I-SMT pad design iyingxenye ebaluleke kakhulu PCB umklamo. Inquma indawo yokudayiswa kwezingxenye ku-PCB, ukwethembeka kwamalungu e-solder, ukukhubazeka okungenzeka ngesikhathi sokudayiswa, ukucaca, ukuqinisekiswa nokugcinwa kokulinda ukudlala indima ebalulekile. Uma idizayini yephedi ye-PCB ilungile, inani elincane le-skew ngesikhathi sokukhwezwa lingalungiswa ngenxa yomphumela wokuzilungisa we-tension surface ye-solder encibilikisiwe ngesikhathi sokuphinda kufakwe i-solder. Ngokuphambene nalokho, uma idizayini yephedi ye-PCB ingalungile, noma ngabe indawo yokubeka inembe kakhulu, kuzoba nokukhubazeka kokudayiswa okufana nokugudluzwa kwengxenye kanye netshe lethuna ngemva kokufakwa kabusha kwe-solder. Ngakho-ke, ukwakheka kwephedi kungenye yezinto ezibalulekile ezinquma ukwenziwa kwezingxenye zokukhweza ngaphezulu. Amaphedi avamile “ayisifo esivamile kanye nesifo esivame ukwenzeka” ekwakhiweni kwe-PCB, futhi kungenye yezinto eziyinhloko ezidala izingozi ezifihliwe kukhwalithi yokudayiswa kwe-PCB.

Iyini imiphumela yamaphedi avamile kukhwalithi yokunamathisela ye-PCB

1. Ngemuva kokuthi izingxenye ze-chip zithengiswe ku-pad efanayo, uma izingxenye ze-plug-in zephini noma i-wiring zithengiswa futhi, kunengozi efihlekile ye-soldering yamanga ngesikhathi se-soldering yesibili.

2. Inani lokulungiswa ngesikhathi sokugunyazwa okulandelayo, ukuhlolwa kanye nokugcinwa kokuthengiswa ngemuva kokuthengisa kunqunyelwe.

3. Lapho kulungiswa, unsoldering ingxenye, izingxenye ezizungezile pad efanayo zonke unsoldered.

4. Uma i-pad isetshenziswa ngokujwayelekile, ukucindezeleka ku-pad kukhulu kakhulu, okubangela ukuba i-pad iqhume ngesikhathi se-soldering.

5. Iphedi elifanayo labelwe phakathi kwezingxenye, inani lethini likhulu kakhulu, ukungezwani kwendawo ku-asymmetric ngemva kokuncibilika, izingxenye zidonselwa ohlangothini olulodwa, okubangela ukufuduka noma amatshe amathuna.

6. Ngokufanayo nokusetshenziswa okungeyona okujwayelekile kwamanye ama-pads, isizathu esiyinhloko ukuthi izici zesifunda kuphela zicatshangelwa futhi indawo noma isikhala silinganiselwe, okuholela ekufakweni okuningi kwengxenye kanye nokukhubazeka okuhlangene kwe-solder ekuhlanganiseni nasekushiseleni inqubo. , okuthinta ekugcineni ukuthembeka kwesifunda. Umthelela omkhulu.