Amabhodi wesekethe aphrintiwe akha umgogodla wazo zonke izinto zikagesi zesimanje, enikeza ukusekelwa kwemishini kanye nokuxhumana kukagesi ezingxenyeni ezisukela kuma-resistor alula kuya kuma-microprocessor ayinkimbinkimbi. Isifunda se-PCB sinemizila yethusi eqoshwe phezu kwesisekelo esingaqhubi ugesi, idala izindlela ezinika amandla ukuthi amasignali kagesi ahambe phakathi kwezingxenye ngokunemba nangokuthembeka. Le mizila ixhunywa ngezimbobo ezibizwa ngama-vias, okuyizimbobo ezinensimbi ezinika amandla ukudluliswa kwesignali phakathi kwezingqimba ezahlukene zebhodi, kuyilapho ama-pads esebenza njengezindawo zokufaka lapho izingxenye zihlanganiswa khona ngensimbi. Ukuklanywa kwesifunda se-PCB kufanele kucatshangelwe izici ezinjengomthamo wokuthwala ugesi, ubuqotho besignali, kanye nokukhipha ukushisa ukuze kuqinisekiswe ukusebenza kahle nokuphila isikhathi eside. Isibonelo, isifunda se-LED esilula sidinga imizila embalwa kuphela exhuma i-LED ku-resistor elawula ugesi kanye nomthombo wamandla, kodwa izimiso ezifanayo ziyakhula zibe ngamabhodi ayizingqimba eziningi ayinkimbinkimbi asetshenziswa ezinhlelweni zekhompyutha eziphambili. Onjiniyela kufanele babheke i-parasitic capacitance ne-inductance eba nokubaluleka okukhulu emazingeni aphezulu, okwenza izinqumo zokuhlela zibe nokubaluleka ekusebenzeni kwesifunda sonkana.

Izakhiwo zomjikelezo ku-PCB zingahlukaniswa ngokubanzi zibe izingxenye ezisebenzayo nezingasebenzi, ngasinye sidlala indima ehlukile ekusebenzeni kwesistimu yonke. Izingxenye ezisebenzayo, njengamasekhethi ahlanganisiwe nama-transistor, zidinga umthombo wamandla wangaphandle ukuze zisebenze futhi zingakhulisa noma zishintshe amasignali kagesi, okwenza zibaluleke emisebenzini yokucubungula nokulawula. Izingxenye ezingasebenzi, ezihlanganisa ama-resistor, ama-capacitor, nama-inductor, azidingi amandla angaphandle futhi zisetshenziselwa imisebenzi efana nokuhlunga, ukugcina amandla, nokuhlukanisa amandla kagesi. Inqubo yokuklama i-PCB iqala ngokuthwebula umdwebo womjikelezo, lapho onjiniyela bechaza khona ukuxhumana kagesi kwazo zonke izingxenye, kulandele ukuklama ukuhlelwa okubandakanya ukubeka izingxenye nokuhambisa imizila ngokwemithetho yokuklama. Ukuhlolwa okuphelele kwemithetho yokuklama (DRC) kwenziwa ukuze kuqinisekiswe ukuthi ukuhlelwa kuhambisana nezidingo zokukhiqiza nezidingo zikagesi, kuqinisekiswe ukuthi ibhodi lokugcina lizosebenza njengoba kuhloswe ngaphandle kwezifinyezo ezimfushane noma izinkinga zobuqotho besignali. Ukuhlaziywa kobuqotho besignali sekubaluleke kakhulu njengoba ijubane lewashi likhuphuka futhi amazinga emaphetheloni ashesha emiklameni yesimanje yedijithali.

