2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Vim tias qhov sib txawv ntawm qhov sib txawv me me rau cov khoom siv semiconductors, doping nrog me me ntawm impurities tuaj yeem ua rau cov khoom siv hluav taws xob nce ntxiv. Doping, yog li ntawd, tso cai rau cov kws tshawb fawb los siv cov khoom ntawm cov khoom siv hu ua "dopants" txhawm rau hloov kho cov conductivity ntawm ib qho semiconductor.
Yuav ua li cas doping txhim kho conductivity ntawm ib tug semiconductor?
txheej txheem ntawm kev ntxiv impurity atoms rau ntshiab semiconductor lossis ib qho khoom siv hauv nruab nrab hu ua "doping". … Txij li thaum, tus naj npawb ntawm cov hluav taws xob dawb nce los ntawm qhov sib ntxiv ntawm impurity, nws yuav pab ntxiv rau hauv kev coj ua. Los ntawm cov txheej txheem zoo li no, doping ua rau cov khoom siv hluav taws xob ntau ntxiv.
Lub hom phiaj ntawm doping yog dab tsi?
Doping yog cov txheej txheem siv los hloov cov lej ntawm cov hluav taws xob thiab qhov hauv cov khoom siv hluav taws xob. Doping tsim N-hom khoom thaum cov khoom siv semiconductor los ntawm pawg IV yog doped nrog pawg V atoms. Cov ntaub ntawv P-hom yog tsim thaum cov khoom siv semiconductor los ntawm pawg IV yog doped nrog pawg III atoms.
Dab tsi yog qhov zoo ntawm doping ib lub semiconductor?
Qhov tseem ceeb rau lawv txoj haujlwm yog txheej txheem hu ua doping, uas cuam tshuam nrog cov khoom tsis huv rau hauv semiconductor los txhim kho nws cov hluav taws xob conductivity. Nws yog qhov no uas tso cai rau ntau yam khoom siv hauv lub hnub ci thiab cov ntxaij vab tshaus LED ua haujlwm.
Dab tsi yog qhov ua rau siab doping?
Nyob zoosiab doping qib wave pob ntawv cuam tshuam nrog qis-zog conduction-band electrons tuaj yeem sib tshooj ntau dua ib qho impurity atom, uas ua rau qis qis qis vim tias lub zog muaj peev xwm txo qis.
Pom zoo:
Puas tau nce lossis nce siab?
ib nce toj; kev nce toj nce toj: Nws yog qhov ntev nce mus rau saum toj. qhov chaw nce toj: Lub ncov ntawd yog qhov nce siab heev. nce toj, … kom thim rov qab, raws li kev xav lossis txoj haujlwm tsis muaj zog: Nws raug yuam kom nce los ntawm nws txoj haujlwm tsis tuaj yeem.
Tau nce lossis tau nce?
I tau ncetxhais tau tias koj tab tom hais txog qhov koj tau txais los txog niaj hnub no. Kuv tau txais yog hais txog qhov kev paub uas koj tau txais yav dhau los. Tsis tshua muaj neeg yuav xav tias koj tsis tau txais kev paub, tsis ntev los no, yog tias koj hais tias kuv tau txais.
Lub sijhawm nce siab nce lub zog nqa yog?
nyob rau hauv kev nce siab, yog tag nrho upwards ntsug quab yuam los ntawm txhua qhov chaw (tis, tail, engines, fuselage) loj dua, lossis sib npaug ntawm qhov hnyav ntawm lub dav hlau. Nyob rau hauv ib tug ruaj khov nce, net ntsug quab yuam yuav tsum yog xoom, yog li net ntsug aerodynamic quab yuam yuav tsum sib npaug rau qhov hnyav.
Puas yog txoj kev taug kev nce mus nce mus rau parish dej qhib?
NO YOG IB TUG TSEEM CEEB NTAWM: Ascension Parish OHSEP: Raws li ntawm tag kis no tag nrho Ascension Parish waterways tseem qhib rau kev ua si hauv nkoj tab sis qeeb qeeb. Cov neeg caij nkoj tau hais kom ceev faj thiab… Pab pawg ntseeg twg yog Ascension Parish muaj?
Puas tus nqi marginal nce raws li cov zis nce?
Marginal Cost yog tus nqi nce ntxiv los ntawm kev tsim ib qho ntxiv ntawm qhov zoo. Lub Marginal Cost Curve yog U zoo li vim thaum pib thaum lub tuam txhab nce nws cov txiaj ntsig, tag nrho cov nqi, nrog rau cov nqi sib txawv, pib nce ntawm tus nqi qis.
