PCB uas tsis tau txais kev kho saum npoo.
Qhov zoo:
Tus nqi qis, du nto, thiab zoo weldability (tsis muaj oxidation).
Qhov tsis zoo:
Yooj yim cuam tshuam los ntawm acid thiab av noo, vim tooj liab yog nquag oxidation thaum raug huab cua; Tsis tuaj yeem siv rau ntawm ob sab boards raws li sab thib ob twb tau oxidized tom qab thawj reflow soldering. Yog tias muaj cov ntsiab lus kuaj, cov tshuaj nplaum yuav tsum tau ntxiv los tiv thaiv oxidation.
OSP process board
Lub luag haujlwm ntawm OSP yog los ua ib txheej txheej ntawm tooj liab thiab huab cua. Yooj yim muab tso, OSP yog txhawm rau cog cov organic nyias zaj duab xis ntawm cov tooj liab dawb huv. Lub luag haujlwm nkaus xwb ntawm cov yeeb yaj kiab nyias nyias no yog los xyuas kom meej tias cov ntawv ci hauv tooj liab tsis oxidized ua ntej vuam. Thaum rhuab thaum lub sij hawm vuam, txheej ntawm zaj duab xis evaporates. Soldering tuaj yeem sib txuas tooj liab thiab cov khoom ua ke.
Qhov zoo:
Muaj tag nrho cov zoo ntawm liab qab tooj liab phaj vuam.
Qhov tsis zoo:
1. OSP yog pob tshab thiab tsis muaj xim, ua rau nws nyuaj rau kev kuaj xyuas thiab paub qhov txawv ntawm OSP los ntawm kev ua tiav.
2. OSP nws tus kheej yog insulated thiab tsis-conductive, uas yuav cuam tshuam rau kev kuaj hluav taws xob. Yog li qhov ntsuas qhov ntsuas yuav tsum tau coated nrog steel mesh thiab solder paste kom tshem tawm cov txheej txheem OSP ua ntej nws tuaj yeem tiv tauj lub koob taw tes rau kev kuaj hluav taws xob.
3. OSP yooj yim cuam tshuam los ntawm acid thiab kub. Thaum siv rau qhov thib ob reflow soldering, nws yuav tsum tau ua kom tiav nyob rau hauv ib lub sij hawm ntawm lub sij hawm, thiab feem ntau cov nyhuv ntawm lub thib ob reflow soldering yuav kuj tsis zoo.
Cua kub leveling
Kub Huab Cua Leveling (HASL) yog txheej txheem txheej txheej molten tin lead solder rau ntawm qhov chaw ntawm PCB thiab flattening (tshuab) nws nrog cua sov compressed cua los tsim ib txheej txheej uas yog ob qho tib si tiv taus tooj liab oxidation thiab muab zoo solderability. Cov cua kub theem ua ib qho tooj liab tin hlau sib txuas ntawm qhov sib txuas ntawm cov solder thiab tooj liab, nrog lub thickness ntawm kwv yees li 1-2 mils.
Qhov zoo:
Tus nqi qis.
Qhov tsis zoo:
1. Cov ntaub qhwv ntsej muag ua tiav los ntawm HASL thev naus laus zis tsis tiaj tus, thiab lawv txoj kev sib koom ua ke tsis tuaj yeem ua tau raws li cov txheej txheem yuav tsum tau ua rau cov ntaub nplaum zoo.
2. Tsis yog ib puag ncig tus phooj ywg, txhuas txhuas yog qhov tsis zoo rau ib puag ncig.
Kub-plated phaj
Kub plating siv cov kub tiag tiag, txawm tias tsuas yog ib txheej nyias nyias yog plated, nws twb tso nyiaj rau ze li ntawm 10% ntawm tus nqi ntawm Circuit Court boards. Kev siv cov kub ua ib txheej yog rau kev yooj yim ntawm vuam thiab tiv thaiv corrosion. Txawm tias cov ntiv tes kub ntawm lub cim xeeb modules uas tau siv ntau xyoo tseem ci ntsa iab zoo li ua ntej.
Qhov zoo:
Muaj zog conductivity thiab zoo antioxidant zog. Cov txheej yog tuab thiab kuj hnav-resistant, thiab feem ntau yog siv rau hauv kev khi, vuam, thiab ntsaws qhov xwm txheej.
Qhov tsis zoo:
Tus nqi siab thiab tsis zoo vuam lub zog.
