Isifundo seTyala: Ukuphucula i-CZ Crystal Pulling Yield kunye neLifetime nge-High-Purity Graphite Crucibles

Inkokeli yoBunjineli:UDkt. Marcus kunye neQela le-VET Crystal Thermal Field kunye neQela leeNjineli zeZinto eziPhuculweyo Ingxelo yoBugcisa:Isifundo seTyala se-VET Semiconductor kunye ne-Process Optimization (Inombolo yeNgxelo: VET-CS-2025-SAG04)

Isishwankathelo soLawulo kunye nesishwankathelo seProjekthi Ishishini:Ukuveliswa kweWafer yeSemiconductor kunye nePhotovoltaic Umthengi:I-S-AG (Umenzi weWafer weSemiconductor oyiNtloko ye-300mm, eJamani) Inkqubo:I-Czochralski (CZ) 12-Inch Monocrystalline Silicon Crystal Pulling Isisombululo:I-High-Density High-Purity Isostatic Graphite Crucible (Uthuthu < 5 ppm) + 5-Axis Precision CNC Machining + FEA Thermal Modeling Iziphumo eziQinisekisiweyo:Isivuno sokutsala iikristale sinyuke nge-14.2%, ubomi benkonzo yokunyibilikisa igrafiti buye banda nge-25%, kwaye ukungcola okunyibilikayo kuncitshiswe ngaphantsi komgangatho weshishini.

KwiCzochralski (CZ) monocrystalline silicon ukukhula, i-graphite crucible isebenza njengeyona nto iphambili ethwala umthwalo kunye ne-thermal conduction component exhasa i-quartz crucible kunye ne-silicon enyibilikisiweyo (>1,450°C). Ubumsulwa bayo kunye nokusebenza kwayo koxinzelelo lobushushu kumisela ngokuthe ngqo isivuno sokutsala ikristale kunye neempawu zombane. Izixhobo zegrafiti eziqhelekileyo zihlala zibangela ukuguquguquka kwe-quartz crucible, ukusasazeka kokungcola kwesinyithi, kunye nokungcola kwe-silicon melt. Olu phononongo luchaza indlela iqela eliphezulu lobunjineli be-thermal field kwi-VET elilungiselele ngayo ii-high-purity isostatic graphite crucibles ze-S-AG (eJamani), ukusombulula ukungcola kokungcola kunye nemingeni yoxinzelelo lobushushu phantsi kobushushu obuphezulu kakhulu ukuze kufezekiswe ukusebenza kakuhle kweendleko.

Umfanekiso 1: Umzobo wokufakelwa kwe-VET high-purity isostatic graphite crucible ngaphakathi kwe-Czochralski (CZ) crystal pulling furnace

Indlela ii-High-Purity Graphite Crucibles ezinciphisa ngayo ukungcola kunye neziphene kwi-CZ Silicon

Isiphelo Esiphambili: Ii-crucibles ze-graphite ezicocekileyo kakhulu nezinomthamo wothuthu <5 ppm zithintela ngokufanelekileyo ukusasazeka kwezinto zesinyithi ezilandelelanayo kwi-silicon melt, zinciphisa kakhulu amazinga okusasazeka kwekristale kwaye zonyusa ubomi bokuthwala izinto ezincinci.

1. Amanqaku Okufaka Isicelo Neentlungu Zabathengi

Ngelixa besebenzisa ii-oven ze-silicon ze-CZ ze-semiconductor ze-12-intshi (300mm) kwi-fab yayo eJamani, umthengi we-S-AG wajongana nokwehla okukhulu kwixesha lobomi be-ingot minority carrier kunye namazinga aphezulu okusasazeka komphetho. Uvavanyo lubonise ukuba ukungcola kothuthu oluncinci (B, Fe, Cu) ngaphakathi kwee-crucibles ze-graphite eziqhelekileyo kwangena kwiindonga ze-quartz crucible ngexesha lokutsala okuqhubekayo kumaqondo obushushu angaphezu kwe-1,450°C. Ezi zingcolisi zasasazeka ngqo kwi-silicon melt, ziphazamisa ukuthembeka kwesakhiwo sekristale kwaye zithintela ii-wafers ukuba zingahlangabezani nemigangatho yomgangatho ye-SEMI C12 kunye ne-ISO 9001.

