Yadda ake zaɓa, amfani da kuma kula da jirgin ruwan PECVD?

1. Menene jirgin ruwan PECVD?

1.1 Ma'anar da ayyukan asali

Jirgin ruwan PECVD (Plasma Enhanced Chemical Vapor Deposition) babban kayan aiki ne da ake amfani da shi don ɗaukar wafers ko substrates a cikin tsarin PECVD. Yana buƙatar yin aiki daidai a cikin yanayin zafi mai yawa (300-600°C), iskar gas mai aiki da jini da kuma iskar gas mai lalata (kamar SiH₄, NH₃). Babban ayyukansa sun haɗa da:

● Daidaitaccen matsayi: tabbatar da tazara tsakanin wafer da kuma guje wa tsangwama a kan shafi.
● Kula da filin zafi: inganta rarraba zafin jiki da inganta daidaiton fim.
● Katangar hana gurɓata muhalli: Yana ware plasma daga ramin kayan aiki don rage haɗarin gurɓatar ƙarfe.

1.2 Tsarin gine-gine da kayan aiki na yau da kullun

Zaɓin kayan aiki:

● Jirgin ruwan graphite (zaɓin farko): yawan amfani da zafi, juriya ga zafin jiki mai yawa, ƙarancin farashi, amma yana buƙatar rufin da zai hana tsatsa.
●Jirgin ruwa na Quartz: Tsabta mai matuƙar ƙarfi, mai jure sinadarai, amma yana da matuƙar karyewa da tsada.
●Yumbura (kamar Al₂O₃): Yana jure lalacewa, ya dace da yawan samarwa, amma kuma yana da ƙarancin ƙarfin zafi.

Muhimman fasalulluka na ƙira:

● Tazarar rami: Kauri mai daidai da wafer (kamar haƙurin 0.3-1mm).
●Tsarin ramin kwararar iska: inganta rarrabawar iskar gas da rage tasirin gefen.
●Rufin saman: Rufin da aka yi da siC, TaC ko DLC (kamar carbon mai kama da lu'u-lu'u) don tsawaita tsawon lokacin aiki.

2. Me yasa dole ne mu kula da aikin jiragen ruwan PECVD?

2.1 Manyan abubuwa guda huɗu da ke shafar yawan amfanin gona kai tsaye

✔ Kula da Gurɓata Gurɓata:
Najasa a jikin jirgin ruwa (kamar Fe da Na) suna yin zafi a yanayin zafi mai yawa, suna haifar da ramukan filaye ko zubewa a cikin fim ɗin.
Barewar shafi zai haifar da barbashi kuma ya haifar da lahani a shafi (misali, barbashi sama da 0.3μm na iya haifar da raguwar ingancin batirin da kashi 0.5%).

✔ Daidaito tsakanin filayen zafi:
Rashin daidaiton isar da zafi na jirgin ruwan PECVD graphite zai haifar da bambance-bambance a cikin kauri na fim (misali, ƙarƙashin buƙatun daidaito na ±5%, bambancin zafin jiki yana buƙatar ƙasa da 10°C).

✔ Daidaitawar Plasma:
Kayan da ba su dace ba na iya haifar da fitar da ruwa mara kyau da kuma lalata wafer ko na'urar lantarki.

✔ Rayuwar sabis da farashi:
Ana buƙatar a sauya kwanukan jiragen ruwa marasa inganci akai-akai (misali sau ɗaya a wata), kuma kuɗin kulawa na shekara-shekara yana da tsada.

3. Yadda ake zaɓa, amfani da kuma kula da jirgin ruwan PECVD?

3.1 Hanyar zaɓi mai matakai uku

Mataki na 1: Bayyana sigogin tsari

● Yanayin zafin jiki: Za a iya zaɓar murfin Graphite + SiC a ƙasa da 450°C, kuma ana buƙatar quartz ko yumbu sama da 600°C.
●Nau'in iskar gas: Lokacin da ake ɗauke da iskar gas mai lalata abubuwa kamar Cl2 da F-, dole ne a yi amfani da rufin da ke da yawan gaske.
●Girman Wafer: Ƙarfin tsarin jirgin ruwa mai inci 8/12 ya bambanta sosai kuma yana buƙatar ƙira mai kyau.

