Yog vim li cas kub plating ntawm PCB boards

1. PCB board nto tiav:

Anti-oxidation, HASL, lead-free HASL, immersion kub, immersion tin, immersion silver, hard kub plating, tag nrho cov board kub plating, kub ntiv tes, npib tsib xee-palladium OSP: qis nqi, zoo solderability, hnyav cia tej yam kev mob, lub sij hawm luv luv, Environmentally friendly technology, zoo vuam, thiab du.

HASL: HASL board feem ntau yog ntau txheej (4-46 txheej) high-precision PCB template. Nws tau siv los ntawm ntau qhov loj hauv kev sib txuas lus hauv tsev, khoos phis tawj, khoom siv kho mob thiab chaw lag luam aerospace thiab cov chaw tshawb fawb. Nws muaj tus ntiv tes golden (txuas ntiv tes). Nws yog qhov sib txuas ntawm lub cim xeeb stick thiab lub cim xeeb qhov. Tag nrho cov teeb liab kis tau los ntawm tus ntiv tes kub.

Cov ntiv tes kub yog tsim los ntawm ntau cov kev sib cuag golden. Vim hais tias qhov saum npoo yog kub-plated thiab cov conductive contacts yog teem xws li cov ntiv tes, lawv hu ua "gold fingers".

Cov ntiv tes kub tau raug them nrog txheej kub ntawm lub rooj tsav xwm tooj liab los ntawm cov txheej txheem tshwj xeeb, vim tias kub tsis tshua muaj oxidation thiab muaj zog conductivity.

Txawm li cas los xij, vim yog tus nqi siab ntawm kub, tam sim no ntau lub cim xeeb yog hloov los ntawm tin plating. Txij li thaum xyoo 1990, cov ntaub ntawv tin tau nrov heev. Tam sim no, yuav luag tag nrho cov "ntiv tes kub" ntawm motherboards, nco thiab graphics phaib yog siv. Cov khoom siv tin, tsuas yog qee qhov kev ua haujlwm siab / chaw ua haujlwm cov khoom siv sib txuas lus yuav txuas ntxiv siv kub plating, uas yog kim heev.

2. Vim li cas thiaj siv cov phaj kub-plated?

Raws li ICs dhau los ua kev sib koom ua ke, IC pins ua ntom ntom. Txoj kev ntsug HASL yog qhov nyuaj rau tshuab cov ntaub qhwv nyias, uas ua rau SMT mounting nyuaj; Tsis tas li ntawd, lub txee lub neej ntawm cov tshuaj tsuag tin phaj yog luv heev.

Cov phaj kub-plated tsuas yog daws cov teeb meem no:

1. Rau cov txheej txheem nto mount, tshwj xeeb tshaj yog rau 0603 thiab 0402 ultra-me me nto mounts, lub flatness ntawm solder ncoo yog ncaj qha cuam tshuam rau qhov zoo ntawm solder paste printing txheej txheem thiab muaj ib tug txiav txim zoo ntawm cov tom ntej reflow soldering zoo. Yog li ntawd, tag nrho board Kub plating feem ntau pom nyob rau hauv high-density thiab ultra-me me nto mount txheej txheem.

2. Nyob rau hauv lub sij hawm mus sib hais ntau lawm, vim muaj tej yam xws li tivthaiv procurement, nws yog feem ntau tsis muaj peev xwm mus solder lub rooj tsavxwm sai li sai tau los. Hloov chaw, peb feem ntau yuav tsum tau tos ob peb lub lis piam lossis ntau lub hlis ua ntej siv nws. Lub neej txee ntawm kub-plated boards yog ntev tshaj li cov hlau lead. Pewter alloy yog ntau zaus ntev dua, yog li txhua tus neeg zoo siab siv nws.

Dhau li ntawm, tus nqi ntawm kub-plated PCB nyob rau hauv prototyping theem yog yuav luag tib yam li cov hlau lead-tin alloy phaj.

Tab sis raws li kev xaim ua kom ntom ntom, kab dav thiab qhov sib txawv tau mus txog 3-4MIL.

Qhov no coj txog qhov teeb meem ntawm kub hlau luv luv Circuit Court: raws li qhov zaus ntawm lub teeb liab yuav siab dua thiab siab dua, cov teeb liab kis tau tus mob nyob rau hauv ntau lub coatings vim cov nyhuv ntawm daim tawv nqaij muaj kev cuam tshuam rau cov teeb liab zoo.

Cov nyhuv ntawm daim tawv nqaij yog hais txog: high-frequency alternating tam sim no, lub tam sim no yuav nyiam ntws concentrated nyob rau saum npoo ntawm cov hlau. Raws li kev suav, qhov tob ntawm daim tawv nqaij yog cuam tshuam nrog zaus.

Txhawm rau daws cov teeb meem saum toj no ntawm cov laug cam kub, PCBs siv cov laug cam uas muaj kub kub feem ntau muaj cov yam ntxwv hauv qab no:

1. Vim hais tias cov qauv siv lead ua los ntawm immersion kub thiab kub plating yog txawv, immersion kub yuav golden yellower dua kub plating, thiab cov neeg muas zaub yuav txaus siab.

