Zane na Kwamitin PCB sau da yawa suna samun irin waɗannan matsalolin? Today I love the program network xiaobian recommended this article is engaged in PCB board design for many years of engineers, printed circuit board design experience to share with you. Barka da zuwa tattara!

Don samfuran lantarki, ƙirar allon PCB tsari ne na ƙira mai mahimmanci daga ƙirar ƙirar lantarki zuwa takamaiman samfurin, kuma ƙirar ƙirar tana da alaƙa da haɓaka samfur da ingancin samfur. Koyaya, ga mutane da yawa waɗanda kawai ke aikin ƙirar lantarki, ba su da ƙarancin ƙwarewa a wannan ɓangaren. Kodayake sun koyi software na ƙirar allon PCB, Amma ƙirar PCB galibi tana da wasu matsaloli. Injiniyan da Xiaobian ya ba da shawarar ya shafe shekaru da yawa yana ƙirar ƙirar hukumar PCB. Shi/ita za ta ba da kwarewar sa a cikin ƙirar hukumar kewayawar PRINTED tare da ku, da fatan za su taka rawa wajen yin bulo don jawo jan. Software na ƙirar PCB da injiniyan ya ba da shawarar shine TANGO a ‘yan shekarun da suka gabata, kuma yanzu yana amfani da PROTEL2.7 DON WINDOWS.

Tsarin PCB

Umurnin da aka saba sanyawa na abubuwan akan PCB:

1, sanya abubuwan da aka gyara tare da madaidaicin matsayi kusa da tsarin, kamar soket na wutar lantarki, hasken mai nuna alama, canzawa, mai haɗawa, da sauransu, ana sanya waɗannan abubuwan bayan aikin LOCK na software don LOCK shi, don kada ya kasance motsa bisa kuskure;

2, abubuwa na musamman da manyan abubuwan da aka sanya akan layi, kamar abubuwan dumama, transformers, IC, da sauransu;

3. Sanya ƙananan na’urori.

Nisa tsakanin bangaren da gefen PCB

Idan za ta yiwu, yakamata a sanya dukkan abubuwan a cikin 3mm daga gefen allon PCB ko aƙalla ya fi kaurin allon PCB. Wannan saboda a cikin yawan samar da plug-ins na layin taro da murɗawar igiyar ruwa, yakamata a ba shi zuwa ramin jagora don amfani. A lokaci guda, don hana lahani na gefen lalacewa ta hanyar sarrafa sifa, idan akwai abubuwa da yawa akan allon PCB, If you have to go beyond the 3mm range, you can add a 3mm auxiliary edge to the edge of the PCB board, and open a V-shaped slot on the auxiliary edge, which can be broken by hand during production.

Isolation between high and low pressure

Akwai madaidaicin madaidaiciyar wutar lantarki da ƙarancin wutar lantarki a lokaci guda akan allon PCB da yawa, yakamata a raba abubuwan haɗin babban ƙarfin wutar lantarki da ɓangaren ƙananan ƙarfin lantarki, kuma nisan keɓewa yana da alaƙa da ƙarfin juriya. A yadda aka saba, kwamitin PCB yakamata ya zama 2mm nesa da ƙarfin wutar lantarki a 2000kV, kuma yakamata a ƙara adadin sama da wannan, alal misali, idan gwajin ƙarfin juriya shine 3000V, Nisa tsakanin manyan layuka masu ƙarancin ƙarfi yakamata ya zama sama da 3.5mm, a lokuta da yawa don gujewa rarrafewa, amma kuma a cikin allon PCB tsakanin babban da ƙaramin ƙarfin wutar lantarki.

Kwamitin PCB

Tsarin shimfida masu bugawa yakamata ya zama ɗan gajeren lokaci, musamman a cikin madaidaitan madaidaiciya; Ya kamata a juya jujjuyawar waya da aka buga, kuma kusurwar dama ko Angle mai kaifi za ta shafi aikin lantarki a cikin yanayin madaidaicin mitar mita da yawa; When wiring two panels, the wires on both sides should be perpendicular, oblique, or bent to avoid parallel to each other to reduce parasitic coupling. Printed wires used as input and output of the circuit should be avoided parallel to each other as far as possible to avoid feedback. It is best to add grounding wires between these wires.

