Baningi onjiniyela abangenalwazi embonini yezogesi.Amabhodi e-PCB aklanyelwe avame ukuba nezinkinga ezihlukahlukene ngenxa yokunganaki ukuhlola okuthile esigabeni sakamuva somklamo, njengobubanzi obunganele bomugqa, ingxenye yelebula yokuphrinta isikrini sikasilika ku- via hole, isokhethi Ivaleke kakhulu, izihibe zesignali, njll. Ngenxa yalokho. , izinkinga zikagesi noma izinkinga zenqubo zibangelwa, futhi ezimweni ezimbi kakhulu, ibhodi lidinga ukuphrinta kabusha, okuholela ekulahlekeni.Esinye sezinyathelo ezibaluleke kakhulu esigabeni sakamuva somklamo we-PCB ukuhlola.
Kunemininingwane eminingi ekuhlolweni kwangemuva kokuklanywa kwebhodi le-PCB:
1. Ukupakishwa kwengxenye
(1) Isikhala sephedi
Uma kuyidivayisi entsha, kufanele udwebe iphakheji yengxenye ngokwakho ukuze uqinisekise isikhala esifanele.Isikhala sephedi sithinta ngqo ukuhlanganiswa kwezingxenye.
(2) Ngosayizi (uma ukhona)
Kumadivayisi e-plug-in, usayizi we-via hole kufanele ube nemajini eyanele, futhi kufanelekile ukugodla okungengaphansi kuka-0.2mm.
(3) Hlela ukuphrinta kwesikrini sikasilika
Ukuphrinta kwesikrini sohlaka lwedivayisi kungcono kunosayizi wangempela ukuze kuqinisekiswe ukuthi idivayisi ingafakwa kahle.
2. Isakhiwo sebhodi le-PCB
(1) I-IC akufanele isondele emaphethelweni ebhodi.
(2) Amadivayisi wesekethe yemojuli efanayo kufanele abekwe eduze komunye nomunye
Isibonelo, i-decoupling capacitor kufanele ibe seduze nephinikhodi yokunikeza amandla ye-IC, futhi amadivayisi akha isifunda esifanayo sokusebenza kufanele abekwe endaweni eyodwa kuqala, enezendlalelo ezicacile zokuqinisekisa ukugcwaliseka komsebenzi.
(3) Hlela indawo yesokhethi ngokusho kokufakwa kwangempela
Amasokhethi wonke aholelwa kwamanye amamojula.Ngokusho kwesakhiwo sangempela, ukuze kube lula ukufakwa, isimiso sokusondeza ngokuvamile sisetshenziselwa ukuhlela isikhundla sesokhethi, futhi ngokuvamile siseduze nomkhawulo webhodi.
(4) Naka isiqondiso sesokhethi
Amasokhethi wonke aqondise, uma isiqondiso sibuyiselwa emuva, ucingo kuzodingeka lwenziwe ngokwezifiso.Kumasokhethi ayisicaba, isiqondiso sesokhethi kufanele sibheke ngaphandle kwebhodi.
(5) Akufanele kube nezisetshenziswa endaweni ye-Keep Out
(6) Umthombo wokuphazamiseka kufanele ugcinwe kude namasekhethi azwelayo
Amasignali anesivinini esikhulu, amawashi anesivinini esiphezulu noma amasiginali ashintshashintshayo amanje konke kuyimithombo yokuphazamiseka futhi kufanele agcinwe kude namasekhethi azwelayo, njengamasekhethi okusetha kabusha namasekhethi e-analog.Iphansi lingasetshenziswa ukuzehlukanisa.
3. PCB izintambo zebhodi
(1) Usayizi wobubanzi bomugqa
Ububanzi bomugqa kufanele bukhethwe ngokuya ngenqubo namandla okuthwala amanje.Ububanzi bomugqa omncane abukwazi ukuba buncane kunobubanzi bomugqa omncane womkhiqizi webhodi le-PCB.Ngesikhathi esifanayo, umthamo wamanje wokuthwala uqinisekisiwe, futhi ububanzi bomugqa ofanelekile ngokuvamile bukhethwa ku-1mm/A.
