High-Purity Graphite Heater Mhinduro dzeSemiconductor Epitaxy

Mumaitiro e semiconductor anodziya zvakanyanya akadai seMOCVD (Metal-Organic Chemical Vapor Deposition) uye SiC epitaxial growth, thermal field control inosarudza zvakananga kufanana kwehukobvu hwefirimu, huwandu hwedoping, uye goho rekupedzisira rewafer. Sechikamu chepakati chethermal field, iyoHigh-Charity Graphite Heaterinofanira kushanda zvakadzikama uye nguva dzose pasi pekupisa kwakanyanya kunopfuura 1600°C munzvimbo dzine gasi rinoparadza zvakanyanya. Ichibatanidza zvidzidzo zvemashandisirwo evatengi chaiwo neruzivo rwakakosha rwechigadzirwa, chinyorwa chino chinopa ongororo yakadzama yezvakanakira zvehunyanzvi, dhizaini yemaumbirwo, uye basa guru remaheater egrafiti akachena kwazvo mukugadzira mawafer e semiconductor.

Sei Uchifanira Kusarudza High-Purity Graphite Heater yeMOCVD Systems?

Mumaitiro akakosha akadai seMOCVD neGaN/SiC epitaxy, kunyangwe kushanduka-shanduka kwekushisa kudiki (>2°C) kunogona kutungamira kukuchinja kwewavelength kana zvikanganiso zvekristaro mu epitaxial layer. Nekushandisa high thermal conductivity (100–150 W/m·K) uye low content of thermal expansion (CTE), high-purity graphite materials inodzora kupisa zvakanaka uye nekukurumidza pamusoro pese pe susceptor newafer.

Kuenzana Kwenzvimbo Dzekupisa uye Kudzora Nzvimbo Dzakawanda

Kuti vadzivise kurasikirwa nemwaranzi yekupisa pamucheto wekamuri re epitaxy, ma graphite heater ane hutsanana hwakawanda anowanzo sanganisira dhizaini yekudzora tembiricha yakazvimirira ine nzvimbo dzakawanda. Nekugadzirisa kwakanyatsojeka kwenzvimbo dzekudzivirira, mainjiniya anogadzirisa nzvimbo dzedunhu dzinoyambuka uye dziviriro yemagetsi zvichienderana nehunhu hwekurasikirwa nekupisa kwenzvimbo yekuyerera kwekamuri. Izvi zvinochengetedza kusiyana kwenzvimbo yekupisa munzvimbo yekukura kwewafer mukati me ±1°C, zvichivimbisa kugadzikana kwemagetsi pama wafer ese ari padiski.

Kudzora Zviri Mukati meAsh uye Kuvimbisa Nzvimbo Yakachena Zvakanyanya

Maitiro eSemiconductor epitaxy anonyanya kukanganiswa nekusvibiswa kwesimbi. Graphite yeindasitiri yakajairika ine zvinhu zvesimbi zvakaita sesimbi (Fe), nickel (Ni), uye mhangura (Cu), izvo zvinokurumidza kuputika nekupararira mu epitaxial layer pakupisa kwakanyanya, zvichikanganisa voltage yekuputsika kwemidziyo uye kufamba kwecarrier. Maheater egraphite akachena kwazvo anogadziriswa maitiro ekuchenesa chlorination zvakanyanya, zvichideredza huwandu hwedota kusvika pasi pe5 ppm (uye pasi pe2 ppm yemhando yepamusoro ye semiconductor grade), zvichidzivirira kusvibiswa kwe epitaxial wafers kubva mukusvibiswa kwemhepo inopisa panzvimbo inobva.

Zvinhu Zvepamusoro zveGraphite Heating muSemiconductor Wafer Processing

Zvinhu zvinodziya zve semiconductor zvinowanzo pisa nekutonhodza nekukurumidza kubva pakupisa kwemumba kusvika kuzviuru zvemadhigirii Celsius. Kusiyana newaya dzesimbi dzinopisa (dzakadai setungsten kana molybdenum), dzinowanzo shanduka kuita macrystalline, dzinopera simba, kana kudonha kana tembiricha yakakwira, graphite ine hunhu hwakasiyana: simba rinowedzera nekupisa.

Simba reMichina paTembiricha Yakakwira uye Kuramba Kuneta muMagadzirirwo

Simba rekudhonza uye rekuchinjika rezvinhu zvegraphite rinowedzera kana tembiricha ichikwira, zvichikwira pakati pe2000°C ne2500°C. Hunhu uhwu hunovimbisa kuti maheater egraphite haatsvedzeri kana kupwanyika kwechimiro pasi pemwaranzi inopisa zvakanyanya uye kushanda kwekupisa kwakanyanya. Nekuda kweizvozvo, kugadzikana kwekudzivirira kwemagetsi kunochengetwa kwenguva refu, zvichideredza zvakanyanya nguva yekushanda isina kurongwa.

Kugadzira Machining e3D Akanyatsogadzirwa uye Marongero Emadunhu Akaoma

Ma semiconductor reactors emazuva ano anoda marongero enzvimbo akamanikana zvikuru. Graphite yakachena kwazvo ine mashandiro akanaka uye inogona kugadziriswa kuburikidza nekushandisa high-precision 5-axis CNC machining kuita ma circuit patterns akaomarara—akadai se threaded structures dze threaded dze three-phase, serpentine folded paths, uye dual-helix staggered circuits. Aya ma high-precision geometric configurations anowedzera nzvimbo yekupisa munzvimbo diki, zvichiita kuti pave ne high power density output ine low inductance effects.