Nisa na waya da aka buga

Faɗin waya ya dace da buƙatun aikin lantarki kuma ya dace don samarwa. Ƙananan ƙimarsa ya dogara da girman na yanzu, amma mafi ƙarancin bai kamata ya zama ƙasa da 0.2mm ba. In high density, high precision printed lines, wire width and spacing is generally desirable 0.3mm; Ya kamata a yi la’akari da karuwar zafin waya na faɗin waya a yanayin babban halin yanzu. Gwajin guda ɗaya yana nuna cewa lokacin da kaurin murfin jan ƙarfe yake 50μm, faɗin waya shine 1 ~ 1.5mm kuma na yanzu shine 2A, hauhawar zafin jiki ƙanana ne. Sabili da haka, waya tare da faɗin 1 ~ 1.5mm na iya biyan buƙatun ƙira ba tare da haifar da hauhawar zafin jiki ba.

Wayoyin ƙasa na gama gari don masu bugawa masu bugawa yakamata su yi kauri sosai, ta amfani da layuka fiye da 2 zuwa 3mm idan ya yiwu, musamman a da’irori tare da microprocessors. Saboda layin gida yana da kyau sosai, saboda canjin kwararar yanzu, canjin canjin ƙasa, rashin daidaiton matakin siginar lokaci na microprocessor, zai haifar da lalacewar juriya; Za’a iya amfani da ƙa’idodin 10-10 da 12-12 lokacin da ake haɗawa tsakanin DIP kunshe fil IC, wato, lokacin da aka wuce wayoyi biyu tsakanin fil, za a iya saita diamin kushin zuwa 50mil, faɗin layi da tazarar layi shine 10mil, lokacin waya ɗaya kawai ake wucewa tsakanin fil, za a iya saita diamin kushin zuwa 64mil, faɗin layi da tazarar layi 12mil.

Tazarar wayoyin da aka buga

Tazara tsakanin wayoyin da ke kusa dole ne ya cika buƙatun amincin lantarki, kuma don dacewa da aiki da samarwa, yakamata tazara ta kasance mai faɗi sosai. Mafi karancin tazara dole ne ya zama aƙalla ya dace da ƙarfin da za a ci gaba da samu. Wannan ƙarfin lantarki gabaɗaya ya haɗa da wutar lantarki mai aiki, ƙarin ƙarfin juzu’in juzu’i da ƙwanƙolin ƙarfin da wasu dalilai ke haifarwa.

Idan yanayin fasaha ya ba da izinin wani mataki na ragowar ƙarfe tsakanin wayoyi, za a rage tazara. Don haka mai zanen yakamata yayi la’akari da wannan abin yayin la’akari da ƙarfin lantarki. Lokacin da ƙarancin wayoyi ya yi ƙasa, nisan layin siginar na iya ƙaruwa yadda yakamata, layin siginar tare da babban banbanci na babban, ƙaramin matakin yakamata ya zama gajarta gwargwadon iko kuma ya ƙara tazara.

Garkuwa da kasa da buga wayoyi

Za a shirya waya ta ƙasa ta wayar da aka buga a gefen allon da’irar da aka buga gwargwadon iko. Ya kamata a adana takardar jan ƙarfe da yawa a matsayin waya ta ƙasa a kan jirgin PCB, don tasirin garkuwar ya fi doguwar waya ta ƙasa ƙarfi, za a inganta halayen layin watsawa da tasirin garkuwar, sannan kuma su taka rawa wajen rage ƙarfin rarraba. Wayar ƙasa ta waya da aka buga ta fi dacewa don samar da madauki ko cibiyar sadarwa, saboda lokacin da akwai madaidaitan da’irori a kan jirgi ɗaya, musamman lokacin da aka sami abubuwan da ke cinye ƙarin ƙarfi, iyakance akan jadawali yana haifar da bambancin bambancin ƙasa. yana haifar da raguwar haƙurin hayaniya, lokacin da ya zama madauki, ana rage raguwar yuwuwar tushe.

Bugu da ƙari, ƙirar ƙasa da wutar lantarki yakamata ta kasance daidai da madaidaicin bayanin kwararar bayanai gwargwadon iko, wanda shine sirrin haɓaka ikon murƙushe amo; Kwamitin PCB na Multilayer na iya ɗaukar yadudduka da yawa azaman garkuwar garkuwa, Layer samar da wutar lantarki, za a iya ɗaukar matakin ƙasa azaman garkuwar garkuwar ƙasa, ƙirar ƙasa gabaɗaya da ƙirar wutar lantarki an tsara su a cikin sashin ciki na allon PCB mai yawa, layin siginar ƙirar layin ciki da Layer na waje.