PCB Qhov Chaw Tiav
| Qhov Chaw Tiav | Tus nqi ib txwm muaj | Tus neeg muag khoom |
| Chaw Ua Haujlwm Tua Hluav Taws Dawb | 0.3~0.55µm, 0.25~0.35µm | Enthone |
| Shikoku Tshuaj | ||
| POM ZOO | Los yog: 0.03 ~ 0.12um, Ni: 2.5 ~ 5um | ATO tech/Chuang Zhi |
| Xaiv ENIG | Los yog: 0.03 ~ 0.12um, Ni: 2.5 ~ 5um | ATO tech/Chuang Zhi |
| ENEPIC | Au: 0.05~0.125µm, Pd: 0.05~0.3µm | Chuang Zhi |
| Hauv: 3 ~ 10um | ||
| Kub tawv | Au: 0.127 ~ 1.5um, Ni : min 2.5um | Tus Them Nyiaj/EEJA |
| Kub mos | Au: 0.127 ~ 0.5um, Ni : min 2.5um | NTSES |
| Tin rau kev nqus dej | Yam tsawg kawg nkaus: 1um | Enthone / ATO tech |
| Nyiaj Kub Rau Kev Sib Tw | 0.127 ~ 0.45um | Macdermid |
| HASL tsis muaj hmoov txhuas | 1 ~ 25um | Nihon Superior |
Vim tias tooj liab muaj nyob rau hauv daim ntawv ntawm oxides hauv huab cua, nws cuam tshuam loj heev rau kev sib txuas thiab kev ua haujlwm hluav taws xob ntawm PCBs. Yog li ntawd, nws yog qhov tsim nyog los ua kom tiav qhov chaw ntawm PCBs. Yog tias qhov chaw ntawm PCBs tsis tiav, nws yooj yim ua rau muaj teeb meem virtual soldering, thiab hauv cov xwm txheej hnyav, cov ntaub qhwv thiab cov khoom tsis tuaj yeem sib txuas. PCB qhov chaw tiav yog hais txog cov txheej txheem ntawm kev tsim cov txheej txheem saum npoo ntawm PCB. Lub hom phiaj ntawm PCB tiav yog kom ntseeg tau tias PCB muaj kev sib txuas zoo lossis kev ua haujlwm hluav taws xob. Muaj ntau hom kev tiav qhov chaw rau PCBs.
Kev Sib Txuas Lus Kub Cua Kub (HASL)
Nws yog ib qho txheej txheem ntawm kev siv cov hlau lead tin molten rau ntawm qhov chaw ntawm PCB, ua kom nws tiaj (tshuab) nrog cua sov compressed thiab tsim ib txheej txheej uas tiv taus tooj liab oxidation thiab muab kev solderability zoo. Thaum lub sijhawm no, nws yog ib qho tsim nyog los tswj cov kev ntsuas tseem ceeb hauv qab no: kub soldering, kub ntawm riam cua kub, siab ntawm riam cua kub, lub sijhawm immersion, qhov ceev ntawm kev nqa, thiab lwm yam.
Qhov zoo ntawm HASL
1. Lub sijhawm cia ntev dua.
2. Cov ntaub mos zoo thiab npog tooj liab.
3. Siv dav dav hom tsis muaj txhuas (RoHS ua raws li).
4. Kev siv tshuab laus, tus nqi qis.
5. Zoo heev rau kev kuaj xyuas thiab kev kuaj hluav taws xob.
Qhov tsis muaj zog ntawm HASL
1. Tsis haum rau kev sib txuas hlau.
2. Vim yog lub cev nqaij daim tawv ntawm cov hlau nplaum uas yaj, qhov tiaj tiaj tsis zoo.
3. Tsis siv tau rau cov qhov hloov pauv capacitive.
4. Rau cov vaj huam sib luag nyias nyias, HASL tej zaum yuav tsis haum. Qhov kub siab ntawm lub dab dej yuav ua rau lub rooj tsavxwm sib ntswg.
2. Pawg Neeg Tua Hluav Taws Dawb
OSP yog lub npe luv rau Organic Solderability Preservative, tseem hu ua per solder. Hauv ntej, OSP yog tias yuav tsum tau txau rau ntawm qhov chaw ntawm cov ntaub so tooj liab kom muab cov zaj duab xis tiv thaiv ua los ntawm cov tshuaj organic. Cov zaj duab xis no yuav tsum muaj cov khoom xws li kev tiv thaiv oxidation, kev tiv thaiv thermal shock thiab kev tiv thaiv noo noo los tiv thaiv qhov chaw tooj liab los ntawm xeb (oxidation lossis vulcanization, thiab lwm yam) hauv ib puag ncig ib txwm muaj. Txawm li cas los xij, hauv kev sib txuas kub siab tom qab, cov zaj duab xis tiv thaiv no yuav tsum tau yooj yim tshem tawm los ntawm cov kua dej sai sai, yog li qhov chaw tooj liab huv si tuaj yeem sib txuas nrog cov yaj yaj kom tsim cov khoom sib txuas muaj zog hauv lub sijhawm luv luv. Hauv lwm lo lus, lub luag haujlwm ntawm OSP yog ua raws li qhov thaiv ntawm tooj liab thiab huab cua.
