Kwiimemori zeekhompyuter kunye namakhadi emizobo, sinokubona umqolo weepleyiti zokuchukumisa zegolide, ezibizwa ngokuba “yiminwe yegolide”. In PCB uyilo kunye nemveliso yokuvelisa, umnwe weGolide, okanye isiQhagamsheli seEdge, isetyenziswa njengebhodi ephuma kwisihlanganisi seComputer. Okulandelayo, masiqonde indlela yokwenza kunye neenkcukacha zomnwe wegolide kwi-PCB.

Unyango lomphezulu we-Goldfinger PCB

I-1, i-electroplating nickel yegolide: ubukhulu ukuya kuthi ga kwi-3-50U “, ngenxa yokuqhuba kwayo okugqwesileyo, ukumelana ne-oxidation kunye nokunxiba ukunxiba, isetyenziswa ngokubanzi kwimfuno yokuhlala iplagi kwaye ikhuphe i-PCB ye-goldfinger okanye kufuneka iqhubeke ikwenza ukungqubana KWibhodi ye-PCB, kodwa ngenxa yexabiso eliphezulu lokuxhonywa kwegolide, isetyenziswa kuphela kwinkqubo yengubo yegolide yendawo efana negolide.

I-2, isinyithi esinzima, ubukhulu be-1 u “, ukuya kuthi ga ku-3” ngenxa yokuqhutywa kombane okuphezulu, ukutyibilika kunye nokuqina, zisetyenziswa ngokubanzi njengamaqhosha, ukubopha i-IC, uyilo lwe-BGA ye-PCB echanekileyo, i-PCB ye-goldfinger yokunxiba -imfuno yokusebenza enganyanzelekanga ayiphezulu, ikwanokukhetha ipleyiti yonke yenkqubo yezedoary, kunye nenkqubo yexabiso yinkqubo yegolide yombane indleko iphantsi kakhulu. Umbala wesinki yegolide ulubhelu ngegolide.

PCB iinkcukacha iinkcukacha ngomnwe

1) Ukonyusa ukungavumi kokunxiba kweminwe yegolide, iminwe yegolide ihlala ifuna ukutyatyekwa ngegolide elukhuni.

2) umnwe wegolide ufuna ukutyibilika, ihlala i-45 °, ezinye ii-angles ezinje nge-20 °, 30 °, njl. Ukuba akukho chamfering kuyilo, kukho ingxaki; I-45 ° chamfering kwi-PCB iboniswe ngezantsi:

I-3) umnwe wegolide kufuneka wenze yonke ibhloko yokuvala iwelding yokuvula inkqubo, i-PIN ayifuni ukuvula umnatha wentsimbi;

4) Owona mgama ubuncinci phakathi kwetink-sink kunye nepads-sink pads kunye nomphezulu womnwe yi-14mil; Kuyacetyiswa ukuba iphedi mayibe ngaphezulu kwe-1mm kude nomnwe, kubandakanya iphedi yokugqobhoza;

5) Musa ukubeka ubhedu kumphezulu womnwe;

6) Zonke iileya zomaleko wangaphakathi womnwe wegolide kufuneka zikhutshiwe, zihlala zibububanzi obuyi-3mm; Ngaba unokwenza isiqingatha sokukhuphela ngomnwe kunye nokukhuphela ngomnwe ngokupheleleyo.

D: Ngaba “igolide” yegolide yomnwe wegolide?

Okokuqala, masiqonde iikhonsepthi ezimbini: igolide ethambileyo negolide elukhuni. Igolide ethambileyo, ihlala ithambile. Igolide enzima, ihlala ikhompawundi yegolide eqinileyo.

Eyona ndima iphambili yomnwe wegolide kukudibanisa, ke kufuneka ibe nokuqhuba kakuhle kombane, ukunxiba ukumelana, ukumelana neoksijini, ukumelana nokubola.

Ngenxa yokuba igolide esulungekileyo (igolide) ithambile, iminwe yegolide ngokubanzi ayisebenzisi igolide, kodwa umaleko nje “wegolide elukhuni (ikhompawundi yegolide)”, engenakufumana kuphela ukuqhuba kakuhle kwegolide, kodwa ikwanokwenza ukuba inxibe ukuxhathisa. , ukumelana ne-oxidation.

Ngaba i-PCB ayisebenzisanga “igolide ethambileyo”? Impendulo iyasetyenziswa, enje ngomhlaba wonxibelelwano wezitshixo zefowuni ephathekayo, ucingo lwealuminiyam KWI-COB (Chip kwiBhodi). Ukusetyenziswa kwegolide ethambileyo ngokubanzi yimvula ye-nickel yegolide xa kusenziwa i-electroplating kwibhodi yesekethe, ulawulo lwayo lokuqina lukhulu kakhulu.