Ukhetho lwezinto ezisetshenziswayo lunomthelela omkhulu ekusebenzeni nasekuthembekeni kwamasekhethi e-PCB, lapho izinto ezingaphansi zikhethwa ngokusekelwe ezidingweni ezithile zikagesi nezemishini zohlelo lokusebenza. I-FR-4, i-glass-reinforced epoxy laminate, iyona esetshenziswa kakhulu ngenxa yokulinganisela kwayo okuhle kwezindleko, amandla emishini, kanye nezakhiwo zokuvikela ugesi ezidingekayo ezinhlelweni ezijwayelekile. Emasekhethini anemvamisa ephezulu asebenza ngaphezu kwe-1 GHz, kuncanyelwa ama-laminates akhethekile afana ne-Rogers noma izinto ezisekelwe ku-Teflon ngoba anikeza ukulahlekelwa okuncane kwe-dielectric kanye nezici ze-impedance ezinzile ezibalulekile ekugcineni ikhwalithi yesignali. Izinto ezingaphansi ze-polyimide eziguquguqukayo zisetshenziswa ezinhlelweni ezidinga ukugoba noma ukunyakaza okuguquguqukayo, njenge-wearable electronics kanye ne-foldable devices, lapho amabhodi aqinile ajwayelekile engasebenzi khona. Isisindo sethusi, esikalwa ngama-ounces nge-square foot ngayinye, sinquma amandla okuthwala amandla kagesi emikhondweni, kuyilapho izinto zokugqiba ezingaphezulu ezifana ne-HASL (Hot Air Solder Leveling), i-ENIG (Electroless Nickel Immersion Gold), ne-OSP (Organic Solderability Preservative) zivikela ithusi ekugqwaleni futhi ziqinisekise ukuthi i-solderability ithembekile. Ukugqiba okungaphezulu ngakunye kunikeza izinzuzo ezihlukile: i-ENIG inikeza ukuba yisicaba okuhle kakhulu ezingxenyeni ezinama-fine-pitch, i-HASL inikeza i-solderability enezindleko eziphansi, kanti i-OSP inikeza indawo eyisicaba efanele izinqubo ze-lead-free soldering, okunikeza abaklami ukuguquguquka ngokusekelwe ezidingweni zabo zokukhiqiza.

Ukuqonda izinhlobo eziyisisekelo zamasekhethi kubalulekile ekwakheni ama-PCB layouts asebenzayo ahambisana nezidingo eziqondile zohlelo ngalunye. Umehluko phakathi kwesekhethi ehambisanayo nesekhethi yochungechunge umele umqondo oyisisekelo kodwa obalulekile kwezobuchwepheshe bakagesi, njengoba lezi zindlela ezimbili zokuhlela zikhiqiza ukuziphatha okuhluke kakhulu mayelana ne-voltage, i-current, nokwethembeka kwesekhethi jikelele. Kusekhethi yochungechunge, izingxenye zixhunywa ekugcineni kokunye emzileni owodwa, ngakho i-current efanayo ihamba kungxenye ngayinye futhi ukumelana okuphelele kuyisamba sokumelana ngakunye, okwenza kufaneleke izinhlelo lapho kudingeka khona ukulawulwa okunembile kwe-current. Ngokuphambene, kusekhethi ehambisanayo, izingxenye zixhunywa emgqeni ofanayo emibili, zinikeza imizila eminingi yokuhamba kwe-current futhi ziqinisekisa ukuthi ukwehluleka kwegatsha elilodwa akuphazamisi isekhethi yonke, okuwubaluleke kakhulu ekusabalaliseni amandla nasekuklanyweni kwezinhlelo ezibalulekile. Ama-PCB amaningi anamuhla ahlanganisa inhlanganisela yazo zombili izinhlobo zochungechunge nezihambisanayo ukuze kuzuzwe izici zikagesi ezifiselekayo ngenkathi kulungiswa indawo nenani lezingxenye. Abaklami kumele bacabangele ngokucophelela ukushintshana phakathi kwalezi zindlela zokuhlela lapho behlela amasekhethi ezinhlelo ezisukela kuma-voltage divider alula kuya kumanethiwekhi ayinkimbinkimbi okusabalalisa amandla.

