Ko te tino kaupapa matua o PCB maimoatanga mata ko ki te whakarite solderability pai āhuatanga hiko ranei. Mai i te mea kei te noho tonu te parahi taiao i roto i te ahua o te waikura i te rangi, kaore pea ka noho tonu hei parahi taketake mo te wa roa, no reira ka hiahiatia etahi atu maimoatanga mo te parahi.

1. Ko te whakamaaramatanga o te hau wera (te mapu tine) te whakamaaramatanga o te hau wera, e mohiotia ana ko te whakamaarama o te hau wera (e mohiotia ana ko te rehu tine), he tikanga whakakikorua i te tine whakarewa (arahi) konuhono ki runga i te mata o te PCB me te rahinga (pupuhi) ki te hau kōpeke wera. Ka hangaia he paparanga whakakikorua e kore e aukati i te waikura parahi, engari e whakarato ana i te pai o te solderability. I te wa o te whakamaaramatanga o te hau wera, ka hanga te konuhono me te parahi he puhui konukura-tinina i te hononga. A, no te te papatairite te PCB ki te hau wera, me ruku i te reira i roto i te whakarewa whakarewa; ka pupuhi te maripi hau i te wai konupuku i mua i te pakari o te konupuku; ka taea e te maripi hau te whakaiti i te meniscus o te konupuku i runga i te mata parahi me te aukati i te piriti ki te piriti.

2. Organic Solderability Preservative (OSP) Ko te OSP he tukanga mo te maimoatanga mata o te pepa porowhita taia (PCB) parani parani e tutuki ana i nga whakaritenga o te tohutohu RoHS. Ko te OSP te whakapototanga o Organic Solderability Preservatives, kua whakamaoritia hei Organic Solderability Preservatives i te reo Hainamana, e mohiotia ana ano ko Copper Protector, Preflux ranei i te reo Ingarihi. Ma te ngawari, ko te OSP te whakatipu matū i tetahi paparanga o te kiriata pararopi ki runga i te mata parahi korekore. Ko tenei paparanga o te kiriata he anti-oxidation, te awangawanga waiariki, me te makuku ki te tiaki i te mata parahi mai i te waikura (te waikura, te whakangao ranei, me etahi atu) i roto i te taiao noa; engari i roto i te fehokotaki’anga muri pāmahana teitei, tenei ahua o te kiriata whakamarumaru me tino He mea ngawari ki te tango tere e te rere, kia taea te whakakotahi tonu te mata parahi pokekore kitea ki te whakarewa rewa ki te hononga solder kaha i roto i te rawa. wa poto.

3. Ka whakakikoruatia te pereti katoa ki te nickel me te koura

Ko te whakakikorua nickel-koura o te papa he paparanga nickel ki runga i te mata o te PCB katahi ano he apa koura. Ko te whakakikorua nickel te nuinga ki te aukati i te whakamaarama i waenga i te koura me te parahi. E rua nga momo o te koura nickel electroplated: whakakikorua koura ngohengohe (koura parakore, te mata koura e kore e titiro kanapa) me te whakakikorua koura pakeke (he maeneene te mata, he pakeke, he kakahu-aukati, kei roto te cobalt me ​​etahi atu mea, me te mata koura. ka marama ake te ahua). Ko te koura ngawari te nuinga e whakamahia ana mo te waea koura i te wa o te kohinga maramara; Ko te koura pakeke te nuinga e whakamahia ana mo te honohono hiko i nga waahi kore-paiherea.

4. Te koura rumaki Ko te koura rumaki he paparanga matotoru o te koranu nickel-koura me nga taonga 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 ki te taiao kaore etahi atu tukanga maimoatanga mata. I tua atu, ka taea hoki e te koura rumaki te aukati i te memeha o te parahi, ka whai hua te huihuinga kore-arahi.

5. Te tine rūmaki I te mea ko te katoa o naianei he mea hanga i runga i te tine, ka taea te taurite te paparanga tine ki tetahi momo konohiko. Ka taea e te tukanga rumaki tine te hanga i tetahi puhui intermetallic parahi-tine papatahi. Ma tenei ahuatanga ka rite te pai o te whakaurunga o te rumaki tine ki te whakamaaramatanga o te hau wera me te kore e pa te mamae o te upoko o te whakamaarama hau wera; e kore e taea te penapena nga papa rumaki tine mo te roa rawa , Me whakahaere te huihuinga kia rite ki te ota totohu tine.

6. Te hiriwa rumaki Ko te tukanga hiriwa rumaki kei waenganui i te paninga pararopi me te koura nickel/ruku kore hiko. He ngawari, he tere hoki te tukanga; ahakoa ka pa ki te wera, te makuku me te parahanga, ka taea tonu e te hiriwa te pupuri i te pai o te solderability. Engari ka ngaro tona kanapa. Ko te hiriwa rumaki karekau he pai te kaha tinana o te nickel electroless/koura rumaki na te mea karekau he nickel i raro i te paparanga hiriwa.

7. Ka whakatauritea ki te koura rumaki, ko te koura matū nickel palladium koura he paparanga ano o te palladium i waenga i te nickel me te koura. Ka taea e Palladium te aukati i te pirau na te tauhohenga whakakapinga me te whakarite kia tino rite mo te koura rumaki. Ka mau te koura ki runga i te palladium, e pai ana te mata whakapiri.

8. Ko te koura pakeke i whakakikoruatia hei whakapai ake i te kakahu o te hua me te whakanui ake i te maha o te whakauru me te tango.