Ni gute wahitamo, wakoresha kandi ukabungabunga ubwato bwa PECVD?

1. Ubwato bwa PECVD ni iki?

1.1 Ibisobanuro n'imikorere y'ingenzi

Ubwato bwa PECVD (Plasma Enhanced Chemical Vapor Deposition) ni igikoresho cy'ingenzi gikoreshwa mu gutwara wafers cyangwa substrates muri gahunda ya PECVD. Bugomba gukora neza mu bushyuhe bwinshi (300-600°C), gazi ikoreshwa na plasma na gazi yangiza (nka SiH₄, NH₃). Imirimo yabwo y'ingenzi irimo:

● Gushyira ahantu neza: menya neza ko intera iri hagati y’imashini n’imashini ikoreshwa mu gutwikira imashini kandi wirinde ko imashini ivangavanga.
● Kugenzura ubushyuhe: kunoza uburyo ubushyuhe bukwirakwira kandi kunoza imiterere ya firime.
● Irinda umwanda: Itandukanya plasma n'aho ibikoresho biherereye kugira ngo igabanye ibyago byo kwanduzwa n'icyuma.

1.2 Imiterere n'ibikoresho bisanzwe

Guhitamo ibikoresho:

● Ubwato bwa grafiti (amahitamo rusange): ubushobozi bwo gutwara ubushyuhe bwinshi, ubushyuhe bwinshi, igiciro gito, ariko bisaba gusiga irangi kugira ngo hirindwe ingese ya gaze.
●Ubwato bwa Quartz: Isuku cyane, irwanya imiti, ariko irapfa kugwa kandi irahenze cyane.
●Ibumba (nka Al₂O₃): ririnda kwangirika, rikwiriye gukorwa mu buryo bwo hejuru, ariko ridafite ubushobozi bwo gutwara ubushyuhe bwinshi.

Ibiranga igishushanyo mbonera cy'ingenzi:

● Intera y'umwanya: Ubunini bwa wafer buhuye (nk'ubwo kwihanganira 0.3-1mm).
●Igishushanyo mbonera cy'umwobo w'umwuka unyuramo: kunoza ikwirakwizwa rya gaze mu buryo bw'ingufu no kugabanya ingaruka z'inkombe.
●Gutwikira hejuru: Gutwikira SiC isanzwe, TaC cyangwa DLC (ikaruboni isa na diyama) kugira ngo byongere igihe cyo kuyikoresha.

2. Kuki tugomba kwitondera imikorere y'ubwato bwa PECVD?

2.1 Ibintu bine by'ingenzi bigira ingaruka ku musaruro w'ibikorwa

✔ Kurwanya umwanda:
Imyanda iri mu bwato (nka Fe na Na) irahindagurika iyo ubushyuhe bwinshi bukabije, bigatera imyobo cyangwa amazi asohoka muri firime.
Gusiga irangi bizatera utunyangingo kandi bigatera inenge mu gusiga (urugero, utunyangingo turenze 0.3μm dushobora gutuma imikorere ya bateri igabanukaho 0.5%).

✔ Uburyo ikirere gishyuha gihuzwa n'ubushyuhe:
Gutanga ubushyuhe butaringaniye mu bwato bwa grafiti ya PECVD bizatuma habaho itandukaniro mu bugari bwa filime (urugero, hakurikijwe ibisabwa ku bunini bwa ± 5%, itandukaniro ry'ubushyuhe rigomba kuba munsi ya 10°C).

✔ Guhuza kwa plasma:
Ibikoresho bidakwiye bishobora gutuma habaho gusohora amazi ku buryo budasanzwe no kwangiza wafer cyangwa electrodes z'ibikoresho.

✔ Igihe serivisi imara n'ikiguzi cyayo:
Ubwato budafite ubuziranenge bugomba gusimburwa kenshi (urugero rimwe mu kwezi), kandi amafaranga yo kubungabunga buri mwaka arahenze.

3. Ni gute wahitamo, wakoresha kandi ukabungabunga ubwato bwa PECVD?

3.1 Uburyo bwo guhitamo bw'intambwe eshatu

Intambwe ya 1: Gusobanura ibipimo by'imikorere

● Ingano y'ubushyuhe: Igitambaro cya Graphite + SiC gishobora gutoranywa kiri munsi ya 450°C, kandi quartz cyangwa ceramic birakenewe hejuru ya 600°C.
●Ubwoko bwa gaze: Iyo irimo gaze zangiza nka Cl2 na F-, hagomba gukoreshwa irangi rinini.
●Ingano ya wafer: Ingufu z'ubwato za santimetero 8/santimetero 12 ziratandukanye cyane kandi zisaba igishushanyo mbonera.

