1. PCB jiyya ta jiki:

Anti-oxidation, tin spray, tin-free tin spray, zinare nutsewa, tin nutsewa, azurfa nutsewa, plating mai wuya, cikakken allon gwal, yatsa na gwal, nickel palladium zinariya OSP: ƙananan farashi, mai kyau solderability, matsananciyar ajiya yanayi, lokaci Short, fasaha mai dacewa da muhalli, walda mai kyau da santsi.

Tin fesa: Farantin fesa gabaɗaya nau’in nau’in PCB ne na multilayer (Layer 4-46), wanda manyan hanyoyin sadarwa na cikin gida, kwamfuta, kayan aikin likitanci da masana’antar sararin samaniya da rukunin bincike suka yi amfani da su. Yatsan zinari (haɗin yatsa) shine ɓangaren haɗawa tsakanin ma’aunin ƙwaƙwalwa da ramin ƙwaƙwalwar ajiya, duk sigina ana watsa su ta yatsun zinari.

Yatsan zinare ya ƙunshi yawancin lambobin sadarwa na rawaya na zinare. Domin saman yana da zinari kuma ana tsara lambobin sadarwa kamar yatsu, ana kiransa “yatsa na zinari”.

Haƙiƙa an lulluɓe ɗan yatsan zinare tare da ɗigon zinari akan allon tagulla ta hanyar tsari na musamman, saboda zinare yana da matuƙar juriya ga iskar oxygen kuma yana da ƙarfi mai ƙarfi.

Duk da haka, saboda tsadar zinariya, yawancin ƙwaƙwalwar ajiya yanzu an maye gurbinsu da tin plating. Tun daga shekarun 1990, kayan kwano sun shahara. A halin yanzu, “yatsun zinare” na motherboards, ƙwaƙwalwar ajiya da katunan zane kusan duk ana amfani dasu. Abun tin, kawai ɓangaren wuraren tuntuɓar sabar masu aiki/masu aiki za su ci gaba da kasancewa da zinari, wanda ke da tsada ta zahiri.

2. Me yasa amfani da faranti masu launin zinari

Yayin da matakin haɗin kai na IC ya zama mafi girma da girma, IC fil ɗin ya zama mafi girma. Tsarin tin na fesa a tsaye yana da wuya a daidaita ɓangarorin bakin ciki, wanda ke kawo wahala ga sanya SMT; Bugu da kari, rayuwar shiryayye na farantin gwangwani gajere ne sosai.

Allon da aka yi da zinari kawai yana magance waɗannan matsalolin:

1. Domin surface Dutsen tsari, musamman ga 0603 da kuma 0402 matsananci-kananan surface firam, saboda flatness na kushin ne kai tsaye alaka da ingancin solder manna bugu tsari, shi yana da wani hukunci tasiri a kan ingancin m reflow. soldering, don haka dukan hukumar Gold plating ne na kowa a high-yawa da matsananci-kananan surface Dutsen tafiyar matakai.

2. A mataki na samar da gwaji, saboda dalilai kamar sayan kayan aiki, yawanci ba wai ana sayar da allon nan da nan idan ya zo ba, amma ana amfani da shi na tsawon makonni ko ma watanni. Rayuwar rayuwar da aka yi da katakon zinare ya fi na gubar. Tin alloy ya fi tsayi sau da yawa, don haka kowa yana jin daɗin amfani da shi.

Bayan haka, farashin PCB-plated zinariya a cikin samfurin matakin ya kusan iri ɗaya da na gubar-tin gami allo.

Amma yayin da wayoyi suka yi yawa, faɗin layin da tazarar sun kai 3-4MIL.

Sabili da haka, an kawo matsalar gajeriyar kewayawa ta waya: yayin da yawan siginar ya zama mafi girma kuma mafi girma, siginar siginar a cikin nau’i mai nau’i mai yawa wanda sakamakon fata ya haifar yana da tasiri mai mahimmanci akan siginar sigina.

Tasirin fata yana nufin: babban mitar canjin halin yanzu, na yanzu zai kasance yana mai da hankali kan saman waya don gudana. Dangane da lissafin, zurfin fata yana da alaƙa da mita.

Domin magance matsalolin da ke sama na allunan da aka yi da zinari, PCBs masu amfani da allunan zinari galibi suna da halaye masu zuwa:

1. Domin tsarin crystal kafa ta nutsewa zinariya da zinariya plating ne daban-daban, nutsewa zinariya zai zama zinariya yellower fiye da zinariya plating, kuma abokan ciniki za su kasance mafi gamsu.

