1. Surface na PCB: OSP, HASL, HASL-free gubar, Immersion Tin, ENIG, Azurfa Immersion, Hard zinariya plating, Plating zinariya ga dukan allo, zinariya yatsa, ENEPIG…

OSP: low cost, mai kyau solderability, matsananci yanayin ajiya, gajeren lokaci, muhalli fasahar, mai kyau waldi, santsi ...

HASL: yawanci samfuran HDI PCB masu yawa ne (4-46 layers), manyan hanyoyin sadarwa, kwamfutoci, kayan aikin likita da kamfanonin sararin samaniya da rukunin bincike sun yi amfani da su.

Yatsan zinari: shine haɗin kai tsakanin ƙwaƙwalwar ajiyar ƙwaƙwalwar ajiya da guntu ƙwaƙwalwar ajiya, duk sigina ana aika da yatsan zinari.

Yatsan zinari ya ƙunshi adadin lambobin sadarwa na zinare, waɗanda ake kira “yatsar zinari” saboda saman da aka yi da zinari da tsarinsu mai kama da yatsa. Yatsar zinari a haƙiƙa yana amfani da tsari na musamman don yin suturar tagulla tare da zinare, wanda ke da matukar juriya ga iskar shaka kuma yana da ƙarfi sosai. Amma farashin zinariya yana da tsada, ana amfani da plating na yanzu don maye gurbin ƙarin ƙwaƙwalwar ajiya. Daga karni na 90 na karshe, kayan kwano sun fara yaduwa, motherboard, ƙwaƙwalwar ajiya, da na'urorin bidiyo irin su "yatsa na zinariya" kusan ana amfani da kayan tin, kawai wasu manyan kayan aikin uwar garken / kayan aikin aiki za su tuntuɓi batu don ci gaba da ci gaba. al'adar yin amfani da zinariya plated, don haka farashin yana da ɗan tsada.

1. Me yasa amfani daallo plating zinariya?

Tare da haɗin kai na IC mafi girma da girma, IC ƙafa yana ƙara yawa. Yayin da tsari na fesa tin a tsaye yana da wahala a busa kushin walda mai kyau, wanda ke kawo wahala ga hawan SMT; Bugu da kari, rayuwar shiryayye na farantin fesa tin gajeru ne. Koyaya, farantin zinare yana magance waɗannan matsalolin:

1.) Domin surface Dutsen fasaha, musamman ga 0603 da kuma 0402 matsananci-kananan tebur Dutsen, saboda flatness na waldi kushin ne kai tsaye alaka da ingancin solder manna bugu tsari, a baya na sake kwarara waldi quality yana da. wani hukunci tasiri, don haka, dukan farantin zinariya plating a high yawa da matsananci-kananan tebur Dutsen fasaha ne sau da yawa gani.

2.) A ci gaba lokaci, da tasiri na dalilai kamar aka gyara procument ne sau da yawa ba hukumar zuwa waldi nan da nan, amma sau da yawa da jira 'yan makonni ko ma watanni kafin amfani, shiryayye rayuwa na zinariya plated jirgin ya fi tsayi fiye da terne. karfe sau da yawa, don haka kowa da kowa yana shirye ya ɗauka. Bayan haka, PCB-plated zinariya a cikin digiri na farashin matakin samfurin idan aka kwatanta da faranti na pewter

3.)

4.) Amma tare da ƙarin ƙarancin wayoyi, faɗin layi, tazara ya kai 3-4MIL

Sabili da haka, yana kawo matsala na gajeriyar kewayawa na waya ta zinari: tare da ƙara yawan siginar siginar, tasirin watsa siginar a cikin sutura masu yawa saboda tasirin fata ya zama mafi bayyane.

(Sakamakon fata : High mita alternating current, current zai ayan mayar da hankali a kan saman da waya kwarara. Bisa ga lissafin, fata zurfin yana da alaka da mita.)

