Printed Circuit Boards (PCBs) yog ib qho tseem ceeb ntawm cov khoom siv hluav taws xob niaj hnub no, ua lub hauv paus rau cov khoom siv uas ua rau cov khoom siv no ua haujlwm. PCBs muaj cov khoom siv substrate, feem ntau yog ua los ntawm fiberglass, nrog rau cov kev coj ua etched lossis luam tawm rau saum npoo los txuas rau ntau yam khoom siv hluav taws xob. Ib qho tseem ceeb ntawm PCB kev tsim khoom yog plating, uas ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ua haujlwm thiab kev ntseeg siab ntawm PCB. Hauv tsab xov xwm no, peb yuav delve rau hauv cov txheej txheem ntawm PCB plating, nws qhov tseem ceeb, thiab ntau hom plating siv hauv PCB manufacturing.
PCB Plating yog dab tsi?
PCB plating yog txheej txheem ntawm tso ib txheej nyias ntawm cov hlau mus rau saum npoo ntawm PCB substrate thiab cov txheej txheem conductive. Cov plating no ua haujlwm rau ntau lub hom phiaj, suav nrog kev txhim kho cov kev coj ua ntawm txoj hauv kev, tiv thaiv cov khoom siv tooj liab los ntawm oxidation thiab corrosion, thiab muab ib qho chaw rau cov khoom siv hluav taws xob rau hauv lub rooj tsavxwm. Cov txheej txheem plating feem ntau yog ua los ntawm kev siv ntau yam kev siv hluav taws xob, xws li electroless plating lossis electroplating, kom ua tiav qhov xav tau tuab thiab cov khoom ntawm cov txheej plated.
Qhov tseem ceeb ntawm PCB Plating
Plating ntawm PCBs yog qhov tseem ceeb rau ntau yam. Ua ntej, nws txhim kho cov conductivity ntawm txoj kev tooj liab, kom ntseeg tau tias cov teeb liab hluav taws xob tuaj yeem ntws tau zoo ntawm cov khoom siv. Qhov no yog qhov tseem ceeb tshwj xeeb hauv kev siv high-frequency thiab high-ceev qhov chaw teeb liab kev ncaj ncees yog qhov tseem ceeb. Tsis tas li ntawd, cov txheej txheej plated ua raws li kev tiv thaiv ib puag ncig xws li ya raws thiab cov kab mob, uas tuaj yeem ua rau qhov kev ua tau zoo ntawm PCB lub sijhawm. Tsis tas li ntawd, lub plating muab ib qho chaw rau soldering, tso cai rau cov khoom siv hluav taws xob kom ruaj ntseg txuas nrog lub rooj tsavxwm, tsim kev sib txuas hluav taws xob txhim khu kev qha.
Hom ntawm PCB Plating
Muaj ntau ntau hom plating siv hauv kev tsim PCB, txhua tus nrog nws cov khoom tshwj xeeb thiab kev siv. Qee yam ntawm ntau hom PCB plating muaj xws li:
1. Electroless Nickel Immersion Kub (ENIG): ENIG plating yog dav siv hauv PCB tsim vim nws zoo heev corrosion kuj thiab solderability. Nws muaj ib txheej nyias ntawm electroless npib tsib xee ua raws li ib txheej ntawm immersion kub, muab ib tug ca thiab du nto rau soldering thaum tiv thaiv lub hauv paus tooj liab los ntawm oxidation.
2. Electroplated Kub: Electroplated kub plating paub txog nws qhov tshwj xeeb conductivity thiab tsis kam rau tarnishing, ua rau nws haum rau cov ntawv thov uas yuav tsum tau muaj kev ntseeg siab thiab ntev. Nws yog feem ntau siv nyob rau hauv high-end electronic devices thiab aerospace applications.
3. Electroplated Tin: Tin plating feem ntau yog siv los ua tus nqi tsim nyog rau PCBs. Nws muaj qhov zoo solderability thiab corrosion kuj, ua rau nws haum rau kev siv dav dav uas tus nqi yog qhov tseem ceeb.
4. Electroplated Silver: Silver plating muab cov conductivity zoo heev thiab feem ntau yog siv nyob rau hauv high-frequency daim ntaub ntawv uas teeb liab kev ncaj ncees tseem ceeb heev. Txawm li cas los xij, nws yooj yim dua rau tarnishing piv rau kub plating.
Txheej Txheem Plating
Cov txheej txheem plating feem ntau pib nrog kev npaj ntawm PCB substrate, uas cuam tshuam nrog kev tu thiab ua kom lub ntsej muag kom ntseeg tau tias muaj kev adhesion ntawm cov txheej plated. Nyob rau hauv cov ntaub ntawv ntawm electroless plating, ib tug tshuaj da dej uas muaj cov plating hlau yog siv los tso ib tug nyias txheej mus rau lub substrate los ntawm ib tug catalytic cov tshuaj tiv thaiv. Ntawm qhov tod tes, electroplating yuav immersing PCB nyob rau hauv ib tug electrolyte tov thiab dhau ib tug hluav taws xob tam sim no los ntawm nws mus tso cov hlau rau saum npoo.
