Akwai yankuna da yawa a cikiPCB zaneinda ake buƙatar la'akari da tazara mai aminci.Anan, an kasafta shi na ɗan lokaci zuwa nau'i biyu: ɗaya shine tazarar aminci da ke da alaƙa da lantarki, ɗayan kuma tazarar aminci ce wacce ba ta da alaƙa da lantarki.
Tazarar aminci mai alaƙa da lantarki
1.Tazara tsakanin wayoyi
Har zuwa iya aiki na al'adaPCB masana'antunabin damuwa, mafi ƙarancin tazara tsakanin wayoyi bazai ƙasa da mil 4 ba.Mafi ƙarancin tazarar waya shine kuma nisa daga waya zuwa waya da waya zuwa pad.Daga hangen nesa na samarwa, mafi girma shine mafi kyau idan zai yiwu, kuma 10mil shine na kowa.
2.Pad budewa da kushin nisa
Dangane da karfin sarrafawa na masana'antun PCB na yau da kullun, buɗaɗɗen kushin bai kamata ya zama ƙasa da 0.2mm ba idan an haƙa shi da injiniyanci, kuma 4mil idan na'urar hakowa ta Laser ce.Haƙurin buɗewa ya ɗan bambanta bisa ga farantin, gabaɗaya ana iya sarrafa shi a cikin 0.05mm, ƙaramin nisa na kushin kada ya zama ƙasa da 0.2mm.
3.Tazara tsakanin pad
Dangane da ƙarfin sarrafawa na masana'antun PCB na yau da kullun, tazara tsakanin pads bazai zama ƙasa da 0.2mm ba.
4.Nisa tsakanin jan karfe da farantin karfe
Tazarar tsakanin fatar tagulla da aka caje da gefenPCB allonya kamata ba kasa da 0.3mm.A kan shafi na Zane-Dokokin-Board, saita ƙa'idar tazarar wannan abu.
Idan an shimfiɗa babban yanki na jan karfe, yawanci akwai nisa tsakanin farantin da gefen, wanda yawanci ana saita shi zuwa 20mil.A cikin PCB zane da masana'antu masana'antu, a karkashin al'ada yanayi, saboda da inji la'akari da ƙãre kewaye hukumar, ko don kauce wa jan karfe fata fallasa a gefen hukumar na iya haifar da gefen mirgina ko lantarki gajeren kewaye, injiniyoyi za su sau da yawa yada wani babban yanki na toshe tagulla dangane da gefen allo yana raguwa 20mil, maimakon fatar tagulla da aka yada zuwa gefen allon.
Ana iya sarrafa wannan tagulla ta hanyoyi daban-daban, kamar zana shimfidar wuri a gefen farantin, sannan saita tazara tsakanin jan karfe da wurin ajiyewa.An gabatar da hanya mai sauƙi a nan, wato, an saita nisa daban-daban na tsaro don abubuwan da ke shimfiɗa tagulla.Misali, an saita tazarar aminci na dukkan allon zuwa 10mil, kuma an saita shimfidar tagulla zuwa 20mil, wanda zai iya cimma tasirin raguwar 20mil a cikin gefen allo kuma ya kawar da yuwuwar mataccen jan ƙarfe a cikin na'urar.
Tazarar aminci mara amfani da wutar lantarki
1. Faɗin hali, tsawo da tazara
Ba za a iya yin canje-canje a cikin sarrafa fim ɗin rubutu ba, amma faɗin layin haruffan da ke ƙasa da 0.22mm (8.66mil) a cikin D-CODE yakamata a yi ƙarfin gwiwa zuwa 0.22mm, wato, faɗin layin layin. haruffa L = 0.22mm (8.66mil).
Nisa duka shine W = 1.0mm, tsayin dukkan halayen shine H = 1.2mm, kuma tazara tsakanin haruffa shine D = 0.2mm.Lokacin da rubutun ya yi ƙasa da ma'auni na sama, za a yi duhu da sarrafa bugu.
2.Tazara tsakanin Vias
Ramin ramin (VIA) zuwa tazarar ramuka (gefi zuwa gefe) yakamata ya fi 8mil.
3.Distance daga buga allo zuwa kushin
Ba a yarda bugu allo ya rufe kushin ba.Domin idan an rufe allon bugu da pad ɗin solder, ba za a buga allo a kan tin ba lokacin da tin ɗin ke kunne, wanda hakan zai shafi hawan abubuwan.Babban masana'antar hukumar yana buƙatar a tanadi tazarar mil 8 shima.Idan allon PCB yana iyakance a cikin yanki, tazarar mil 4 da kyar ake karɓa.Idan an lullube bugu na allo akan kushin da gangan yayin ƙira, masana'antar farantin za ta kawar da bugu ta atomatik a kan kushin yayin masana'anta don tabbatar da tin akan kushin.
Tabbas, hanya ce ta kowane hali a lokacin ƙira.Wani lokaci da gangan bugu na allo ake ajiyewa kusa da kushin, saboda lokacin da pads biyu suna kusa da juna, allon allon da ke tsakiyar zai iya hana haɗin haɗin siyar da kyau yayin walda, wanda shine wani akwati.
4.Mechanical 3D tsawo da kuma kwance tazara
Lokacin shigar da abubuwan da aka gyara akanPCB, Wajibi ne a yi la'akari da ko jagorar kwance da tsayin sararin samaniya zai yi rikici da sauran tsarin injiniya.Saboda haka, a cikin ƙira, ya kamata mu yi la'akari da daidaituwa tsakanin sassan, tsakanin PCB ƙãre kayayyakin da samfurin harsashi, da sarari tsarin, da kuma ajiye lafiya tazara ga kowane manufa abu don tabbatar da cewa babu wani rikici a sarari.