1. Me yasa amfani daimmersion zinariya PCB?

Akwai wasu halaye don nunin PCB na zinare kamar ƙasa:

1.) Tsarin crystal da aka kafa ta hanyar nutsewa na zinariya da zinariya plating ya bambanta, launi na zinare na zinari zai zama mafi kyau fiye da zinariya plating kuma abokin ciniki ya fi gamsuwa. Sa'an nan kuma damuwa na farantin zinari mai nutsewa yana da sauƙin sarrafawa, wanda ya fi dacewa da sarrafa samfuran. A lokaci guda kuma saboda zinari yana da laushi fiye da zinariya, don haka farantin zinariya ba sa sawa - yatsan zinare mai jurewa.

2.) Immersion Zinariya yana da sauƙin waldawa fiye da plating na zinari, kuma ba zai haifar da walƙiya mara kyau da gunaguni na abokin ciniki ba.

3.) zinaren nickel yana samuwa ne kawai akan kushin walda a kan ENIG PCB, siginar siginar a cikin tasirin fata yana cikin Layer na jan karfe, wanda ba zai shafi siginar ba, kuma kada ku jagoranci gajeriyar kewayawa don wayar zinare. Soldermask a kan kewaye yana da ƙarfi sosai tare da yadudduka na tagulla.

4.) The crystal tsarin na nutsewa zinariya ne denser fiye da zinariya plating, da wuya a samar da hadawan abu da iskar shaka

5.) Ba za a yi tasiri a kan tazara ba lokacin da aka biya diyya

6.) Lalacewa da rayuwar sabis na farantin zinariya yana da kyau kamar na farantin zinariya.

1. Immersion Gold VS Zinare plating

Akwai nau'o'in fasaha na platin zinare iri biyu: daya shine zinare na lantarki, ɗayan kuma Immersion Gold

Don tsarin aikin zinari, tasirin tin yana raguwa sosai, kuma tasirin zinari ya fi kyau; Sai dai idan masana'anta na buƙatar ɗaurin, ko yanzu yawancin masana'antun za su zaɓi tsarin nutsewar gwal!

Kullum, da surface jiyya na PCB za a iya raba zuwa wadannan iri: zinariya plating (electroplating, immersion zinariya), azurfa plating, OSP, HASL (tare da kuma ba tare da gubar), waxanda suke da yafi ga FR4 ko CEM-3 faranti, takarda tushe. kayan da rosin shafi surface jiyya; Akan talakawan tin (cin talakawan gwangwani) wannan idan an cire masana'antun manna da dalilan sarrafa kayan.

Akwai wasu dalilai na matsalar PCB:

1. A lokacin bugu na PCB, ko akwai farfajiyar fim mai ratsawa akan PAN, zai iya toshe tasirin tin; Ana iya tabbatar da wannan ta hanyar gwajin solder mai iyo

2. Ko matsayin kayan ado na PAN na iya saduwa da buƙatun ƙira, wato, ko za a iya tsara kushin walda don tabbatar da goyon bayan sassan.

3. Kushin walda ba ya gurɓata, wanda za'a iya auna shi ta hanyar gurɓataccen ion; t

Game da saman:

Zinariya plating, zai iya sa PCB ajiya lokaci ya fi tsayi, kuma ta wurin waje yanayi zafin jiki da zafi canji ne kananan (idan aka kwatanta da sauran surface jiyya), kullum, za a iya adana game da shekara guda; HASL ko jagora kyauta HASL surface jiyya na biyu, OSP sake, biyu surface jiyya a cikin yanayin zafin jiki da zafi ajiya lokacin kula da mai yawa na

A karkashin yanayi na al'ada, jiyya na saman azurfa ya ɗan bambanta, farashin kuma yana da girma, yanayin adanawa ya fi buƙata, buƙatar yin amfani da kayan aikin marufi na sulfur! Kuma a ajiye shi kamar wata uku! A kan tasirin tin, zinari, OSP, tin SPRAY shine ainihin kusan iri ɗaya, masana'antun sun fi la'akari da aikin farashi!