Nhanganyaya
Zvigadziko zvesafireine basa guru mukugadzirwa kwema semiconductor emazuva ano, kunyanya mu optoelectronics uye mashandisirwo emidziyo yakafara. Senzira ye aluminium oxide (Al₂O₃), sapphire inopa musanganiswa wakasiyana wekuoma kwemuchina, kugadzikana kwekupisa, kusagadzikana kwemakemikari, uye kujeka kwemaziso. Hunhu uhwu hwakaita kuti sapphire substrates dzive dzinokosha pakugadzira gallium nitride epitaxy, kugadzira LED, laser diodes, uye matekinoroji akasiyana-siyana e emergency compound semiconductor.
Zvisinei, hazvisi zvese zvinhu zvesafire zvakagadzirwa zvakaenzana. Kushanda, goho, uye kuvimbika kwemaitiro e semiconductor ari pasi zvinonyatsoenderana nemhando ye substrate. Zvinhu zvakaita sekutarisa kwekristaro, kufanana kweukobvu, kuomarara kwepazasi, uye defect density zvinokanganisa zvakananga maitiro ekukura kwe epitaxial uye mashandiro emudziyo. Chinyorwa chino chinoongorora zvinotsanangura substrate yesafire yepamusoro-soro yekushandiswa kwe semiconductor, kunyanya kutarisisa kristalo, kusiyana kweukobvu hwese (TTV), kuomarara kwepazasi, kukwirirana kwe epitaxial, uye matambudziko akajairika emhando anosangana nawo mukugadzira nekushandisa.
Zvinokosha zveSapphire Substrate
Chigadziko chesapphire iwafer yealuminium oxide yakagadzirwa nekristaro imwe chete inogadzirwa kuburikidza nenzira dzekukura kwekristaro dzakadai seKyropoulos, Czochralski, kana Edge-Defined Film-Fed Growth (EFG). Kana yakura, kristaro inonamirwa, inochekwa, inokweshwa, inoporishwa, uye inoongororwa kuti igadzire wafer dzesapphire dzemhando yepamusoro.
Mumamiriro ezvinhu e semiconductor, safaya inonyanya kukosheswa nekuda kwehunhu hwayo hwekudzivirira kupisa, nzvimbo yakanyanya kunyunguduka, uye kugadzikana kwechimiro pasi pekukura kwe epitaxial inodziya zvakanyanya. Kusiyana nesilicon, safaya haifambise magetsi, zvichiita kuti ive yakakodzera kushandiswa uko kupatsanurwa kwemagetsi kwakakosha, senge zvishandiso zve LED nezvikamu zveRF.
Kukodzera kwechinhu chinonzi sapphire substrate kushandiswa kwema semiconductor hakungotsamiri pamhando yekristaro yakawanda chete asiwo pakudzora kwakaringana kwejometri uye parameters dzepamusoro. Hunhu uhwu hunofanirwa kugadzirwa kuti huenderane nezvinodiwa zvakanyanya zvemaitiro.
Kutungamirirwa neKristaro uye Kubudirira Kwayo
Kutarisa kwekristaro chimwe chezvinhu zvinonyanya kukosha zvinoratidza mhando yesapphire substrate. Sapphire ikristaro yeanisotropic, zvichireva kuti hunhu hwayo hwepanyama nemakemikari hunosiyana zvichienderana nekwakananga kwekristaro. Kutarisa kwepamusoro pesubstrate zvichienzaniswa nekristaro lattice kunokanganisa zvakanyanya kukura kwefirimu re epitaxial, kupararira kwekushushikana, uye kuumbwa kwezvikanganiso.
Mashandisirwo esapphire anonyanya kushandiswa mukushandiswa kwe semiconductor anosanganisira c-plane (0001), a-plane (11-20), r-plane (1-102), uye m-plane (10-10). Pakati peizvi, c-planesapphire ndiyo sarudzo huru yemidziyo ye LED neGaN nekuda kwekushanda kwayo nemaitiro ekugadzira vapor esimbi-organic chemical vapor.
