Ko te kaupapa tino taketake o te maimoatanga mata PCB ko te whakarite kia pai te weldability me nga taonga hiko.No te mea ko te parahi i roto i te taiao e kaha ana ki te noho i roto i te ahua o te waikura i te rangi, kaore pea e mau tonu hei parahi taketake mo te wa roa, na reira me mahi ki te parahi.
He maha nga tukanga maimoatanga mata PCB.Ko nga mea noa he papatahi, he maataki whakamarumaru kaiao (OSP), he koura nickel-whakakikorua tonu, Shen Jin, Shenxi, Shenyin, nickel matū, koura, me te whakakikorua i te koura pakeke.Tohutohu.
1. He papatahi te hau wera (te rehu tine)
Ko te tukanga whānui o te tukanga whakaōrite rangi wera ko: te horo moroiti → whakawera → paninga fehokotaki'anga → rehu tine → horoi.
He papatahi te hau wera, e mohiotia ana ko te hau wera he paiherea (e mohiotia ana ko te rehu tine), koinei te tikanga o te whakakikorua i te tine rewa (arahi) ka paiherea ki te mata PCB me te whakamahi whakamahana ki te kopiri i te whakatikatika o te hau (pupuhi) ki te hanga. he paparanga o te waiora anti-konukura.Ka taea hoki te whakarato i nga paparanga whakakikorua pai.Ko te weld katoa me te parahi o te hau wera ka hanga he konupora -tin whakarewa pūhui interductive i te huinga.PCB te nuinga totohu i roto i te rewa wai paiherea;ka pupuhi te maripi hau i te wai paiherea te wai papatahi ka paiherea i mua i te wea;
Ko te taumata o te hau wera ka wehea kia rua nga momo: poutū me te whakapae.E whakaponohia ana he pai ake te momo whakapae.Ko te nuinga he ahua rite te paparanga whakatikatika hau wera whakapae, ka taea te whakatutuki i te hanga aunoa.
Painga: te wa rokiroki roa;i muri i te oti o te PCB, kua tino makuku te mata o te parahi (kua kapi katoa te tine i mua i te whakapiri);he pai mo te whakapiri mata;tukanga pakeke, utu iti, e tika ana mo te tirohanga tirohanga me te whakamatautau hiko
Nga ngoikoretanga: Kaore e pai mo te here raina;na te raruraru o te papatahi o te mata, he herenga ano mo te SMT;e kore e pai mo te hoahoa whakawhiti whakapā.A, no te rehu tine, ka memeha te parahi, me te papa he pāmahana teitei.Ina koa nga pereti matotoru, angiangi ranei, he iti te rehu tine, a, he kino te mahi whakaputa.
2, parepare weldability waro (OSP)
Ko te tikanga whanui ko: te whakaheke-> moroiti-waitara -> te tiki -> te horoi wai parakore -> te paninga pararopi -> te horoi, a he ngawari te whakahaere o te tukanga ki te whakaatu i te tukanga maimoatanga.
Ko te OSP he tukanga mo te maimoatanga mata o te papa porowhita (PCB) i runga i nga whakaritenga a te RoHS.He poto te OSP mo te Organic Solderability Preservatives, e mohiotia ana ano ko te organic solderability preservatives, e mohiotia ana ko Preflux i te reo Ingarihi.Ko te korero noa, ko te OSP he kiriata kiri pararopi kua tipu matū ki runga i te mata parahi korekore.Ko tenei kiriata he anti-oxidation, wiri wera, makuku ātete, ki te tiaki i te mata parahi i roto i te taiao noa kore waikura (hāoratanga, vulcanization ranei, etc.);Heoi, i roto i te pāmahana teitei fehokotaki'anga muri, tenei kiriata whakamarumaru kia ngāwari nekehia atu e te rere, kia taea te te mata parahi ma kitea tonu ngā ki te whakarewa whakarewa i roto i te wa poto rawa ki te riro i te hononga konutō totoka.
