MMENE MUNGAPANGA CHIKWANGWANI CHA SILICON

MMENE MUNGAPANGA CHIKWANGWANI CHA SILICON

A chikwama cha mkatendi chidutswa cha silicon chokwana pafupifupi milimita imodzi chomwe chili ndi malo osalala kwambiri chifukwa cha njira zomwe zimakhala zovuta kwambiri paukadaulo. Kugwiritsa ntchito pambuyo pake kumatsimikiza njira yolima makristalo yomwe iyenera kugwiritsidwa ntchito. Mwachitsanzo, mu njira ya Czochralski, silicon ya polycrystalline imasungunuka ndipo kristalo woonda ngati pensulo amaviika mu silicon yosungunuka. Kenako kristalo wa mbewuyo amazunguliridwa ndikukokedwa pang'onopang'ono mmwamba. Colossus wolemera kwambiri, monocrystal, imachitika. N'zotheka kusankha mawonekedwe amagetsi a monocrystal powonjezera mayunitsi ang'onoang'ono a zinthu zoyera kwambiri. Makristalowo amapakidwa motsatira zomwe kasitomala akufuna kenako nkuwapukuta ndikudula mzidutswa. Pambuyo pa njira zina zowonjezera zopangira, kasitomala amalandira ma wafer ake omwe adasankhidwa mu phukusi lapadera, zomwe zimathandiza kasitomala kugwiritsa ntchito wafer nthawi yomweyo pamzere wake wopanga.

NJIRA YA CZOCHRALSKI

Masiku ano, gawo lalikulu la ma silicon monocrystals amalimidwa motsatira njira ya Czochralski, yomwe imaphatikizapo kusungunula polycrystalline high-purity silicon mu quartz crucible yoyera kwambiri ndikuwonjezera dopant (nthawi zambiri B, P, As, Sb). Kristalo woonda, monocrystalline mbewu amaviika mu silicon yosungunuka. Kristalo wamkulu wa CZ kenako amapangidwa kuchokera ku kristalo woonda uyu. Kuwongolera bwino kutentha ndi kuyenda kwa silicon yosungunuka, kuzungulira kwa kristalo ndi crucible, komanso liwiro lokoka kristalo kumapangitsa kuti monocrystalline silicon ingot ikhale yabwino kwambiri.

NJIRA YOYENDERA MALO OYANDA

Ma monocrystals opangidwa motsatira njira ya float zone ndi abwino kwambiri kugwiritsidwa ntchito mu zigawo za semiconductor zamagetsi, monga ma IGBT. Silikoni ya cylindrical polycrystalline ingot imayikidwa pamwamba pa induction coil. Mphamvu ya ma radio frequency electromagnetic field imathandiza kusungunula silicon kuchokera pansi pa ndodo. Mphamvu ya ma electromagnetic field imayendetsa kayendedwe ka silicon kudzera m'bowo laling'ono mu induction coil ndikulowa mu monocrystal yomwe ili pansi (njira ya float zone). Doping, nthawi zambiri yokhala ndi B kapena P, imachitika powonjezera zinthu za gaseous.