Impeta zo gushyiramo CVDbigira uruhare runini mu gushushanya ibice bya semiconductor bigezweho binyuze mu gushimangira imipaka ya plasma no kwemeza ko iyoni ikwirakwira neza muri wafer. Iyi nkuru isobanura impamvu ari ingenzi ku ngingo zigezweho, igaragaza ingaruka zabyo ku buryo bungana, kugenzura CD, kugabanya ubwandu, no gutanga umusaruro muri rusange.
Ⅰ. Kuva ku gushushanya plasma kugeza ku gukora imashini zikoresha impeta
Gushushanya plasma ni imwe mu ikoranabuhanga ry’ingenzi cyane mu gukora semiconductor zigezweho, bigatuma habaho imiterere ya nanoscale ikenewe mu bikoresho bigezweho bya logic na memory. Uko ikoranabuhanga rikomeza kugabanuka munsi ya nanometero 10 n’imiterere y’ibikoresho ikagenda ihinduka ikagera ku miterere ya FinFET na Gate-All-Around (GAA), kwihanganira ihindagurika ry’imikorere byaragabanutse cyane. Muri iki gihe, ibipimo nka etch uniformity, critical dimension control (CD), n’ubucucike bw’ibisembwa bigomba kugenzurwa neza cyane.
Nubwo kunoza imikorere y’ibice by’umubiri akenshi bibanda kuri plasma chemistry, ingufu za radio frequency (RF), n’imiterere y’icyumba, ikintu cy’ingenzi kimwe—ariko akenshi kitagaragara cyane—ni ukugenzura imiterere y’imipaka ku nkengero za wafer. Aha niho impeta y’icyerekezo igira uruhare runini. Iherereye hafi ya wafer ku cyuma gikoresha amashanyarazi (ESC), impeta y’icyerekezo ikora nk’ihindura imipaka, ihindura imiterere y’amashanyarazi yo mu gace, ikomeza icyuma cya plasma, kandi ikerekana ko iyoni ikwirakwira ku buso bwose bwa wafer.
Mu bidukikije bigezweho byo gushushanya, impeta zo gushyiramo umwuka wa chemical vapor deposition (CVD) zabaye ihame mu nganda bitewe n’imiterere yazo myiza y’ibikoresho. Ibi bice si ibintu bishobora gukoreshwa gusa; ni ubuso bwakozwe neza bugira ingaruka ku mikorere ya plasma, kudahungabana kw’imikorere, kandi amaherezo bukagena umusaruro w’ibikoresho.
Ⅱ. Impamvu impeta zo gushushanya ari ingenzi mu gushushanya neza cyane
Mu buryo bwo gushushanya plasma, impande za wafer zigaragaza ukudakomeza haba mu miterere y'imiterere y'amashanyarazi ndetse no mu mipaka y'amashanyarazi. Hatabayeho ingamba zikwiye zo kwishyura, uku kudakomeza gutera guhindagurika gukomeye mu murima w'amashanyarazi no mu gishishwa cya plasma, bigatera icyo bita "ingaruka z'inkombe." Iyi ngaruka igaragara nk'inguni z'inguni za ion zidafite ishingiro hamwe n'ihindagurika ry'ubucucike bwa ion, bigatuma habaho gutandukana mu gipimo cya etch na etch profiles hafi y'inkombe ya wafer.
Ubushakashatsi bw’igerageza n’ubushakashatsi bwerekana ko, iyo nta buryo bwo gupima impande buhari, agace kagera kuri milimetero nyinshi kavuye ku nkengero za wafer kaba agace k’inkombe kadakoreshwa¹. Ku nsinga z’ikoranabuhanga rigezweho, aho ingano ya chip ari nini kandi ingano y’ibikorwa ikaba nto cyane, gutakaza ubwo buso ntibyemewe mu bukungu.
Gushyiramo impeta y'icyerekezo byagura neza umupaka wa plasma ukarenga inkombe ifatika ya wafer, bityo bigatuma habaho imiterere y'icyuma kimwe. Binyuze mu gutanga ibidukikije bigenzurwa n'amashanyarazi n'ibifatika, impeta y'icyerekezo igenzura ko inzira za iyoni ziguma zihuye cyane ku buso bwose bwa wafer. Ibi ni ingenzi kugira ngo hagerwe ku rugero rumwe rusabwa n'umusaruro ugezweho; muri ubwo buryo bw'inganda, intego yo guhuza ibishushanyo muri wafer akenshi ishyirwa mu rugero rwa ± 2%.
