Yiziphi izimiso eziyisithupha zezintambo ze-PCB?

I-Zhejiang NeoDen Technology Co., LTD., eyasungulwa ngo-2010, ingumkhiqizi ochwepheshe onguchwephesheUmshini wokukhweza we-SMT, reflow oven,iphrinta ye-stencil, ulayini wokukhiqiza we-SMT neminye Imikhiqizo ye-SMT.Sineqembu lethu le-R & D kanye nemboni yethu, sisebenzisa i-R&D yethu ecebile enokuhlangenwe nakho, ukukhiqizwa okuqeqeshwe kahle, sazuza idumela elihle kumakhasimende omhlaba wonke.
Kule minyaka eyishumi, sithuthuke ngokuzimeleI-NeoDen4, NeoDen IN6,I-NeoDen K1830, NeoDen FP2636 kanye neminye imikhiqizo ye-SMT, eyathengiswa kakhulu emhlabeni wonke.Kuze kube manje, sesithengise imishini engaphezu kuka-10,000pcs futhi sayithumela emazweni angaphezu kuka-130 emhlabeni jikelele, sakha idumela elihle emakethe.Ku-Ecosystem yethu yomhlaba wonke, sibambisana nozakwethu ohamba phambili ukuze silethe isevisi yokuthengisa evala kakhudlwana, ukusekelwa okuphezulu okuchwepheshile nokusebenza kahle.
Yiziphi izimiso eziyisithupha zezintambo ze-PCB?
1. Ukunikezwa kwamandla, ukucubungula phansi
Kokubili izintambo kulo lonke ibhodi le-PCB kuqedwa kahle, kodwa ukuphazamiseka okubangelwa amandla acatshangelwe kabi nemigqa yaphansi kuzokwehlisa ukusebenza komkhiqizo, futhi ngezinye izikhathi kuthinte ngisho nempumelelo yomkhiqizo.Ngakho-ke, izintambo zikagesi nezasemhlabeni kufanele zithathwe ngokungathi sína ukuze kuncishiswe ukuphazamiseka komsindo okukhiqizwa izintambo zikagesi nezasemhlabeni ukuze kuqinisekiswe ikhwalithi yemikhiqizo.Ngonjiniyela ngamunye obambe iqhaza ekwakhiweni kwemikhiqizo ye-elekthronikhi baqonde izizathu zomsindo okhiqizwa phakathi komhlaba kanye nezintambo zikagesi.Manje kuphela ukuze kuncishiswe uhlobo lokucindezela komsindo oluzochazwa: okwaziwayo kusekunikezeni kwamandla kagesi, phakathi komugqa ophansi kanye nama-capacitor aqaqa.Zama ukunweba ukunikezwa kwamandla, ububanzi bomugqa ophansi, okungcono kube banzi kunolayini wamandla, ubuhlobo babo buwukuthi: umugqa ophansi > ulayini wamandla > ulayini wesignali, ngokuvamile ububanzi bomugqa wesignali: 0.2 ~ 0.3mm, ububanzi obukhulu kakhulu bufika ku-0.05 ~ 0.07mm, intambo yamandla ka-1.2 ~ 2.5 mm kusekethe yedijithali ye-PCB etholakala ngocingo olubanzi lomhlabathi ukuze yenze isekethe, okungukuthi, yakha inethiwekhi yomhlabathi ezosetshenziswa (isekethe ye-analog (umhlabathi wesekethe ye-analog ayikwazi ukusetshenziswa ngale ndlela) nge indawo enkulu yethusi ungqimba umhlabathi, in the ephrintiwe wesifunda ibhodi ayisetshenziswa endaweni axhunywe emhlabathini njengoba umhlabathi Noma wenze ibhodi multilayer, ukunikezwa kwamandla, umhlabathi ngamunye thatha ungqimba.