(2) Umugqa wesignali ohlukile
Ngemigqa ehlukanisayo efana ne-USB ne-Ethernet, qaphela ukuthi ukulandelelwa kufanele kube ubude obulinganayo, kuhambisane, futhi kundiza efanayo, futhi isikhala sinqunywa i-impedance.
(3) Naka indlela ebuyayo yemigqa enesivinini esikhulu
Imigqa enesivinini esikhulu ijwayele ukukhiqiza imisebe ye-electromagnetic.Uma indawo eyakhiwe umzila kanye nendlela yokubuya inkulu kakhulu, izokwakhiwa ikhoyili eyodwa ukuze ikhiphe ukuphazamiseka kukazibuthe kagesi, njengoba kuboniswe kuMfanekiso 1. Ngakho-ke, lapho uhambisa umzila, qaphela indlela yokubuyela eduze kwayo.Ibhodi le-multi-layer linikezwa uhlaka lwamandla kanye nendiza ephansi, engaxazulula le nkinga ngokuphumelelayo.
(4) Naka umugqa wesiginali ye-analog
Ulayini wesiginali ye-analogi kufanele uhlukaniswe kusiginali yedijithali, futhi izintambo kufanele zigwenywe kude ngangokunokwenzeka emthonjeni wokuphazamiseka (njengewashi, ukunikezwa kwamandla kagesi e-DC-DC), futhi izintambo kufanele zibe zifushane ngangokunokwenzeka.
4. Ukuhambelana kwe-Electromagnetic (EMC) nobuqotho besignali yamabhodi e-PCB
(1) Ukumelana nokunqanyulwa
Ngemigqa yesivinini esiphezulu noma imigqa yesignali yedijithali enemvamisa ephezulu kanye nemigqa emide, kungcono ukubeka isiphikisano esifanayo ochungechungeni ekugcineni.
(2) Ulayini wesignali wokufaka uxhunywe ngokuhambisana ne-capacitor encane
Kungcono ukuxhuma okokufaka komugqa wesignali kusuka kusixhumi esibonakalayo eduze kwesixhumi esibonakalayo bese uxhuma i-picofarad capacitor encane.Ubukhulu be-capacitor bunqunywa ngokwamandla kanye nemvamisa yesignali, futhi akufanele ibe nkulu kakhulu, ngaphandle kwalokho ubuqotho besignali buzothinteka.Kumasiginali wokufaka wesivinini esiphansi, njengokufakwa kokhiye, i-capacitor encane engu-330pF ingasetshenziswa, njengoba kukhonjisiwe kuMfanekiso 2.
Umfanekiso 2: PCB board design_input line signal exhunywe ku-capacitor encane
Umfanekiso 2: PCB board design_input line signal exhunywe ku-capacitor encane
(3) Ikhono lokushayela
Isibonelo, isignali yokushintsha enomshini omkhulu wokushayela ingaqhutshwa yi-triode;ebhasini elinenani elikhulu lama-fan-outs, i-buffer ingengezwa.
5. Ukuphrinta isikrini sebhodi le-PCB
(1) Igama lebhodi, isikhathi, ikhodi ye-PN
(2) Ukulebula
Maka izikhonkwane noma amasiginali okhiye wezinye izixhumi ezibonakalayo (njengamalungu afanayo).
(3) Ilebula yengxenye
Amalebula ezingxenye kufanele abekwe ezindaweni ezifanele, futhi amalebula ezingxenye eziminyene angabekwa ngamaqembu.Qaphela ukuthi ungayibeki endaweni ye-via.
6. Maka iphuzu lebhodi le-PCB
Kumabhodi e-PCB adinga ukusoda komshini, amaphuzu kaMark amabili kuya kwamathathu adinga ukungezwa.
Isikhathi sokuthumela: Aug-11-2022