Byongeye kandi, mu gushimangira imiterere y'urukuta rw'icyumba mu buryo butuje, impeta yo kwibandaho ifasha kunoza uburyo bwo gusubiramo ibikorwa. Mu nganda zikora ibintu byinshi, ndetse n'ihindagurika rito mu miterere y'inkombe rishobora gutuma ibikorwa bihinduka; bityo, kudahungabana kw'imikorere y'inkombe yo kwibandaho ni ingenzi cyane.
Ⅲ. Agaciro k'ingenzi k'imyambaro ya CVD
Uko inzira zo gukata plasma zigenda zirushaho kuba nyinshi—cyane cyane bitewe n’uko hagiye hakoreshwa uburyo bwa fluorine na chlorine—ibikenewe ku bikoresho byo gushyiramo impeta zo gushushanya nabyo byararushijeho gukomera. Ibikoresho gakondo nka quartz cyangwa ceramic nyinshi bikunze kugira ikibazo cyo gukata plasma, ubushake bwo gukora uduce duto, no kudakomera neza mu gihe cy’igihe kirekire. Imyambaro ya CVD—cyane cyane CVD SiC (silicon carbide) na CVD carbone—itsinda neza izi mbogamizi bitewe n’imiterere yayo yihariye n’imiterere yayo ya shimi.
Ikintu cy'ingenzi kiranga irangi rya CVD ni ubucucike bwazo buri hejuru cyane, buri hafi y’ubucucike bw’imitekerereze, hamwe n’ubucucike bwazo buri hasi cyane, ibyo bikaba byongera cyane ubudahangarwa bwazo ku gucukura kw’amaraso bitewe na plasma. Ubushakashatsi bwagaragaje ko mu gace ka plasma gashingiye kuri fluorine, igipimo cy’ikirahure cya CVD SiC ari igice gito cyane ugereranyije n’icya quartz, bigatuma iba ibikoresho byiza byo gucukura igihe kirekire kandi gifite imbaraga nyinshi. Uku gukomera kwiyongereye bivuze ko ibice bimara igihe kirekire kandi bigatakaza inshuro nyinshi zo kubibungabunga.
Ikindi kandi, ikibazo cyo kurwanya ubwandu ni ingenzi. Uduce duto twakozwe n'ibice by'icyumba dukomeje kuba imwe mu mpamvu z'ingenzi zitera igihombo mu nganda zikora ibikoresho bya semiconductor. Dukurikije amahame ya SEMI n'inyigo zijyanye no kurwanya ubwandu, ndetse n'uduce duto twa sub-micron dushobora gutera inenge zikomeye, cyane cyane mu duce duto tw'imikorere turi munsi ya nanometero 10. Udupira twa CVD, dufite imiterere y'ubuso bunini kandi buhamye, tugabanya cyane ibyago byo kwangirika no gusohora umwanda ku buso, bityo bigafasha mu gushyiraho ibidukikije byiza kandi binoze umusaruro.
CVD SiC Film Crystal n'imiterere mito
Ikindi kintu cy'ingenzi ni ukugenzura imyuka ya elegitoroniki ya kabiri (SEE). Imikoranire iri hagati ya plasma n'ubuso bw'icyumba iterwa cyane n'imiterere ya SEE, ibyo bigatuma bigira ingaruka ku bucucike bwa plasma no ku guhagarara kwayo. Ugereranyije n'ibikoresho bisanzwe, ubuso butwikiriwe na CVD bugaragaza imiterere ya SEE ihamye kandi iteganijwe, bigatuma habaho kugenzura neza imiterere ya plasma no kunoza uburyo bwo gusubiramo ibikorwa.
Gukomera ku bushyuhe ni ikindi cyiza cy'ingenzi cy'imyambaro ya CVD. Imikorere ya plasma ifite ubucucike bwinshi ikunze gutanga ubushyuhe bwinshi, cyane cyane mu duce twa wafer edge. Ibikoresho nka CVD SiC bifite ubushobozi bwo gutwara ubushyuhe bwiza kandi bishobora kwaguka mu buryo bugenzurwa, bigabanya neza ibyago byo kwangirika, guhindagurika, cyangwa gutandukana mu gihe cy'ubushyuhe bukabije. Ubu buziranenge bw'imiterere ni ingenzi cyane mu gutuma habaho imikorere ihoraho mu gihe cy'ingendo nyinshi.