2. Isisombululo soBunjineli kunye nokuPhunyezwa kweNkqubo

Iqela lobunjineli be-VET libonelele ngee-crucibles ze-graphite ezixineneyo kakhulu ezicocwe kakhulu ngegesi ye-halogen enobushushu obuphezulu:

• Ukukhethwa kwezinto kunye nokuCocwa okuNzulu:I-graphite ye-isostatic graphite (ubukhulu be-grain ≤ 8 μm) kunye ne-high-density (≥ 1.85 g/cm³) icociwe kwi-vacuum furnace kwi-72-hour high-temperature halogen gas cycle, nto leyo eyenza ukuba uthuthu olupheleleyo luhle luye kwi-<5 ppm.
• Uvavanyo lweBatch yeGDMS:I-High-resolution Glow Discharge Mass Spectrometry (GDMS) isetyenzisiwe ukuhlola ubumdaka bentsimbi ephambili ibhetshi nganye, ukuqinisekisa ukuba izinto ezingcolisayo ezingundoqo zincitshisiwe ukuya kumanqanaba e-ppb (jonga itheyibhile yedatha engezantsi).

Into yokungacoceki	I-Graphite Eqhelekileyo Ekhutshiweyo	I-GET High-Purity Isostatic Graphite	Umgangatho we-S-AG (i-SEMI C12)
Uthuthu olupheleleyo	≈ 150 ppm	< 3.8 ppm	< 5.0 ppm
Intsimbi (Fe)	12.5 ppm	18 ppb	< 50 ppb
I-Copper (Cu)	3.2 ppm	< 5 ppb	< 10 ppb
IBoron (B)	1.8 ppm	12 ppb	< 20 ppb
I-Nickel (Ni)	4.1 ppm	15 ppb	< 30 ppb

Emva kokusasazwa kwemveliso, ungcoliseko lokungcola kwe-silicon melt lwehle ngaphezulu kwe-85%, ngelixa ubomi obuqhelekileyo bokuthwala i-ingot minority bunyuke nge-32%. Ndwendwela eyethu[Indawo yoVavanyo lweGesi yeHalogen enobushushu obuphezulu kunye neGDMS]ukuphonononga iinkcukacha zobugcisa ezineenkcukacha.

Umfanekiso 2: Uthelekiso lokusasazwa kobomi bonke kwezixhobo zokuthwala ezincinci ngaphambi nasemva kokusebenzisa izixhobo zegrafiti ezicocekileyo kakhulu zeVET kwi-S-AG

Ukuphucula izakhiwo zentsimi yobushushu kunye nokumelana noxinzelelo lobushushu ngokusebenzisa ii-Isostatic Graphite Crucibles

Isiphelo Esiphambili: Ukuqhuba kobushushu obufanayo obufanayo kunye namandla aphezulu oomatshini kuthintela ngokufanelekileyo ukuguqulwa kwe-crucible kunye nokuveliswa kwe-micro-crack ngexesha lokujikeleza kobushushu okuphindaphindiweyo.

1. Amanqaku Okufaka Isicelo Neentlungu Zabathengi

Ii-graphite crucibles zokuqala ze-S-AG ezazikhutshiwe zazisoloko zifumana ukwanda kobushushu obungalinganiyo be-radial, ukuqhekeka kodonga, okanye ukuwohloka kwezantsi emva kwemijikelo emininzi yobushushu. Oku kukhokelele kuxinzelelo olungalinganiyo kunye nokuthamba/ukuwa kwe-quartz crucible yangaphakathi ngobushushu obuphezulu, nto leyo eyabangela ukuvalwa kwesithando somlilo. Ubomi obuqhelekileyo be-graphite crucible yayingaphantsi kwemijikelo yobushushu eyi-180, nto leyo eyabangela iindleko ezinkulu zokugcinwa kunye nexesha lokungasebenzi.