Ngaphezu kwezilungiselelo eziyisisekelo, izinhlobo zamasekhethi athuthukile zisetshenziselwa ukwenza imisebenzi ethile ebalulekile kwezobuchwepheshe banamuhla. Isibonelo, isekhethi yokuguqula amandla agcwele (full wave rectifier) iguqula amandla ashintshashintshayo (AC) abe amandla aqondile (DC) ngokusebenza kahle kakhulu kunalezo ezisebenzisa isigamu samandla, okwenza kube semqoka ekwakhiweni kwezinsiza zamandla ezintweni zikagesi zabathengi kanye nemishini yezimboni. I-full wave rectifier isebenzisa i-transformer ene-tap emaphakathi nama-diode amabili noma i-bridge configuration enama-diode amane ukuze ilungise zombili izingxenye ze-AC waveform, okuholela ekukhipheni i-DC ebushelelezi edinga ukuhlunga okuncane futhi inciphisa kakhulu i-ripple voltage. Olunye uhlobo lwesekhethi olubalulekile yi-LPF low pass filter, enciphisa amasignali anemvamisa ephezulu kuyilapho ivumela amasignali anemvamisa ephansi ukuthi adlule, idlala indima ebalulekile ekwehliseni umsindo, ekulungiseni amasignali, nasekugwemeni i-aliasing. I-LPF low pass filter ingasetshenziswa nge-RC (resistor-capacitor) networks ezilula noma nge-LC (inductor-capacitor) configurations eziyinkimbinkimbi, lapho i-cutoff frequency inqunywa amanani ezingxenye kanye nezidingo ezithile zokusetshenziswa. Onjiniyela kumele bakhethe i-filter topology kanye ne-oda elifanele ngokusekelwe ku-attenuation slope oyifunayo kanye nezici ze-passband zokusetshenziswa kwabo okuthile.

Amasekhethi edijithali ancike ezingxenyeni eziyisisekelo ezaziwa ngokuthi izinhlobo zamasekhethi anengqondo (logic gates), enza imisebenzi ye-Boolean kokufakwayo okungamabhayinari ukuze kukhiqizwe okukhishwayo okulawulwayo. Izinhlobo eziyinhloko zamasekhethi anengqondo zihlanganisa ama-AND, OR, NOT, NAND, NOR, XOR, kanye nama-XNOR gates, ngalinye linethebula leqiniso elihlukile elichaza ukusebenza kwalo ezinhlelweni zedijithali. Lawa masekhethi anengqondo ahlanganiswa ukuze akhe amasekhethi edijithali ayinkimbinkimbi njengama-adders, multiplexers, flip-flops, nama-microprocessors, akha umnyombo wokubala wezinto ezisukela kuzibali ezilula kuya kuma-smartphones athuthukile. Emongweni wezinhlelo zamandla ezimboni, izingxenye ezikhethekile ezinjengama-vacuum circuit breakers asetshenziselwa ukuvikela amasekhethi kagesi ekugcwalisweni ngokweqile nasekujikelezeni okufushane ngokuphazamisa ukugeleza kwamanje endaweni engenamoya, enikeza amandla aphakeme okucisha i-arc nempilo yokusebenza ende uma kuqhathaniswa nama-air circuit breakers avamile. Ukuhlanganiswa kwama-vacuum circuit breakers kuma-PCB okusabalalisa amandla kudinga ukwakhiwa ngokucophelela kwemizila kanye nokulawulwa kokushisa ukuze kusingathwe imisinga ephezulu kanye nokushintshashintsha okungokwesikhashana okuhambisana nezicelo zezimboni. Abaklami kumele baqinisekise amabanga anele okuhlukanisa nokugwema ukuze kuvinjwe ukuvutha kwe-arc futhi kugcinwe ukuphepha emasekhethini kagesi anamandla aphezulu.