Ⅳ. Ingaruka ku bipimo by'imikorere yo gushushanya by'ingenzi
Impeta yo kwibandaho ya CVD ihujwe
Iyi mpeta y'icyerekezo izagira ingaruka zitaziguye kandi zishobora gupimwa ku bipimo byinshi by'ingenzi by'imikorere mu mikorere ya semiconductor etching. Kimwe mu bipimo by'ingenzi cyane ni ubuziranenge bw'ibumba. Mu gushimangira sheath ya plasma no kwemeza ko ikwirakwizwa ry'iyoni ringana, impeta z'icyerekezo za CVD zituma habaho kugenzura neza ubuziranenge bwa wafer, akenshi zikagera ku buziranenge bwa ± 2% bukenewe mu gukora ibikoresho bigezweho. Uru rwego rwo kugenzura ni ingenzi cyane cyane ku mikorere yo gushushanya ifite igipimo cyo hejuru, aho no kunyuranya guto bishobora gutuma habaho ihindagurika rikomeye ry'imiterere ya etch.
Kugenzura Ibipimo by'Icyerekezo (CD)
Ihindagurika ry’inguni z’inguni za ion ku nkengero za wafer rishobora gutera ihindagurika rya CD, kandi iki kibazo kirushaho kugorana uko ingano y’ibikoresho ikomeza kugabanuka. Mu kubungabunga imiterere y’amashanyarazi ihoraho, impeta yo kwibandaho ifasha kwemeza ko inzira za ion zihuye, bityo bikagabanya ihindagurika rya CD muri wafer yose. Ibi ni ingenzi mu kubungabunga imikorere y’igikoresho no kubahiriza imiterere yacyo ku nkuta zigezweho.
Kongera Uburyo bwo Gusubiramo no Gutuza
Irangi rya CVD ritanga ubuso buhamye kandi burambye, bufite imiterere ihoraho uko igihe kigenda gihita, bityo bikagabanya imiterere y’amaraso mu mubiri kandi bigatuma habaho imikorere ihamye mu mikorere ya wafer. Mu nganda zikora ibintu byinshi, ibi ni ingenzi mu gushyira mu bikorwa igenzura ry’imikorere y’ibarurishamibare (SPC).
Imikorere yo Kugenzura Ibice Bitandukanye
Kugabanuka kwangirika no kunoza ubuziranenge bw'ubuso bigabanya umusaruro w'udusimba, ibyo bikaba bigira ingaruka ku musaruro no ku kwizerwa kw'ibikoresho. Mu nganda zigezweho za semiconductor, aho intego zo kugenzura ubucucike bw'ibice by'umubiri ziba zikomeye cyane, iyi nyungu yonyine irahagije kugira ngo igaragaze ikoreshwa ry'ibice bya CVD.
Uko ibyifuzo by'inganda za semiconductor ku bijyanye no kugenzura neza ibikorwa n'imikorere y'ibikoresho bikomeza kwiyongera, iterambere n'itangwa ryabyoImpeta zo kwibandaho zifite CVDzikomeje kwiyongera mu nganda nke zihariye zikora ibintu bitandukanye, zikoresha ikoranabuhanga. Ibigo nkaHekkaruboni, Vetek Semiconductor, naSemicerabashyizeho umwanya ukomeye ku isoko muri uru rwego binyuze mu ikoranabuhanga ryabo rigezweho ryo gusiga irangi rya CVD, ubushobozi bwo gutunganya ibikoresho byo mu bwoko bwa "high-purity", no guhuza byimbitse n'ibikenewe mu bikoresho bya "semiconductor". By'umwihariko, amasosiyete nka Vetek na Semicera yibanda ku gutanga ibisubizo by'ubuhanga byihariye, guhuza imiterere y'impeta zigomba kwitabwaho hakurikijwe imiterere yihariye ya "etch chemistry" n'ibikoresho; mu gihe Hexcarbon yubatse izina rikomeye ku isoko rishingiye ku buhanga bwayo mu gukora grafiti yo mu bwoko bwa "high-purity" n'ibice bitwikiriye kugira ngo bikoreshwe muri "semiconductor". Uku guhuza ubumenyi mu bumenyi bw'ibikoresho n'ubumenyi mu ikoranabuhanga mu gutunganya ibintu bituma aya masosiyete ashobora guhaza ibyifuzo bikomeye byo gukora "semiconductor" zo mu cyiciro gikurikira.
Amareferensi:
"Amahame yo gusohora plasma no gutunganya ibikoresho"
"Ikinyamakuru cy'Ubumenyi n'Ikoranabuhanga mu by'Isuku"
Igihe cyo kohereza ubutumwa: Werurwe-20-2026