Hlau Core PCB txhais tau hais tias cov khoom siv tseem ceeb rau PCB yog cov hlau, tsis yog FR4 / CEM1-3, thiab lwm yam, thiab tam sim no, cov hlau feem ntau siv rauMCPCB manufacturers yog Aluminium, tooj liab, thiab hlau alloy. Aluminium muaj peev xwm hloov tau zoo thiab dissipation, tab sis tseem pheej yig dua; tooj liab muaj kev ua tau zoo dua tab sis kuj tseem kim dua, thiab cov hlau tuaj yeem muab faib ua cov hlau ib txwm thiab cov hlau tsis muaj steel. Nws yog nruj dua li txhuas thiab tooj liab, tab sis nws cov thermal conductivity qis dua lawv ib yam nkaus. Cov neeg yuav xaiv lawv tus kheej lub hauv paus / cov khoom tseem ceeb raws li lawv cov kev siv sib txawv.
Feem ntau hais lus, txhuas yog qhov kev xaiv nyiaj txiag tshaj plaws uas xav txog nws cov thermal conductivity, nruj, thiab tus nqi. Yog li ntawd, lub hauv paus / cov khoom tseem ceeb ntawm ib txwm Hlau Core PCB yog ua los ntawm txhuas. Nyob rau hauv peb lub tuam txhab, yog tias tsis muaj kev thov tshwj xeeb, los yog sau ntawv, cov tub ntxhais hlau xa mus yuav yog txhuas, ceshlau thaub qab PCB yuav txhais tau tias Aluminium Core PCB. Yog tias koj xav tau Copper Core PCB, Steel Core PCB, lossis Stainless hlau core PCB, koj yuav tsum ntxiv cov ntawv tshwj xeeb hauv daim duab.
Qee zaum tib neeg yuav siv lub npe "MCPCB", tsis yog lub npe tag nrho ntawm Hlau Core PCB, Hlau Core PCBs, lossis Hlau Core Printed Circuit Board. Thiab kuj siv cov lus sib txawv hais txog cov tub ntxhais / puag, yog li koj tseem yuav pom cov npe sib txawv ntawm Hlau Core PCB, xws li Hlau PCB, Hlau Base PCB, Hlau Backed PCB, Hlau Clad PCB, Hlau Core Board, thiab lwm yam. Covhlau core PCBs yog siv los ntawm cov tsoos FR4 lossis CEM3 PCBs vim tias muaj peev xwm ua kom muaj cua sov kom deb ntawm cov khoom. Qhov no yog ua tiav los ntawm kev siv Thermally Conductive Dielectric Layer.
Qhov sib txawv tseem ceeb ntawm FR4 board thiab ahlau raws PCB yog lub thermal conductivity ntawm cov khoom siv dielectric hauv MCPCB. Qhov no ua raws li tus choj thermal ntawm IC cov khoom thiab cov phaj hlau rov qab. Thaum tshav kub kub yog ua los ntawm lub pob los ntawm cov tub ntxhais hlau mus rau lub dab dej ntxiv. Ntawm FR4 lub rooj tsavxwm, cov cua sov tseem nyob twj ywm yog tias tsis hloov los ntawm cov tshuaj pleev ib ce. Raws li kev kuaj sim MCPCB nrog 1W LED tseem nyob ze ntawm qhov chaw ntawm 25C, thaum tib lub 1W LED ntawm FR4 pawg thawj coj mus txog 12C tshaj ambient. LED PCB ib txwm yog tsim nrog Aluminium core, tab sis qee zaum steel core PCB kuj raug siv.
Advantage ntawm hlau thaub qab PCB
1. Thaum tshav kub kub dissipation
Qee cov LEDs dissipate ntawm 2-5W ntawm tshav kub thiab tsis ua hauj lwm tshwm sim thaum tshav kub los ntawm LED tsis raug tshem tawm; LED lub teeb tso zis raug txo kom tsawg thiab degraded thaum lub tshav kub tseem nyob twj ywm nyob rau hauv lub pob LED. Lub hom phiaj ntawm MCPCB yog kom tshem tawm cov cua sov los ntawm txhua qhov ICs (tsis yog LEDs xwb). Aluminium puag thiab thermally conductive dielectric txheej ua raws li txuas hniav ntawm ICs thiab lub dab dej kub. Ib lub dab dej kub ib leeg yog mounted ncaj qha mus rau lub hauv paus aluminium tshem tawm qhov xav tau rau ntau lub dab dej kub nyob rau saum npoo ntawm cov khoom siv.
2. Thermal expansion
Thermal expansion thiab contraction yog cov xwm txheej ntawm cov khoom, CTE sib txawv ntawm thermal expansion. Raws li lawv tus kheej cov yam ntxwv, txhuas thiab tooj liab muaj qhov tshwj xeeb ua ntej rau ib txwm FR4, thermal conductivity tuaj yeem yog 0.8 ~ 3.0 W / c.K.
3. Dimensional stability
Nws yog qhov tseeb tias qhov loj ntawm cov hlau raws li PCB yog qhov ruaj khov dua li cov ntaub ntawv insulating. Kev hloov pauv loj ntawm 2.5 ~ 3.0% thaum Aluminium PCB thiab aluminium sandwich panels tau rhuab los ntawm 30 ℃ mus rau 140 ~ 150 ℃.