Thaum lub sij hawm plating txheej txheem, nws yog ib qho tseem ceeb los tswj lub thickness thiab uniformity ntawm plated txheej kom tau raws li cov kev cai ntawm PCB tsim. Qhov no yog ua tiav los ntawm kev tswj xyuas cov txheej txheem plating, xws li cov txheej txheem plating, qhov kub, qhov ceev tam sim no, thiab lub sijhawm plating. Kev tswj xyuas kev ua tau zoo, suav nrog kev ntsuas thickness thiab kev ntsuas adhesion, kuj tau ua los xyuas kom meej qhov kev ncaj ncees ntawm cov txheej plated.
Kev sib tw thiab kev txiav txim siab
Thaum PCB plating muaj ntau cov txiaj ntsig, muaj qee qhov kev sib tw thiab kev txiav txim siab cuam tshuam nrog cov txheej txheem. Ib qho kev sib tw ntau tshaj yog ua tiav cov txheej txheem plating tuab thoob plaws tag nrho PCB, tshwj xeeb tshaj yog nyob rau hauv cov qauv tsim nrog ntau qhov sib txawv. Kev txiav txim siab tsim nyog, xws li kev siv lub ntsej muag plating thiab tswj cov kab mob impedance, yog qhov tseem ceeb los xyuas kom meej cov plating sib xws thiab kev ua tau zoo ntawm hluav taws xob.
Kev txiav txim siab ib puag ncig kuj tseem ua lub luag haujlwm tseem ceeb hauv PCB plating, vim tias cov tshuaj lom neeg thiab cov khoom pov tseg tsim tawm thaum txheej txheem plating tuaj yeem cuam tshuam ib puag ncig. Raws li qhov tshwm sim, ntau lub tuam txhab PCB tau txais cov txheej txheem kev sib raug zoo ntawm ib puag ncig thiab cov khoom siv los txo qhov cuam tshuam rau ib puag ncig.
Tsis tas li ntawd, kev xaiv cov khoom siv plating thiab tuab yuav tsum ua raws li cov kev cai tshwj xeeb ntawm daim ntawv thov PCB. Piv txwv li, high-speed digital circuits yuav xav tau cov plating tuab kom txo cov teeb liab poob, thaum RF thiab microwave circuits yuav tau txais txiaj ntsig los ntawm cov khoom siv tshwj xeeb plating kom muaj kev ncaj ncees ntawm ntau zaus.
Yav tom ntej Trends hauv PCB Plating
Raws li thev naus laus zis txuas ntxiv mus ntxiv, thaj chaw ntawm PCB plating kuj tau hloov kho kom tau raws li qhov xav tau ntawm cov khoom siv hluav taws xob txuas ntxiv mus. Ib qho tseem ceeb tshaj plaws yog kev tsim cov khoom siv plating siab heev thiab cov txheej txheem uas muaj kev txhim kho kev ua tau zoo, kev ntseeg tau, thiab kev ruaj ntseg ib puag ncig. Qhov no suav nrog kev tshawb nrhiav lwm txoj kev plating hlau thiab qhov chaw tiav los daws qhov kev loj hlob nyuaj thiab cov khoom siv hluav taws xob me me.
Tsis tas li ntawd, kev sib koom ua ke ntawm cov txheej txheem plating siab, xws li mem tes thiab thim rov qab mem tes plating, tau txais traction kom ua tiav qhov loj me me thiab ntau dua qhov sib piv hauv PCB tsim. Cov txheej txheem no ua rau muaj kev tswj xyuas meej ntawm cov txheej txheem plating, uas ua rau muaj kev sib txig sib luag thiab sib xws thoob plaws PCB.
Hauv kev xaus, PCB plating yog qhov tseem ceeb ntawm PCB kev tsim khoom, ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev ua haujlwm, kev ntseeg siab, thiab kev ua haujlwm ntawm cov khoom siv hluav taws xob. Cov txheej txheem plating, nrog rau kev xaiv cov khoom siv plating thiab cov txheej txheem, cuam tshuam ncaj qha rau cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob ntawm PCB. Raws li thev naus laus zis txuas ntxiv mus, kev txhim kho cov txheej txheem plating tshiab yuav yog qhov tseem ceeb los ua kom tau raws li cov kev xav tau ntawm kev lag luam hluav taws xob hloov pauv, tsav tsheb mus txuas ntxiv thiab kev tsim kho tshiab hauv PCB kev tsim khoom.
T: PCB Plating: Nkag siab txog cov txheej txheem thiab nws qhov tseem ceeb
D: Printed Circuit Boards (PCBs) yog ib feem tseem ceeb ntawm cov khoom siv hluav taws xob niaj hnub no, ua lub hauv paus rau cov khoom siv uas ua rau cov khoom siv no ua haujlwm. PCBs muaj cov khoom siv substrate, feem ntau yog ua los ntawm fiberglass, nrog rau cov kev coj ua etched lossis luam tawm rau saum npoo los txuas rau ntau yam khoom siv hluav taws xob.
K: pcb plating
Post lub sij hawm: Aug-01-2024