2. Isisombululo soBunjineli kunye nokuPhunyezwa kweNkqubo

Ukusombulula ukuguquguquka koxinzelelo lobushushu obuphezulu, uGqr. Marcus wakhokela iqela lobunjineli beVET ngenkqubo eqhelekileyo yokutshintshwa kwamanqanaba amathathu:

[Isigaba 1: Uxilongo] • Imodeli yobushushu ye-FEA • Ukulungiswa kwe-CTE Fine (4.8×10−&sup6;/K)

[Isigaba sesi-2: Ukwenziwa kweMveliso] • Ukucinezela Okubandayo Okungashukumiyo • Amandla okuGuquka angama-45 MPa

[Isigaba 3: Uqinisekiso] • Uvavanyo lweentsuku ezingama-60 kwindawo • Imijikelo yobushushu engaphezulu kwama-220

• Uvavanyo loLwakhiwo kunye nokuThatyathwa koBushushu (Ukuxilongwa):Iqela lenze i-Finite Element Analysis (FEA) modeling kwi-thermal gradients ye-S-AG kwaye layihlaziya kwakhona i-graphite crucible layout ye-3-piece split. I-Material formulation yalungiswa ukuze ilungelelanise i-Coefficient of Thermal Expansion (CTE) kwi-4.8×10−&sup6;/K, ifikelela kwi-compatibility ephezulu ne-quartz liner kwi-1,450°C kwaye isusa uxinzelelo lwe-mechanical pinching.
• Ukwenziwa Kwamandla Aphezulu kunye Nokuchwetheza Ngobuchule (Ukuvelisa):I-Cold Isostatic Pressing (CIP) ivelise iibhloko zegrafiti ezinamandla okuguquguquka angama-45 MPa. Umatshini wokugaya i-CNC ochanekileyo we-5-axis (±0.01mm tolerance) uqinisekisile ukuba izixhobo ziyamelana neempembelelo zoomatshini kunye noxinzelelo lobushushu xa zilayishwe ngamakhulu eekhilogram zetshaja yesilicon.
• Uvavanyo olukwindawo kunye nokuqinisekiswa kwexesha lobomi (Ukuqinisekiswa):I-S-AG yenze uvavanyo oluqhubekayo lweentsuku ezingama-60 eJamani. Emva kwemijikelo yobushushu engaphezulu kwama-220 (iiyure ezingama-1,500 kubushushu obugqithisileyo), ubukhulu baqhubeka bungenazo iinguqu ngaphandle kokuqhekeka okuncinci, yaphelisa ngempumelelo ukuvalwa kwesithando somlilo okubangelwa kukungasebenzi kakuhle kwesithando.

Umfanekiso 3: Umatshini wokulungisa i-CNC ochanekileyo we-VET 5-axis kunye nomsebenzi wokuhlola ubumsulwa be-GDMS mass spectrometry

Ukusetyenziswa koLawulo loXinzelelo loBushushu oluchanekileyo kwi-CZ Monocrystalline Silicon Growth

Isiphelo Esiphambili: Ukuphucula ulungelelwaniso lwejiyometri kunye nokusasazwa kokuhanjiswa kobushushu kuzinzisa i-solid-liquid interfaces, kunciphisa ukuguquguquka koxinzelelo lwe-oxygen ngexesha lokukhula kwekristale okude.

1. Amanqaku Okufaka Isicelo Neentlungu Zabathengi

Ngexesha lokutsalwa ixesha elide kwee-ingots ze-silicon ezine-doped eninzi okanye ezingenaziphene ezizii-intshi ezili-12, i-thermal stress asymmetry kwi-solid-liquid interface ibangela i-melt convection turbulence. Oku kukhokelela ekuguqukeni koxinzelelo lwe-oxygen kwi-axial nakwi-radial, kunciphisa i-annealing yieds ngexesha lokusika i-wafer elandelayo.

