Uyilo lweBhodi yeSekethe eshicilelweyo
Ibhodi yesekethe ye-SMT yenye yezinto eziyimfuneko kuyilo lokunyuka komphezulu.Ibhodi yesekethe ye-SMT yinkxaso yamacandelo esekethe kunye nezixhobo kwiimveliso zombane, eziqonda uxhulumaniso lombane phakathi kwamacandelo esekethe kunye nezixhobo.Ngokuphuhliswa kobuchwepheshe be-elektroniki, Umthamo weebhodi ze-PCB uya usiba mncinci kwaye uncinci, ukuxinana kuya phezulu nangaphezulu, kunye neengqimba zeebhodi zePCB zihlala zisanda.Ke ngoko, ii-PCBs kufuneka zibe neemfuno eziphezulu neziphezulu ngokwendlela yoyilo jikelele, isakhono sokuchasana nokuphazamiseka, inkqubo kunye nokwenziwayo.
Amanyathelo aphambili oyilo lwePCB;
1: Zoba umzobo weskim.
2: Ukwenziwa kwecandelo lethala leencwadi.
3: Ukuseka ubudlelwane bonxibelelwano lwenethiwekhi phakathi komzobo weskimu kunye namacandelo ebhodi eprintiweyo.
4: Iingcingo kunye noyilo.
I-5: Yenza imveliso yebhodi eprintiweyo kwaye usebenzise idatha kunye nokuveliswa kokubekwa kunye nokusetyenziswa kwedatha.
Le miba ilandelayo kufuneka ithathelwe ingqalelo kwinkqubo yoyilo lweebhodi zeesekethe eziprintiweyo:
Kuyimfuneko ukuba kuqinisekiswe ukuba iigraphics zamacandelo kwi-circuit schematic diagram zihambelana nezinto ezizizo kunye nokuba unxibelelwano lwenethiwekhi kumzobo we-circuit schematic diagram ichanekile.
Uyilo lweebhodi zeesekethe eziprintiweyo aluqwalaseli kuphela uxhulumaniso lonxibelelwano lwenethiwekhi yomzobo weskimu, kodwa luqwalasela ezinye iimfuno zobunjineli besekethe.Iimfuno zobunjineli besiphaluka ubukhulu becala ububanzi bemigca yamandla, iingcingo zomhlaba kunye nezinye iingcingo, ukudityaniswa kwemigca, kunye nezinye iimpawu ze-High-frequency zamacandelo, i-impedance of components, anti-interference, njl.
Iimfuno zofakelo lwebhodi yesekethe eprintiweyo yonke inkqubo ngokuyintloko iqwalasela imingxuma yokufakela, iiplagi, imingxuma yokubeka, amanqaku okubhekisela, njl.
Kufuneka ihlangabezane neemfuno, ukubekwa kwamacandelo ahlukeneyo kunye nofakelo oluchanekileyo kwindawo echaziweyo, kwaye ngexesha elifanayo, kufuneka kube lula ukufakwa, ukulungiswa kwenkqubo, kunye nokukhupha umoya kunye nokutshatyalaliswa kobushushu.
Ukwenziwa kweebhodi zesekethe eziprintiweyo kunye neemfuno zayo zokwenziwa, ukuqhelana nemigaqo yoyilo kunye nokuhlangabezana neemfuno zemveliso.
Iimfuno zenkqubo, ukwenzela ukuba ibhodi yesekethe eyiliweyo eprintiweyo inokuveliswa kakuhle.
Ukuqwalasela ukuba amacandelo alula ukuyifaka, ukulungisa, kunye nokulungiswa kwimveliso, kwaye kwangaxeshanye, iigraphics kwibhodi yesekethe eprintiweyo, i-soldering, njl.
Iipleyiti, ii-vias, njl njl. mazibe semgangathweni ukuqinisekisa ukuba amacandelo awangqubani kwaye afakwe ngokulula.