Ukusebenza okuhlukahlukene kwamasekhethi e-PCB kwenza ukuthi asetshenziswe emikhakheni eminingi ehlukahlukene, ngamunye enezidingo ezihlukile eziqhuba ubuchwepheshe ekwakhiweni nasekukhiqizeni. Emishinini kagesi yabathengi, ama-PCB ayisisekelo sama-smartphone, ama-laptop, ama-tablet, izinto ezigqokwayo, namadivayisi ezindlu ezihlakaniphile, lapho isidingo sokunciphisa ubukhulu nokusebenza okuphezulu siholele ekusetshenzisweni okubanzi kobuchwepheshe be-HDI namabhodi ezingqimba eziningi anezingqimba ezingafika kwezingama-20 noma ngaphezulu. Lawa madivayisi adinga ukulawulwa okunembile kwe-impedance ukuze kuthuthwe izimpawu ezihamba ngesivinini esikhulu, ukuphathwa ngokucophelela kokushisa ukuze kukhishwe ukushisa okuvela kumaphrosesa anamandla, kanye nokuhlolwa okuqinile kokuthembeka ukuze kumelane nokusetshenziswa kwansuku zonke ezimeni ezihlukahlukene zemvelo. Umkhakha wezimboni uncike kuma-PCB ezinhlelweni zokulawula, amandla kagesi, imishini yokuzenzakalela, namathuluzi okulinganisa, lapho izici ezinjengokumelana nokudlidliza, ukubekezelela amazinga okushisa ahlukahlukene, nokuthembeka kwesikhathi eside kubaluleke kakhulu. Ama-PCB ezimboni avame ukufaka izintambo zethusi ezinzima ukuze aphathe imisinga ephezulu, izixhumi eziqinile ukuze zixhume ngokuphepha ezindaweni ezinzima, kanye nezinto zokumboza ukuze zivikele emswakameni, othulini, nasekuchayekeni kwamakhemikhali. Ikhono lokwenza ngokwezifiso izinto zebhodi nezingqimba ezihleliwe livumela abakhiqizi ukuthi bahlanganise izixazululo eziqondene ngqo nalezi zinhlelo ezinzima.

Iziqhingi zezimoto zimelela enye yezingxenye ezikhula ngokushesha kakhulu ekukhiqizweni kwama-PCB, njengoba izimoto zanamuhla ziqukethe ama-PCB amaningi asatshalaliswa ezikhungweni zokulawula injini, izinhlelo zokuzijabulisa, izinhlelo zosizo lokushayela eziphambili (ADAS), kanye nezinhlelo zokuphatha amabhethri ezimotweni zikagesi. Umkhakha wezimoto udinga ukwethembeka okukhethekile ngaphansi kokushintshashintsha kwezinga lokushisa okwedlulele, ukudlidliza, nokuphazamiseka kukagesi, okuholela ekusetshenzisweni kwezinto ezikhethekile nezinqubo zokukhiqiza ezihlangabezana namazinga ekhwalithi e-AEC-Q100 ne-IATF 16949. Imishini yezokwelapha idinga ama-PCB anezinga eliphezulu kakhulu lokunemba nokwethembeka, njengoba esetshenziswa emishinini yokuxilonga, ezinhlelweni zokuqapha iziguli, emishinini efakwa emzimbeni, nasezinsizeni zokuhlinza lapho ukwehluleka kungenakwenzeka. Ama-PCB ezokwelapha kumele athobele izimfuneko eziqinile zokulawula ezihlanganisa imihlahlandlela ye-ISO 13485 ne-FDA, ngokuvamile esebenzisa izinto ezinokwethembeka okuphezulu, imiklamo yamasekhethi eyisipele, kanye nezinqubo eziqinile zokuhlola. Ingqalasizinda yezokuxhumana ngocingo, ehlanganisa ama-routers, iziteshi eziyisisekelo, kanye nemishini ye-fiber optic, incike kuma-PCB anamandla aphezulu angakwazi ukugcina ubuqotho besignali emafrikhwensi e-gigahertz, kuyilapho izicelo ze-aerospace nezokuvikela zidinga amabhodi angasinda ekuphakameni okwedlulele, ekuchayekeni emisebeni, nasekushayweni okungokomshini ezinhlelweni ze-avionics ne-radar.

