Kusanthula kwazifukwa zakusaya bwino kwa PCB

Kusanthula kwa zifukwa zosauka PCB ❖ kuyanika

1. Khomo

Mapiniwo ndi chifukwa cha hydrogen adsorbed pamwamba pa zigawo zopukutidwa, ndipo samamasulidwa kwa nthawi yayitali. Pangani njira ya plating kuti isanyowetse pamwamba pa zigawo zopukutidwa, kotero kuti plating wosanjikiza sungayikidwe ndi electrolytically. Pamene makulidwe a zokutira m’dera lozungulira malo osinthika a haidrojeni ukuwonjezeka, pinhole imapangidwa pamalo osinthika a hydrogen. Amadziwika ndi dzenje lozungulira lonyezimira ndipo nthawi zina mchira wawung’ono wokwera. Pamene plating yankho alibe chonyowetsa wothandizila ndipo kachulukidwe panopa ndi mkulu, pinholes mosavuta kupanga.

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2. Pockmark

Kutsekerako kumachitika chifukwa cha malo odetsedwa a pamwamba pake, kutsekemera kwa zinthu zolimba, kapena kuyimitsidwa kwa chinthu cholimba muzitsulo zopangira. Ikafika pamwamba pa workpiece pansi pa ntchito ya magetsi, imayikidwa pa iyo, yomwe imakhudza electrolysis ndikuyika zinthu zolimba izi mu gawo la electroplating, tokhala ting’onoting’ono (maenje) amapangidwa. Chikhalidwe chake ndi chakuti ndi convex, palibe chowoneka chowala, ndipo palibe mawonekedwe okhazikika. Mwachidule, zimayamba chifukwa cha zonyansa zogwirira ntchito komanso njira yakuda ya plating.

3. Maulendo amlengalenga

Kuthamanga kwa mpweya kumachitika chifukwa cha zowonjezera zowonjezera kapena kachulukidwe kakakulu kakakulu kakakulu kakakulu kakachulukidwe kakakulu, zomwe zimachepetsa magwiridwe antchito a cathode, zomwe zimapangitsa kuchuluka kwa haidrojeni. Ngati njira plating ikuyenda pang’onopang’ono ndipo cathode ikuyenda pang’onopang’ono, mpweya wa haidrojeni udzakhudza makonzedwe a makristasi a electrolytic panthawi yokwera pamwamba pa workpiece, kupanga mikwingwirima yopita pansi mpaka mmwamba.

4. Kuphimba (zowonekera)

Masking ndi chifukwa chakuti kung’anima kofewa pazikhomo pamwamba pa workpiece sikunachotsedwe, ndipo kuyanika kwa electrolytic deposition sikungathe kuchitidwa pano. Zomwe zimayambira zimawonekera pambuyo pa electroplating, motero zimatchedwa zowonekera (chifukwa kung’anima kofewa ndi gawo lowonekera kapena lowonekera).

5. Chophimbacho ndi chophwanyika

Pambuyo pa SMD electroplating, mutatha kudula nthiti ndi kupanga, zikhoza kuwoneka kuti pali ming’alu m’mphepete mwa zikhomo. Pakakhala mng’alu pakati pa nickel wosanjikiza ndi gawo lapansi, zimaganiziridwa kuti nickel wosanjikiza ndi brittle. Pakakhala mng’alu pakati pa wosanjikiza wa malata ndi nickel wosanjikiza, amaonedwa kuti wosanjikiza wa malatawo ndi wosasunthika. Zomwe zimayambitsa brittleness nthawi zambiri zimakhala zowonjezera, zowala mopitirira muyeso, kapena zonyansa zambiri zamagulu kapena organic mu njira yopangira.