Thermal hauv paus ntsiab lus thiab txhim kho cov tswv yim ntawm thermal interface cov ntaub ntawv

Nrog rau kev txhim kho cov khoom siv hluav taws xob niaj hnub no ntawm cov kab ke miniaturity, thiab kev sib xyaw ua ke, tshwj xeeb ntawm cov cuab yeej siv hluav taws xob, tshwj xeeb yog nyob hauv 5G daim teb. Yog li ntawd, kev tswj xyuas thermal zoo dua yog xav tau los daws qhov teeb meem no. Feem ntau hais lus, cov khoom siv hluav taws xob tsim hluav taws xob yuav tsum tau xa mus rau qhov chaw ntawm lub dab dej kub, thiab sau cov ntaub ntawv thermal interface (TIMs) ntawm cov khoom siv hluav taws xob thiab lub dab dej kub tuaj yeem ua kom muaj peev xwm hloov tau cov cua sov ntau tshaj plaws.

TIMs yog tsim los ntawm cov organic matrices thiab inorganic fillers. Yog li ntawd, tag nrho cov thermal conductivity ntawm TIMs yuav raug txiav txim los ntawm thermal conductivity ntawm polymers thiab inorganic muab tub lim, lub interfacial thermal kuj ntawm polymers thiab inorganic muab tub lim, thiab lub interfacial thermal kuj ntawm qhov chaw ntawm inorganic fillers. Lub thermal conductivity yog txiav txim siab los ntawm electrons lossis / thiab phonons, thiab cov cua sov uas tsim los ntawm cov nti tau xa mus rau lub dab dej kub los ntawm Tims, yog li ua tiav cov kev khiav ntawm cov cua kub dissipation system thiab cov khoom siv hluav taws xob txias.

Cov hluav taws xob hluav taws xob hluav taws xob feem ntau tshwm sim hauv cov khoom siv thermal conductive. Thaum cov ntaub ntawv no nyob rau hauv ib qho chaw tsis sib haum, electrons yuav diffuse los ntawm qhov siab mus rau qhov kub thiab txias, tsim cov khoom siv hluav taws xob thiab cov cua sov, uas ua rau hluav taws xob hluav taws xob. Nyob rau hauv xov xwm thiab tsis-conductive polymers, tshav kub conduction yog feem ntau phonon tshav kub conduction. Thaum ib sab ntawm cov khoom siv no yog cua sov, lub lattice ntawm cov khoom vibrates, thiab cov kev co sib thooj yog kis mus rau cov atoms uas nyob ib sab, uas ua rau hloov cov cua sov hauv cov khoom. Feem ntau, TIMs peb ntsib yog hom no. Raws li ib feem ntawm TIMs, inorganic non-metallic fillers muaj ib tug kuj tsis tu ncua lattice tis, thiab phonons muaj peev xwm propagate raws lattice kev taw qhia, feem ntau exhibiting zoo heev thermal conductivity; Hauv lwm qhov tseem ceeb ntawm cov khoom siv polymer, cov saw hlau polymer yog intertwined thiab tsis ua cov phonons ceev. Cov phonons no tau tawg heev ntawm cov saw hlau txuas polymer, uas ua rau txo qis hauv phonon ntws thiab txo qis hauv thermal conductivity. Yog li ntawd, txo qhov tawg ntawm phonons yog qhov tseem ceeb tshwj xeeb rau kev txhim kho thermal conductivity.

Cov txheej txheem kev tsim TIMs yog siv cov khoom siv inorganic nrog cov thermal conductivity siab. Txawm li cas los xij, vim tsis muaj thermal conductivity ntawm cov polymers, tag nrho cov thermal conductivity ntawm TIMs tsim nyob rau hauv txoj kev no feem ntau tsis zoo tagnrho vim lawv interface thermal kuj nrog inorganic fillers. Yog li ntawd, txo qhov kev cuam tshuam ntawm thermal tsis kam ntawm inorganic fillers thiab polymer, inorganic fillers thiab inorganic fillers, thiab tsim thermal conductivity txoj kev, los yog coj mus rau hauv tus account ob qho tib si, tau dhau los ua cov kev taw qhia rau kev txhim kho thermal conductivity ntawm TIMs.

Lub miniaturization thiab lub zog siab ntawm cov khoom siv hluav taws xob thiab cov khoom siv yuav tsum tau ua kom cov thermal conductivity ntawm thermal conductive cov ntaub ntawv tseem yuav tsum tau txhim kho tas li. Yog li ntawd, high thermal conductivity, zoo heev thixotropy, thiab zoo cia stability yog qhov tseem ceeb tshaj plaws kev tshawb fawb thiab kev loj hlob kev taw qhia ntawm thermal conductive cov ntaub ntawv.