Izindlela zokuhlola eziyisithupha ze-PCB ibhodi yesifunda esifushane

1. Vula umdwebo wedizayini ye-PCB kukhompuyutha, khanyisa inethiwekhi ejikelezayo, bese ubona ukuthi ikuphi okuseduzane, okulula ukuxhuma kukho. Naka ngokukhethekile isifunda esifushane ngaphakathi kwe-IC.

2. Uma kuwukushisela ngezandla, hlakulela umkhuba omuhle:

I-1) Ngaphambi kokudayiswa, hlola ibhodi le-PCB ngokubukeka, futhi usebenzise i-multimeter ukuze uhlole ukuthi amasekhethi abalulekile (ikakhulukazi amandla kanye nomhlabathi) ane-circuited emfushane;

2) Njalo lapho i-chip idayiswa, sebenzisa i-multimeter ukuze uhlole ukuthi ukunikezwa kwamandla kanye nomhlabathi kufushane;

3) Ungajikijeli i-soldering iron ngokungahleliwe lapho u-soldering. Uma uphonsa i-solder ezinyaweni ze-solder ze-chip (ikakhulukazi izingxenye ze-surface mount), ngeke kube lula ukuyithola.

3. Kutholakala isifunda esifushane. Thatha ibhodi ukuze usike umugqa (ikakhulukazi ofanele amabhodi anengqimba eyodwa/ekabili), bese unika amandla ingxenye ngayinye yebhulokhi esebenzayo ngokuhlukana futhi uyiqede isinyathelo ngesinyathelo.

4. Sebenzisa ithuluzi lokuhlaziya indawo yesifunda esifushane

5. Uma kukhona i-chip ye-BGA, njengoba zonke izihlanganisi ze-solder zimbozwe yi-chip futhi azibonakali, futhi ibhodi le-multi-layer (ngaphezu kwezingqimba ezi-4), kungcono ukuhlukanisa ukunikezwa kwamandla kwe-chip ngayinye ngesikhathi. idizayini, kusetshenziswa ubuhlalu obukazibuthe noma uxhumano lwe-Resistor elingu-0 ohms, ngakho-ke uma kunomjikelezo omfushane phakathi kokunikezwa kwamandla nomhlabathi, ukutholwa kobuhlalu obuzibuthe kuyanqanyulwa, futhi kulula ukuthola i-chip ethile. Ngenxa yokuthi i-welding ye-BGA inzima kakhulu, uma ingafakwanga ngokuzenzakalelayo ngumshini, ukunganaki okuncane kuzonciphisa ukunikezwa kwamandla okuseduze kanye nomhlabathi amabhola amabili e-solder.

6. Qaphela lapho uthengisa ama-capacitor angaphezulu kosayizi omncane, ikakhulukazi ama-capacitor okuhlunga amandla (103 noma 104), angabangela kalula isekethe emfushane phakathi kokunikezwa kwamandla kanye nomhlabathi. Yiqiniso, ngezinye izikhathi ngenhlanhla, i-capacitor ngokwayo ifushane, ngakho-ke indlela engcono kakhulu yokuhlola i-capacitor ngaphambi kokushisela.