Qhov zoo ntawm OSP
1. Yooj yim thiab pheej yig; Qhov tiav ntawm qhov chaw tsuas yog tsuag txheej xwb.
2. Qhov saum npoo ntawm lub solder pad yog du heev, nrog rau qhov tiaj tiaj piv rau ENIG.
3. Tsis muaj txhuas (ua raws li RoHS cov qauv) thiab tus phooj ywg ib puag ncig.
4. Rov ua haujlwm tau.
Qhov tsis muaj zog ntawm OSP
1. Tsis ntub dej.
2. Qhov xwm txheej ntawm zaj duab xis no meej thiab nyias txhais tau tias nws nyuaj rau ntsuas qhov zoo los ntawm kev tshuaj xyuas pom thiab ua kev sim online.
3. Lub neej ua haujlwm luv luv, qhov yuav tsum tau khaws cia thiab tuav ntau.
4. Kev tiv thaiv tsis zoo rau cov plated los ntawm qhov.
Nyiaj Kub Rau Kev Sib Tw
Nyiaj muaj cov tshuaj lom neeg ruaj khov. Cov PCB uas ua los ntawm cov thev naus laus zis immersion nyiaj tseem tuaj yeem muab kev ua haujlwm hluav taws xob zoo txawm tias raug rau qhov kub thiab txias, av noo thiab muaj kuab paug, nrog rau kev tswj hwm kev sib txuas zoo txawm tias nws yuav poob nws cov luster. Immersion Silver yog qhov kev hloov pauv uas ib txheej ntawm cov nyiaj ntshiab tau tso ncaj qha rau ntawm tooj liab. Qee zaum, immersion nyiaj tau sib xyaw nrog OSP coatings kom tiv thaiv nyiaj los ntawm kev cuam tshuam nrog sulfides hauv ib puag ncig.
Qhov Zoo ntawm Immersion Silver
1. Kev siv tau zoo heev.
2. Qhov chaw tiaj tiaj zoo.
3. Tus nqi qis thiab tsis muaj txhuas (ua raws li cov qauv RoHS).
4. Siv tau rau Al hlau txuas.
Qhov Tsis Muaj Zog ntawm Immersion Silver
1. Cov kev xav tau cia khoom siab thiab yooj yim ua rau muaj kuab paug.
2. Lub sijhawm sib dhos luv luv tom qab rho tawm ntawm lub ntim.
3. Nyuaj rau kev kuaj hluav taws xob.
Tin rau kev nqus dej
Vim tias txhua yam khoom siv solder yog tin based, cov txheej tin tuaj yeem phim txhua hom khoom siv solder. Tom qab ntxiv cov organic additives rau hauv cov kua tin immersion, cov qauv txheej tin nthuav tawm cov qauv granular, kov yeej cov teeb meem tshwm sim los ntawm tin whiskers thiab tin migration, thaum tseem muaj kev ruaj khov thermal zoo thiab solderability.
Cov txheej txheem Immersion Tin tuaj yeem tsim cov khoom sib xyaw ua ke ntawm cov tooj liab tiaj tiaj kom ua rau cov tin immersion muaj qhov zoo solderability yam tsis muaj teeb meem flatness lossis intermetallic compound diffusion.
Qhov Zoo ntawm Immersion Tin
1. Siv tau rau cov kab ntau lawm kab rov tav.
2. Siv tau rau kev ua cov hlau zoo thiab kev siv hlau tsis muaj txhuas, tshwj xeeb tshaj yog siv rau cov txheej txheem crimping.
3. Qhov tiaj tiaj zoo heev, siv tau rau SMT.
Qhov tsis muaj zog ntawm Immersion Tin
1. Qhov yuav tsum tau cia khoom ntau, tej zaum yuav ua rau cov ntiv tes hloov xim.
2. Cov hlau nplaum uas lo rau ntawm cov hlau nplaum yuav ua rau luv luv thiab muaj teeb meem rau kev sib txuas, ua rau lub sijhawm khaws cia luv dua.
