Xa ukwenza iPCB indlela, ngenxa yomsebenzi wokuhlalutya kwangaphambili awenziwanga okanye awenziwanga, i-post-processing inzima.Ukuba ibhodi PCB ithelekiswa kwisixeko sethu, amacandelo zifana umqolo phezu komqolo zonke iintlobo zezakhiwo, imigca uphawu izitrato kunye neendledlana esixekweni, flyover roundabout siqithi, ukuvela indlela nganye isicwangciso yayo eneenkcukacha, iingcingo nazo. enjalo.
1. Iimfuno eziphambili zocingo
A) Imigca yeempawu eziphambili zikhethwayo: ukunikezelwa kwamandla, isignali encinci ye-analog, isignali yesantya esiphezulu, isignali yewashi, isignali yokuvumelanisa kunye nezinye iimpawu eziphambili zikhethwayo.
B) Umgaqo-siseko woxinano lwe-Wiring: Qala i-wiring ukusuka kwicandelo kunye nobudlelwane obunzima kakhulu bokudibanisa ebhodini.Ikhewubhuli iqala kweyona ndawo ixineneyo ebhodini.
C) Izilumkiso zokulungiswa kweempawu eziphambili: zama ukubonelela ngoluhlu olukhethekileyo lwe-wiring kwiimpawu eziphambili ezifana nesignali yewashi, i-high-frequency signal kunye nesignali ebucayi, kwaye uqinisekise indawo encinci ye-loop.Ukuba kuyimfuneko, ukhuselo kunye nokwandiswa kwezithuba zokhuseleko kufuneka zamkelwe.Qinisekisa umgangatho wophawu.
D) Uthungelwano oluneemfuno zolawulo lwe-impedance luya kulungelelaniswa kwinqanaba lokulawula i-impedance, kwaye ulwahlulo lwayo lwesignali luya kugwenywa.
2.Wiring scrambler ulawulo
A) Ukutolikwa komgaqo we-3W
Umgama phakathi kwemigca kufuneka ube ngamaxesha ama-3 ububanzi bomgca.Ukunciphisa i-crosstalk phakathi kwemigca, isithuba somgca kufuneka sibe sikhulu ngokwaneleyo.Ukuba umgama weziko lomgca awukho ngaphantsi kwamaxesha ama-3 ububanzi bomgca, i-70% yendawo yombane phakathi kwemigca ingagcinwa ngaphandle kokuphazamiseka, okubizwa ngokuba ngumthetho we-3W.
B) Ukulawulwa kwe-Tampering: I-CrossTalk ibhekisela kukuphazamiseka okufanayo phakathi kwamanethiwekhi ahlukeneyo kwi-PCB okubangelwa i-wiring emide ehambelanayo, ngokukodwa ngenxa yesenzo sokusasazwa kwe-capacitance kunye nokusabalalisa i-inductance phakathi kwemigca ehambelanayo.Amanyathelo aphambili okoyisa i-crosstalk ngala:
I. Yandisa izithuba zeekhebhile ezinxuseneyo kwaye ulandele umthetho we-3W;
Ii.Faka iintambo zokwahlula emhlabeni phakathi kweentambo ezinxuseneyo
Iii.Nciphisa umgama phakathi kwe-cabling layer kunye ne-plane yomhlaba.
3. Imigaqo ngokubanzi yeemfuno zocingo
A) Isalathiso senqwelo-moya esecaleni si-orthogonal.Kuthintele imigca yemiqondiso eyahlukeneyo kumaleko asecaleni kwicala elinye ukunciphisa ukuphazamisa okungafunekiyo kwe-inter-layer;Ukuba le meko inzima ukuyiphepha ngenxa yokulinganiselwa kwesakhiwo sebhodi (njengezinye iinqwelomoya), ngakumbi xa isantya somqondiso siphezulu, kufuneka ucinge ngokuhlukanisa iileyile ze-wiring kwi-plane yomhlaba kunye neentambo zesignali emhlabeni.
B) Ukudityaniswa kweengcingo zezixhobo ezincinci ezidityanisiweyo kufuneka zilingane, kwaye i-SMT pad ehamba phambili enezithuba ezikufutshane kufuneka iqhagamshelwe ngaphandle kwepadi.Uxhulumaniso oluthe ngqo phakathi kwepadi aluvumelekanga.
C) Ubuncinci bomgaqo we-loop, oko kukuthi, indawo ye-loop eyenziwe ngumgca wesignali kunye ne-loop yayo kufuneka ibe yincinci kangangoko kunokwenzeka.Incinci indawo ye-loop, iyancipha i-radiation yangaphandle kunye nokuphazamiseka kwangaphandle.
D) Iintambo ze-STUB azivumelekanga
E) Ububanzi bocingo bothungelwano olufanayo kufuneka bugcinwe bufana.Ukwahluka kobubanzi be-wiring kuya kubangela ukungahambi kakuhle kweempawu zomgca.Xa isantya sothumelo siphezulu, ukubonakalisa kuya kwenzeka.Phantsi kwezinye iimeko, ezifana isinxibelelanisi wire lead, BGA iphakheji lead ngocingo isakhiwo efanayo, ngenxa isithuba esincinane akanako ukunqanda utshintsho ububanzi bomgca, kufuneka sizame ukunciphisa ubude obusebenzayo inxalenye phakathi ezingangqinelaniyo.
F) Thintela iintambo zomqondiso ekuzenzeleni iilophu phakathi kweeleya ezahlukeneyo.Olu hlobo lwengxaki lulula ukwenzeka kuyilo lwamacwecwe amaninzi, kwaye i-self-loop iya kubangela ukuphazamiseka kwemitha.
G) I-engile ebukhali kunye ne-engile yasekunene kufuneka ithintelwe kuyoUyilo lwePCB, okukhokelela kwimitha engadingekile, kunye nokusebenza kwenkqubo yemvelisoPCBayilunganga.