Hua Jin/Chen Jin
Nickel plating kub, tseem hu ua npib tsib xee plating kub los yog npib tsib xee plating kub, abbreviated li npib tsib xee plating kub los yog npib tsib xee plating kub. Kub plating yog ib txoj kev tshuaj ntawm qhwv ib txheej tuab thiab hluav taws xob zoo ntawm nickel kub alloy rau ntawm qhov chaw tooj liab, uas tuaj yeem tiv thaiv PCBs ntev.
Lub deposition thickness ntawm puab txheej npib tsib xee feem ntau yog {{0}} μ Hauv (kwv yees 3-6 μ m) Lub deposition thickness ntawm txheej kub yog feem ntau 2-4 μ nti (0 .05-0.1 μ m).
Qhov zoo:
1. Qhov saum npoo ntawm PCB kho nrog kub plating yog du heev thiab muaj kev sib raug zoo, ua rau nws tsim nyog siv rau ntawm qhov chaw tseem ceeb.
2. Lub solderability ntawm kub yog zoo heev, thiab kub yuav sai sai sib tov rau hauv melted solder, sib sau Ni / Sn hlau compounds nrog lub solder.
Qhov tsis zoo:
Cov txheej txheem ntws yog complex, thiab kom ua tiav cov txiaj ntsig zoo, kev tswj hwm nruj ntawm cov txheej txheem yuav tsum tau ua. Qhov teeb meem tshaj plaws yog qhov saum npoo ntawm PCB kho nrog kub yog qhov ua rau cov nyhuv dub thaum lub sij hawm ENIG los yog vuam, uas yog ncaj qha manifested li oxidation ntau dhau ntawm Ni. Cov kub ntau dhau tuaj yeem ua rau cov pob qij txha tawg thiab cuam tshuam kev ntseeg tau.
Electroless npib tsib xee palladium plating
Electroless npib tsib xee palladium plating ntxiv ib txheej ntxiv ntawm palladium ntawm npib tsib xee thiab kub. Nyob rau hauv cov tshuaj tiv thaiv deposition ntawm kev hloov pauv kub, lub electroless palladium plating txheej yuav tiv thaiv cov nickel txheej los ntawm kev xeb ntau dhau los ntawm kev hloov kub. Palladium tsis tsuas yog tiv thaiv corrosion tshwm sim los ntawm kev hloov pauv cov tshuaj tiv thaiv, tab sis kuj ua kom txaus npaj rau kub immersion.
Lub deposition thickness ntawm npib tsib xee feem ntau yog {{0}} μ Hauv (kwv yees 3-6 μ m) Lub thickness ntawm palladium yog 4-20 μ Hauv (kwv yees 0). 4}.5 μm). Lub deposition thickness ntawm kub yog feem ntau 1-4 μ Hauv (0.02 ~ 0.1 μ m).
Qhov zoo:
Nws daim ntawv thov ntau yog dav heev, thiab tshuaj lom neeg nickel palladium nto kev kho mob tuaj yeem tiv thaiv cov teeb meem kev ntseeg siab ntawm kev sib txuas los ntawm cov ntaub qhwv dub tsis zoo piv rau cov tshuaj npib tsib xee kub saum npoo kho, uas tuaj yeem hloov cov tshuaj nickel kub.
Qhov tsis zoo:
Txawm hais tias electroless nickel palladium plating muaj ntau qhov zoo, palladium yog kim thiab tsis tshua muaj peev txheej. Nyob rau tib lub sijhawm, zoo li npib tsib xee kub, nws cov txheej txheem tswj cov txheej txheem nruj.
Spray tin Circuit Board
Ib tug silver board yog hu ua spray tin board. Txau ib txheej ntawm cov tin rau ntawm txheej txheej tooj liab kuj tuaj yeem pab hauv vuam, tab sis nws tsis tuaj yeem muab kev sib cuag ntev ntev xws li kub. Yeej, cov rooj sib tham hauv Circuit Court siv rau cov khoom lag luam me me, tsis muaj kev zam, yog cov tin coated vim lawv pheej yig.
Qhov zoo:
Tus nqi qis thiab zoo heev vuam kev ua tau zoo.
Qhov tsis zoo:
Tsis haum rau welding pins nrog nplua qhov khoob thiab cov khoom me me, vim tias qhov chaw tiaj tus ntawm cov tshuaj tsuag tin phaj tsis zoo. Tin hlaws tau yooj yim tsim hauv PCB ua, uas tuaj yeem ua rau luv luv hauv cov khoom sib txawv ntawm tus pin.