Phunzirani izi, PCB board plating sichimangirira!

Panthawi yopanga ma board a PCB, zinthu zambiri zosayembekezereka zidzachitika, monga mkuwa wopangidwa ndi electroplated, plating copper plating, plating golide, plating lead alloy plating ndi plating layer delamination. Ndiye chifukwa chake stratification ndi chiyani?

Pansi pa kuwala kwa ultraviolet kuwala, photoinitiator yomwe imatenga mphamvu ya kuwala imawonongeka mu gulu laulere lomwe limayambitsa photopolymerization reaction ndipo limapanga molekyulu ya thupi yomwe imakhala yosasungunuka mu madzi a alkali. Powonekera, chifukwa cha polymerization yosakwanira, panthawi ya chitukuko, kutupa kwa filimuyo ndi kufewetsa, zomwe zimapangitsa kuti mizere yosadziwika bwino komanso ngakhale filimu ikugwere, zomwe zimapangitsa kuti filimuyo isagwirizane bwino ndi mkuwa; Ngati chiwonetserocho chikuchulukirachulukira, chimayambitsa zovuta pachitukuko, ndipo chidzatulutsanso kupotoza ndi kukwapula panthawi ya plating, ndikupanga plating infiltration. Choncho ndikofunika kulamulira mphamvu kukhudzana; Pambuyo pazitsulo zamkuwa, nthawi yoyeretsa sikophweka kuti ikhale yaitali kwambiri, chifukwa madzi oyeretsera amakhalanso ndi zinthu zina za acidic, ngakhale kuti zomwe zili ndi zofooka, koma zotsatira za mkuwa sizingatheke. kutengedwa mopepuka, ndipo ntchito yoyeretsa iyenera kuchitidwa motsatira ndondomeko ya ndondomekoyi.

Chifukwa chachikulu chomwe golide wosanjikiza amagwa kuchokera pamwamba pa nickel wosanjikiza ndi mankhwala pamwamba pa faifi tambala. Kusauka kwa chitsulo cha nickel ndikovuta kupeza zotsatira zokhutiritsa. Pamwamba pa zokutira faifi tambala n'zosavuta kutulutsa passivation filimu mu mlengalenga, monga mankhwala osayenera, izo adzalekanitsa golide wosanjikiza pamwamba pa faifi wosanjikiza. Ngati kutsegula sikuli koyenera mu electroplating, golide wosanjikiza adzachotsedwa pamwamba pa nickel wosanjikiza ndi peel off. Chifukwa chachiwiri ndikuti mutatha kuyambitsa, nthawi yoyeretsa imakhala yayitali kwambiri, zomwe zimapangitsa kuti filimuyo ikhale yopangidwanso pamtunda wa nickel, ndiyeno imapangidwa ndi gilded, zomwe zidzatulutsa zolakwika mu zokutira.

Pali zifukwa zambiri za plating delamination, ngati mukufuna kupanga zomwezo popanga mbale sizichitika, zimakhala zogwirizana kwambiri ndi chisamaliro ndi udindo wa akatswiri. Chifukwa chake, wopanga bwino kwambiri wa PCB azichita maphunziro apamwamba kwa aliyense wogwira ntchito pamisonkhano kuti aletse kubweretsa zinthu zotsika.