2. amasekhethi edijithali namasekhethi e-analog ukuze kucutshungulwe umhlabathi ojwayelekile
Kulezi zinsuku, ama-PCB amaningi awaselona isekethe yomsebenzi owodwa, kodwa ayingxube yamasekhethi edijithali nawe-analog.Ngakho-ke, ku-wiring kuzodingeka ukuthi ucabangele inkinga yokuphazamiseka okuhlangene phakathi kwabo, ikakhulukazi ukuphazamiseka komsindo phansi.Amasekhethi edijithali anemvamisa ephezulu, amasekhethi e-analog azwela, emigqeni yesiginali, imigqa yesiginali yemvamisa ephezulu kude ngangokunokwenzeka kusuka kumadivayisi esekethe e-analog abucayi, phansi, yonke i-PCB emhlabeni wangaphandle kuphela ukuhlangana, ngakho-ke i-PCB kufanele ibe kusetshenzwe ngaphakathi kwesisekelo esivamile sedijithali ne-analogi, futhi ibhodi empeleni lihlukaniswe nomhlabathi wedijithali ne-analog awaxhumekile komunye nomunye, kuphela ku-PCB kanye noxhumano lwezwe langaphandle Isixhumi esibonakalayo phakathi kwe-PCB nezwe langaphandle.I-digital ground kanye ne-analog ground inoxhumo olufushane, sicela uqaphele ukuthi kunephoyinti elilodwa kuphela lokuxhuma.Futhi akukho okuvumelanayo ku-PCB, okunqunywa ukwakheka kwesistimu.
3. imigqa yesignali ebekwe phezu kukagesi (emhlabathini) ungqimba
In the multilayer ephrintiwe wesekethe ibhodi izintambo, ngenxa umugqa isignali ungqimba akuqediwe indwangu line kwesokunxele has not okuningi, bese wengeza izingqimba ngaphezulu kuzobangela imfucuza uyophinde wengeze inani elithile lomsebenzi ekukhiqizeni, izindleko ziye zanda ngokufanele, ukuze uxazulule lokhu kuphikisana, ungacabangela ukufaka izintambo kungqimba lukagesi (umhlabathi).Ukucatshangelwa kokuqala kufanele kube ukusebenzisa ungqimba lwamandla, kulandele ungqimba lomhlabathi.Ngoba kungcono kakhulu ukugcina ubuqotho bongqimba lomhlabathi.
4. Ukuphatha imilenze yokuxhuma kuma-conductor wendawo enkulu
Emhlabathini omkhulu (ugesi), izingxenye ezivame ukusetshenziswa zomlenze nokuxhumeka kwawo, ukucutshungulwa komlenze wokuxhuma kudinga ukucatshangelwa okuphelele, mayelana nokusebenza kukagesi, i-pad yomlenze wengxenye kanye nokuxhumana okugcwele kwethusi kuhle, kodwa ukuhlanganiswa kokushisela kwezingxenye kukhona ezinye izingibe ezingathandeki njengokuthi: ① ukushisela kudinga izifudumezi ezinamandla amakhulu.② kulula ukubangela amaphuzu e-solder angamanga.Ngakho-ke cabangela ukusebenza kukagesi kanye nezidingo zenqubo, ezenziwe ngamaphedi ezimbali eziphambanayo, okubizwa ngokuthi ukuhlukaniswa okushisayo okuvame ukubizwa ngokuthi ama-hot pads, ukuze amathuba okuba amaphuzu e-solder angamanga ngenxa yokushisa ngokweqile kwesigaba esiphambanweni ngesikhathi sokushisela kuyancipha kakhulu.Ibhodi elinezingqimba eziningi zomlenze wongqimba ophansi (umhlabathi) wokwelashwa okufanayo.
