Ndi chitukuko chosalekeza chaukadaulo wa semiconductor, mumakampani opanga ma semiconductor komanso ngakhale makampani opanga ma photovoltaic, zomwe zimafunikira pamtundu wapamtunda wa gawo lapansi kapena pepala la epitaxial ndizolimba kwambiri. Ndiye, ndi zotani zomwe zimafunikira pazakudya zopyapyala? Kutengansalu ya safiros mwachitsanzo, ndi zisonyezo ziti zomwe zingagwiritsidwe ntchito kuyesa mawonekedwe a pamwamba pa zopyapyala?
Kodi zizindikiro zowunikira zowola ndi chiyani?
Zizindikiro zitatu
Kwa zophika za safiro, zowunikira zake ndizopatuka kwathunthu (TTV), bend (Bow) ndi Warp (Warp). Magawo atatuwa palimodzi amawonetsa kusalala ndi makulidwe ofanana a chowotcha cha silicon, ndipo amatha kuyeza kuchuluka kwa kuphulika kwa mkatewo. The corrugation akhoza kuphatikizidwa ndi flatness kuti aone ubwino wa yopyapyala pamwamba.
Kodi TTV, BOW, Warp ndi chiyani?
TTV (Total Thickness Variation)
TTV ndiye kusiyana pakati pa makulidwe apamwamba ndi ocheperako a wafer. Izi ndizomwe zimagwiritsidwa ntchito poyesa kufanana kwa makulidwe a wafer. Mu njira ya semiconductor, makulidwe a chowotcha ayenera kukhala ofanana kwambiri padziko lonse lapansi. Miyezo nthawi zambiri imapangidwa m'malo asanu pawafa ndipo kusiyana kwake kumawerengedwa. Pamapeto pake, mtengo uwu ndi maziko ofunikira pakuwunika mtundu wa mkatewo.
Kugwada
Kugwada mukupanga kwa semiconductor kumatanthawuza kupindika kwa chowotcha, kumasula mtunda wapakati pa chowotcha chosakanizidwa ndi ndege yolozera. Mawuwa ayenera kuti amachokera ku kufotokoza mpangidwe wa chinthu chikapindika, monga ngati uta wopindika. Phindu la Bow limatanthauzidwa poyesa kupatuka pakati pakatikati ndi m'mphepete mwa chotupa cha silicon. Mtengo uwu nthawi zambiri umawonetsedwa mu ma micrometer (µm).
Warp
Warp ndi katundu wapadziko lonse wa ma wafer omwe amayesa kusiyana pakati pa mtunda wokwanira ndi wocheperako pakati pa chowotcha chopanda zopindika mwaufulu ndi ndege yolozera. Imayimira mtunda kuchokera pamwamba pa silicon wafer kupita ku ndege.
Kodi pali kusiyana kotani pakati pa TTV, Bow, Warp?
TTV imayang'ana kwambiri kusintha kwa makulidwe ndipo sikukhudzidwa ndi kupindika kapena kupotoza kwa mkate.
Bow imayang'ana pa bend yonse, makamaka poganizira kupindika kwapakati komanso m'mphepete.
Warp imakhala yokwanira, kuphatikiza kupindika ndi kupindika mbali yonse yophika.
Ngakhale magawo atatuwa akugwirizana ndi mawonekedwe ndi mawonekedwe a geometric a chotupa cha silicon, amayezedwa ndikufotokozedwa mosiyana, ndipo zotsatira zake pamayendedwe a semiconductor ndi kukonza kwawafa ndizosiyana.
Zing'onozing'ono za magawo atatu, zabwino, ndi zazikuluzikuluzikulu, zimakhala zovuta kwambiri pa ndondomeko ya semiconductor. Chifukwa chake, monga akatswiri a semiconductor, tiyenera kuzindikira kufunikira kwa magawo a wafer panjira yonseyi, kuchita semiconductor process, tiyenera kulabadira zambiri.
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Nthawi yotumiza: Jun-24-2024