Hluav taws xob tiv taus yog ib qho khoom siv lub cev siv los piav txog cov khoom muaj peev xwm los tiv thaiv qhov ntws ntawm hluav taws xob tam sim no. Qhov siab dua qhov kev tiv thaiv, cov khoom siv hluav taws xob tsawg dua, ua rau nws tsim nyog siv los ua cov khoom siv insulating. Conversely, qis resistivity qhia tias cov khoom siv hluav taws xob yooj yim dua, ua rau nws tsim nyog siv los ua cov khoom siv. Nws yog ib qho tseem ceeb parameter nyob rau hauv kev txiav txim siab tsis kam ntawm ib yam khoom nyob rau hauv relation mus nws chav tsev ntev thiab cross-sectional cheeb tsam. Resistivity feem ntau txhais los ntawm lub cim **ρ (rho) ** thiab ntsuas hauv ** ohm-meters (Ω·m) **.
Resistivity yog ib qho tseem ceeb ntawm cov khoom. Yog tias qhov hluav taws xob tau siv rau cov khoom siv sib xws nrog cov ntu ntu sib xws thiab ntsuas tam sim no, tus nqi tiv thaiv tuaj yeem txiav txim siab siv tus qauv \(R=\frac{V}{I}\). Yog tias qhov chaw hla ntu (dav × qhov tob) thiab qhov ntev ntawm cov qauv paub, qhov kev tiv thaiv ntawm cov khoom tuaj yeem raug xam los ntawm cov txiaj ntsig kev ntsuas tsis kam, raws li tau piav qhia hauv daim duab hauv qab no.
Nws yog feem ntau tsim nyog los ntsuas cov ntawv resistivity ntawm tag nrho cov embedded txheej thiab hlau interconnect txheej. Resistivity feem ntau qhia nyob rau hauv "ohms ib square," txhais tau hais tias ib square ntawm homogeneous khoom yuav muaj tib yam tsis hais nws loj.
Resistivity yog cuam tshuam los ntawm tej yam xws li muaj pes tsawg leeg, kub, thiab impurities tam sim no nyob rau hauv cov khoom. Cov ntaub ntawv uas muaj kev tiv thaiv siab, xws li cov insulators, muaj kev tiv thaiv tseem ceeb rau kev khiav ntawm tam sim no, thaum cov ntaub ntawv uas tsis tshua muaj resistivity, xws li hlau, muaj kev tiv thaiv tsawg heev rau tam sim no ntws. Lub resistivity ntawm cov ntaub ntawv tseem ceeb nyob rau hauv ntau yam kev tshawb fawb thiab engineering, xws li electronics, ntaub ntawv science, thiab hluav taws xob engineering. Hauv electronics, resistivity plays lub luag haujlwm tseem ceeb hauv kev txiav txim siab kev ua haujlwm ntawm cov khoom siv hluav taws xob xws li resistors, capacitors, thiab semiconductors. Hauv cov khoom siv science thiab hluav taws xob engineering, resistivity yog siv los ua tus yam ntxwv thiab ntsuas hluav taws xob ntawm cov khoom sib txawv, suav nrog hlau, insulators, thiab semiconductors.