2. Immersion kub yog yooj yim rau weld dua kub plating thiab yuav tsis ua rau vuam tsis zoo los yog cov neeg tsis txaus siab.

3. Txij li thaum lub immersion kub board tsuas muaj npib tsib xee kub ntawm lub ncoo, lub teeb liab kis tau tus mob nyob rau hauv daim tawv nqaij nyhuv yog nyob rau hauv lub tooj liab txheej thiab yuav tsis cuam tshuam lub teeb liab.

4. Vim hais tias cov qauv siv lead ua ntawm immersion kub yog denser dua kub plating, nws tsis tshua muaj oxidation.

5. Txij li thaum lub phaj kub immersion tsuas muaj npib tsib xee kub ntawm lub ncoo, nws yuav tsis tsim cov xov hlau kub thiab ua rau luv luv.

6. Vim hais tias lub immersion kub board tsuas muaj npib tsib xee kub ntawm lub ncoo, lub solder tiv thaiv nyob rau hauv lub Circuit Court yog ruaj khov kho nrog cov tooj liab txheej.

7. Qhov project yuav tsis cuam tshuam qhov sib nrug thaum them nyiaj.

8. Vim tias cov qauv siv lead ua uas tsim los ntawm immersion kub thiab kub plating yog txawv, qhov kev ntxhov siab ntawm immersion kub phaj yog yooj yim los tswj. Rau cov khoom uas muaj kev sib raug zoo, nws yog qhov tsim nyog rau kev sib koom ua ke. Nyob rau tib lub sij hawm, nws yog precisely vim immersed kub yog softer dua kub plating uas kub ntiv tes ua los ntawm immersed kub daim hlau tsis hnav-resistant.

9. Lub tiaj tus thiab kev pabcuam lub neej ntawm cov phaj kub immersed yog zoo li cov phaj kub-plated.

Rau cov txheej txheem kub plating, tin daim ntawv thov cov nyhuv yog txo qis, thaum lub tin daim ntawv thov nyhuv ntawm immersion kub yog zoo dua; tshwj tsis yog cov chaw tsim khoom xav tau kev khi, feem ntau cov tuam txhab tam sim no yuav xaiv cov txheej txheem immersion kub nyob rau hauv rooj plaub no, PCB nto kho raws li hauv qab no:

Kub plating (electroplating, immersion kub), nyiaj plating, OSP, HASL (lead thiab lead-free).

Cov hom no feem ntau yog rau cov laug cam xws li FR-4 lossis CEM-3. Cov ntaub ntawv hauv paus thiab txoj kev kho saum npoo ntawm txheej nrog rosin; Yog tias qhov teeb meem ntawm daim ntawv thov tin tsis zoo (kev noj zaub mov tsis zoo) raug cais tawm, cov tshuaj nplaum thiab lwm cov chaw tsim khoom raug tshem tawm. Vim ntau lawm thiab khoom siv technology vim li cas.

Ntawm no peb tsuas tham txog cov teeb meem PCB. Muaj ntau yam laj thawj:

1. Thaum luam ntawv PCB, seb puas muaj cov roj xau zaj duab xis nto ntawm PAN txoj haujlwm, uas tuaj yeem thaiv cov nyhuv ntawm daim ntawv thov tin; qhov no tuaj yeem txheeb xyuas tau los ntawm kev sim tin drift.

2. Seb lub PAN txoj hauj lwm ua tau raws li qhov yuav tsum tau ua, uas yog, seb lub ncoo tsim puas tuaj yeem ua kom muaj kev txhawb nqa ntawm cov khoom.

3. Txawm hais tias lub ncoo tsis muaj paug los yog tsis, cov txiaj ntsig tuaj yeem tau los ntawm kev siv ion contamination test; peb lub ntsiab lus saum toj no yog qhov tseem ceeb ntawm kev txiav txim siab los ntawm PCB cov tuam txhab.

Hais txog qhov zoo thiab qhov tsis zoo ntawm ntau txoj hauv kev ntawm kev kho saum npoo, txhua tus muaj nws tus kheej qhov zoo thiab qhov tsis zoo!

Hais txog kev kub plating, nws tso cai rau PCB khaws cia rau lub sijhawm ntev, thiab tsis tshua muaj kev cuam tshuam los ntawm qhov chaw sab nraud ntawm qhov kub thiab av noo (piv rau lwm qhov kev kho deg), thiab feem ntau tuaj yeem khaws cia txog li ib xyoos; tshuaj tsuag tin nto kho yog thib ob, thiab OSP yog thib peb. Kev saib xyuas ntau yuav tsum tau them rau lub sijhawm khaws cia ntawm ob qhov chaw kho mob hauv qhov kub thiab txias.

Feem ntau hais lus, kev kho deg ntawm cov nyiaj immersed yog qhov txawv me ntsis, tus nqi siab dua, qhov chaw cia khoom yog nruj dua, thiab nws yuav tsum tau ntim rau hauv daim ntawv tsis muaj leej faj! Thiab lub sijhawm cia yog li peb lub hlis! Nyob rau hauv cov nqe lus ntawm tin daim ntawv thov cov teebmeem, immersion kub, OSP, HASL, thiab lwm yam yog tiag tiag yuav luag tib yam. Cov neeg tsim khoom feem ntau xav txog kev siv nyiaj zoo!