Painga: He ngawari te tukanga, he tino papaa te mata, he pai mo te raima kore-a-ringa me te SMT.He ngawari ki te mahi ano, he watea te mahi whakaputa, he pai mo te mahi raina whakapae.He pai te papa mo te tukatuka maha (hei tauira OSP+ENIG).He iti te utu, he pai ki te taiao.
Raruraru: te herenga o te maha o te reflow fehokotaki'anga (maha fehokotaki'anga matotoru, ka whakangaromia te kiriata, fele 2 wa kahore raruraru).Kaore i te pai mo te hangarau crimp, here waea.Kaore i te watea te kitenga tirohanga me te hiko hiko.Ko te tiaki hau N2 e hiahiatia ana mo SMT.Kaore i te pai te mahi a SMT.Nga whakaritenga rokiroki teitei.
3, te paraharaha katoa whakakikoruatia nika koura
Plate nickel whakakikorua ko te PCB conductor mata tuatahi whakakikoruatia ki te apa o te nickel me ka whakakikoruatia ki te kahu o te koura, nickel whakakikorua te nuinga ki te ārai i te tūringiringi i waenganui i te koura me te parahi.E rua nga momo o te koura nickel electroplated: whakakikorua koura ngohengohe (koura parakore, e kore te mata koura e titiro kanapa) me te whakakikorua koura pakeke (mata maeneene me te mārō, mau-ātete, kei roto etahi atu huānga pērā i te cobalt, mata koura titiro kanapa).Ko te nuinga o te koura ngawari e whakamahia ana mo te maramara taapi waea koura;Ko te koura maro te nuinga e whakamahia ana i roto i nga hononga hiko kore-paiherea.
Painga: Roa te wa rokiroki>12 marama.E tika ana mo te hoahoa whakawhiti whakapā me te here waea koura.He pai mo te whakamatautau hiko
He ngoikoretanga: He utu nui ake, he koura matotoru.Ko nga maihao kua whakakikoruatia me whai taapiri waea hoahoa.Na te mea kaore i te rite te matotoru o te koura, ina pa ana ki te whakapiri, tera pea ka pakaru te hononga o te hononga na te koura matotoru rawa, ka pa ki te kaha.Te whakakikorua o te mata raruraru riterite.Ko te koura nickel kua whakakikoruatia kaore e kapi i te taha o te waea.Kaore e pai mo te hononga waea konumohe.
4. Totohu koura
Ko te tikanga: te horoi pikara –> te waikura moroiti –> te whakamaaramatanga –> te whakahohe –> te whakakikorua nickel electroless –> te riihi koura matū;E 6 nga taika matū kei roto i te mahi, tata ki te 100 nga momo matū, he uaua ake te mahi.
Ko te koura totohu kei te takai ki roto i te koranu koura nickel matotoru, hiko pai i runga i te mata parahi, ka taea te tiaki i te PCB mo te wa roa;I tua atu, kei a ia ano te manawanui o te taiao kaore i etahi atu tukanga maimoatanga mata.I tua atu, ka taea hoki e te totohu koura te aukati i te whakakorenga o te parahi, ka whai hua te huihuinga kore-arahi.
Painga: ehara i te mea ngawari ki te oxidize, ka taea te penapena mo te wa roa, he papatahi te mata, he pai mo te whakapiri i nga titi aputa pai me nga waahanga me nga hononga konutai iti.Papa PCB pai me nga paatene (pērā i te papa waea pūkoro).Reflow fehokotaki'anga e taea te tukurua nga wa maha kahore nui mate o weldability.Ka taea te whakamahi hei rauemi turanga mo te waea waea COB (Chip On Board).
Nga huakore: te utu nui, te ngoikore o te kaha o te whakapiri, no te mea ko te whakamahinga o te tukanga nickel kore-electroplated, he ngawari ki te whai raruraru kōpae pango.Ko te paparanga nickel oxidizes i roto i te wa, me te pono mo te wa roa he take.
