1, cov ntsiab lus tseem ceeb ntawm PCB Board cov ntaub ntawv
PCB Board cov ntaub ntawv, tseem hu ua PCB substrate, yog cov khoom tseem ceeb rau kev txhawb nqa thiab insulating cov laug cam hluav taws xob. Nws cov kev ua haujlwm yooj yim yog kom ntseeg tau tias qhov kev ua haujlwm ib txwm ntawm cov ntawv luam tawm hluav taws xob los ntawm kev muab kev txhawb nqa hluav taws xob thiab kev sib cais hluav taws xob. Muaj ntau hom pcb board cov ntaub ntawv, suav nrog fiberglassFr -4, Txhuas substrate, thiab lwm yam kev ua tau zoo ntawm cov ntaub ntawv sib txawv ntawm pcb
2, PCB board cov khoom siv
1. Coefficient ntawm thermal expansion
Qhov ntsuas kub ntawm cov ntawv luam tawm hluav taws xob hloov pauv thaum lub sijhawm ua haujlwm, ua rau cov khoom siv thermal no coefficient ntawm pcb board cov ntaub ntawv tseem ceeb rau kev ntsuas lawv cov khoom siv. Tus me me ntawm coefficient ntawm thermal expansion, qhov ntau ruaj khov qhov loj me thiab cov duab ntawm cov luam tawm cov board tuaj yeem raug tswj, ua rau nws txhim khu kev qha ntau. Lub thermal expansion coefficient ntawm feem ntau siv pcb board cov ntaub ntawv xws li fr {{0} 13-18 ppm / degree.
2. Thermal conductivity coefficient
Lub thermal conductivity ntawm PCB board cov khoom kuj tseem yog ib qho ntawm nws cov khoom siv. Pcb Board cov ntaub ntawv nrog cov thermal zoo hloov kho cua sov rau cov cua sov socution ntawm tshav kub discuitate ntawm cov ntawv luam tawm cov boardcienticia. Lub thermal conductivity ntawm txhuas substrate feem ntau ntawm 1. {}}}}}} Yog qhov tsawg, feem ntau tsuas yog nyob ib ncig {4}}. 1W / MK.
3. Rwb thaiv tsev ua haujlwm
Rwb thaiv tsev kev ua tau zoo ntawm PCB board cov ntaub ntawv kuj yog ib qho ntawm cov ntsiab lus uas yuav tsum tau txiav txim siab thaum tsim khoom lag luam cov kab hlau circuit Court. Pcb Board cov ntaub ntawv nrog cov kev ua tau zoo rwb thaiv tsev tuaj yeem zam kev teeb meem xws li luv luv hluav taws xob thiab cuam tshuam ntawm cov laug cam ntawm cov laug cam. Fiberglass thiab fr -4} tsis muaj pcb board nrog kev ua haujlwm zoo.
3, Xaiv thiab Daim Ntawv Thov
1. Xaiv cov ntaub ntawv PCB tsim nyog
Thaum xaiv PCB cov ntaub ntawv, nws yog ib qho tsim nyog los xaiv raws li cov kev thov tshwj xeeb. Feem ntau hais lus, fr -4 Yog cov khoom siv uas nyiam ua rau cov khoom lag luam dav dav vim nws cov kev ua haujlwm insurulation zoo, raug nqi, thiab txheej txheem. RauCov Khoom Siv Hluav Taws Xob Loj Zog Hluav Taws Xob, nws yog ib qho tsim nyog los xaiv cov ntaub ntawv nrog kev ua haujlwm zoo, xws li PTFE.
2. Tsim nyog daim ntawv thov ntawm PCB board cov ntaub ntawv
Thaum siv PCB cov ntaub ntawv pcb, nws yog qhov tsim nyog yuav tsum siv rau lawv tsim nyog raws li kev tsim qauv thiab tsim khoom lag luam. Piv txwv li, thaum kev tsim cov high-ntom cov ntawv luam tawm hluav taws xob, nws yog qhov tsim nyog los txhim kho cov khoom siv pcb los txhim kho nws lub zog thiab tawv ncauj, yog li zam cov teeb meem xws li deformation.