Kudzora kwakarurama kwenzvimbo kwakakosha. Kunyangwe miscuts diki kana angular deviations zvinogona kuchinja zvakanyanya maumbirwo enzvimbo, maitiro e nucleation, uye nzira dzekuzorora panguva ye epitaxy. Zvishandiso zvesafire zvemhando yepamusoro zvinowanzo tsanangura kushivirira kwenzvimbo mukati mezvikamu zve degree, zvichiita kuti zvive nyore kuenderana pakati pema wafers uye pakati pema batches ekugadzira.
Kufanana kweKutungamira uye Migumisiro yeEpitaxial
Kutarisa kwakafanana kwekristaro pamusoro pewafer kwakakosha sekutarisa kwakajairika. Kusiyana kwekutarisa kwenzvimbo kunogona kutungamira kukukura kwe epitaxial kusingaenderane, kusiyana kweukobvu mumafirimu akaiswa, uye kusiyana kwenzvimbo mukuwanda kwedenda.
Pakugadzirwa kwe LED, shanduko dzinokonzereswa nekutarisa dzinogona kushandura kusvika pakusafanana kwemafungu emhepo, kupenya, uye kushanda zvakanaka kwewafer. Mukugadzirwa kwakawanda, kusafanana kwakadaro kunokanganisa zvakananga kushanda zvakanaka kwebinning uye goho rese.
Saka mawafer emhando yepamusoro esapphire emhando yepamusoro anozivikanwa kwete chete nekungoshandiswa kwawo chete asiwo nekudzora kwakasimba kwenzvimbo yakatarisana nedhayamita yese yewafer.
Kusiyana Kwehukobvu Hwese (TTV) uye Kunyatsojeka kweGeometric
Kusiyana kweukobvu hwese, kunowanzonzi TTV, ipfungwa huru yejometri inotsanangura musiyano uripo pakati peukobvu hwepamusoro nehwepasi hwewafer. Mukugadzirisa semiconductor, TTV inokanganisa zvakananga kubata wafer, kudzika kwe lithography, uye kufanana kwe epitaxial.
TTV yakaderera inonyanya kukosha munzvimbo dzinogadzirwa otomatiki uko mawafer anotakurwa, akarongeka, uye anogadziriswa pasina kushivirira kwakanyanya kwemuchina. Kusiyana kwakanyanya kweukobvu kunogona kukonzera kukotama kwewafer, kupwanyika zvisina kunaka, uye zvikanganiso zvekutarisa panguva yekutora mifananidzo.
Zvigadziko zvesapphire zvemhando yepamusoro zvinowanzoda TTV values dzakanyatso gadziriswa kusvika kuma micrometer mashoma kana pasi, zvichienderana nedhayamita yewafer uye mashandisirwo azvo. Kuti zvibudirire zvinoda kungwarira pakuchekwa, kuputirwa, uye kupukutwa, pamwe ne metrology yakasimba uye kuvimbiswa kwemhando.
Hukama Pakati peTTV neWafer Flatness
Kunyange zvazvo TTV ichitsanangura kusiyana kweukobvu, ine chekuita nematanho ekutsetseka kwewafer akadai sebow newarp. Kuomarara kwakanyanya kweSapphire uye kuomarara kwayo kunoita kuti isanyanya kukanganwika kupfuura silicon kana zvasvika pakusakwana kwejometri.
Kusasimba zvakanaka pamwe chete neTTV yakakwira zvinogona kukonzera kushushikana munzvimbo imwe chete panguva yekukura kwe epitaxial inodziya zvakanyanya, zvichiwedzera njodzi yekutsemuka kana kutsvedza. Mukugadzirwa kwe LED, matambudziko aya emakanika anogona kukonzera kutyoka kwewafer kana kudzikira kwekuvimbika kwemuchina.
Sezvo dhayamita dzewafer dzichiwedzera, kudzora TTV uye kusatsetseka kunowedzera kuoma, zvichiwedzera kusimbisa kukosha kwehunyanzvi hwepamusoro hwekupukuta nekuongorora.
