Txhua tus neeg koom nrog hauv lub rooj tsav xwm luam tawm ( PCB ) kev lag luam nkag siab tias PCBs muaj tooj liab tiav ntawm lawv qhov chaw.Yog tias lawv tsis muaj kev tiv thaiv ces cov tooj liab yuav oxidize thiab deteriorate, ua rau lub rooj tsav xwm Circuit Court siv tsis tau.Qhov saum npoo tiav ua ib qho tseem ceeb ntawm kev sib txuas ntawm cov khoom thiab PCB.Kev ua tiav muaj ob lub luag haujlwm tseem ceeb, los tiv thaiv cov khoom siv tooj liab thiab muab lub ntsej muag zoo nkauj thaum sib sau ua ke (soldering) cov khoom rau lub rooj tsav xwm luam tawm.

HASL / Lead Free HASL

HASL yog qhov tseem ceeb ntawm qhov chaw tiav siv hauv kev lag luam.Cov txheej txheem muaj cov immersing Circuit Court boards nyob rau hauv lub molten lauj kaub ntawm ib tug tin / txhuas alloy thiab ces tshem tawm cov tshaj solder los ntawm kev siv 'air riam', uas tshuab cua kub nyob rau saum npoo ntawm lub rooj tsavxwm.

Ib qho ntawm cov txiaj ntsig tsis xav tau ntawm cov txheej txheem HASL yog tias nws yuav nthuav tawm PCB rau qhov kub txog li 265 ° C uas yuav txheeb xyuas cov teeb meem uas muaj peev xwm delamination zoo ua ntej cov khoom kim heev txuas nrog lub rooj tsavxwm.

HASL tiav Ob Chav Sided Printed Circuit Board

Qhov zoo:

• Tus nqi qis
• Muaj dav
• Rov ua haujlwm dua
• Lub neej txee zoo heev

Qhov tsis zoo:

• Tsis sib xws
• Tsis zoo rau lub ntsej muag zoo
• Muaj Lead (HASL)
• Thermal Shock
• Solder Bridging
• Plugged lossis txo PTH's (Plated Los Ntawm Qhov)

Immersion Tin

Raws li IPC, Lub Koom Haum Txuas Hluav Taws Xob Kev Lag Luam, Immersion Tin (ISn) yog cov khoom siv hlau ua tiav los ntawm cov tshuaj hloov pauv tshuaj uas siv ncaj qha los ntawm cov hlau hauv Circuit Board, uas yog, tooj liab.Lub ISn tiv thaiv lub hauv paus tooj liab los ntawm oxidation tshaj nws lub neej txee.

Copper thiab tin txawm li cas los xij muaj kev sib raug zoo rau ib leeg.Qhov diffusion ntawm ib qho hlau mus rau lwm qhov yuav tshwm sim inevitably, cuam tshuam ncaj qha rau lub txee lub neej ntawm qhov tso nyiaj thiab kev ua haujlwm ntawm kev ua tiav.Qhov tsis zoo ntawm tin whiskers kev loj hlob tau piav qhia zoo hauv kev lag luam cov ntaub ntawv thiab cov ncauj lus ntawm ntau cov ntawv luam tawm.

Qhov zoo:

• Lub Plawv Nto
• Tsis muaj Pb
• Rov ua haujlwm dua
• Kev xaiv sab saum toj rau Xovxwm Fit Pin Insertion

Qhov tsis zoo:

• Ib qho yooj yim ua rau kev puas tsuaj
• Cov txheej txheem siv cov Carcinogen (Thiourea)
• Exposed Tin ntawm Lub Rooj Sib Tham Kawg tuaj yeem Corrode
• Tin Whiskers
• Tsis zoo rau ntau cov txheej txheem rov qab / sib dhos
• Yooj yim ntsuas Thickness

Immersion Nyiaj

Immersion silver yog cov tshuaj uas tsis yog-electrolytic tiav siv los ntawm immersing lub tooj liab PCB rau hauv lub tank ntawm nyiaj ions.Nws yog ib qho kev xaiv zoo rau cov rooj sib tham nrog EMI shielding thiab tseem siv tau rau kev sib cuag dome thiab xaim sib txuas.Qhov nruab nrab thickness ntawm cov nyiaj yog 5-18 microinches.

Nrog rau niaj hnub kev txhawj xeeb ib puag ncig xws li RoHS thiab WEE, immersion nyiaj yog ib puag ncig zoo dua li HASL thiab ENIG.Nws tseem nrov vim nws tus nqi qis dua ENIG.

Qhov zoo:

• Siv ntau tus sib npaug tshaj HASL
• Ib puag ncig zoo dua ENIG thiab HASL
• Txee lub neej sib npaug rau HASL
• Tus nqi zoo dua ENIG

Qhov tsis zoo:

• Yuav tsum tau soldered nyob rau hauv hnub lub PCB raug tshem tawm ntawm cia
• Yuav tarnished yooj yim nrog kev tuav tsis raug
• Tsawg zog dua ENIGdue tsis muaj txheej ntawm nickel hauv qab

OSP / Entek

OSP (Organic Solderability Preservative) los yog tiv thaiv tarnish khaws cov tooj liab saum npoo los ntawm oxidation los ntawm kev siv cov txheej txheem tiv thaiv zoo heev ntawm cov khoom siv tooj liab feem ntau siv cov txheej txheem conveyorized.

Nws siv cov dej-raws li cov organic compound uas xaiv cov ntawv cog lus rau tooj liab thiab muab cov txheej txheem organometallic uas tiv thaiv cov tooj liab ua ntej soldering.Nws kuj tseem ntsuab ib puag ncig zoo rau kev sib piv nrog rau lwm cov kev ua tiav tsis muaj cov hlau lead, uas raug kev txom nyem los ntawm kev muaj tshuaj lom ntau dua los yog siv zog ntau dua.