Mabhenefiti Akakosha Ekushanda KwemaSiC Coated Graphite Heaters

Kuti zvikwanise kutsungirira mamiriro ezvinhu akaomarara—akadai semhepo inoderedza hydrogen inopisa zvakanyanya kana magasi anocheka ane chlorine/fluorine—kuisa dense Silicon Carbide layer (CVD SiC Coating) pamusoro pe high-purity graphite substrate kwave mhinduro yakajairika muindasitiri.

Kuramba Kuchekwa kweHydrogen uye Kubviswa kweZvidimbu

Munguva yeSiC neSilicon epitaxy, huwandu hwakawanda hweH2B₂Gasi rinobaya zvakanyanya graphite isina kuputirwa pakupisa kwakanyanya (hydrogen etching inoumba methane gasi), zvichiita kuti pamusoro pegraphite pave pasina kuputirwa, pave nekutsemuka, uye pave nekusvibiswa kwezvikamu. CVD SiC coating yakakora 100% inovhara ma micro-pores pamusoro pegraphite, ichibvisa zvachose kukurwa kwegasi uye ichigadzira nzvimbo yakachena kwazvo isina kudonha kwezvikamu.

Kugara kwenguva refu muAggressive Media uye Kuderedzwa Kwemari Yese Yekuva Muridzi (TCO)

Munzvimbo dzinoita reaction dzinosanganisira magasi anoshanda zvakanyanya seHCl neNH₃, CVD SiC coatings inoratidza kusashanda zvakanaka kwemakemikari. Haingodziviriri chete graphite substrate kubva mukuora asiwo inowedzera kutenderera kwekutsiva zvinhu zvinopisa (zvinowanzo wedzera hupenyu hwebasa neanopfuura 200%). Izvi zvinoderedza zvakanyanya Total Cost of Ownership (TCO) ye semiconductor fab uye amortized cost pa wafer.

Chidzidzo Chenyaya: Kugadzirisa Kufanana Kwekupisa uye Kusvibiswa Kwezvikamu muSiC Epitaxy

Pfungwa dzekurwadziwa kweVatengi:Kambani inozivikanwa yechizvarwa chechitatu che semiconductor epitaxy muGermany yakasangana nematambudziko maviri akakosha panguva yekukura kweSiC epitaxial ye6-inch (tembiricha yekushanda 1650°C, H2O2).₂+ TCS atmosphere): Chekutanga, kutsauka kweukobvu hwe epitaxial layer pamucheto wewafer kwakasvika kusvika ±3.8%, zvichikonzera kutadza kushanda kwemidziyo yemupendero. Chechipiri, heater yepakutanga yeOEM graphite yakaratidza kuchenesa kwakanyanya kwehydrogen pamusoro pemvura mushure memaawa 120 chete ekushandiswa, zvichikonzera kuwanda kwezvikamu mukamuri re reaction - zvichipfuura mwero wehunhu hwekukanganisika ne3× paavhareji.

Kuongororwa kwesimba reVET & Mhinduro Yakagadzirwa

Pavakabatidzana, timu yeinjiniya yeVET Energy yakaita simulations dzakabatana nemagetsi nemafuta paOEM heater yekutanga. Kuongororwa kwacho kwakaratidza kuti hapana simba rakakwana rekudziisa pamucheto uye maburi madiki/maburi ekumanikidzwa kwekupisa muSiC coating yepamusoro (ukobvu hwekuvhara hwaive 60μm chete nekunamatira kusina kusimba). Mukupindura, VET Energy yakapa mhinduro yeinjiniya yakanangwa:

• Kugadzirisa Magadzirirwo Emumunda Wekupisa:Ndakaisa dhizaini yekudzora resistance yakazvimirira ine mativi matatu, ndikadzikisa chikamu chekupisa ne8% pedyo nenzvimbo dzekuparadza magetsi dziri pedyo nemucheto kuti ndiwedzere huwandu hwemagetsi emunzvimbo iyoyo.
• Kuvandudzwa kweSubstrate Yakachena Zvikuru:Graphite yakasarudzwa ine density yakakura yeisotropic isostatic ine ash content <2 ppm, ichinyatsoenderana ne coefficient of thermal expansion (CTE) neSiC coating (CTE matching >98%).
• Kuvandudzwa kweMaitiro eCVD SiC:Ndakashandisa nzira yakawedzerwa yekuisa CVD, ndichiwedzera ukobvu hwepamusoro hweSiC coating kusvika 150 ± 10 μm ine chimiro chezviyo chakasimba, chisina maburi chinokwanisa kudzivirira 1700°CH₂kusukira.

Mhedzisiro Yekuita Uye Kukosha Kwevatengi Kwakaunzwa

Mushure memazuva makumi matatu akatevedzana ekuongorora mutsetse wekugadzira, mutengi akataura kuti mashandiro akanaka kwazvo: kufanana kweukobvu hwe epitaxial hwakafanana (kusanganisira kusabatanidzwa kwemucheto we3mm) kwakavandudzika zvakanyanya kubva pakugadzirwa.±3.8% kusvika ±0.8%; hita yaishanda nguva dzosemaawa anopfuura mazana manapasina kutsemuka kwejira kana kupararira kwenzvimbo; zvikanganiso zvezvikamu zvekamuri zvinomhanya kamwe chete (>0.5μm) zvaiveyakaderedzwa ne85%Izvi zvakawedzera zvakananga ne12% muhuwandu hwechips pawafer imwe neimwe uye zvakaderedza mari yekugadzirisa michina pagore neanenge€85,000.

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