The solder abin rufe fuska bayyanar da ci gaban tsari a cikin Kwamitin PCB masana’antu tsari ne PCB jirgin tare da solder mask bayan allo bugu. Rufe gammaye a kan allon PCB tare da fim ɗin diazo don kada hasken ultraviolet ya haskaka su yayin aiwatar da fallasa, kuma mai siyar da juriya na kariya yana da ƙarfi a haɗe zuwa saman PCB bayan hasken ultraviolet, kuma ba a fallasa pads ɗin. zuwa hasken ultraviolet. Hasken hasken wuta na iya fallasa fakitin tagulla ta yadda za a iya shafa gubar da kwano yayin daidaitawar iska mai zafi.

Dalilin bayyanar allon kewayawa shine don ba da haske da toshe ta hasken ultraviolet. Bangaren fili na fim ɗin da busassun fim ɗin suna jujjuya halayen polymerization na gani, wato, ƙarƙashin hasken ultraviolet, mai ɗaukar hoto yana ɗaukar makamashin hasken kuma ya lalace cikin radicals kyauta, kuma radicals na kyauta sun sake fara haske. A polymerized monomer sha polymerization da giciye-hade dauki, da kuma Forms a macromolecular tsarin insoluble a tsarma alkali bayani bayan dauki. Fim ɗin yana da launin ruwan kasa, hasken ultraviolet ba zai iya shiga ba, kuma fim ɗin ba zai iya yin polymerization na gani ba tare da fim ɗin busassun daidai. Gabaɗaya fallasa ana aiwatar da shi a cikin na’ura mai ɗaukar hoto ta atomatik mai gefe biyu.

Akwai nau’ikan fallasa iri biyu: fiddawar kewayawa da bayyanar abin rufe fuska. Ayyukan shine a warkar da yankin da ba a kwance ba ta hanyar hasken ultraviolet, sa’an nan kuma inganta shi don samar da tsarin da’irar ko tsarin juriya na solder.

Tsarin bayyanar da kewaye shine sanya fim mai ɗaukar hoto akan allon jan karfe, sannan a haɗa shi tare da ƙirar kewaye mara kyau kuma a fallasa shi da hasken ultraviolet. Fim ɗin mai ɗaukar hoto wanda haskoki na ultraviolet ke haskakawa zai fuskanci amsawar polymerization. Fim ɗin mai ɗaukar hoto a nan zai iya tsayayya da Na2CO3 mai rauni alkalin yayin haɓakawa. Ana wanke maganin, kuma ɓangaren da ba a sani ba za a wanke shi yayin ci gaba. Ta wannan hanyar, tsarin kewayawa a kan fim ɗin mara kyau yana samun nasarar canjawa wuri zuwa allon katako na jan karfe;

Tsarin bayyanar abin rufe fuska iri ɗaya ne: yi amfani da fenti mai ɗaukar hoto a kan allon kewayawa, sannan rufe wuraren da ake buƙatar siyar da su yayin fallasa, ta yadda za a fallasa pads bayan haɓakawa.