I-Shenzhen Huachuan Technology iziqinisekile njengomholi ekukhiqizeni ama-PCB ngokutshala izimali emandleni athuthukile abhekana nezidingo eziguqukayo zomklamo wesimanje we-elekthronikhi. Le nkampani igxile kubuchwepheshe be-high-density interconnect (HDI), obuvumela ukwakhiwa kwamabhodi anemizila emincane, ama-vias amancane, nokuminyana okuphezulu kwezingxenye, okuvumela abaklami ukuthi bafake ukusebenza okuningi ezimweni eziminyene zezinhlelo ezinomkhawulo wendawo. Ama-HDI boards asebenzisa ama-blind vias axhuma ungqimba lwangaphandle kungqimba lwangaphakathi ngaphandle kokungena kulo lonke ibhodi, kanye nama-buried vias axhuma izingqimba zangaphakathi kuphela, okwandisa kakhulu ukuminyana komzila nokuqina kwesignali kuyilapho kunciphisa inani lezingqimba. Ama-Microvias, anobubanzi obuncane njengama-0.1 millimitha, abhobozwa nge-laser futhi afakwe i-plating ukuze anikeze ukuxhumana okuthembekile phakathi kwezingqimba eziseduze, okwenza ukubekwa kwezingxenye okuminyene okudingekayo kuma-smartphones esimanje namadivayisi agqokwayo. Lawa mandla athuthukile ahlanganiswa nohlelo oluphelele lokuphatha ikhwalithi oluhlanganisa isitifiketi se-ISO, ukuhlola okuzenzakalelayo kwe-optical (AOI), nokuhlola nge-X-ray ukuze kutholwe amaphutha ezingqimbeni ezifihliwe nasemajoyintini e-solder angabonakali ngamehlo. Ithimba lobuchwepheshe lenkampani lisebenza eduze namakhasimende ukuze lithuthukise imiklamo ukuze ikwazi ukukhiqizwa, kuncishiswe izindleko zokukhiqiza futhi kuthuthukiswe izivuno kusukela esigabeni se-prototype kuze kube ukukhiqizwa okugcwele.

Inkampani yokuzibophezela kwekhwalithi nokwethembeka kuboniswa ngokuqhubekayo ngezinqubo zokuhlola eziqinile eziqinisekisa ukuthi i-PCB ngayinye ihlangabezana namazinga aphezulu ngaphambi kokuthunyelwa. Izindlela zokuhlola zikagesi ezifana nokuhlola nge-flying probe kanye nokuhlola nge-bed-of-nails ziqinisekisa ukuqhubeka nokuhlukaniswa kuwo wonke amanethiwekhi, zibambe imijikelezo evulekile nemifushane engabangela ukwehluleka kokusebenza emkhiqizweni wokugcina. I-Shenzhen Huachuan inikezela ngezinsizakalo zokwenza amaprototypu asheshayo ezivumela amakhasimende ukuthi aqinisekise imiklamo yawo ngokushesha, ngezikhathi zokuhamba ezigcizelela kakhulu umjikelezo wokuthuthukiswa komkhiqizo futhi zinciphise isikhathi sokufika emakethe yemikhiqizo emisha kagesi. Izixazululo ezenziwe ngokwezifiso ziyikhono eliyinhloko, ngobuchule kumabhodi e-flex-rigid ahlanganisa ama-substrate aguquguqukayo naqinile ezinhlelweni ezidinga ukusekelwa kwesakhiwo nokugoba okuguquguqukayo, amabhodi ethusi asindayo aphatha imisinga edlula ama-100 amps kwezinto zikagesi zamandla, kanye nezinto ezisebenza kumaza aphezulu ezigcina ubuqotho besignali ezinhlelweni ze-RF ne-microwave. Ukuze uthole ulwazi olwengeziwe mayelana nohlu lwemikhiqizo yenkampani, vakashela i-Imikhiqizo ikhasi, noma funda ngomlando wenkampani nezitifiketi kusetshenziswa i-Mayelana Nathi ikhasi. Amakhasimende angahlala enolwazi olusha lomkhakha nezindaba zenkampani nge-Izindaba isigaba, futhi imibuzo ingaqondiswa nge-Xhumana Nathi ikhasi. I-Ikhaya ikhasi linikeza umbono ophelele wamandla enkampani kanye neminikelo yezinsizakalo.