5. Totohu tine
I te mea he tine-a-tinana nga kaihono katoa o naianei, ka taea te taurite te paparanga tine ki tetahi momo konohi.Ko te tukanga o te totohu tine ka taea te hanga i nga puhui intermetallic konukura-tinihi papatahi, na te mea he rite te pai o te whakarewatanga o te tine totohu ki te whakamaaramatanga o te hau wera me te kore o te mahunga o te raru o te whakamaaramatanga o te hau wera;Kaore e taea te pupuri i te pereti tine mo te roa rawa, a me whakahaere te huihuinga kia rite ki te raupapa o te totohu tine.
Painga: He pai mo te hanga raina whakapae.E tika ana mo te tukatuka raina pai, e tika ana mo te whakapiri kore-arahi, tino pai mo te hangarau crimping.He pai rawa te papatahi, he pai mo te SMT.
Nga ngoikoretanga: Me pai nga tikanga rokiroki, he pai ake kia kaua e neke ake i te 6 marama, hei whakahaere i te tipu o te paku.Kaore i te pai mo te hoahoa whakawhiti whakapiri.I roto i te tukanga whakaputa, he tino tiketike te tukanga kiriata whakaahuru, ki te kore ka taka te kiriata whakaahuru.Mo te whakapiringa maha, he pai ake te tiaki hau N2.He raruraru ano te ine hiko.
6. Hiriwa totohu
Ko te tukanga totohu hiriwa kei waenga i te paninga pararopi me te whakakikorua nickel/koura electroless, he ngawari, he tere te tukanga;Ahakoa ka pa ki te wera, te makuku me te parahanga, ka taea e te hiriwa te mau tonu te pai o te weldability, engari ka ngaro tona kanapa.Ko te whakakikorua hiriwa kaore i te pai te kaha tinana o te whakakikorua nickel electroless/whakakikorua koura na te mea kaore he nickel i raro i te paparanga hiriwa.
Painga: Te tukanga ngawari, e tika ana mo te whakapiri kore-arahi, SMT.He tino papatahi te mata, he iti te utu, he pai mo nga raina tino pai.
Nga ngoikoretanga: Nga whakaritenga rokiroki teitei, ngawari ki te poke.Ko te kaha fehokotaki'anga he raruraru (raruraru micro-cavity).He mea ngawari ki te whai i nga ahuatanga hiko me te ngau Javani o te parahi i raro i te kiriata aukati.He raruraru ano te ine hiko
7, matū nickel palladium
Ka whakatauritea ki te rerenga o te koura, he paparanga ano o te palladium i waenga i te nickel me te koura, a ka taea e te palladium te aukati i te ahuatanga o te waikura i puta mai i te tauhohenga whakakapinga me te whakarite kia tino rite mo te rerenga koura.Ko te koura he mea whakakikoruatia ki te palladium, he pai te mata whakapiri.
Painga: He pai mo te whakapiri kore utu.Mata tino papatahi, e tika ana mo te SMT.Na roto i nga rua ka taea ano te koura nickel.He roa te wa rokiroki, kaore i te kino nga tikanga rokiroki.He pai mo te whakamatautau hiko.E tika ana mo te hoahoa whakapiri whakawhiti.He pai mo te here waea konumohe, he pai mo te pereti matotoru, he kaha ki te whakaeke i te taiao.
8. Te whakakikorua i te koura pakeke
Hei whakapai ake i te kakahu o te hua, whakanuia te maha o te whakauru me te tango me te whakakikorua i te koura pakeke.
Ko nga huringa maimoatanga mata o te PCB kaore i te tino nui, te ahua nei he mea tawhiti, engari me tohu ko nga huringa puhoi mo te wa roa ka arahi ki nga huringa nui.I roto i te take o te whakanui ake piiraa mo te tiaki taiao, te tukanga maimoatanga mata o PCB tino ka huri tino i roto i te heke mai.
Wā tuku: Hūrae-05-2023