Mataki na 2: Kimanta ma'aunin aiki

Ma'auni Masu Muhimmanci:

●Tsananin saman (Ra): ≤0.8μm (faɗin da aka taɓa yana buƙatar ya zama ≤0.4μm)
●Ƙarfin haɗin shafi: ≥15MPa (ASTM C633 misali)
●Nakasawar zafin jiki mai yawa (600℃): ≤0.1mm/m (gwaji na awanni 24)

Mataki na 3: Tabbatar da dacewa

● Daidaita kayan aiki: Tabbatar da girman haɗin kai tare da samfuran yau da kullun kamar AMAT Centura, centrotherm PECVD, da sauransu.
● Gwajin samar da gwaji: Ana ba da shawarar a gudanar da ƙaramin gwajin rukuni na guda 50-100 don tabbatar da daidaiton murfin (daidaitaccen karkacewar kauri na fim <3%).

3.2 Mafi Kyawun Hanyoyi Don Amfani da Kulawa

Bayanan Aiki:

✔Tsarin tsaftacewa kafin lokaci:

● Kafin amfani da shi na farko, ana buƙatar a yi wa Xinzhou ruwan zafi da sinadarin Ar na tsawon mintuna 30 domin cire dattin da ke shanyewa a saman.

●Bayan kowane tsari, ana amfani da SC1 (NH₄OH:H₂O₂:H₂O=1:1:5) don tsaftacewa don cire ragowar halitta.

✔ Ana loda haramtattun abubuwa:

●An haramta ɗaukar kaya fiye da kima (misali, an tsara matsakaicin ƙarfin da zai kai guda 50, amma ainihin nauyin ya kamata ya zama guda ≤ 45 don ajiye sarari don faɗaɗawa).

●Dole ne gefen wafer ɗin ya kasance ≥2mm nesa da ƙarshen tankin jirgin ruwa don hana tasirin gefen plasma.

✔ Nasihu don Tsawaita Rayuwa

● Gyaran Rufi: Idan yanayin saman Ra＞1.2μm ya yi tsauri, za a iya sake ajiye murfin SiC ta hanyar CVD (farashin ya yi ƙasa da kashi 40% idan aka kwatanta da wanda aka maye gurbin).

✔ Gwaji na yau da kullun:

● Kowane wata: Duba ingancin murfin ta amfani da hasken farin haske.
●Kwata-kwata: Yi nazarin matakin lu'ulu'u na jirgin ruwan ta hanyar XRD (kwale-kwalen wafer na quartz tare da matakin lu'ulu'u sama da 5%) yana buƙatar maye gurbinsa).

4. Waɗanne matsaloli ne suka fi yawa?

Q1: Shin za a iyaJirgin ruwan PECVDza a yi amfani da shi a cikin tsarin LPCVD?

A: Ba a ba da shawarar ba! LPCVD yana da zafi mafi girma (yawanci 800-1100°C) kuma yana buƙatar jure matsin lamba mai yawa na iskar gas. Yana buƙatar amfani da kayan da suka fi jure wa canjin zafin jiki (kamar isostatic graphite), kuma ƙirar ramin tana buƙatar la'akari da diyya ta faɗaɗa zafi.
T2: Ta yaya za a tantance ko jikin jirgin ruwan ya gaza?

A: A daina amfani da shi nan take idan alamun sun bayyana:
Ana iya ganin fasa ko ɓawon murfin da ido ba ya gani.
Daidaiton karkacewar daidaiton murfin wafer ya kasance >5% ga rukuni uku a jere.
Matsayin injin ɗagawa na ɗakin aiki ya faɗi da fiye da kashi 10%.

Q3: Jirgin ruwan Graphite da jirgin ruwan quartz, yadda ake zaɓa?

Kammalawa: Ana fifita jiragen ruwa na Graphite don yanayin samar da kayayyaki da yawa, yayin da ake la'akari da jiragen ruwa na quartz don binciken kimiyya/tsarin musamman.

Kammalawa:

Duk da cewaJirgin ruwan PECVDBa shine babban kayan aiki ba, shine "mai tsaron shiru" na daidaiton tsari. Daga zaɓi zuwa kulawa, kowane daki-daki na iya zama babban abin ci gaba don haɓaka yawan amfanin ƙasa. Ina fatan wannan jagorar zai taimaka muku shiga cikin hazo na fasaha kuma ku sami mafita mafi kyau don rage farashi da haɓaka inganci!