Cholinga yaikulu ya PCB chithandizo pamwamba kuonetsetsa weldability zabwino kapena performance.Because magetsi mkuwa chibadwidwe mpweya amamuchititsa kukhala mu mawonekedwe a oxides, ndi chodziwikiratu kuti akhalebe mkuwa kwa nthawi yaitali, kotero mkuwa zingamuthandize njira zina zochizira .
1.Hot Air kukhazikika (HAL / HASL)
Hot mpweya kukhazikika, amatchedwanso solder mpweya wotentha kukhazikika (imadziwika monga HAL / HASL), zomwe TACHIMATA pa PCB pamwamba Kutentha osungunula malata solder (kutsogolera) ndi ntchito wothinikizidwa mpweya kwa lonse (nkhonya) lathyathyathya luso, kupanga mawonekedwe ake wosanjikiza zamkuwa makutidwe ndi okosijeni kukana, ndi angapereke weldability wabwino wa ❖ kuyanika layer.The solder ndi mkuwa anapanga mu olowa kupanga compound.The PCB tiyenera kumizidwa mu solder osungunula pa mpweya wotentha conditioning.The mphepo mpeni amatuluka ndi solder madzi pamaso pa solder solidifies.The mphepo mpeni kungathandize kuchepetsa kupinda wa solder padziko mkuwa ndi kuteteza kuwotcherera mlatho.
2.Organic Weldable zitetezeni Mtumiki (OSP)
OSP ndi kusindikizidwa dera bolodi (PCB) mkuwa zojambulazo pamwamba mankhwala a mtundu wa luso akwaniritsa zofunikira za RoHS directive.OSP ndi chidule cha Organic Solderability usawonongeke. Iwo imatchedwanso Organic soldering film, amatchedwanso mtetezi mkuwa, ndipo amatchedwanso Preflux mu English.In ndi Mwachidule, ndi OSP ndi mankhwala kusinthidwa wosanjikiza khungu organic padziko woyera, anabala copper.This filimu ali wotsutsa-makutidwe ndi okosijeni, matenthedwe mantha ndi kukana chinyezi, amene angateteze pamwamba mkuwa dzimbiri (makutidwe ndi okosijeni kapena vulcanization) mu yachibadwa environment.But kutentha wotsatira kuwotcherera, filimuyi kumatenda ndi ayenera achotsedwa mofulumira ndi kamwazi mosavuta, kotero basi muyeretsa mkuwa padziko kuonetsa ali kakafupi nthawi ndi solder osungunula yomweyo kukhala olimba solder mafupa.
3.Full mbale faifi tambala / Gold
mbale faifi tambala / Gold ali yokutidwa padziko PCB kenako yokutidwa ndi wosanjikiza golide. The faifi tambala plating zimagwiritsa kuteteza mayamwidwe wa golide ndi copper.Now pali mitundu iwiri ya golide electroplating faifi tambala: golide zofewa plating (golide, pamwamba golide Zikuwoneka ulibe kuwala) ndi golide molimba plating (pamwamba yosalala ndi zovuta, kuvala-kukana , ali ndi zinthu zina monga cobalt, golide zikuwoneka kuunika) .Soft golide zimagwiritsa ntchito kwa Chip ma CD waya golide; The golide molimba zimagwiritsa ntchito kwa interconnection magetsi m'madera sanali kuwotcherera.
4.Immersion Gold
kumiza golide TACHIMATA ndi wandiweyani, electrically wabwino faifi tambala-golide aloyi padziko mkuwa, zomwe angateteze PCB kwa nthawi yaitali time.In Komanso ali ndi kulolerana padziko mankhwala ena Kuwonjezera technologies.In, likumira golide akhoza kuteteza kuwonongeka kwa mkuwa, amene adzakhala opindulitsa kutsogolera-free msonkhano.
5.Immersion Tin
Popeza solders zonse n'zochokera tini wosanjikiza malata angakhale ndi mtundu uliwonse wa solder.Tin ndondomeko pakati mankhwala lathyathyathya mkuwa malata akhoza kupangidwa, mbali zimapangitsa malata katundu ali ngati mpweya kukhazikika otentha a weldability wabwino ndipo palibe mpweya otentha kusalaza flatness vuto mutu; kumiza malata sangathe kusungidwa kwa nthawi yaitali ndipo ayenera anasonkhana monga mwa dongosolo pogamula lata.
6.Immersion Silver
The ndondomeko siliva ndi pakati ❖ kuyanika organic ndi electroless faifi tambala plating. Dongosololi yosavuta fast.Even atadziŵa kutenthetsa, chinyezi komanso kuipitsidwa, siliva tingakhalebe weldability wabwino koma adzautaya ake luster.The siliva alibe wabwino mphamvu ya mankhwala plating faifi tambala / likumira golide chifukwa palibe faifi tambala pansi wosanjikiza siliva.
7.ENEPIG (Electroless faifi tambala Electroless Palladium kumiza Gold)
Poyerekeza ndi ENEPIG ndi ENIG, pali wosanjikiza zina palladium pakati faifi tambala ndi golide. Palladium chingalepheretse chodabwitsa dzimbiri chifukwa M'MALO anachita, ndi kukonza zonse kuti abatizidwe gold.Gold chimakhudzana yokutidwa ndi palladium, kupereka mawonekedwe abwino.
8.Plating Mwakhama Gold
Pofuna kupititsa avale-kukana chuma cha mankhwala, kuonjezera chiwerengero mayikidwe ndi plating golide zovuta.
