Njengenxalenye yesekethe ye-elektroniki, ukubaluleka kwe- ibhodi yesekethe eprintiweyo lonyuswe kakhulu. Kukho iindlela ezininzi zokukhetha iiprojekthi. Kodwa ukhetho ngokusekwe kumphezulu womhlaba luyafumana ukuthandwa. Umphezulu wokugqiba kukutyabeka okwenziwe kwinqanaba elingaphandle le-PCB. Unyango lomphezulu lufezekisa imisebenzi emibini-ukukhusela isekethe yobhedu kunye nokusebenza njengomphezulu odibeneyo ngexesha lendibano ye-PCB. Zimbini iintlobo eziphambili zokugqitywa komphezulu: i-organic kunye ne-metallic. Eli nqaku lixoxa ngonyango lwentsimbi oludumileyo lwe-PCB-i-PCBS ekhulelweyo.

Qonda i-PCB engama-4 yomaleko wegolide

I-4-layer PCB ineziqendu ezi-4 ze-FR4 substrate, i-70 um yegolide kunye ne-0.5 OZ ukuya kwi-7.0 OZ substrate yobhedu. Ubuncinci bomngxuma ubungakanani yi-0.25mm kwaye ubuncinci betrekhi / inowuthi yi-4Mil.

Imigca emincinci yegolide yatyatyekwe nge-nickel emva koko yaya kubhedu. I-Nickel isebenza njengomqobo phakathi kobhedu negolide kwaye iyabathintela ekuxubeni. Igolide inyibilika ngexesha lokudibanisa. I-Nickel ihlala iphakathi kwe-100 kunye ne-200 ye-microinches encinci kunye negolide phakathi kwe-2 kunye ne-4 ye-microinches.

Intshayelelo kwiindlela zokufakwa kwegolide kwi-PCB

Ukutyabeka kufakwa kumphezulu wezinto ze-FR4 ngokuphendula ngokusondeleyo kokubekwa kweliso. Ngapha koko, ukutyabeka kusetyenziswa emva kokuxhathisa ukuhamba. Kwezinye iimeko, nangona kunjalo, ukutyabeka kusetyenziswa ngaphambi kokudibanisa, kodwa oku kunqabile. Esi simbo sokubiza sibiza kakhulu kunezinye iintlobo zento yokuhombisa ngentsimbi. Ngenxa yokuba ukutyabeka kwenziwa ngekhemikhali, kubizwa ngokuba yi-chemical nickel leaching (ENIG).

Ukusetyenziswa kwamanqanaba amane e-ENIG PCB

Ezi PCBS zisetyenziswa kulungelelwaniso lwegridi yebhola (i-BGA) kunye nezixhobo zokuphakama komphezulu (SMD). Igolide ithathwa njengomqhubi wombane olungileyo. Kungenxa yoko le nto uninzi lweenkonzo zendibano yesekethe zihlala zisebenzisa olu hlobo lonyango lonyango lweesekethe ezixineneyo.

Izinto eziluncedo ngonyango lomphezulu wegolide itshonile

Ezi zinto zilungileyo zilandelayo zenziwe ngegolide ezigqityiweyo zibenza bathandwe kakhulu kwinkonzo zombane.

Ukutyabeka rhoqo akufuneki.

Umjikelo we-reflux uyaqhubeka.

Nika amandla okuvavanya umbane ogqwesileyo

Ukubambelela kakuhle

Ukubonelela ngesangqa esithe tyaba malunga neesekethe kunye neepads.

Imimandla efakwe emanzini inikezela ngokuthe tye.

Ngaba umgca welding.

Landela iindlela zesicelo ezivavanywe ixesha.