Wayar tagulla ta PCB tana faɗuwa (wanda kuma aka fi sani da zubar jan karfe). Masana'antun PCB duk sun ce matsala ce ta laminate kuma tana buƙatar masana'antar samar da su don ɗaukar mummunan asara.

1. Bakin jan karfe ya yi yawa. Bakin jan karfe na electrolytic da ake amfani da shi a kasuwa gabaɗaya galvanized ne mai gefe guda (wanda akafi sani da ashing foil) da kuma jan ƙarfe mai gefe guda (wanda akafi sani da jan foil). Yawanci jefar jan karfe ne gabaɗaya galvanized jan karfe sama da 70um Foil, ja da foil ash da ke ƙasa 18um m ba su da wani tsari na jan ƙarfe. Lokacin da ƙirar da'irar abokin ciniki ya fi layin etching, idan an canza ƙayyadaddun takaddun bayanan jan ƙarfe amma sigogin etching sun kasance ba su canzawa, lokacin zama na foil ɗin jan ƙarfe a cikin maganin etching ya yi tsayi da yawa. Domin zinc asalin ƙarfe ne mai aiki, lokacin da wayar tagulla akan PCB ta nutsar da ita a cikin maganin etching na dogon lokaci, babu makawa zai haifar da lalatawar kewayen da'irar, yana haifar da wasu bakin ciki da ke goyan bayan tutiya Layer gaba ɗaya. rabu da substrate. Wato wayar tagulla ta fado. Wani yanayi kuma shine babu matsala tare da sigogin etching na PCB, amma bayan an wanke etching da ruwa da bushewa mara kyau, wayar tagulla kuma tana kewaye da ragowar etching a saman PCB. Idan ba a sarrafa ta na dogon lokaci ba, zai kuma haifar da wuce gona da iri na wayar tagulla. Jefa jan karfe. Ana bayyana wannan yanayin gabaɗaya azaman mai da hankali kan layukan bakin ciki, ko kuma lokacin lokacin yanayi mai ɗanɗano, lahani iri ɗaya zai bayyana akan PCB gabaɗaya. Cire wayar tagulla don ganin cewa launin farfajiyar lamba tare da layin tushe (wanda ake kira roughened surface) ya canza. Launin jakar tagulla ya bambanta da foil ɗin tagulla na yau da kullun. Ana ganin launin jan ƙarfe na asali na Layer na ƙasa, kuma ƙarfin bawon tagulla a layin mai kauri shima al'ada ne.

2. Wani karo yana faruwa a cikin gida a cikin tsarin PCB, kuma an raba wayar tagulla daga substrate ta ƙarfin injin waje. Wannan rashin aikin yi mara kyau ne ko daidaitawa. Wayar tagulla da aka jefar za ta sami bayyananniyar karkatarwa ko tarkace/tallafi a hanya guda. Idan ka kware wayar tagulla a ɓangaren da ba ta da lahani, ka dubi ƙaƙƙarfan fuskar tagulla, za ka ga cewa launin tagulla na tagulla na al'ada ne, ba za a sami yashwar gefe ba, da ƙarfin bawo. na tagulla foil ne na al'ada.

3. Tsarin kewaye na PCB bai dace ba. Idan aka yi amfani da foil ɗin tagulla mai kauri don zayyana da'ira mai sirara da yawa, hakanan zai haifar da wulakanci da yawa na kewaye da kuma kin jan ƙarfe.

2. Dalilan tsarin masana'antar laminate:

A karkashin yanayi na al'ada, idan dai laminate yana da zafi don matsawa fiye da minti 30, murfin jan karfe da prepreg za a hade su gaba daya, don haka latsawa gaba ɗaya ba zai shafi ƙarfin haɗin gwiwa na murfin tagulla da substrate a cikin laminate ba. . Duk da haka, a cikin tsari na stacking da stacking laminates, idan PP ya gurɓata ko kuma tagulla ta lalace, ƙarfin haɗin kai tsakanin foil na jan karfe da substrate bayan lamination zai zama ƙasa da ƙasa, wanda zai haifar da matsayi (kawai don manyan faranti) Kalmomi. ) ko kuma wayoyi na jan karfe na lokaci-lokaci suna faɗuwa, amma ƙarfin bawon tagulla kusa da kashe wayoyi ba zai zama na al'ada ba.

3. Dalilan laminate raw kayan:

1. Kamar yadda aka ambata a sama, talakawa electrolytic tagulla foils duk kayayyakin da aka yi galvanized ko tagulla-plated. Idan kololuwar ba ta da kyau a lokacin samar da gashin ulu, ko kuma lokacin galvanizing / jan karfe plating, rassan kristal plating ba su da kyau, yana haifar da bangon jan ƙarfe da kansa Ƙarfin peeling bai isa ba. Lokacin da mummunan foil ɗin da aka matse takarda ya zama PCB da toshe a cikin masana'antar lantarki, wayar jan ƙarfe za ta faɗi saboda tasirin ƙarfin waje. Irin wannan rashin kyamar jan ƙarfe ba zai haifar da ɓarna a fili ba bayan bare wayar tagulla don ganin ƙaƙƙarfan farfajiyar foil ɗin tagulla (wato, fuskar da aka haɗa tare da ma'aunin tagulla), amma ƙarfin bawo na gabaɗayan tagulla ba zai yi kyau ba. .

2. Rashin daidaituwa na jan karfe da guduro: wasu laminates tare da kaddarorin musamman, kamar zanen HTg, ana amfani da su yanzu saboda tsarin guduro daban-daban. Wakilin warkarwa da ake amfani da shi gabaɗaya guduro ne na PN, kuma tsarin sarkar kwayoyin guduro mai sauƙi ne. Matsayin ƙetare yana da ƙananan, kuma wajibi ne a yi amfani da foil na jan karfe tare da tsayi na musamman don daidaita shi. Lokacin samar da laminates, yin amfani da foil na jan karfe bai dace da tsarin guduro ba, wanda ke haifar da rashin isasshen ƙarfin kwasfa na foil ɗin ƙarfe mai sutura, da zubar da waya mara kyau lokacin sakawa.