electricalproperties,polysiliconisnotasgoodasmonocrystallinesilicon.Polycrystallinesiliconcanbeusedasrawmaterialfordrawingmonocrystallinesilicon.Monocrys
4、tallinesiliconcanberegardedasthepurestsubstanceintheworld,andthegeneralsemiconductordevicerequiressixpurityofmorethan9silicon.Largescaleintegratedcircuitsrequirehigherpurityofsilicontonine9.Atpresent,peoplehavebeenabletoproducepurityoftwelve9monocrystallinesilicon.Monocrystallinesiliconisanindispe
5、nsablebasicmaterialinmodernscienceandtechnology,suchaselectroniccomputerandautomaticcontrolsystem.Highpuritysiliconisextractedfromquartz,andmonocrystallinesiliconistakenasanexample.Therefiningshouldbecarriedoutthroughthefollowingprocesses:quartzsand,metallurgicalgradesilicon,purificationandrefinin
6、g,apolycrystallinesiliconingot,monocrystallinesiliconandsiliconwafercutting.Itisnotdifficulttorefinemetallurgicalgradesilicon.Itspreparationismainlymadeofcarbonreductionquartzsandinelectricarcfurnace.Thepurityofthesiliconthathasbeenreducedisabout98-99%,butthesiliconusedinthesemiconductorindustrymu
7、stbehighlypurified(thepurityoftheelectronicgradepolysiliconrequires119,andthesolarcelllevelonlyrequires69).Inthepurificationprocess,thereisa"trichlorosilanereductionmethod(SIEMENS)"thekeytechnologyinChinahasnotma