Kuoma Kwepamusoro uye Basa Rayo muEpitaxy
Kuomarara kwepamusoro ndicho chinhu chinoratidza ma substrates esapphire emhando ye semiconductor. Kutsvedzerera kweatomu kwe substrate kune simba rakananga pa epitaxial film nucleation, defect density, uye kunaka kwe interface.
MuGaN epitaxy, kuomarara kwepadenga kunokanganisa kuumbwa kwezvikamu zvekutanga zve nucleation uye kupararira kwe dislocations mu epitaxial film. Kuomarara kwakanyanya kunogona kutungamira mukuwedzera kwe threading dislocation density, surface pits, uye non-uniform film growth.
Zvishandiso zvemasafire zvemhando yepamusoro zvekushandisa semiconductor zvinowanzoda hunhu hwekuoma kwepadenga hunoyerwa muzvikamu zve nanometer, zvinoitwa kuburikidza nehunyanzvi hwepamusoro hwekupukuta nemakemikari. Nzvimbo idzi dzakapfava zvikuru dzinopa hwaro hwakagadzikana hwema epitaxial layers emhando yepamusoro.
Kukuvara Kwepamusoro Uye Zvikanganiso Zviri Pasi Pevhu
Kupfuura kuomarara kunoyerwa, kukuvara kuri pasi pevhu kunounzwa panguva yekucheka kana kukuya kunogona kukanganisa zvakanyanya mashandiro evhu revhu. Kutsemuka kudiki, kushushikana kwakasara, uye zvikamu zvisina chimiro zvinogona kusaonekwa kuburikidza nekutarisa kwepamusoro pevhu asi zvinogona kushanda senzvimbo dzekutanga dzisina kunaka panguva yekugadzirisa tembiricha yepamusoro.
Kupisa panguva ye epitaxy kunogona kuwedzera zvikanganiso izvi zvakavanzika, zvichikonzera kutsemuka kwewafer kana kupatsanurwa kwe epitaxial layers. Saka mawafer emhando yepamusoro esapphire anogadziriswa zvakanaka kuti abvise zvidimbu zvakakuvara uye adzorere kristalline perfection pedyo nepamusoro.
Kuenderana kweEpitaxial uye Zvinodiwa zveKushandisa LED
Mashandisirwo makuru ekushandisa semiconductor pakugadzira masimbi esapphire anoramba ari maLED akavakirwa paGaN. Munyaya iyi, kunaka kwesimbi kunokanganisa kushanda zvakanaka kwemidziyo, hupenyu hwese, uye kugona kwayo kugadzira.
Kuenderana kweEpitaxial hakungosanganisiri chete kufananidza lattice asiwo maitiro ekuwedzera kwekupisa, kemikari yepamusoro, uye manejimendi ezvikanganiso. Kunyange zvazvo sapphire isingaenderane nelattice neGaN, kudzora kwakanyatsonaka kwekutarisa substrate, mamiriro epamusoro, uye dhizaini yebuffer layer zvinobvumira kukura kwe epitaxial yemhando yepamusoro.
Pakushandisa ma LED, ukobvu hwakafanana hwe epitaxial, defect density shoma, uye hunhu hwe emission hunogara huripo pa wafer zvakakosha. Izvi zvakabatana zvakanyanya ne substrate parameters dzakadai se orientation accuracy, TTV, uye surface roughness.
Kugadzikana kweThermal uye Kuenderana kweMaitiro
LED epitaxy nedzimwe nzira dze semiconductor dzinowanzo sanganisira tembiricha dzinopfuura 1,000 degrees Celsius. Kugadzikana kwakanyanya kwekupisa kweSapphire kunoita kuti ive yakakodzera nzvimbo dzakadaro, asi mhando ye substrate ichiri kuita basa guru mukuita kwechinhu ichi kune kushushikana kwekupisa.
Kusiyana kweukobvu kana kushushikana kwemukati kunogona kutungamira mukuwedzera kwekupisa kusingaenderane, zvichiwedzera njodzi yekukotama kana kutsemuka kwewafer. Zvishongo zvesafire zvemhando yepamusoro zvakagadzirwa kuti zvideredze kushushikana kwemukati uye kuve nechokwadi chekuti kupisa kwacho kunogara kuripo mukati mewafer.