Injongo yokuyila ibhodi yesekethe eprintiweyo ikakhulu yesicelo, ngoko ke kufuneka siqwalasele ukwenzeka kwayo kunye nokuthembeka kwayo,
Kwangaxeshanye, umaleko kunye nendawo yebhodi yesekethe eprintiweyo iyancitshiswa ukunciphisa iindleko.Iipads ezinkulu ngokufanelekileyo, ngokusebenzisa imingxunya, kunye ne-wiring zinceda ekuphuculeni ukuthembeka, ukunciphisa i-vias, ukulungelelanisa i-wiring, kunye nokwenza kube lukhuni ngokulinganayo., ukuhambelana kuhle, ukwenzela ukuba i-layout jikelele yebhodi ibe yinto enhle kakhulu.
Okokuqala, ukwenza ibhodi yesekethe eyiliweyo ifezekise injongo elindelekileyo, ukubekwa ngokubanzi kwebhodi yesekethe eprintiweyo kunye nokubekwa kwamacandelo kudlala indima ephambili, echaphazela ngokuthe ngqo ukufakela, ukuthembeka, ukungena komoya kunye nokuchithwa kobushushu bebhodi yesekethe eprintiweyo yonke, kunye nokufaka iingcingo zombane.
Emva kokuba indawo kunye nemilo yamacandelo kwi-PCB imisiwe, qwalasela i-wiring ye-PCB
Okwesibini, ukwenzela ukuba imveliso eyiliweyo isebenze ngcono kwaye isebenze ngakumbi, i-PCB kufuneka ithathele ingqalelo isakhono sayo sokuchasana nokuphazamiseka kuyilo, kwaye inobudlelwane obusondeleyo kunye nesekethe ethile.
Ezintathu, emva kokuba amacandelo kunye noyilo lwesekethe lwebhodi yesekethe lugqityiwe, uyilo lwenkqubo yalo kufuneka luqwalaselwe ngokulandelayo, injongo kukuphelisa zonke iintlobo zezinto ezimbi ngaphambi kokuba imveliso iqale, kwaye kwangaxeshanye, ukwenziwa kwebhodi yesekethe. kufuneka kuthathelwe ingqalelo ukuze kuveliswe iimveliso ezikumgangatho ophezulu.kunye nemveliso enkulu.
Xa sithetha malunga nokumiswa kunye nee-wiring zamacandelo, sele sele sibandakanye enye yenkqubo yebhodi yesiphaluka.Uyilo lwenkqubo yebhodi yesekethe ikakhulu ukudibanisa ibhodi yesekethe kunye namacandelo esiyilwe ngomgca wokuvelisa we-SMT, ukuze sifezekise uxhulumaniso olulungileyo lombane.Ukufezekisa ukuma kwendawo yeemveliso zethu zoyilo.Uyilo lwePad, i-wiring kunye nokuchasana nokuphazamiseka, njl., kufuneka kwakhona siqwalasele ukuba ibhodi esiyiyile kulula ukuyivelisa, ingaba inokudityaniswa neteknoloji yendibano yanamhlanje-SMT, kwaye kwangaxeshanye, kufuneka iphunyezwe. imveliso.Vumela iimeko zokuvelisa iimveliso ezineziphene zivelise ubude boyilo.Ngokukodwa, kukho le miba ilandelayo:
I-1: Imigca yokuvelisa i-SMT eyahlukeneyo ineemeko ezahlukeneyo zokuvelisa, kodwa ngokubhekiselele kubukhulu bePCB, ubukhulu bebhodi enye ye-PCB ayikho ngaphantsi kwe-200 * 150mm.Ukuba icala elide lincinci kakhulu, ungasebenzisa ukubekwa, kwaye umlinganiselo wobude ukuya kububanzi ngu-3: 2 okanye 4: 3 Xa ubungakanani bebhodi yesekethe bukhulu kune-200 × 150mm, amandla omatshini webhodi yesekethe kufuneka kuthathelwe ingqalelo.
I-2: Xa ubukhulu bebhodi yesiphaluka buncinci kakhulu, kunzima kuyo yonke inkqubo yokuvelisa umgca we-SMT, kwaye akulula ukuvelisa kwiibhetshi.Iibhodi zidityaniswe kunye ukuze zenze ibhodi epheleleyo efanelekileyo kwimveliso yobuninzi, kwaye ubungakanani bebhodi yonke kufuneka bufanelekele ubungakanani boluhlu lokunamathisela.
