Gold Finger
Kwiimemori zekhompyuter kunye namakhadi emizobo, sinokubona uluhlu lwabafowunelwa begolide, ababizwa ngokuba "yiminwe yegolide". I-Gold Finger (okanye i-Edge Connector) kwi-PCB yokuyila kunye noshishino lokuvelisa isebenzisa umdibaniso wekhonkco njengendawo yokuphuma kwebhodi ukuxhuma kwinethiwekhi. Okulandelayo, makhe siqonde indlela yokujongana neminwe yegolide kwiPCB kunye neenkcukacha.
Indlela yonyango yomphezulu wePCB yomnwe wegolide
1. Igolide ye-nickel ye-electroplating: ubukhulu ukuya kwi-3-50u ", ngenxa ye-conductivity ephezulu, ukuxhathisa i-oxidation kunye nokumelana nokunxiba, isetyenziswa ngokubanzi kwi-PCB yeminwe yegolide efuna ukufakwa rhoqo kunye nokususwa okanye iibhodi ze-PCB ezifuna ukungqubana rhoqo ngoomatshini Ngaphezulu, kodwa ngenxa yexabiso eliphezulu lokutyabeka kwegolide, isetyenziselwa kuphela ukuhombisa ngokwenxalenye yegolide njengeminwe yegolide.
2. Igolide yokuntywiliselwa: Ubukhulu buqhelekileyo 1u ", ukuya kwi-3u" ngenxa ye-conductivity ephezulu, ukunyameka kunye nokuthengiswa kwayo, isetyenziswa ngokubanzi kwiibhodi ze-PCB ezichanekileyo ezinezikhundla zamaqhosha, i-IC edibeneyo, i-BGA, njl. ngeemfuno zokuxhathisa ukunxiba okuphantsi unokukhetha yonke inkqubo yokuntywiliselwa kwegolide yebhodi. Iindleko zenkqubo yegolide yokuntywiliselwa iphantsi kakhulu kunenkqubo ye-electro-gold. Umbala weImmersion Gold yigolide tyheli.
Ukusetyenzwa kweenkcukacha zomnwe wegolide kwiPCB
I-1) Ukuze ukwandise ukuxhatshazwa kweminwe yegolide, iminwe yegolide ngokuqhelekileyo kufuneka ifakwe ngegolide enzima.
2) Iminwe yegolide kufuneka ihlanjululwe, ngokuqhelekileyo i-45 °, ezinye ii-angles ezifana ne-20 °, 30 °, njl. Ukuba akukho chamfer kuyilo, kukho ingxaki; i-45° chamfer kwi-PCB ibonisiwe kumzobo ongezantsi:
3) Umnwe wegolide kufuneka uphathwe njengento yonke ye-mask solder ukuvula ifestile, kwaye i-PIN ayifuni ukuvula i-mesh yensimbi;
4) Itoti yokuntywilisela kunye neepads zokuntywiliselwa zesilivere kufuneka zibe kumgama ongaphantsi kwe-14mil ukusuka phezulu komnwe; kucetyiswa ukuba i-pad ingaphezulu kwe-1mm kude nomnwe ngexesha loyilo, kubandakanywa ngeepads;
5 uze ungasabi ubhedu phezu komnwe wegolide;
6) Zonke iileyile zoluhlu lwangaphakathi lomnwe wegolide kufuneka zisikwe ubhedu, ngokuqhelekileyo ububanzi bobhedu olusikiweyo luyi-3mm enkulu; ingasetyenziselwa ubhedu olusikwe ngomnwe wesiqingatha kunye nobhedu olusikiwe ngomnwe wonke.
Ngaba “igolide” yeminwe yegolide yigolide?
Okokuqala, masiqonde iikhonsepthi ezimbini: igolide ethambileyo kunye negolide eqinileyo. Igolide ethambileyo, igolide ethambileyo ngokubanzi. Igolide elukhuni ngokuqhelekileyo yimbumba yegolide eqina ngakumbi.
Umsebenzi oyintloko womnwe wegolide kukudibanisa, ngoko kufuneka ube ne-conductivity efanelekileyo yombane, ukuxhatshazwa kokugqoka, ukuxhathisa i-oxidation kunye nokuxhatshazwa kwe-corrosion.
Ngenxa yokuba ukuthungwa kwegolide esulungekileyo (igolide) kuthambile, iminwe yegolide ayisebenzisi igolide, kodwa kuphela umaleko "wegolide elukhuni (igolide ekhompawundi)" efakwe kuyo, engakwaziyo ukufumana igolide entle kuphela, kodwa kwakhona iyenze ixhathise ukusebenza kweAbrasion kunye nokumelana ne-oxidation.
Ngaba iPCB isebenzise “igolide ethambileyo”? Impendulo ngokuqinisekileyo kukho ukusetyenziswa, njengendawo yoqhagamshelwano yamanye amaqhosha efowuni ephathwayo, COB (Chip On Board) ngocingo lwe-aluminium kunye nokunye. Ukusetyenziswa kwegolide ethambileyo ngokuqhelekileyo kukubeka igolide ye-nickel kwibhodi yesekethe nge-electroplating, kwaye ulawulo lwayo lobunzima luguquguqukayo.