Matambudziko Akajairika Emhando Yepamusoro Mumidziyo yeSapphire
Pasinei nekufambira mberi mukukura kwekristaro uye kugadziriswa kwewafer, matambudziko akawanda emhando yekristaro achiripo muzvishandiso zvesapphire. Izvi zvinosanganisira kusarongeka kwenzvimbo, TTV yakawandisa, kukwenya pamusoro, kukuvara kunokonzerwa nekukwenya, uye zvikanganiso zvemukati zvekristaro zvakaita sekunge zvakabatanidzwa kana kupatsanurwa.
Chimwe chinhu chinowanzoitika ndechekuti pane musiyano pakati pewafer newafer mukati mechikamu chimwe chete. Kusagadzikana kwekutonga maitiro panguva yekucheka kana kupukuta kunogona kutungamira kune shanduko dzinoomesa kugadzirisa maitiro ekupedzisira.
Kune vagadziri vema semiconductor, matambudziko aya emhando yepamusoro anoshandura zvinodiwa pakugadzirisa maitiro, goho rakaderera, uye mitengo yakakwira yekugadzira.
Kuongorora, Metrology, uye Kudzora Hunhu
Kuti uve nechokwadi chekuti substrate yesafire ine mhando yepamusoro zvinoda kuongororwa kwakazara uye metrology. Kutarisa kwacho kunosimbiswa uchishandisa X-ray diffraction kana nzira dze optical, nepo TTV uye flatness zvichiyerwa uchishandisa contact kana optical profilometry.
Kuomarara kwenzvimbo kunowanzoonekwa uchishandisa atomic force microscopy kana white-light interferometry. Masisitimu ekuongorora epamusoro anogonawo kuona kukuvara kwepasi penzvimbo uye zvikanganiso zvemukati.
Vatengesi vema "sapphire substrate" emhando yepamusoro vanobatanidza zviyero izvi mumabasa ekudzora mhando, zvichipa kurongeka uye kugara kwakakodzera kwakakosha pakugadzira semiconductor.
Maitiro Emangwana uye Kuwanda Kwezvinodiwa Zvemhando Yepamusoro
Sezvo tekinoroji ye LED ichifambira mberi ichienda pakushanda zvakanaka, saizi diki dzemidziyo, uye magadzirirwo epamusoro, zvinodiwa pamidziyo yesafire zviri kuramba zvichiwedzera. Saizi huru dzewafer, kushivirira kwakasimba, uye huwandu hwakaderera hwezvikanganiso zviri kuva zvinodiwa zvakajairika.
Panguva imwe cheteyo, mashandisirwo ari kubuda akadai sema micro-LED displays uye michina yepamusoro ye optoelectronic inowedzera zvinodiwa zvakanyanya pakufanana kwe substrate uye kunaka kwenzvimbo. Mafambiro aya ari kukurudzira hunyanzvi hunoramba huchienderera mberi mukukura kwekristaro, kugadzirisa wafer, uye metrology.
Mhedziso
Chinhu chesapphire chemhando yepamusoro chinotsanangurwa nezvakawanda kupfuura zvachinogadzira. Kurongeka kwekristaro, TTV shoma, kuomarara kwepamusoro, uye kuenderana kwe epitaxial zvese zviri zviviri zvinoratidza kukodzera kwayo kushandiswa kwema semiconductor.
Pakugadzira ma LED ne compound semiconductor, sapphire substrate inoshanda sehwaro hwemuviri uye hwemaumbirwo ayo mashandiro emidziyo akavakirwa. Sezvo matekinoroji ekugadzira achifambira mberi uye kushivirirana kuchiwedzera, mhando ye substrate inova chinhu chakakosha mukuwana goho rakakura, kuvimbika, uye kushanda zvakanaka kwemari.
Kunzwisisa nekudzora zvinhu zvakakosha zvataurwa munyaya ino kwakakosha kune chero sangano rinobatanidzwa mukugadzira kana kushandisa mawafer e semiconductor sapphire.
Nguva yekutumira: Zvita-29-2025