Gold Finger
Pakombiyuta memory sticks uye makadhi emifananidzo, tinogona kuona mutsara wegoridhe conductive contacts, izvo zvinonzi "zvigunwe zvegoridhe". Iyo Goridhe Finger (kana Edge Connector) muPCB dhizaini uye indasitiri yekugadzira inoshandisa chinongedzo chekubatanidza senzira yekubudisira bhodhi rekubatanidza kunetiweki. Tevere, ngatinzwisise maitiro ekuita nezvigunwe zvegoridhe muPCB uye zvimwe zvinhu.
Surface kurapwa nzira yegoridhe chigunwe PCB
1. Electroplating nickel goridhe: ukobvu kusvika 3-50u”, nekuda kwepamusoro conductivity, oxidation kuramba uye kusapfeka, inoshandiswa zvakanyanya mumaPCB emunwe wegoridhe anoda kugara achiiswa uye kubviswa kana mabhodhi ePCB anoda kazhinji mechanical friction Pamusoro, asi nekuda kwekudhura kwekunanzva kwegoridhe, rinongoshandiswa pakunamira goridhe zvishoma seminwe yegoridhe.
2. Goridhe yakanyudzwa: Ukobvu hwakajairwa 1u”, kusvika ku3u” nekuda kwehunhu hwayo hwepamusoro, kupfava uye kutengeswa, inoshandiswa zvakanyanya mumabhodhi ePCB epamusoro-soro ane mabhatani enzvimbo, akasungirirwa IC, BGA, nezvimwewo. ine yakaderera kupfeka kuramba zvinodiwa inogona zvakare kusarudza iyo yese bhodhi kunyudza goridhe maitiro. Mutengo wekunyudzwa kwegoridhe process wakaderera zvakanyanya pane weiyo electro-goridhe process. Ruvara rweImmersion Gold igoridhe yero.
Kugadziriswa kwemunwe wegoridhe muPCB
1) Kuti uwedzere kupfekedzwa kwezvigunwe zvegoridhe, zvigunwe zvegoridhe zvinowanzoda kuiswa negoridhe rakaoma.
2) Zvigunwe zvegoridhe zvinoda kucheneswa, kazhinji 45 °, mamwe makona akadai 20 °, 30 °, etc. Kana pasina chamfer mukugadzira, pane dambudziko; iyo 45 ° chamfer muPCB inoratidzwa pamufananidzo uri pazasi:
3) Chigunwe chegoridhe chinoda kurapwa sechimedu chese solder mask kuti uzarure hwindo, uye PIN haidi kuvhura mesh yesimbi;
4) Kunyudza tin uye sirivheri kunyudzwa mapadhi anofanirwa kunge ari padiki chinhambwe che14mil kubva pamusoro pemunwe; zvinokurudzirwa kuti padhi inopfuura 1mm kure nemunwe panguva yekugadzira, kusanganisira kuburikidza nemapedhi;
5) Usawaridza mhangura pamusoro pemunwe wegoridhe;
6) Zvose zvikamu zvemukati wemunwe wegoridhe zvinoda kuchekwa mhangura, kazhinji hupamhi hwemhangura yakachekwa ndeye 3mm yakakura; inogona kushandiswa kwehafu-munwe wakachekwa mhangura uye chigunwe chose chakacheka mhangura.
“Ndarama” yeminwe yendarama indarama here?
Kutanga, ngatinzwisisei pfungwa mbiri: goridhe rakapfava negoridhe rakaomarara. Ndarama yakapfava, kazhinji goridhe rakapfava. Ndarama yakaoma kazhinji musanganiswa wegoridhe rakaomarara.
Basa guru remunwe wegoridhe nderekubatanidza, saka inofanira kuva nemagetsi akanaka emagetsi, kupfeka kusagadzikana, oxidation resistance uye corrosion resistance.
Nekuda kwekuti magadzirirwo egoridhe rakachena (goridhe) akapfava, zvigunwe zvegoridhe hazviwanzo shandisa goridhe, asi chikamu che "goridhe chakaomarara (goridhe musanganiswa)" chinoiswa pairi, iyo isingangogone kuwana yakanaka conductivity yegoridhe, asi. itawo kuti isarambe Abrasion performance uye oxidation kuramba.
Saka PCB yakashandisa “goridhe nyoro”? Mhinduro ndeyechokwadi kune kushandiswa, senge yekubata kumeso kwemamwe mabhatani enharembozha, COB (Chip On Board) ine aluminiyamu waya uye zvichingodaro. Iko kushandiswa kwegoridhe rakapfava kunowanzo kuisa nickel goridhe pane redunhu bhodhi ne electroplating, uye ukobvu hwayo hunodzora hunoshanduka.