Ngokwezifiso Fr-4 Circuit Board Pcb Board
Imithetho Eyisisekelo Yesakhiwo Se-PCB
1. Ukuhlelwa ngokwemodyuli yesifunda, izifunda ezihambisanayo eziqaphela umsebenzi ofanayo zibizwa ngokuthi imojuli, izingxenye zemojula yesifunda kufanele zamukele isimiso sokugxila okuseduze, futhi isifunda sedijithali kanye nesifunda se-analog kufanele sihlukaniswe;
2. Izingxenye namadivayisi kufanele kugxunyekwe ngaphakathi kuka-1.27mm eduze kwezimbobo ezinganyuki njengezimbobo zokubeka indawo kanye nezimbobo ezijwayelekile, futhi azikho izingxenye okufanele zifakwe phakathi kuka-3.5mm (ku-M2.5) no-4mm (ku-M3) eduze kwezimbobo ezifakwayo njenge izikulufo;
3. Gwema ukubeka izinto ezingezansi ngezansi njengama-resistors afakwe ngokuvundlile, ama-inductors (ama-plug-ins), nama-electrolytic capacitor ukuze ugweme amasekhethi amafushane phakathi kwe-vias negobolondo lengxenye ngemva kokusoda kwegagasi;
4. Ibanga phakathi kwengaphandle lengxenye kanye nomphetho webhodi ngu-5mm;
5. Ibanga phakathi kwengaphandle lephedi yengxenye egxunyekiwe kanye nengaphandle lengxenye ebekwe eduze likhulu kuno-2mm;
6. Izingxenye zegobolondo lensimbi nezingxenye zensimbi (amabhokisi okuvikela, njll.) azikwazi ukuthinta ezinye izingxenye, futhi azikwazi ukusondela emigqeni ephrintiwe namaphedi, futhi isikhala kufanele sibe sikhulu kuno-2mm.Ubukhulu bezimbobo zokubeka, izimbobo zokufaka iziqinisi, izimbobo eziyisiyingi nezinye izimbobo zesikwele epuleti zinkulu kuno-3mm ukusuka onqenqemeni lwepuleti;
7. Isici sokushisa asikwazi ukusondela kucingo kanye nesici esishisayo;isici sokushisa okuphezulu kufanele sisatshalaliswe ngokulinganayo;
8. Isokhethi yamandla kufanele ihlelwe eduze kwebhodi eliphrintiwe ngangokunokwenzeka, futhi amatheminali ebha yebhasi axhunywe kwisokhethi yamandla kufanele ahlelwe ohlangothini olufanayo.Ukunakekelwa okukhethekile kufanele kuthathwe ukuhlela amasokhethi amandla nezinye izixhumi ezidayisiwe phakathi kwezixhumi, ukuze kube lula ukuthengiswa kwalezi zisekelo nezixhumi, nokuklama nokubopha izintambo zamandla.Ukuhlelwa kwezikhala zamasokhethi amandla nezixhumi zokushisela kufanele kucatshangelwe ukuze kube lula ukufakwa nokususwa kwamapulaki amandla;
9. Ukuhlelwa kwezinye izingxenye:
Zonke izingxenye ze-IC ziqondaniswe ngokuhlangene, i-polarity yezingxenye ze-polar imakwe ngokucacile, futhi ukumakwa kwe-polarity ebhodini elifanayo eliphrintiwe akufanele kube ngaphezu kwezikhombisi-ndlela ezimbili.Lapho kuvela izikhombisi-ndlela ezimbili, lezi zikhombisi-ndlela ezimbili zi-perpendicular komunye nomunye;
10. I-wiring ebhodini kufanele iminyene kahle.Uma umehluko wokuminyana mkhulu kakhulu, kufanele ugcwaliswe nge-mesh ye-foil yethusi, futhi i-mesh kufanele ibe mkhulu kuno-8mil (noma u-0.2mm);
11. Akufanele kube khona izimbobo kuma-patch pads, ukuze ugweme ukulahlekelwa kwe-solder paste futhi kubangele ukuthi izingxenye zithengiswe.Imigqa yesignali ebalulekile ayivunyelwe ukuba idlule phakathi kwezikhonkwane zesokhethi;
12. I-patch iqondaniswe ngokuhlangothini olulodwa, isiqondiso somlingisi siyefana, futhi isiqondiso sokupakisha siyefana;
13. Kumadivayisi ane-polarity, isiqondiso sokumaka i-polarity ebhodini elifanayo kufanele sihambisane ngangokunokwenzeka.
Imithetho Yokuhamba Kwengxenye Ye-PCB
1. Endaweni lapho indawo yezintambo ingaphansi noma ilingana no-1mm ukusuka onqenqemeni lwe-PCB, futhi ngaphakathi kuka-1mm eduze kwembobo efakwayo, izintambo azivunyelwe;
2. Intambo kagesi kufanele ibe banzi ngangokunokwenzeka futhi akufanele ibe ngaphansi kuka-18mil;ububanzi bomugqa wesignali akufanele bube ngaphansi kuka-12mil;imigqa yokufaka ye-cpu neyokukhipha akufanele ibe ngaphansi kuka-10mil (noma u-8mil);isikhala somugqa akufanele sibe ngaphansi kuka-10mil;
3. Isilinganiso esijwayelekile singekho ngaphansi kuka-30mil;
4. I-Dual in-line: iphedi engu-60mil, indawo yokungena engu-40mil;
I-1/4W resistor: 51 * 55mil (i-0805 surface mount);uma uku-line, iphedi ingu-62mil, kanti indawo yokuvula ingu-42mil;
I-Electrodeless capacitor: 51 * 55mil (i-0805 surface mount);uma ixhunywe ngokuqondile, iphedi ingu-50mil, kanti indawo yokuvula ingu-28mil;
5.Qaphela ukuthi intambo yamandla kanye nentambo yaphansi kufanele ibe yi-radial ngangokunokwenzeka, futhi intambo yesignali akufanele iboshwe.
Umbukiso Wemboni