2. Zurfin zinari yana da sauƙin walda fiye da platin zinare, kuma ba zai haifar da walda mara kyau ba kuma yana haifar da gunaguni na abokin ciniki.

3. Saboda allon zinari na nutsewa kawai yana da nickel da zinare akan kushin, siginar siginar a cikin tasirin fata ba zai shafi siginar akan layin jan karfe ba.

4. Domin nutsewa zinariya yana da tsari mai zurfi fiye da zinariya plating, ba shi da sauƙi don samar da iskar shaka.

5. Domin allon zinari na nutsewa kawai yana da nickel da zinariya akan pads, ba zai haifar da wayoyi na zinariya ba kuma yana haifar da ɗan gajeren gajere.

6. Saboda allon zinari na nutsewa kawai yana da nickel da zinariya a kan pads, abin rufe fuska a kan kewaye da Layer na jan karfe suna da ƙarfi sosai.

7. Aikin ba zai shafi nisa ba lokacin yin ramuwa.

8. Saboda tsarin crystal da aka kafa ta hanyar nutsewa na zinariya da zinariya plating ya bambanta, damuwa na farantin zinariya na nutsewa ya fi sauƙi don sarrafawa, kuma don samfurori tare da haɗin gwiwa, ya fi dacewa da aikin haɗin gwiwa. A lokaci guda kuma, daidai yake saboda zinaren nutsewa yana da laushi fiye da gilding, don haka farantin zinare na nutsewa ba ya jurewa kamar yatsan zinare.

9. Ƙaƙƙarfan kwanciyar hankali da kuma tsayawa ta rayuwa na katako na zinariya na nutsewa suna da kyau kamar katako na zinariya.

Don tsarin gilding, tasirin tinning yana raguwa sosai, yayin da tasirin zinare na nutsewa ya fi kyau; sai dai idan masana’anta na buƙatar ɗauri, yawancin masana’antun yanzu za su zaɓi tsarin zinari na nutsewa, wanda galibi ya zama ruwan dare A cikin yanayi, jiyya na PCB kamar haka:

Plating na Zinariya (zinari na lantarki, gwal na nutsewa), platin azurfa, OSP, fesa tin (gubar da babu gubar).

Waɗannan nau’ikan sun fi dacewa don FR-4 ko CEM-3 da sauran allunan. Kayan tushe na takarda da kuma hanyar magani na farfajiyar rufin rosin; idan gwangwani ba shi da kyau (cin abinci mara kyau), idan an cire man siyar da sauran masana’anta saboda dalilai na samarwa da fasahar kayan aiki.

Anan kawai don matsalar PCB, akwai dalilai masu zuwa:

1. A lokacin bugu na PCB, ko akwai farfajiyar fim ɗin mai-permeable akan matsayi na PAN, wanda zai iya toshe tasirin tinning; Ana iya tabbatar da wannan ta hanyar gwajin bleaching tin.

2. Ko matsayi na lubrication na matsayi na PAN ya dace da buƙatun ƙira, wato, ko aikin tallafi na ɓangaren za a iya tabbatar da shi a lokacin zane na kushin.

3. Ko kushin ya gurbata, ana iya samun wannan ta gwajin gurɓataccen ion; maki ukun da ke sama su ne ainihin mahimman abubuwan da masana’antun PCB suka yi la’akari da su.

Game da abũbuwan amfãni da rashin amfani da dama hanyoyin da surface jiyya, kowane yana da nasa ƙarfi da kuma rauni!

Dangane da plating na zinariya, yana iya kiyaye PCBs na dogon lokaci, kuma yana ƙarƙashin ƙananan canje-canje a yanayin zafi da zafi na yanayin waje (idan aka kwatanta da sauran jiyya na saman), kuma ana iya adana gabaɗaya na kusan shekara guda; da tin-fesa surface jiyya ne na biyu, OSP sake, wannan Ya kamata a mai da hankali sosai ga ajiya lokaci na biyu surface jiyya a yanayi zafin jiki da kuma zafi.

A karkashin yanayi na al’ada, yanayin kula da azurfa nutsewa ya ɗan bambanta, farashin kuma yana da girma, kuma yanayin ajiya ya fi buƙata, don haka yana buƙatar a shirya shi a cikin takarda maras sulfur! Kuma lokacin ajiyar yana kusan watanni uku! Dangane da tasirin tinning, zinare nutsewa, OSP, feshin kwano, da sauransu a zahiri iri ɗaya ne, kuma masana’antun sun fi la’akari da ingancin farashi!