PCB (luam tawm Circuit Board) yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob, uas txuas cov khoom siv hluav taws xob los ntawm cov kab hluav taws xob thiab cov ntsiab lus txuas. Hauv PCB tsim thiab tsim cov txheej txheem, metallized qhov thiab los ntawm lub qhov yog ob hom ntawm lub qhov, thiab lawv txhua tus muaj cov haujlwm tshwj xeeb thiab cov yam ntxwv. Hauv qab no yog cov ncauj lus kom ntxaws tsom xam ntawm qhov sib txawv ntawm PCB metallized qhov thiab los ntawm qhov.
Metallized qhov
Metallized qhov yog qhov hauv cov txheej txheem tsim PCB uas tsim cov txheej txheem hlau ntawm lub qhov phab ntsa los ntawm electroplating lossis tshuaj plating. Cov txheej no ntawm cov hlau, feem ntau yog ua los ntawm tooj liab, tso cai rau lub qhov los ua hluav taws xob.
Cov yam ntxwv ntawm metallized qhov:
1. Hluav taws xob conductivity:Muaj ib txheej hlau conductive rau ntawm phab ntsa ntawm lub qhov metalized, tso cai rau cov tam sim no ntws los ntawm ib txheej mus rau lwm qhov los ntawm lub qhov.
2. Kev ntseeg tau:Metalized qhov muab kev sib txuas hluav taws xob zoo thiab txhim khu kev ntseeg siab ntawm PCB.
3. Nqi:Vim tias cov txheej txheem plating ntxiv yuav tsum tau ua, tus nqi ntawm lub qhov hlau feem ntau yog siab dua li ntawm qhov tsis yog hlau.
4.Manufacturing txheej txheem:Kev tsim cov qhov metallized muaj cov txheej txheem electroplating los yog electroless plating.
5. Daim ntawv thov:Metallized qhov feem ntau siv hauv ntau txheej PCBS kom ua tiav cov hluav taws xob sib txuas ntawm cov txheej sab hauv
Qhov zoo ntawm metallized qhov:
1.Multi-layer kev twb kev txuas:Metallized qhov tso cai rau kev sib txuas hluav taws xob ntawm ntau txheej PCBS, pab kom ua tiav cov qauv tsim hluav taws xob.
2.Signal integrity:Txij li thaum lub qhov metallized muab txoj hauv kev zoo, nws yuav pab kom muaj kev ncaj ncees ntawm lub teeb liab.
3.Tam sim no nqa peev:Metallized qhov tuaj yeem nqa cov dej ntws loj thiab tsim nyog rau kev siv hluav taws xob siab.
Disadvantages ntawm metallized qhov:
1. Nqi:Tus nqi tsim khoom ntawm metallized qhov yog siab dua, uas tuaj yeem nce tag nrho cov nqi ntawm PCB.
2.Manufacturing complexity:Kev tsim cov txheej txheem ntawm metallized qhov yog qhov nyuaj thiab yuav tsum tau tswj cov txheej txheem plating.
3.Qhov phab ntsa thickness:Hlau plating tuaj yeem ua rau txoj kab uas hla ntawm lub qhov, cuam tshuam rau kev teeb tsa thiab tsim ntawm PCB.
Los ntawm Holes
Ib lub qhov los ntawm lub qhov yog lub qhov ntsug hauv PCB uas nkag mus rau tag nrho PCB pawg thawj coj saib, tab sis tsis tsim cov txheej hlau ntawm lub qhov phab ntsa. Lub qhov yog tsuas yog siv rau lub cev installation thiab kho cov khoom, tsis yog rau kev sib txuas hluav taws xob.
Cov yam ntxwv ntawm lub qhov:
1. Tsis-conductive:lub qhov nws tus kheej tsis muab kev sib txuas hluav taws xob, thiab tsis muaj hlau txheej ntawm phab ntsa ntawm lub qhov.
2. Lub cev sib txuas:Los ntawm lub qhov yog siv los kho cov khoom siv, xws li cov khoom sib txuas, mus rau PCB los ntawm vuam.
3. Nqi:Tus nqi tsim khoom los ntawm qhov feem ntau yog qis dua li ntawm qhov metallized.
4.Manufacturing txheej txheem:Los ntawm cov txheej txheem tsim lub qhov yog qhov yooj yim, tsis muaj txheej txheem plating.
5. Daim ntawv thov:Los ntawm qhov feem ntau yog siv rau ib leeg - lossis ob txheej PCBS, lossis rau kev teeb tsa hauv ntau txheej PCBS.
Qhov zoo ntawm lub qhov:
1.Cov txiaj ntsig zoo:Tus nqi tsim khoom ntawm lub qhov yog qhov tsawg, uas yuav pab txo tus nqi ntawm PCB.
2.Simplified tsim:Los ntawm qhov ua kom yooj yim rau PCB tsim thiab tsim cov txheej txheem vim nws tsis tas yuav plating.
3.Component mounting:Los ntawm qhov muab ib txoj hauv kev yooj yim thiab siv tau los txhim kho thiab ruaj ntseg plug-in Cheebtsam.
Disadvantages ntawm hla qhov:
1.Kev txwv kev sib txuas hluav taws xob:Lub qhov nws tus kheej tsis muab hluav taws xob sib txuas, thiab yuav tsum tau txuas txuas ntxiv lossis ncoo kom ua tiav kev sib txuas.
2.Signal kis txwv:Cov qhov hla tsis haum rau cov ntawv thov uas xav tau ntau txheej ntawm cov hluav taws xob sib txuas.
3.Component yam txwv:Lub qhov los ntawm lub qhov yog tsuas yog siv rau lub installation ntawm plug-in Cheebtsam thiab tsis haum rau nto mount Cheebtsam.
Xaus:
Metallized qhov thiab dhau-qhov ua si sib txawv hauv PCB tsim thiab tsim khoom. Lub qhov metallized muab cov hluav taws xob sib txuas ntawm cov khaubncaws sab nraud povtseg, thaum lub qhov los ntawm qhov feem ntau yog siv rau kev teeb tsa lub cev ntawm cov khoom. Hom lub qhov uas tau xaiv nyob ntawm qhov kev thov tshwj xeeb, kev xav txog tus nqi, thiab kev tsim qauv tsis yooj yim.