I-3: Ukuze ulungelelanise nokubekwa komgca wokuvelisa, uluhlu lwe-3-5mm kufuneka lushiywe kwi-veneer ngaphandle kwamacandelo, kwaye umgca wenkqubo ye-3-8mm kufuneka ushiywe kwipaneli.Kukho iintlobo ezintathu zoqhagamshelwano phakathi komphetho wenkqubo kunye ne-PCB: A ngaphandle kwemiphetho edibeneyo, Kukho i-groove yokwahlukana, i-B inecala kunye ne-groove yokwahlukana, i-C inecala kwaye ayikho i-groove yokwahlukana.Kukho inkqubo engenanto.Ngokwemilo yebhodi yePCB, kukho iindlela ezahlukeneyo zejigsaw.Kwi-PCB Indlela yokubeka yecala lenkqubo yahlukile ngokweemodeli ezahlukeneyo.Abanye banemingxuma yokubeka kwicala lenkqubo.Ububanzi bomngxuma ngu-4-5 cm.Ukuthetha ngokuthelekisa, ukuchaneka kokumisa kuphezulu kunoko kwecala, ngoko ke kukho imingxunya yokubeka indawo.Xa imodeli iprosesa iPCB, kufuneka ixhotyiswe ngemingxuma yokubeka, kwaye uyilo lomngxuma kufuneka lube semgangathweni, ukuze lungabangeli ukuphazamiseka kwimveliso.
4: Ukuze ufumane indawo engcono kwaye ufezekise ukuchaneka okuphezulu, kuyimfuneko ukuseta indawo yesalathiso yePCB.Ingaba kukho indawo yokubhekisela kunye nokuba ilungile okanye ayiyi kuchaphazela ngokuthe ngqo ukuveliswa kobuninzi bomgca wemveliso ye-SMT.Ubume bendawo yesalathiso bunokuba sisikwere , isetyhula, unxantathu, njl njl. Kwaye ububanzi bungaphakathi koluhlu malunga ne-1-2mm, kwaye kufuneka ibe phakathi koluhlu lwe-3-5mm malunga nendawo yesalathiso, ngaphandle kwamacandelo kunye nokukhokela. .Kwangaxeshanye, indawo yesalathiso kufuneka igudileyo kwaye ithe tyaba ngaphandle koNgcoliseko.Uyilo lwenqaku lokubhekisela akufanele lusondele kakhulu kumda webhodi, kwaye kufuneka kube nomgama we-3-5mm.
I-5: Ukusuka kwimbono yenkqubo yokuvelisa ngokubanzi, ukumila kwebhodi kukhethwa ukuba kufakwe i-pitch-shaped, ngokukodwa kwi-soldering wave.Ukusetyenziswa kwamaxande kulungele ukuhanjiswa.Ukuba kukho indawo elahlekileyo kwibhodi ye-PCB, indawo elahlekileyo kufuneka izaliswe ngendlela yenkqubo edge.Kuba enye Ibhodi ye-SMT ivumela iindawo zokubeka ezilahlekileyo.Kodwa iindawo zokubeka ezilahlekileyo akulula ukuba zibe zikhulu kakhulu kwaye kufuneka zibe ngaphantsi kwe-1/3 yobude becala.
Ngamafutshane, ukwenzeka kweemveliso ezineziphene kunokwenzeka kuzo zonke ikhonkco, kodwa ngokubhekiselele kuyilo lwebhodi ye-PCB, kufuneka kuthathelwe ingqalelo kwiinkalo ezahlukeneyo, ukuze kungabi kuphela ukuqonda injongo yoyilo lwethu lwemveliso, kodwa kwakhona ilungele umgca wemveliso we-SMT kwimveliso.Ukuveliswa kobuninzi, zama konke okusemandleni ethu ukuyila iibhodi zePCB ezikumgangatho ophezulu, kunye nokunciphisa ukubanakho kweemveliso ezinengxaki.
Ixesha lokuposa: Apr-05-2023