Nkhani - Momwe Mungasankhire Pamapeto Pamapangidwe Anu a PCBⅠ Kodi ndi Motani

Momwe Mungasankhire Surface Finish pa PCB Design Yanu

---Katswiri Wotsogolera ku PCB Surface Finishes

Ⅰ Kodi ndi Motani

Adalemba:Nov15, 2022

Magulu: Mabulogu

Tags: pcb,pcba,pcb msonkhano,wopanga pcb, kupanga kwa pcb

Pankhani yomaliza pamwamba, pali zosankha zosiyanasiyana, monga HASL, OSP, ENIG, ENEPIG, Hard Gold, ISn, IAg, ndi zina zotero. Nthawi zina, zingakhale zophweka kupanga chisankho, monga kugwirizana kwa m'mphepete kumapita ku zovuta. golidi;HASL kapena HASL-free ndi yabwino kuyika zida zazikulu za SMT.Komabe, zitha kukhala zachinyengo kusankha kumaliza kumodzi kwa HDI board yokhala ndi Ball Grid Arrays (BGAs) ngati palibe zowunikira zina.Pali zinthu monga bajeti yanu ya polojekitiyi, zofunikira pakudalirika kapena zopinga za nthawi yogwira ntchito ziyenera kuganiziridwa pamikhalidwe ina.Mtundu uliwonse wa PCB pamwamba mapeto ali ubwino wake ndi kuipa, zingakhale zosokoneza kwa okonza PCB kusankha amene ali oyenera PCB matabwa anu.Tili pano kuti tikuthandizeni kudziwa zomwe takumana nazo zaka zambiri monga opanga.

1. Kodi kumaliza kwa PCB ndi chiyani

Kuyika kumalizidwa kwapamwamba (mankhwala apamwamba / zokutira pamwamba) ndi imodzi mwamasitepe omaliza opanga ma PCB.Kumapeto kwa pamwamba kumapanga mawonekedwe ofunikira pakati pa bolodi lopanda kanthu la PCB ndi zigawo zake, zomwe zimagwira ntchito pazifukwa ziwiri zofunika, kupereka malo ogulitsidwa kwa PCB komanso kuteteza mkuwa wotsalawo kuphatikizapo mayendedwe, mapepala, mabowo ndi ndege zapansi kuchokera ku okosijeni kapena kuipitsidwa, pomwe chigoba cha solder chimakwirira madera ambiri.

Kumaliza kwapamwamba ndikofunikira pakupanga PCB PCB ShinTech.Kupereka pamwamba solderable kwa PCB msonkhano ndi kuteteza poyera mkuwa kuti makutidwe ndi okosijeni ndi kuipitsidwa.

Zomaliza zamakono zilibe lead, molingana ndi malangizo a Restriction of Hazardous Substances (RoHS) ndi Waste Electrical and Electronic Equipment (WEEE).Zosankha zamakono zomaliza za PCB zikuphatikiza:

● LF-HASL (Lead Free Hot Air Solder Leveling)
● OSP (Organic Solderability Preservatives)
● ENIG (Electroless Nickel Immersion Gold)
● ENEPIG (Electroless Nickel Electroless Palladium Immersion Gold)
● Electrolytic Nickel/Gold - Ni/Au (Golide Wolimba/Wofewa)
● Kumiza Siliva, IAg
●Tini Yoyera kapena Mipiringidzo, ISn

2. Momwe mungasankhire kumaliza kwa PCB yanu

Mtundu uliwonse wa PCB pamwamba mapeto ali ubwino wake ndi kuipa, zingakhale zosokoneza kwa okonza PCB kusankha amene ali oyenera PCB matabwa anu.Kusankha yoyenera pamapangidwe anu kumafuna kutengera zinthu zingapo monga izi.

★ Budget
★ Ma board board omaliza ogwiritsira ntchito (mwachitsanzo kutentha, kugwedezeka, RF).
★ Zofunikira kwa Wopempha Mtsogoleri waulere, wokonda zachilengedwe.
★ Zofunikira zodalirika pa bolodi la PCB.
★ Mtundu wa Zigawo, kachulukidwe kapena zofunikira pakuphatikiza mwachitsanzo, cholumikizira, SMT, kulumikizana ndi mawaya, kugulitsa pabowo, ndi zina zambiri.
★ Zofunika pakupalasa pamwamba pa ma SMT pads pakugwiritsa ntchito BGA.
★ Zofunikira pa moyo wa alumali ndi kusinthikanso kwakumapeto kwa pamwamba.
★ Kusagwedezeka / kugwa.Mwachitsanzo, ENIG siyoyenera foni yanzeru popeza foni yanzeru imafunikira ma bond a malata-mkuwa kuti agwedezeke kwambiri komanso kukana kutsika m'malo mwa ma bondi a tini-nickel.
★ Kuchuluka ndi Kupitilira.Pa kuchuluka kwa ma PCB, malata omiza amatha kukhala njira yodalirika komanso yotsika mtengo kuposa ENIG ndi Immersion Silver komanso zovuta zowononga zitha kupewedwa.M'malo mwake, siliva womiza ndi wabwino kuposa ISn pagulu laling'ono.
★ Kutengeka ndi dzimbiri kapena kuipitsidwa.Mwachitsanzo, kumiza siliva kumaliza kumakonda kukwawa dzimbiri.Onse OSP ndi Immersion malata amakhudzidwa ndi kuwonongeka.
★ Kukongoletsa kwa board, etc..

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Nthawi yotumiza: Nov-15-2022