2. Ukuphunyezwa koBugcisa kunye neXabiso

• Ukulinganisa intsimi yobushushu:Ukulinganisa kwe-FEA kubonise iindlela zokuqhuba ubushushu phakathi kwe-1,450°C kunye ne-1,550°C, okuphucula i-gradients yobukhulu bodonga oluqhekekayo.
• Ulawulo Lokunyamezelana Kokulingana:Ukunyamezelana kobukhulu bodonga bekuthintelwe ngaphakathi kwe-±0.005mm, okwandisa ulungelelwaniso lobushushu nge-18%.

Ngolawulo oluchanekileyo loxinzelelo lobushushu, i-S-AG ifikelele kuphuculo lwe-22% kwi-ingot axial oxygen concentration uniformity, ukonyuka kwe-8% kwisantya sokutsala, kunye nokwehla okuphawulekayo kwiziphene zokusasazeka. Ukuze ufumane iinkcukacha zecandelo, jonga i-intanethi yethu.[IiCrucibles zeGraphite eziHlanjululwe kakhulu kunye neeNdawo zeGarafu eziTshisayo]ikhathalogu yemveliso.

Imibuzo Ebuzwa Rhoqo (Imibuzo Ebuzwa Rhoqo)

Isiphelo kunye nexabiso lomthengi

Ngokusebenzisa izixhobo ze-VET ezicoca i-graphite ezicoca i-high-purity isostatic kunye nezisombululo zentsimi yobushushu ezenziwe ngokwezifiso, i-European wafer giant S-AG yoyise ukusasazeka kokungcola kunye nemiqobo yoxinzelelo lobushushu. Iziphumo eziphambili zeprojekthi ziquka:

• Isivuno sokutsala i-silicon e-monocrystalline sinyuswe nge14.2%
• Ubomi benkonzo yenxalenye yentsimi yobushushu yegrafiti eyandiswe yi25%(idlula imijikelo yobushushu engaphezulu kwama-220)
• Ukusetyenziswa kwamandla ngokubanzi ngekhilogram nganye ye-silicon wafer kuncitshiswe malunga11%

Malunga neQela loMbhali kunye neQela loBugcisa UGqr. Marcus — Injineli ye-Thermal Field ePhakamileyo kunye ne-Advanced Materials, i-VET UGqr. Marcus unamava angaphezu kweminyaka eli-15 kwi-R&D kuyilo lwentsimi yobushushu ye-semiconductor kunye nokucocwa kwe-carbon-based composite, egxile kwimodeli yoxinzelelo lobushushu ye-CZ furnace kunye nophuhliso lwenkqubo ye-graphite ecocekileyo kakhulu (<5 ppm). Olu phononongo lwetyala lusekelwe kwidatha yokusetyenziswa kwentsimi evela kwi-S-AG yabathengi baseYurophu (Inombolo yeNgxelo: VET-CS-2025-SAG04).

Ukulungele Ukuphucula Intsimi Yakho Yobushushu Yesithando Somlilo Esitsalayo seCZ? Ukuba ujongene namanqanaba aphezulu okungcola, ukugoba kwe-graphite crucible, okanye ubomi bakho bonke bokuthwala izinto ezincinci, nxibelelana neqela lobunjineli le-VET ukuze ufumane i-FEA modeling eyenzelwe wena kunye nezisombululo zokutshintsha ubumsulwa obuphezulu. Ukulungele Ukuphucula Intsimi Yakho Yobushushu Yesithando Somlilo Esitsalayo seCZ? Ukuba ujongene namanqanaba aphezulu okungcola, ukugoba kwe-graphite crucible, okanye ubomi bakho bonke bokuthwala izinto ezincinci, nxibelelana neqela lobunjineli le-VET ukuze ufumane i-FEA modeling eyenzelwe wena kunye nezisombululo zokutshintsha ubumsulwa obuphezulu. Jonga iimveliso zeGraphite ezicocekileyo kakhulu Cela isisombululo esenziwe ngokwezifiso kunye neesampuli ze-GDMS