Isiko Fr-4 Ibhodi yeSekethe yePcb yeBhodi

IMithetho eSisiseko yoLwakhelo lwePCB

1. Ukuhlelwa ngokwemodyuli yesekethe, iisekethe ezihambelanayo eziqaphela umsebenzi ofanayo zibizwa ngokuba yimodyuli, amacandelo kwimodyuli yesekethe kufuneka athathe umgaqo wogxininiso olusondeleyo, kunye nesekethe yedijithali kunye nesekethe ye-analog kufuneka ihlulwe;
2. Izixhobo kunye nezixhobo kufuneka zixhonywe ngaphakathi kwe-1.27mm malunga nemingxuma enganyukiyo efana nemingxuma yokubeka kunye nemingxuma eqhelekileyo, kwaye akukho zixhobo ziya kufakwa ngaphakathi kwe-3.5mm (ye-M2.5) kunye ne-4mm (ye-M3) malunga nemingxuma efana izikrufu
3. Kuphephe ukubeka vias ngezantsi amacandelo ezifana resistors exhonyiweyo ngokuthe tye, inductors (plug-ins), kunye capacitors electrolytic ukuphepha iisekethe ezimfutshane phakathi vias kunye necandelo iqokobhe emva soldering amaza;
4. Umgama phakathi komphandle wecandelo kunye nomda webhodi ngu-5mm;
5. Umgama phakathi komphandle wepadi yecandelo elixhonyiweyo kunye nomphandle wecandelo elixhonyiweyo elisondeleyo lingaphezulu kwe-2mm;
6. Amacandelo e-metal shell kunye neentsimbi (iibhokisi zokukhusela, njl.) azikwazi ukuchukumisa ezinye izinto, kwaye azikwazi ukusondela kwimigca eprintiweyo kunye neepads, kwaye isithuba kufuneka sibe ngaphezu kwe-2mm.Ubungakanani bemingxuma yokubeka, imingxuma yokufaka i-fastener, imingxuma e-elliptical kunye nezinye izikwere zesikwere kwi-plate inkulu kune-3mm ukusuka kumda weplate;
7. Into yokufudumala ayikwazi ukusondela kwintambo kunye ne-thermal element;i-high-heating element kufuneka ihanjiswe ngokulinganayo;
8. Isiseko sombane kufuneka silungiselelwe malunga nebhodi eprintiweyo kangangoko kunokwenzeka, kwaye iiterminals zebhasi eziqhagamshelwe kwisiseko sombane kufuneka zilungiswe kwicala elinye.Unonophelo olukhethekileyo kufuneka luthatyathwe ukuba lungacwangciswanga iziseko zamandla kunye nezinye izihlanganisi ezithengiswayo phakathi kweziqhagamshelo, ukwenzela ukuba kube lula ukuthengiswa kwezi zixhobo kunye nezixhumi, kunye noyilo kunye nokubotshwa kweentambo zombane.Ukucwangciswa kwezithuba zombane kunye nezixhumi ze-welding kufuneka ziqwalaselwe ukuququzelela ukufakwa kunye nokususwa kweeplagi zamandla;
9. Ulungiselelo lwamanye amacandelo:
Zonke iinqununu ze-IC zilungelelaniswa ngokuzimeleyo, i-polarity yamacandelo e-polar imakishwe ngokucacileyo, kunye nokumakishwa kwe-polarity kwibhodi eprintiweyo efanayo akufanele kube ngaphezu kweendlela ezimbini.Xa izikhombisi-ndlela ezimbini zivela, la macala mabini axhomekeke kwelinye;
10. Iingcingo ebhodini kufuneka zibe dense ngokufanelekileyo.Xa ukuhlukana kobuninzi kukhulu kakhulu, kufuneka kuzaliswe nge-foil ye-mesh yethusi, kwaye umnatha kufuneka ube mkhulu kune-8mil (okanye 0.2mm);
11. Akufuneki kubekho imingxunya kwi-patch pads, ukwenzela ukuba ugweme ukulahleka kwe-solder paste kwaye kubangele ukuba amacandelo athengiswe.Imigca yesignali ebalulekileyo ayivumelekanga ukuba idlule phakathi kwezikhonkwane zesokhethi;
12. Isiqwenga silungelelaniswe ngokulinganayo, isalathiso somlinganiswa siyafana, kwaye indlela yokupakisha iyafana;
13. Kwizixhobo ezine-polarity, isalathiso sokumakisha i-polarity kwibhodi enye kufuneka ihambelane ngokusemandleni.

PCB Component Routing Rules

1. Kwindawo apho indawo yocingo ingaphantsi okanye ilingana ne-1mm ukusuka kumda wePCB, kwaye ngaphakathi kwe-1mm ejikeleze umngxuma wokunyuka, i-wiring ayivunyelwe;
2. Intambo yombane kufuneka ibe banzi kangangoko kwaye ingabi ngaphantsi kwe-18mil;ububanzi bomgca wesignali akufunekanga bube ngaphantsi kwe-12mil;i-CPU yegalelo kunye nemigca yemveliso akufanele ibe ngaphantsi kwe-10mil (okanye i-8mil);isithuba somgca akufuneki sibe ngaphantsi kwe-10mil;
3. Indlela eqhelekileyo yokudlula ayikho ngaphantsi kwe-30mil;
4. Dual in-line: pad 60mil, indawo yokuvula 40mil;
I-1/4W i-resistor: 51 * 55mil (i-0805 yokunyuka kwendawo);xa ukwi-line, iphedi yi-62mil, kunye ne-aperture yi-42mil;
I-Electrodeless capacitor: 51 * 55mil (0805 ukuphakama kwendawo);xa iplagwe ngokuthe ngqo, i-pad yi-50mil, kunye ne-aperture yi-28mil;
5.Qaphela ukuba ucingo lwamandla kunye nocingo lomhlaba kufuneka lube njenge-radial kangangoko kunokwenzeka, kwaye ucingo lwesignali alufanele lufakwe.

Umboniso womzi-mveliso