Ujeeddada asaasiga ah ee PCB daaweyn dusha waa in la hubiyo weldability wanaagsan ama performance.Because korontada copper dabiiciga ah ee hawada waxay u egtahay in ay qaab oxides, waa lagama yaabo in ay ku sii copper muddo dheer, sidaasi darteed copper waxaa loo baahan yahay daaweyn kale .
1.Hot Air Nigeria (Hal / HASL)
Nigeria hawada kulul, sidoo kale loo yaqaan hawada kulul Nigeria Alxan (guud ahaan loo yaqaan Hal / HASL), kaas oo la dahaarka leh oo ku saabsan PCB dusha kulaylinta Alxan iyo waxa daasadda la shubay (lead) iyo isticmaalaan hawada tilmaantay Tifaftirayaasha BBC u dhan (dharbaaxo) technology guri, ka dhigi qaab lakabka ah ee iska caabin ah lagu qayilo copper, oo ku siin kara weldability wanaagsan oo Alxan layer.The daahan iyo copper loo sameeyay in si wadajir ah si ay u sameeyaan PCB compound.The ah waa in la Hawiyaha Alxan shubay inta lagu guda jiro mindi dabayl conditioning.The hawada kulul raaci ku Alxan dareeraha ka hor mindi dabayl Alxan ku solidifies.The yareeyo kartaa isqaloocinta ee Alxan on dusha copper iyo hortago alxanka buundada.
2.Organic Weldable Protective Agent (OSP)
OSP ku daabacan circuit guddiga (PCB) bireed copper daaweyn dusha of nooc ka mid ah farsamada si ay u buuxiyaan shuruudaha RoHS directive.OSP waa soo gaabiyay oo ah ilaaliye Organic Solderability. Waxa kale oo loo yaqaan, kabida filimka Organic, sidoo kale loo yaqaan gargaare copper ah, oo sidoo kale loo yaqaan Preflux in English.In kooban, OSP waa lakabka ah kiimikada modified ee maqaarka organic dushiisa of nadiif ah, waxay dhashay copper.This film leeyahay anti-qayilo, si lama filaan ah kaamerada iyo iska caabin qoyaan, taas oo ka miridhku (qayilo ama vulcanization) ilaalin karaa dusha copper ee caadiga ah environment.But kulaylka alxanka ku xiga, filimka difaaca iyo waa in si dhakhso ah looga saari daadanayo si fudud, sidaas oo kaliya karo dhigi dusha copper nadiif ah oo show waa in muddo aad u yar waqtiga la Alxan shubay isla markiiba noqday a-goysyada Alxan adag.
3.Full Plate Nikkel / Gold
Plate Nikkel / Gold waxaa plated on dusha sare ee PCB ka dibna dahaadhay lakabka ah oo dahab ah. Dahaadhay nickel The inta badan waa in laga hortago sida- ah oo dahab ah oo copper.Now waxaa jira laba nooc oo dahab ah nickel electroplating: dahaadhay dahab jilicsan (dahab, dusha dahab muuqda ma dhalaalaya) iyo dahaadhay dahab adag (dusha sare waa siman oo adag, xirtaan-hor joogsataan , waxaa ku jira xubno kale sida Cobalt, dahab u muuqataa iftiin badan) oo dahab .Soft waxaa inta badan loo isticmaalaa silig dahab baakadaha chip, dahab The adag waxaa inta badan loo isticmaalaa isku korontada goobaha aan alxanka.
4.Immersion Gold
Immersion dahabka loo dahaarka leh, waxaaga qaro koronto wanaagsan nickel-dahab dushiisa copper ah, kuwaas oo ilaalin kara PCB for a Intaa waxaa dheer time.In dheer, waxa ay leedahay dulqaadka ee kale ee intaa dheer technologies.In daaweyn dusha, degaan dahab ah Waxa kale oo ka hortagi kara kala diridooda ku of copper, kaas oo noqon doona faa'iido u keeni-free shirka.
5.Immersion Tin
Tan oo dhan solders ku salaysan yihiin iyo waxa daasadda, lakabka iyo waxa daasadda ah dhigma kartaa nooc kasta oo ah habka solder.Tin dhexeeya xeryahooda waxa daasadda copper guri la abuuri karaa, feature taas oo ka dhigaysa daasadda culus ayaa sida Nigeria hawada kulul ee weldability wanaagsan iyo ma hawada kulul dheellitir flatness dhibaatada madax xanuun, iyo waxa daasadda bilowga aan la kaydin karaa muddo dheer iyo waa in la soo ururay si waafaqsan of degaya iyo waxa daasadda.
6.Immersion Silver
habka lacag waa inta u dhaxaysa daahan organic iyo dahaadhay nickel electroless. Geedi socodka waa mid fudud oo fast.Even markii loo feydo kulka, qoyaan iyo wasakhda, lacag joogteyn karto weldability wanaagsan laakiin waa lumin doonaa, ay luster.The lacag ah ma lahan awood ay wanaagsan jirka ah ee nickel dahaadhay kiimikada / taago dahab ah, maxaa yeelay, waxaa jira nickel no hoos lakabka lacagtii.
7.ENEPIG (Palladium Electroless Nikkel Electroless Immersion Gold)
Marka la barbar dhigo ENEPIG iyo ENIG, waxaa jira lakabka dheeraad ah palladium dhexeeya nickel iyo dahab. Palladium hortagi karaa ifafaale daxalka sababa dareen-celin la bedelay ka, oo waxaan ka dhigi diyaarinta buuxda gold.Gold bilowga ah ula daboolay palladium, bixinta interface wanaagsan.
8.Plating Hard Gold
Si loo wanaajiyo hantida Duugga-hor joogsataan ee alaabta ah, la kordhiyo tirada galinta iyo dahaadhay dahab adag.
