Sida Loo Doorto Dhamaystir Dusha Naqshadaynta PCB-gaaga
---Hagaha Khabiirka ee PCB Dusha sare wuu Dhamaaday
Ⅰ Maxaa iyo Sidee
La dhejiyay:Nov15, 2022
Qaybaha: Blogs
Tags: pcb,pcba,pcb shirka,soo saaraha pcb, pcb-abuurista
Marka ay timaado in dusha sare la dhammeeyo, waxaa jira fursado kala duwan, tusaale HASL, OSP, ENIG, ENEPIG, Hard Gold, ISn, IAg, iwm. Xaaladaha qaarkood, way fududahay in go'aan laga gaaro, sida isku xirka cidhifka ayaa aad u adag. dahab;HASL ama HASL-free ayaa doorbidaya meelaynta qaybaha waaweyn ee SMT.Si kastaba ha ahaatee, way dhib badnaan kartaa in aad dooratid hal dhamaystir oo HDI ah oo leh Ball Grid Arrays (BGAs) haddii aysan jirin tilmaamo kale.Waxaa jira arrimo ay ka mid yihiin miisaaniyaddaada mashruucan, shuruudaha la isku halleyn karo ama caqabadaha waqtiga hawlgalka ayaa u baahan in laga fiirsado xaaladaha qaarkood.Nooc kasta oo ka mid ah dusha sare ee PCB wuxuu leeyahay faa'iidooyin iyo khasaare, waxaa laga yaabaa inay ku wareerto naqshadeeyayaasha PCB inay go'aansadaan midka ku habboon looxyada PCB-gaaga.Waxaan halkaan u joognaa inaan kaa caawino inaad ku xalliso waayo-aragnimadayada sannadaha badan ee soo-saare ahaan.
1. Waa maxay PCB dusha dhammayn
Codsashada dhamaadka dusha sare (daawaynta dusha sare / dahaadhka dusha sare) waa mid ka mid ah tillaabooyinka ugu dambeeya ee samaynta PCB-yada.Dhammaystirka dusha sare wuxuu ka dhigayaa is-dhexgal muhiim ah oo u dhexeeya guddiga PCB ee qaawan iyo qaybaha, u adeegaya laba ujeedo oo muhiim ah, si loo bixiyo dusha sare ee la iibin karo ee PCB-ga iyo in laga ilaaliyo naxaasta soo hartay oo ay ku jiraan raadadka, suufka, godadka iyo diyaaradaha dhulka ee ka yimaada oksaydhka ama wasakheynta. halka maaskarada alxanka ay daboosho inta badan wareegga wareegga.
Dhammaystirka dusha casriga ah waa bilaa rasaas, iyadoo la raacayo xaddidaadda Walxaha halista ah (RoHS) iyo dardaaranka qalabka korontada iyo qashinka (WEEE).Xulashada PCB-ga casriga ah ee dhamaystirka dusha sare waxaa ka mid ah:
- ● LF-HASL (Heerka Alxanka Hawo Kulul ee Leedhka ee Bilaashka ah)
- ● OSP (Ilaalinta Alxanka Organic)
- ENIG (Dahabka Nikelka Immersionka aan Korontada lahayn)
- ENEPIG (Nickel Electroless Palladium Immersion Gold)
- ● Nikkel/dahab koronto ah - Ni/Au (Dahab adag/ jilicsan)
- ● Immersion Silver, IAg
- ●Qasacad cad ama daasad Immersion, ISn
2. Sida aad ugu dooran lahayd dusha sare ee PCB-gaaga
Nooc kasta oo ka mid ah dusha sare ee PCB wuxuu leeyahay faa'iidooyin iyo khasaare, waxaa laga yaabaa inay ku wareerto naqshadeeyayaasha PCB inay go'aansadaan midka ku habboon looxyada PCB-gaaga.Doorashada midda saxda ah ee naqshadayntaada waxay u baahan tahay in la tixgeliyo arrimo badan sida kuwa soo socda.
- ★ Miisaaniyad
- Qalabka wareegga wareegga deegaanka codsiga kama dambaysta ah (tusaale heerkulka, gariirka, RF).
- ★ Shuruudaha loogu talagalay codsade lacag la'aan ah Lead, jawi saaxiibtinimo.
- ★ Shuruudaha lagu kalsoonaan karo ee guddiga PCB.
- ★ Nooca walxaha, cufnaanta ama shuruudaha isu-ururinta tusaale ahaan taam saxaafadda, SMT, xadhigga xadhigga, alxanka godka, iwm.
- ★ Shuruudaha ku saabsan fidsanaanta dusha sare ee suufka SMT ee codsiga BGA.
- ★ Shuruudaha loo baahan yahay nolosha shelf iyo dib-u-shaqayn ee dhamaystirka dusha sare.
- ★ iska caabin naxdin leh/dhicis ah.Tusaale ahaan, ENIG kuma habboona talefanka casriga ah maadaama talefanka smart uu u baahan yahay curaarta qasacadaysan ee naxaasta shoogga sare iyo hoos u dhigista iska caabbinta halkii ay ka ahaan lahaayeen curaarta tin-nickel.
- ★ Tirada iyo wax-soo-saarka.Mugga sare ee PCB-yada, daasadda immersion waxay noqon kartaa xulashooyin la isku halleyn karo oo kharash-ool ah marka loo eego ENIG iyo Immersion Silver iyo arrimaha xasaasiga ah ee la iska ilaalin karo.Taa lidkeeda, qalinka immersion ayaa ka fiican ISn marka loo eego qayb yar.
- U nuglaanshaha daxalka ama wasakhowga.Tusaale ahaan, dhamaystirka qalinka ee immersion wuxuu u nugul yahay daxalka gurguurta.Daasadda OSP iyo Immersion labaduba waxay u nugul yihiin maaraynta burburka.
- ★ Quruxda looxa, iwm.
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