5. Indima yezinhlelo zenethiwekhi kuzintambo
Ezinhlelweni eziningi ze-CAD, izintambo zisekelwe esinqumweni sesistimu yenethiwekhi.Igridi iminyene kakhulu, indlela iyanda, kodwa isinyathelo sincane kakhulu, futhi inani ledatha emkhakheni wezibalo likhulu kakhulu, okuyinto nakanjani enezidingo eziphakeme zendawo yokugcina imishini, futhi ibuye ibe nomthelela omkhulu. ngesivinini sekhompyutha sohlobo lwemikhiqizo kagesi.Futhi enye indlela ayivumelekile, njengephedi ehlala ingxenye yomlenze noma imbobo yokufaka, egxilise izimbobo zabo ezihlalwa yi-.Igridi iyingcosana kakhulu, ukufinyelela okuncane kakhulu kwendwangu ngenani lomthelela omkhulu.Ngakho-ke kufanele kube nesistimu yegridi enengqondo ukusekela inqubo yezintambo.Ibanga eliphakathi kwemilenze emibili yezingxenye ezijwayelekile lingu-0.1 intshi (2.54 mm), ngakho isisekelo sesistimu yegridi ngokuvamile simiswa ku-intshi engu-0.1 (2.54 mm) noma inombolo ephelele yokuphindaphinda engaphansi kuka-intshi engu-0.1, njengalokhu: iyintshi engu-0.05 , 0.025 intshi, 0.02 intshi, njll.
6. Ukuhlola Umthetho Wokuklama (i-DRC)
Ngemuva kokuthi umklamo wezintambo usuqediwe, kuyadingeka ukuhlola ngokucophelela ukuthi umklamo wezintambo uyahambisana yini nemithetho ebekwe umklami, futhi futhi uqinisekise ukuthi imithetho ebekiwe iyahlangabezana yini nezidingo zenqubo yokukhiqiza yebhodi lesifunda eliphrintiwe, ngokuvamile elihlola izici ezilandelayo: umugqa nomugqa, umugqa kanye nephedi yengxenye, ulayini kanye nembobo, iphedi lengxenye kanye nembobo, noma ngabe ibanga eliphakathi kwembobo nembobo linengqondo yini nokuthi liyahlangabezana yini nezidingo zokukhiqiza.Ingabe ububanzi bamandla nemigqa yaphansi bufanelekile, futhi ingabe kukhona ukuhlangana okuqinile (i-low wave impedance) phakathi kwamandla nemigqa yaphansi?Ingabe zisekhona izindawo ku-PCB lapho umugqa ophansi unganwetshwa.Ingabe izinyathelo ezingcono kakhulu ezithathelwa imigqa yesignali ebalulekile, njengobude obufushane kakhulu, ukungeza imigqa yokuvikela, nemigqa yokufaka neyokukhiphayo ihlukaniswe ngokucacile.Ukuthi izigaba zesekethe ye-analog neyedijithali zinemigqa yazo ehlukile eyisisekelo.Ukuthi imidwebo (isb. izithonjana, amalebula amanothi) engezwe kamuva ku-PCB ingabangela izikhindi zesignali.Ukuguqulwa kwezinye izimo zomugqa ezingathandeki.Ingabe kukhona umugqa wenqubo owengezwe ku-PCB?Ingabe ukumelana ne-solder kuyahlangabezana nezidingo zenqubo yokukhiqiza, ubukhulu bokumelana ne-solder bufanelekile, futhi izimpawu zezinhlamvu ezicindezelwe kumaphedi edivayisi ukuze zingaphazamisi ikhwalithi yokufaka ugesi.Ingabe unqenqema lohlaka lwangaphandle lwesendlalelo senhlabathi yamandla ebhodini lezendlalelo eziningi luncishisiwe, njengongqimba lwamandla omhlaba wefoyili yethusi oluvezwe ngaphandle kwebhodi luthambekele ekujikelezeni okufushane.Uhlolojikelele Inhloso yalo mbhalo ukuchaza ukusetshenziswa kwesofthiwe ye-PADS ephrintiwe yebhodi lesifunda i-PowerPCB yenqubo yokuklama ibhodi lesifunda ephrintiwe kanye nokucatshangelwa okuthile kweqembu elisebenzayo labaklami ukunikeza imininingwane yedizayini ukuze kube lula ukuxhumana phakathi kwabaklami nokuhlolana.