Ukuqonda kahle amagama abalulekile kubalulekile ekuxhumaneni okuphumelelayo phakathi kwabaklami, abakhiqizi, namakhasimende kuyo yonke inqubo yokuthuthukiswa kwe-PCB. I-trace isho umthombo wethusi othwala amasignali kagesi phakathi kwezingxenye ku-PCB, ububanzi bayo nokujiya kwayo kunqunywa izidingo zamanje kanye nemininingwane ye-impedance yesekethe. I-via iyimbobo enensimbi enikeza ukuxhumana kukagesi phakathi kwezingqimba ezahlukene ze-PCB enezingqimba eziningi, izinhlobo ezivamile zihlanganisa ama-via angena ngaphakathi anqamula yonke ibhodi, ama-blind via axhuma ungqimba lwangaphandle kungqimba olulodwa noma eziningi zangaphakathi, kanye nama-buried via axhuma izingqimba zangaphakathi kuphela ngaphandle kokufinyelela ebusweni. I-solder mask iwukumboza okuvikelayo okufakwa phezu kwama-trace ethusi ukuvimbela ukuhlangana kwe-solder ngesikhathi sokuhlanganisa kanye nokuvikela ithusi elingaphansi ekugqwaleni nasekulimaleni kwemvelo. I-impedance isho ukumelana okulawulwayo kwe-trace emafrikhwensi aphezulu, okuyipharamitha ebalulekile kumasekethe e-high-speed digital kanye ne-RF okufanele igcinwe ngaphakathi kwamazinga aqinile ukuze kuqinisekiswe ubuqotho besignali futhi kugwenywe ukubonakala. Iphaneli iwuhlu lwama-PCB amaningi ahlukene akhiqizwa ndawonye njengeyunithi eyodwa ukuze kuthuthukiswe ukusebenza kahle kokukhiqiza, amabhodi ngamanye ahlukaniswa ngemva kokuhlanganisa ngokusebenzisa i-routing noma i-scoring.

Umkhakha wokuklama nokukhiqiza ama-PCB uyaqhubeka nokuthuthuka ngokushesha, uqhutshwa yisidingo esingapheli sezinto zikagesi ezincane, ezisheshayo, nezithembekile kuyo yonke imikhakha. Kusukela ekuqondeni umehluko oyisisekelo phakathi komjikelezo ohambisanayo nomjikelezo ochungechungeni kuya ekusebenziseni ubuchwepheshe obuthuthukile obufana ne-HDI kanye ne-controlled impedance, onjiniyela kumele bakwazi ukwazi imiqondo eminingi ukuze bakhe imikhiqizo eyimpumelelo. Ukuhlanganiswa kwezinhlobo ezahlukene zamasekhethi, okuhlanganisa ama-full wave rectifiers okuguqula amandla, ama-LPF low pass filters okulungisa amasignali, kanye nezinhlobo ezahlukene zamasango anengqondo (logic gates) zokucubungula idijithali, kukhombisa ukusebenza okuhlukahlukene namandla emiklamo esekelwe kuma-PCB. Njengoba izimboni ezifana nezimoto, ezokwelapha, nezokuxhumana ziqhubekela phambili emingceleni yalokho okungenzeka, abakhiqizi abafana ne-Shenzhen Huachuan Technology bangabalingani ababalulekile ekwenzeni lezi zinto ezintsha zibe ngokoqobo ngokusebenzisa amakhono athuthukile, ukuqinisekisa ikhwalithi okuqinile, nokuzibophezela empumelelweni yamakhasimende. Ngokuhlala benolwazi ngobuchwepheshe bakamuva kanye nezinqubo ezinhle ekuklanyweni nasekukhiqizweni kwama-PCB, amabhizinisi angasebenzisa lezi zisekelo ukuze akhe imikhiqizo kagesi evelele emakethe yomhlaba. Ubambiswano phakathi kwamaqembu anekhono okuklama nabakhiqizi abanolwazi ekugcineni lunquma ikhwalithi, ukwethembeka, nokusebenza kwemishini kagesi enika amandla umhlaba wethu wanamuhla.