A. PCB factory tsari dalilai
1. Yawan etching na tagulla
Bakin jan ƙarfe na electrolytic da ake amfani da shi a kasuwa gabaɗaya galvanized ne mai gefe guda (wanda akafi sani da ashing foil) da plating na jan ƙarfe mai gefe guda (wanda akafi sani da ja. Bakin tagulla na yau da kullun shine galvanized foil jan karfe sama da 70um, ja da 18um. Fail ɗin toka mai zuwa yana da asali batch jan ƙarfe ƙin yarda da shi. Lokacin da tsarin kewayawa ya fi layin etching, idan ƙayyadaddun bayanan tagulla ya canza amma sigogin etching ba su canza ba, wannan zai sa foil ɗin jan ƙarfe ya tsaya a cikin maganin etching ya daɗe.
Saboda asalin zinc shine ƙarfe mai aiki, lokacin da wayar tagulla akan PCB ta jiƙa a cikin maganin etching na dogon lokaci, zai haifar da lalata layin da ya wuce kima, yana haifar da wani ɗan ƙaramin layi mai goyan bayan zinc Layer gaba ɗaya kuma ya rabu da shi. substrate, wato Wayar tagulla ta faɗo.
Wani yanayi kuma shi ne cewa babu matsala tare da sigogin etching na PCB, amma wankewa da bushewa ba su da kyau bayan etching, yana sa wayar tagulla ta kewaye ta da ragowar etching a saman PCB. Idan ba a sarrafa shi na dogon lokaci, zai kuma haifar da wuce gona da iri na waya ta gefe da ƙin yarda. jan karfe.
Wannan yanayin gabaɗaya yana mai da hankali kan layukan bakin ciki, ko kuma lokacin da yanayi yake da ɗanshi, lahani iri ɗaya zai bayyana akan PCB gabaɗaya. Cire wayar tagulla don ganin kalar fuskar da ke hulɗa da ita tare da tushe (abin da ake kira roughened surface) ya canza, wanda ya bambanta da tagulla na al'ada. Launin tsare ya bambanta. Abin da kuke gani shine asalin launin jan ƙarfe na Layer na ƙasa, kuma ƙarfin bawon tagulla a layin mai kauri shima al'ada ne.
2. Wani karo na gida ya faru a cikin tsarin samar da PCB, kuma an raba wayar tagulla daga substrate ta ƙarfin waje na inji.
Wannan mummunan aikin yana da matsala tare da matsayi, kuma wayar tagulla za ta kasance a fili ta karkace, ko tabo ko alamun tasiri a cikin hanya guda. Cire wayar tagulla a ɓangaren da ba ta da lahani kuma ku dubi ƙaƙƙarfan fuskar tagulla, za ku ga cewa launi mai laushi na murfin jan ƙarfe ne na al'ada, ba za a sami lalatawar gefe ba, da kuma ƙarfin peeling. foil ɗin jan ƙarfe ne na al'ada.
3. Tsarin kewaye na PCB mara ma'ana
Zana siraran da'irori mai kauri mai kauri na jan karfe zai kuma haifar da wuce gona da iri na kewaye da zubar da tagulla.
B.Dalilin tsarin laminate
A karkashin yanayi na al'ada, jakar tagulla da prepreg za a haɗa su gaba ɗaya idan dai babban ɓangaren zafin jiki na laminate yana da zafi sama da mintuna 30, don haka latsawa gabaɗaya ba zai shafi ƙarfin haɗin gwiwa na bangon jan karfe da substrate a cikin laminate. Duk da haka, a cikin aiwatar da stacking da stacking laminates, idan PP gurbatawa ko jan karfe tsare m surface lalacewa, shi ma zai haifar da rashin isasshen bonding karfi tsakanin jan karfe da kuma substrate bayan lamination, haifar da matsayi sabawa (kawai ga manyan faranti) ) Ko sporadic wayoyi na jan karfe sun fadi, amma karfin kwasfa na foil na jan karfe kusa da layin da ba na al'ada ba ne.
C. Dalilan laminate albarkatun kasa:
1. Kamar yadda aka ambata a sama, talakawa electrolytic tagulla foils ne duk kayayyakin da aka yi galvanized ko tagulla-plated a kan ulu foil. Idan kololuwar ƙimar ulun ulu ba ta da kyau a lokacin samarwa, ko kuma lokacin da ake yin galvanizing / jan ƙarfe, rassan kristal plating ba su da kyau, yana haifar da bangon jan ƙarfe da kansa Ƙarfin peeling bai isa ba. Bayan da mummunan foil ɗin da aka matse takarda ya zama PCB, wayar tagulla za ta faɗi saboda tasirin ƙarfin waje lokacin da yake toshe cikin masana'antar lantarki. Irin wannan mummunan rashin amincewar jan ƙarfe ba zai sami gurɓatawar gefe ba yayin da ake kwasar wayar tagulla don ganin ƙaƙƙarfan farfajiyar tagulla (wato, farfajiyar lamba tare da substrate), amma ƙarfin kwasfa na dukkan bangon tagulla zai kasance sosai. matalauci.
2. Rashin daidaituwa na jan karfe da guduro: Wasu laminates da ke da kaddarorin musamman, irin su HTG, ana amfani da su yanzu, saboda tsarin guduro ya bambanta, wakili mai warkarwa da ake amfani da shi gabaɗaya guduro PN ne, kuma tsarin sarkar guduro yana da sauƙi. Matsayin ƙetare yana da ƙananan, kuma wajibi ne a yi amfani da foil na jan karfe tare da tsayi na musamman don daidaita shi. Bakin jan karfe da ake amfani da shi wajen samar da laminai bai dace da tsarin guduro ba, wanda ke haifar da rashin isasshen ƙarfin kwasfa na foil ɗin ƙarfe da aka lulluɓe, da zubar da waya mara kyau lokacin sakawa.