1. He aha te poti PECVD?
1.1 Te whakamāramatanga me ngā mahi matua
Ko te poti PECVD (Plasma Enhanced Chemical Vapor Deposition) he taputapu matua e whakamahia ana hei kawe i ngā papa, i ngā papa rānei i roto i te tukanga PECVD. Me mahi pumau i roto i te taiao pāmahana teitei (300-600°C), i whakahohehia e te plasma me te hau waikura (pērā i te SiH₄, NH₃). Ko ōna mahi matua ko:
● Te tūnga tika: kia ōrite te tawhiti o te paparanga, kia kore ai e pokanoa te paninga.
● Te whakahaere i te papa wera: te arotau i te tohatoha pāmahana me te whakapai ake i te ōritetanga o te kiriata.
● Ārai ārai-parahanga: Ka wehea te plasma mai i te kōhao taputapu hei whakaiti i te tūponotanga o te parahanga whakarewa.
1.2 Ngā hanganga me ngā rauemi noa
Kōwhiringa rauemi:
● Waka karāpiti (kōwhiringa matua): he kawe wera nui, he ātete pāmahana teitei, he iti te utu, engari me pania hei ārai i te waikura hau.
●Poti kuata: He tino parakore, he ātete ki ngā matū, engari he tino pakarukaru, he utu nui hoki.
●Ngā uku (pērā i te Al₂O₃): ātete ki te pakaru, he pai mō te whakaputa auau teitei, engari he ngoikore te kawe wera.
Ngā āhuatanga hoahoa matua:
● Te mokowā o te mokowā: Whakatauritehia te matotoru o te papa (pēnei i te ātete 0.3-1mm).
●Te hoahoa o te pūaha rere hau: te arotau i te tohatoha hau tauhohenga me te whakaiti i te pānga taha.
●Paninga mata: Paninga SiC, TaC, DLC rānei (waro taimana) noa hei whakaroa i te roa o te mahi.
2. He aha tātou me aro atu ai ki te mahi a ngā poti PECVD?
2.1 Ngā āhuatanga matua e whā e pā tika ana ki te hua o te tukanga
✔ Whakahaere Parahanga:
Ka memeha haere ngā poke o te tinana o te poti (pērā i te Fe me te Na) i ngā pāmahana tiketike, ka puta he pū kōhao iti, he turuturu rānei i roto i te kiriata.
Mā te tihore i te paninga ka puta mai ngā matūriki, ā, ka puta he hapa paninga (hei tauira, mā ngā matūriki > 0.3μm ka heke te whai huatanga o te pākahiko mā te 0.5%).
✔ Te ōritetanga o te papa wera:
Mā te kore taurite o te kawe wera o te poti karāhe PECVD ka rerekē te matotoru o te kiriata (hei tauira, i raro i te whakaritenga ōrite o te ±5%, me iti iho te rerekētanga pāmahana i te 10°C).
✔ Hototahi ki te plasma:
Ka pā mai pea he rerenga rerekē mai i ngā rauemi hē, ā, ka kino pea te hiko o te papa whakarewa, o te taputapu rānei.
✔ Te roa o te ratonga me te utu:
Me whakakapi pinepine ngā takere poti kounga iti (hei tauira, kotahi i te marama), ā, he nui ngā utu tiaki ā-tau.
3. Me pēhea te whiriwhiri, te whakamahi me te tiaki i tētahi poti PECVD?
3.1 Tikanga whiriwhiri e toru ngā taahiraa
Hipanga 1: Whakamāramahia ngā tawhā tukanga
● Awhe pāmahana: Ka taea te whiriwhiri i te paninga karāpiti + SiC i raro i te 450°C, ā, me whiriwhiri te kiripaka, te uku rānei i runga ake i te 600°C.
●Momo hau: Mēnā kei roto ngā hau waikura pēnei i te Cl2 me te F-, me whakamahi he paninga kiato-teitei.
●Rahi o te angaanga: He rerekē rawa te kaha o te hanganga poti 8-inihi/12-inihi, ā, me whai hoahoa kua whakaritea.