Intambwe ya 2: Isuzuma ry'ibipimo by'imikorere

Ibipimo by'ingenzi:

●Ubukana bw'ubuso (Ra): ≤0.8μm (ubuso bugomba kuba ≤0.4μm)
●Ingufu zo gupfuka: ≥15MPa (isanzwe ya ASTM C633)
●Guhinduka k'ubushyuhe bwinshi (600℃): ≤0.1mm/m2 (ikizamini cy'amasaha 24)

Intambwe ya 3: Emeza ko bihuye

● Guhuza ibikoresho: Emeza ingano y'aho ukorera ukoresheje moderi zisanzwe nka AMAT Centura, centrotherm PECVD, n'izindi.
● Ikizamini cyo gukora igerageza: Ni byiza gukora ikizamini gito cy'ibice 50-100 kugira ngo harebwe niba irangi ringana (itandukaniro risanzwe ry'ubugari bwa firime <3%).

3.2 Uburyo bwiza bwo gukoresha no kubungabunga

Ibisobanuro by'imikorere:

✔Uburyo bwo gusukura mbere y'uko isuku ikorwa:

● Mbere yo gukoresha Xinzhou bwa mbere, igomba guterwa plasma ya Ar mu gihe cy'iminota 30 kugira ngo ikureho imyanda iri hejuru.

●Nyuma ya buri cyiciro cy'ibikorwa, SC1 (NH₄OH:H₂O₂:H₂O=1:1:5) ikoreshwa mu gusukura kugira ngo ikureho ibisigazwa by'ibinyabuzima.

✔ Gushyiramo amayeri yo gushakisha:

●Gupakira ibintu byinshi birabujijwe (urugero: ubushobozi ntarengwa bwagenewe ibice 50, ariko umutwaro nyakuri ugomba kuba ibice ≤ 45 kugira ngo habeho umwanya wo kwaguka).

●Inkombe y'agace k'ubwato igomba kuba iri hagati ya milimetero 2 n'inkombe z'ikigega cy'ubwato kugira ngo hirindwe ingaruka z'inkombe z'amaraso.

✔ Inama zo kongera igihe cyo kubaho

● Gusana irangi: Iyo ubuso bumeze nabi cyane Ra ＞1.2μm, irangi rya SiC rishobora kongera gushyirwamo na CVD (igiciro kiri hasi ya 40% ugereranije n'irisimburwa).

✔ Gupima buri gihe:

● Buri kwezi: Reba ubuziranenge bw'imvange y'urumuri rw'umweru.
●Buri gihembwe: Sesengura urugero rw'ubushyuhe bw'ubwato binyuze muri XRD (ubwato bwa quartz wafer bufite crystal phase > 5% bugomba gusimbuzwa).

4. Ni ibihe bibazo bikunze kubaho?

Q1: EseUbwato bwa PECVDgukoreshwa muri gahunda ya LPCVD?

A: Ntibyemewe! LPCVD ifite ubushyuhe bwinshi (ubusanzwe 800-1100°C) kandi igomba kwihanganira umuvuduko mwinshi wa gaze. Isaba gukoresha ibikoresho birwanya cyane impinduka z'ubushyuhe (nk'imashini ya graphite isostatic), kandi igishushanyo mbonera cy'aho imashini iherereye kigomba kuzirikana uburyo bwo kwagura ubushyuhe.
Q2: Ni gute wamenya niba ubwato bwarananiwe?

A: Hagarika gukoresha ako kanya niba ubonye ibimenyetso bikurikira:
Uduce cyangwa ibishishwa byo gupfuka bigaragara ku maso.
Itandukaniro risanzwe ry’ubunini bw’imvange ya wafer ryabaye >5% ku matsinda atatu yikurikiranya.
Igipimo cy'icyumba cy'imikorere cyagabanutseho ibirenze 10%.

Q3: Ubwato bwa Graphite vs. ubwato bwa quartz, uburyo bwo guhitamo?

Umwanzuro: Ubwato bwa grafiti bukundwa cyane mu bikorwa byinshi, mu gihe ubwato bwa quartz bufatwa nk'ubushakashatsi bwa siyansi/ibikorwa byihariye.

Umwanzuro:

NubwoUbwato bwa PECVDsi cyo gikoresho cy'ingenzi, ni "umurinzi ucecetse" w'uburyo ibintu bihora bihagaze. Kuva ku guhitamo kugeza ku kubungabunga, buri kantu kose gashobora kuba ingenzi mu kunoza umusaruro. Ndizera ko iyi nyandiko izagufasha kwinjira mu gihu cya tekiniki no kubona igisubizo cyiza cyo kugabanya ikiguzi no kunoza imikorere!