N'chifukwa chiyani mwambo PCB mkuwa plating pamwamba kuwira?

N'chifukwa chiyani mwambo PCB mkuwa plating pamwamba kuwira?

Makonda PCBpamwamba kubwebweta ndi chimodzi mwazowonongeka kwambiri pakupanga kwa PCB.Chifukwa cha zovuta za PCB kupanga ndondomeko ndi kukonza ndondomeko, makamaka mankhwala chonyowa mankhwala, n'zovuta kupewa kubwebweta zolakwika pa bolodi.

Kuphulika paChithunzi cha PCBkwenikweni ndi vuto la kusagwirizana kwamphamvu pa bolodi, ndipo kuwonjezera, vuto lapamwamba pa bolodi, lomwe limaphatikizapo mbali ziwiri:

1. PCB vuto ukhondo pamwamba;

2. Micro roughness (kapena pamwamba mphamvu) ya PCB pamwamba;mavuto onse kuthwanima pa bolodi dera akhoza mwachidule monga zifukwa pamwamba.Mphamvu yomangiriza pakati pa zokutira ndi osauka kapena otsika kwambiri, mu wotsatira kupanga ndi processing ndondomeko ndi msonkhano ndondomeko n'kovuta kukana kupanga ndi processing ndondomeko opangidwa mu ❖ kuyanika nkhawa, kupsyinjika makina ndi matenthedwe nkhawa, ndi zina zotero, chifukwa osiyana. madigiri olekanitsa pakati pa zochitika zokutira.

Zina zomwe zimapangitsa kuti pakhale kutsika kwapamwamba pakupanga ndi kukonza kwa PCB ndizofupikitsidwa motere:

Gawo laling'ono la PCB - zovuta zochizira mbale za mkuwa;Makamaka ena woonda gawo lapansi (nthawi zambiri m'munsimu 0.8 mm), chifukwa gawo lapansi kulimba ndi osauka, zoipa ntchito burashi mbale mbale makina, mwina sangathe bwino kuchotsa gawo lapansi pofuna kupewa makutidwe ndi okosijeni pamwamba zojambulazo mkuwa popanga kupanga. ndi processing ndi wosanjikiza wapadera processing, pamene wosanjikiza ndi woonda, burashi mbale n'zosavuta kuchotsa, koma processing mankhwala n'kovuta, Choncho, n'kofunika kulabadira kulamulira kupanga ndi processing, kuti asabweretse vuto. kutulutsa thovu komwe kumachitika chifukwa cha kulephera kumangirira pakati pa zitsulo zamkuwa zamkuwa ndi mankhwala amkuwa;pamene wosanjikiza wopyapyala wamkati wadetsedwa, padzakhalanso mdima wandiweyani ndi bulauni, mtundu wosiyana, ndikuda kocheperako.

PCB bolodi pamwamba m'kati Machining (kubowola, lamination, mphero, etc.) chifukwa mafuta kapena madzi fumbi kuipitsidwa pamwamba mankhwala ndi osauka.

3. PCB copper kumira burashi mbale ndi osauka: kukakamizidwa kwa mbale akupera pamaso kumira mkuwa ndi lalikulu kwambiri, kuchititsa mapindikidwe dzenje, ndi fillet mkuwa zojambulazo pa dzenje ndi ngakhale m'munsi zinthu kutayikira pa dzenje, zomwe zingachititse kuwira. chodabwitsa pa dzenje m`kati mkuwa kumira, plating, malata kupopera mbewu mankhwalawa ndi kuwotcherera;Ngakhale mbale burashi sichichititsa kutayikira kwa gawo lapansi, mochulukira burashi mbale kuonjezera roughness wa dzenje mkuwa, kotero m`kati yaying'ono dzimbiri coarsening, zojambulazo mkuwa n'zosavuta kutulutsa mochulukira coarsening chodabwitsa, pali idzakhalanso chiopsezo china cha khalidwe;Choncho, chidwi chiyenera kuperekedwa ku kulimbikitsa kulamulira kwa ndondomeko ya mbale ya burashi, ndipo magawo a ndondomeko ya mbale ya brush akhoza kusinthidwa kukhala abwino kwambiri kupyolera mu kuyesa kwa mavalidwe ndi kuyesa filimu yamadzi.

4. Kutsukidwa PCB vuto: chifukwa katundu mkuwa electroplating processing ayenera kudutsa zambiri mankhwala mankhwala amadzimadzi mankhwala processing, mitundu yonse ya asidi-m'munsi ndi sanali polar organic zosungunulira monga mankhwala, bolodi wosambitsa si oyera, makamaka katundu mkuwa kusintha kuwonjezera pa wothandizila, osati angayambitse mtanda kuipitsidwa, komanso adzachititsa gulu kukumana m'deralo processing zoipa kapena zoipa zotsatira za mankhwala, chilema cha m'njira zosiyanasiyana, chifukwa ena mwa mphamvu;Choncho, chidwi chiyenera kuperekedwa ku kulimbikitsa kulamulira kwa kutsuka, makamaka kuphatikizapo kulamulira kwa kayendedwe ka madzi oyeretsera, khalidwe la madzi, nthawi yotsuka, ndi nthawi yodontha ya mbale;makamaka m'nyengo yozizira, kutentha kumakhala kochepa, zotsatira za kutsuka zidzachepetsedwa kwambiri, chisamaliro chiyenera kulipidwa pakuwongolera kusamba.