Menene Silkscreen A PCB?
Lokacin da kuka tsara ko odar ku buga allon kewayawa , Kuna buƙatar ƙarin biyan kuɗin siliki?Akwai wasu tambayoyi da kuke buƙatar sanin menene allon siliki?Kuma yadda mahimmancin siliki yake a cikin ku PCB Board ƙirƙira ko Buga Majalisa Majalisar Da'ira ?Yanzu ABIS zai yi muku bayani.
Menene siliki?
Silkscreen wani nau'i ne na alamun tawada da ake amfani da su don gano abubuwan da aka gyara, wuraren gwaji, sassan PCB, alamun gargadi, tambura da alamomi da dai sauransu. Wannan siliki yawanci ana amfani da shi a gefen bangaren;duk da haka yin amfani da siliki a gefen solder shima ba sabon abu bane.Amma wannan na iya ƙara farashin.Mahimmanci cikakken siliki na PCB na iya taimaka wa masana'anta da injiniyoyi don ganowa da gano duk abubuwan haɗin gwiwa.
Tawada tawadan epoxy ce wacce ba ta da iko.An tsara tawada da ake amfani da ita don waɗannan alamomin sosai.Madaidaitan launukan da muke gani akai-akai sune baki, fari da rawaya.Software na PCB kuma yana amfani da daidaitattun haruffa a cikin siliki na siliki amma zaka iya zaɓar wasu nau'ikan rubutu daga tsarin kuma.Don nunin siliki na gargajiya kuna buƙatar allon polyester wanda aka shimfiɗa akan firam ɗin aluminium, mai ɗaukar hoto na Laser, mai haɓaka feshi da tanda.
Menene zai shafi siliki?
Dankowa: Dankowa yana nufin motsin dangi tsakanin yadudduka na ruwa kusa da lokacin da ruwan ke gudana, sannan za a haifar da juriya mai juriya tsakanin ruwan ruwa biyu;naúrar: Pascal seconds (pa.s).
Tauri: Taurin tawada bayan an gama yin burodi shine 2B, taurin tawada bayan bayyanar shine 2H, taurin tawada bayan yin burodin shine 6H.Taurin fenti. Thixotropic: tawada shine gelatinous lokacin da yake tsaye, amma danko yana canzawa lokacin da aka taɓa shi, wanda kuma aka sani da thixotropic, anti-sagging;wani abu ne na zahiri na ruwa, wato a yanayin motsa jikin sa yana faɗuwa, kuma yana saurin dawo da halayen ɗanƙoƙinsa na asali bayan an bar shi ya tsaya.Ta hanyar motsawa, tasirin thixotropy yana dadewa na dogon lokaci, isa ya sake gina tsarin ciki.Don cimma sakamakon bugu na allo mai inganci, thixotropy na tawada yana da mahimmanci.Musamman a cikin aikin squeegee, tawada yana tayar da hankali don sanya shi ruwa.Wannan tasirin yana haɓaka saurin tawada da ke wucewa ta raga, kuma yana haɓaka haɗin kai ɗaya na tawada da ragar ya raba.Da zarar squeegee ya daina motsi, tawada zai dawo a tsaye, kuma dankowar sa yana dawowa da sauri zuwa ainihin bayanan da ake buƙata. Busasshen fim: Tsarin fim mai bushe:
Dry film ya ƙunshi sassa uku da sinadaran:
Fim ɗin tallafi (fim ɗin polyester, Polyester)
Busashen Fim mai juriya
Rufin fim (fim ɗin polyethylene, polyethylene)
Babban sinadaran
① Binder mai ɗaure (guro mai ƙirƙirar fim),
②Photo-polymerization monomer monomer,
③Mai ƙaddamar da Hoto,
④ Filastik,
⑤Adhesion Promoter,
⑥ thermal polymerization inhibitor,
⑦Pigment Dye,
⑧ ƙarfi
Nau'in fim ɗin busassun sun kasu kashi uku bisa ga busassun ci gaban fim da hanyoyin kawar da su: busasshen fim mai narkewa mai narkewa, busasshen fim mai narkewa da ruwa da fim mai bushewa;bisa ga manufar busasshen fim ɗin, an raba shi zuwa: tsayayya da fim ɗin bushewa, fim ɗin busasshen rufe fuska da Solder mask bushe fim.
Matsakaicin saurin hankali: yana nufin adadin kuzarin hasken da ake buƙata don photoresist don yin polymerize da photoresis don samar da polymer tare da wani juriya don tsayayya a ƙarƙashin hasken ultraviolet, a ƙarƙashin yanayin ƙayyadaddun ƙarfin tushen hasken haske da nisan fitila, saurin hankali shine wanda aka bayyana azaman tsayin lokacin fallasa, gajeriyar lokacin fallasa yana nufin saurin azanci.
Resolution: yana nufin adadin layuka (ko tazara) waɗanda za a iya kafa ta busassun fim ɗin tsayayya a cikin nisa na 1mm.Hakanan za'a iya bayyana ƙuduri ta cikakken girman layin (ko tazarar).
Net yarn:
Yawan Net:
Lambar T: tana nufin adadin meshes tsakanin tsayin 1 cm.
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