Printed Circuit Boards (PCBs) yog ib feem tseem ceeb ntawm txhua yam khoom siv hluav taws xob uas peb siv niaj hnub no. Lawv muab lub hauv paus rau cov khoom siv hluav taws xob, ua kom muaj kev ua haujlwm raug thiab kev sib txuas hluav taws xob. Txawm li cas los xij, thaum tsim lub PCB, xaiv cov khoom siv zoo tuaj yeem cuam tshuam rau kev ua tau zoo, kev ua haujlwm ntev, thiab kev ua tau zoo ntawm cov khoom kawg. Hauv blog no, peb yuav saib ntau yam los xav txog thaum xaiv cov khoom siv PCB.
Kawm txog cov ntaub ntawv PCB:
Muaj ntau hom PCB cov ntaub ntawv, txhua tus muaj cov khoom sib txawv thiab cov txiaj ntsig. Qee cov ntaub ntawv siv hauv PCB tsim muaj xws li FR-4, Polyimide, Rogers, thiab Aluminium. Los ntawm kev nkag siab txog cov khoom ntawm cov ntaub ntawv no, koj tuaj yeem txiav txim siab raws li koj qhov kev xav tau tsim.
Cov laj thawj uas yuav tsum xav txog:
1. Cov Khoom Siv Hluav Taws Xob: Cov khoom hluav taws xob ntawm cov khoom siv PCB ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab nws qhov tsim nyog rau ib daim ntawv thov tshwj xeeb. Xav txog cov khoom siv lub dielectric tas li, qhov poob qis, thiab poob tangent. Cov xwm txheej no cuam tshuam rau lub teeb liab kev ncaj ncees, kev tswj hwm impedance, thiab lub peev xwm tuav lub zog.
2. Thermal conductivity thiab tswj: lub peev xwm ntawm PCB cov ntaub ntawv kom dissipate tshav kub yog ib qho tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv high-power applications. Nrhiav cov ntaub ntawv uas muaj cov thermal conductivity siab kom ntseeg tau tias qhov zoo tshaj plaws cua sov dissipation thiab txo qhov kev pheej hmoo ntawm overheating thiab tiv thaiv tsis ua hauj lwm.
3. Mechanical zog thiab durability: Lub zog txhua yam ntawm cov khoom siv PCB txiav txim siab nws cov kev tsis haum rau kev ntxhov siab, kev co thiab dabtsi yog khoov. Nws yuav tsum muaj peev xwm tiv taus cov xwm txheej ib puag ncig uas siv PCB. Xav txog yam xws li lub zog tensile, lub zog flexural thiab cuam tshuam tsis kam.
4. Nqi thiab Muaj: Tus nqi thiab qhov muaj peev xwm sib txawv nyob rau hauv cov khoom siv PCB. Xav txog cov peev nyiaj faib rau qhov project thiab ntsuas nws tawm tsam cov yam ntxwv xav tau. Qee cov ntaub ntawv yuav muab kev ua tau zoo dua tab sis ntawm tus nqi siab dua, thaum lwm tus yuav raug nqi ntau dua tab sis muaj tsawg tsawg.
5. Cov txheej txheem tsim khoom: Cov khoom sib txawv PCB yuav tsum muaj txheej txheem tsim khoom sib txawv. Qee cov ntaub ntawv zoo dua rau cov tsoos los ntawm qhov sib dhos, thaum lwm tus yog qhov zoo dua rau kev siv tshuab saum npoo av (SMT). Nkag siab txog cov txheej txheem tsim khoom thiab kev sib raug zoo ntawm cov ntaub ntawv xaiv yog qhov tseem ceeb kom tsis txhob muaj teeb meem kev tsim khoom.
Case Study: Xaiv cov khoom PCB zoo rau kev siv ntau zaus:
Cia peb xav txog qhov xwm txheej: PCB yuav tsum muaj rau cov khoom siv sib txuas lus wireless. Hauv qhov no, cov khoom siv zoo li Rogers PCB yuav zoo tagnrho. Rogers cov ntaub ntawv muaj tsawg-tsawg dielectrics uas ua kom cov teeb liab tsawg tsawg ntawm cov zaus siab. Lawv kuj muaj cov thermal conductivity zoo heev, ua rau lawv haum rau cov qauv tsim hluav taws xob uas tsim kom muaj cua sov ntau.
Cov txheej txheem xaiv cov khoom siv PCB yog ib kauj ruam tseem ceeb hauv kev tsim khoom siv hluav taws xob. Los ntawm kev xav txog yam xws li hluav taws xob kev ua tau zoo, thermal conductivity, mechanical zog, nqi, muaj, thiab kev tsim khoom sib raug zoo, koj tuaj yeem xaiv cov khoom uas ua tau raws li koj qhov project. Nco ntsoov txheeb xyuas cov kev xav tau tshwj xeeb ntawm koj daim ntawv thov kom txiav txim siab paub. Ua tib zoo xaiv cov ntaub ntawv PCB yuav txhim kho kev ua tau zoo thiab kev ntseeg siab ntawm koj cov qauv siv hluav taws xob.
Post lub sij hawm: Sep-25-2023