Hipanga 2: Arotakehia ngā inenga mahi
Ngā Inenga Matua:
●Te taratara o te mata (Ra): ≤0.8μm (me ≤0.4μm te mata e pā ana)
●Kaha here paninga: ≥15MPa (paerewa ASTM C633)
●Te rerekētanga pāmahana teitei (600℃) : ≤0.1mm/m (whakamātautau 24 hāora)
Hipanga 3: Manatokohia te hototahitanga
● Te whakataurite i ngā taputapu: Whakaūtia te rahi o te atanga me ngā tauira matua pēnei i a AMAT Centura, centrotherm PECVD, me ētahi atu.
● Whakamātautau whakaputanga whakamātautau: E taunakihia ana kia whakahaerehia he whakamātautau puranga iti o te 50-100 ngā wahi hei manatoko i te ōritetanga o te paninga (te paerewa rerekētanga o te matotoru o te kiriata <3%).
3.2 Ngā Tikanga Pai mō te Whakamahinga me te Tiaki
Ngā Whakatakotoranga Mahi:
✔Te tukanga horoi-mua:
● I mua i te whakamahinga tuatahi, me pania te Xinzhou ki te plasma Ar mō te 30 meneti hei tango i ngā paru e piri ana ki te mata.
●I muri i ia puranga tukanga, ka whakamahia te SC1 (NH₄OH:H₂O₂:H₂O=1:1:5) hei horoi hei tango i ngā toenga rauropi.
✔ Te uta i ngā tapu:
●Kāore e whakaaetia te uta nui rawa (hei tauira, ko te kaha mōrahi kia 50 ngā wahi, engari ko te kawenga tuturu kia ≤ 45 ngā wahi hei pupuri i te wāhi mō te whakawhanui).
●Me ≥2mm te tawhiti o te taha o te angaanga mai i te pito o te tāke poti hei ārai i ngā pānga ki te taha plasma.
✔ Tohutohu mō te Whakaroa i te Ora
● Whakatika paninga: Ina he taratara te mata Ra>1.2μm, ka taea te whakatakoto anō i te paninga SiC mā te CVD (he 40% te iti iho o te utu i te whakakapinga).
✔ Whakamātautau auau:
● Ia marama: Tirohia te kounga o te paninga mā te whakamahi i te ine i te māramatanga mā.
●Ia hauwhā: Tātarihia te taumata whakatioata o te poti mā te XRD (me whakakapi te poti angiangi quartz me te āhua tioata > 5%).
4. He aha ngā raruraru e kitea whānuitia ana?
P1: Ka taea e teWaka PECVDkia whakamahia i roto i te tukanga LPCVD?
A: Kāore i te tūtohutia! He teitei ake te pāmahana o te LPCVD (ko te tikanga he 800-1100°C) ā, me tu atu ki te pēhanga hau teitei ake. Me whakamahi i ngā rauemi e ātete ake ana ki ngā huringa pāmahana (pēnei i te karāhe isostatic), ā, me whai whakaaro te hoahoa mokowā ki te utu whakawhanui wera.
Q2: Me pēhea te whakatau mēnā kua pakaru te tinana o te poti?
A: Kati tonu te whakamahi mēnā ka puta ngā tohu e whai ake nei:
Ka kitea ngā kapiti, ngā pakaru rānei o te paninga e te kanohi tahanga.
Ko te paerewa rerekētanga o te ōritetanga o te paninga wafer kua neke atu i te 5% mō ngā puranga e toru karapīpiti.
Neke atu i te 10% te hekenga o te tohu korehau o te rūma tukatuka.
Q3: Waka karāpiti me te waka kuata, me pēhea te whiriwhiri?
Whakatau: Ko ngā poti karāpiti te mea e pai ake ana mō ngā mahi whakaputa papatipu, ko ngā poti kuata ia e whakaarohia ana mō ngā rangahau pūtaiao/ngā tukanga motuhake.
Whakatau:
Ahakoa teWaka PECVDEhara i te taputapu matua, engari ko te "kaitiaki puku" o te pumau o te tukanga. Mai i te kōwhiringa ki te tiaki, ko ia taipitopito ka noho hei pūwāhi matua mō te whakapai ake i te hua. Ko taku tumanako ka āwhina tēnei aratohu i a koe ki te wetewete i te kohu hangarau me te kimi i te otinga tino pai mō te whakaiti i te utu me te whakapai ake i te whai huatanga!
Wā tuku: Maehe-06-2025