3. Nyuaj rau kev kuaj hluav taws xob.
4. Cov txheej txheem no muaj cov tshuaj carcinogens.
POM ZOO
ENIG (Electroless Nickel Immersion Gold) yog ib txheej txheej uas siv dav dav uas muaj 2 txheej hlau, qhov twg nickel raug tso ncaj qha rau ntawm tooj liab thiab tom qab ntawd cov kub atoms raug plated rau ntawm tooj liab los ntawm kev hloov pauv. Lub thickness ntawm nickel txheej sab hauv feem ntau yog 3-6um, thiab lub thickness ntawm cov kub txheej sab nraud feem ntau yog 0.05-0.1um. Nickel tsim ib txheej thaiv ntawm cov solder thiab tooj liab. Lub luag haujlwm ntawm kub yog los tiv thaiv nickel oxidation thaum lub sijhawm khaws cia, yog li ua kom lub txee ntev dua, tab sis cov txheej txheem kub immersion kuj tseem tuaj yeem tsim cov nplaim zoo heev.
Cov txheej txheem ua tiav ntawm ENIG yog: ntxuav -> etching -> catalyst -> tshuaj lom neeg nickel plating -> kub deposition -> ntxuav cov seem
Cov txiaj ntsig ntawm ENIG
1. Haum rau kev siv cov hlau tsis muaj txhuas (RoHS ua raws li txoj cai).
2. Qhov nto du zoo heev.
3. Lub neej ntev thiab qhov chaw ruaj khov.
4. Haum rau Al hlau txuas.
Qhov tsis muaj zog ntawm ENIG
1. Kim vim siv kub.
2. Cov txheej txheem nyuaj, nyuaj rau tswj.
3. Yooj yim los tsim cov xwm txheej dub ncoo.
Electrolytic Nickel/Kub (kub tawv/kub mos)
Kub electrolytic nickel muab faib ua "kub tawv" thiab "kub mos". Kub tawv muaj qhov tsis huv thiab feem ntau siv rau hauv cov ntiv tes kub (PCB ntug connectors), PCB contacts lossis lwm qhov chaw uas tsis yooj yim hnav. Qhov tuab ntawm kub yuav txawv raws li qhov yuav tsum tau ua. Kub mos muaj qhov huv dua thiab feem ntau siv rau hauv kev sib txuas hlau.
Qhov Zoo ntawm Electrolytic Nickel / Kub
1. Lub neej txee ntev dua.
2. Haum rau kev sib txuas lus thiab kev sib txuas hlau.
3. Kub tawv yog tsim rau kev sim hluav taws xob.
4. Tsis muaj txhuas (RoHS ua raws li)
Qhov Tsis Muaj Zog ntawm Electrolytic Nickel / Kub
1. Qhov chaw tiav kim tshaj plaws.
2. Cov ntiv tes kub electroplating xav tau cov xov hlau conductive ntxiv.
3. Kub tsis yooj yim vuam. Vim yog kub tuab, cov txheej tuab dua nyuaj vuam dua.
ENEPIC
Electroless Nickel Electroless Palladium Immersion Gold lossis ENEPIG feem ntau siv rau kev ua kom tiav ntawm PCB. Piv rau ENIG, ENEPIG ntxiv ib txheej ntxiv ntawm palladium ntawm nickel thiab kub kom tiv thaiv txheej nickel ntawm kev xeb thiab tiv thaiv kev tsim cov ntawv dub uas yooj yim tsim hauv ENIG qhov chaw ua tiav. Lub thickness ntawm nickel yog li 3-6um, lub thickness ntawm palladium yog li 0.1-0.5um thiab lub thickness ntawm kub yog 0.02-0.1um. Txawm hais tias lub thickness ntawm kub me dua ENIG, ENEPIG kim dua. Txawm li cas los xij, qhov tsis ntev los no ntawm cov nqi palladium tau ua rau ENEPIG tus nqi pheej yig dua.
Qhov zoo ntawm ENEPIG
1. Muaj tag nrho cov txiaj ntsig ntawm ENIG, tsis muaj qhov tshwm sim dub pad.
2. Zoo dua rau kev sib txuas hlau dua li ENIG.
3. Tsis muaj kev pheej hmoo ntawm kev xeb.
4. Lub sijhawm khaws cia ntev, tsis muaj txhuas (RoHS ua raws li)
Qhov tsis muaj zog ntawm ENEPIG
1. Cov txheej txheem nyuaj, nyuaj rau tswj.
2. Tus nqi siab.
3. Nws yog ib txoj kev tshiab thiab tseem tsis tau paub tab.