Qhov zoo:

• Lub Plawv Nto
• Tsis muaj Pb
• Txheej txheem yooj yim
• Rov ua haujlwm dua
• Nqi siv tau

Qhov tsis zoo:

• Tsis Muaj Txoj Kev Ntsuas Thickness
• Tsis zoo rau PTH (Plated Los Ntawm Qhov)
• Lub neej luv luv
• Yuav ua rau ICT teeb meem
• Exposed Cu nyob rau hauv zaum kawg Assembly
• Tuav Sensitive

Electroless Nickel Immersion Kub (ENIG)

ENIG yog ob txheej hlau txheej txheej ntawm 2-8 μin Au tshaj 120-240 μin Ni.Nickel yog qhov thaiv ntawm tooj liab thiab yog qhov chaw uas cov khoom siv tau raug soldered rau.Cov kub tiv thaiv cov npib tsib xee thaum lub sijhawm khaws cia thiab tseem muab qhov kev tiv thaiv qis uas yuav tsum tau ua rau cov nyiaj kub nyias.ENIG yog tam sim no arguably qhov feem ntau siv tiav hauv PCB kev lag luam vim kev loj hlob thiab kev siv ntawm RoHs kev cai.

Printed Circuit Board nrog Chem Kub Nto tiav

Qhov zoo:

• Lub Plawv Nto
• Tsis muaj Pb
• Zoo rau PTH (Plated Los Ntawm Qhov)
• Lub neej ntev txee

Qhov tsis zoo:

• kim
• Tsis tuaj yeem rov ua haujlwm
• Dub Pad / Dub Nickel
• Kev puas tsuaj los ntawm ET
• Teeb liab poob (RF)
• Txheej txheem nyuaj

Electroless Nickel Electroless Palladium Immersion Kub (ENEPIG)

ENEPIG, tus txheeb ze tshiab rau lub rooj sib tham hauv lub ntiaj teb ntawm kev ua tiav, thawj zaug tuaj ntawm kev ua lag luam thaum xyoo 90s lig.Qhov no peb-txheej hlau txheej txheej ntawm npib tsib xee, palladium, thiab kub muab kev xaiv zoo li tsis muaj lwm tus: nws yog bondable.ENEPIG thawj qhov tawg ntawm cov ntawv luam tawm ntawm lub rooj tsavxwm saum npoo kev kho mob fizzled nrog kev tsim khoom vim nws cov nqi siab heev txheej ntawm palladium thiab kev thov siv tsawg.

Qhov kev xav tau rau ib qho kev tsim khoom sib cais tsis tau txais rau tib yam laj thawj.Tsis ntev los no, ENEPIG tau rov qab los ua qhov muaj peev xwm ua tau raws li kev ntseeg siab, ntim khoom xav tau, thiab RoHS cov qauv yog ib qho ntxiv nrog qhov ua tiav no.Nws yog qhov zoo tshaj plaws rau kev siv ntau zaus uas qhov sib txawv yog txwv.

Thaum muab piv rau lwm qhov saum toj kawg nkaus plaub tiav, ENIG, Lead Free-HASL, immersion silver thiab OSP, ENEPIG outperforms tag nrho cov tom qab-assembly corrosion theem.

Qhov zoo:

• Plab Ntog heev
• Tsis muaj cov ntsiab lus Lead
• Multi-Cycle Assembly
• Zoo heev Solder Joints
• Hlau Bondable
• Tsis muaj Corrosion Risk
• 12 Lub Hlis lossis Lub Neej Txuag Ntau
• Tsis muaj Dub Pad Risk

Qhov tsis zoo:

• Tseem kim kim
• Rov ua haujlwm dua nrog qee qhov txwv
• Kev txwv kev ua haujlwm

Kub - Hard Kub

Hard Electrolytic Kub muaj txheej kub plated hla lub tsho tiv thaiv ntawm npib tsib xee.Cov kub kub yog qhov ruaj khov heev, thiab feem ntau yog siv rau qhov hnyav hnyav xws li ntug txuas ntiv tes thiab cov keyboards.

Tsis zoo li ENIG, nws cov tuab tuaj yeem sib txawv los ntawm kev tswj lub sijhawm ntawm lub voj voog plating, txawm hais tias qhov tsawg kawg nkaus qhov tseem ceeb rau cov ntiv tes yog 30 μin kub tshaj 100 μin npib tsib xee rau Class 1 thiab Class 2, 50 μin kub tshaj 100 μin nickel rau Chav Kawm 3.

Cov kub kub tsis yog feem ntau siv rau thaj chaw solderable, vim nws cov nqi siab thiab nws cov khoom tsis zoo.Qhov siab tshaj plaws thickness uas IPC suav tias yog solderable yog 17.8 μin, yog li yog tias hom kub no yuav tsum tau siv rau ntawm qhov chaw yuav tsum tau soldered, qhov pom zoo nominal thickness yuav tsum yog li 5-10 μin.

Qhov zoo:

• Hard, Durable Nto
• Tsis muaj Pb
• Lub neej ntev txee

Qhov tsis zoo:

• Nqis heev
• Extra Processing / Labor Intensive
• Kev siv Resist / Daim kab xev
• Plating / Bus Bars yuav tsum tau
• Demarcation
• Nyuaj nrog Lwm Qhov Nto tiav
• Etching Undercut tuaj yeem ua rau Slivering / Flaking
• Tsis Solderable Saum 17 μin
• Kev Ua tiav Tsis Zoo Tag Nrho Cov Kab Ntsig Sib Nqus, Tsuas yog hauv Cov Ntiv Tes

Nrhiav rau qhov tshwj xeeb nto tiav rau koj lub Circuit Court Board?