Qhov txawv ntawm kub plating thiab palladium plating
Muaj ntau cov txheej txheem electroplating thiab cov khoom siv. Kub plating yog peb cov txheej txheem ntau tshaj plaws thiab cov khoom siv, tab sis palladium plating, rhodium plating, thiab ruthenium plating yog zoo dua li kub plating. Qhov no yog palladium plating.
Kub plating siv cov kub tiag tiag, thiab txawm tias tsuas yog ib txheej nyias yog plated, nws twb tso nyiaj rau ze li 10% ntawm tus nqi ntawm tag nrho cov khoom siv hluav taws xob. Kub plating siv kub ua txheej txheej, ib qho yog los pab kev vuam, thiab lwm yam yog tiv thaiv corrosion; txawm cov ntiv tes kub ntawm lub cim xeeb sticks uas tau siv ntau xyoo los tseem ci ntsa iab li niaj hnub no. Qhov zoo: muaj zog conductivity, zoo oxidation kuj, lub neej ntev; tuab txheej, kuj hnav-resistant, feem ntau siv nyob rau hauv vuam thiab ntsaws lub sij hawm. Disadvantages: tus nqi siab, vuam tsis zoo.
Kub / Immersion Kub Nickel Immersion Kub (ENIG), tseem hu ua npib tsib xee kub, immersion nickel kub, hu ua kub, thiab immersion kub. Immersion kub yog txheej tuab ntawm npib tsib xee-kub alloy nrog cov khoom siv hluav taws xob zoo qhwv rau ntawm cov tooj liab los ntawm cov txheej txheem tshuaj thiab tuaj yeem tiv thaiv PCB rau lub sijhawm ntev. Lub deposition thickness ntawm lub puab txheej ntawm npib tsib xee feem ntau yog 120 ~ 240μin (kwv yees 3 ~ 6μm), thiab deposition thickness ntawm txheej txheej kub yog feem ntau 2 ~ 4μinch (0.05 ~ 0.1μm). Immersion kub enables PCB kom ua tau zoo hluav taws xob conductivity thaum lub sij hawm siv mus sij hawm ntev, thiab kuj muaj ib puag ncig kam rau ua dua lwm cov txheej txheem kho deg tsis muaj. Qhov zoo: 1. Qhov saum npoo ntawm PCB kho nrog immersion kub yog heev tiaj tus, thiab coplanarity yog zoo heev, uas yog haum rau qhov sib cuag ntawm lub khawm.
Immersion kub muaj zoo heev solderability, thiab kub yuav sai sai yaj mus rau hauv lub molten solder los ua ib tug hlau compound. Disadvantages: Cov txheej txheem ntws yog complex, thiab kom ua tiav cov txiaj ntsig zoo, nws yog ib qho tsim nyog yuav tsum nruj me ntsis tswj cov txheej txheem tsis. Qhov teeb meem tshaj plaws yog qhov saum npoo ntawm PCB kho nrog immersion kub yog ib qho yooj yim los tsim cov nyhuv dub, uas cuam tshuam rau kev ntseeg tau.
Piv nrog npib tsib xee-palladium-kub, npib tsib xee-palladium-kub (ENEPIG) muaj ib txheej ntxiv ntawm palladium ntawm npib tsib xee thiab kub. Nyob rau hauv cov tshuaj tiv thaiv deposition ntawm kev hloov kub, lub electroless palladium txheej yuav tiv thaiv cov nickel txheej thiab tiv thaiv ntau corrosion los ntawm kev sib hloov kub; palladium yog npaj txhij rau immersion kub thaum tiv thaiv corrosion los ntawm kev hloov cov tshuaj tiv thaiv. Lub deposition thickness ntawm ib tug npib tsib xee feem ntau yog 120 ~ 240μin (kwv yees 3 ~ 6μm), lub thickness ntawm palladium yog 4 ~ 20μin (li 0.1 ~ 0.5μm); Lub deposition thickness ntawm kub yog feem ntau 1 ~ 4μin (0.02 ~ 0.1μm).
Qhov zoo: Kev siv ntau yam, tib lub sijhawm, npib tsib xee palladium kub yog qhov kub thiab txias, uas tuaj yeem tiv thaiv cov teeb meem kev ntseeg tau zoo los ntawm cov teeb meem dub. Qhov tsis zoo: Txawm hais tias npib tsib xee palladium muaj ntau qhov zoo, palladium yog kim thiab tsis muaj peev txheej. Nyob rau tib lub sij hawm, zoo li immersion kub, nws cov txheej txheem tswj yuav tsum nruj.