Chala Chagolide
Pa ma memory sticks apakompyuta ndi makadi ojambula, timatha kuwona mzere wa zolumikizira zagolide, zomwe zimatchedwa "zala zagolide". Gold Finger (kapena Edge Connector) mu PCB yopanga ndi kupanga makampani amagwiritsa ntchito cholumikizira cholumikizira ngati cholumikizira bolodi kuti ilumikizane ndi netiweki. Kenako, tiyeni timvetsetse momwe tingachitire ndi zala zagolide mu PCB ndi zina.
Njira yothandizira pamwamba pa PCB ya chala chagolide
1. Electroplating faifi tambala golide: makulidwe mpaka 3-50u”, chifukwa cha madulidwe apamwamba, kukana makutidwe ndi okosijeni ndi kuvala kukana, chimagwiritsidwa ntchito golide chala PCBs kuti amafuna kuika pafupipafupi ndi kuchotsa kapena PCB matabwa amene amafuna pafupipafupi mawotchi mikangano Pamwambapa, koma chifukwa cha kukwera mtengo kwa golide plating, amangogwiritsiridwa ntchito kuyika golide pang'ono monga zala zagolide.
2. Kumizidwa golide: makulidwe ndi ochiritsira 1u”, mpaka 3u” chifukwa cha madulidwe apamwamba, flatness ndi solderability, chimagwiritsidwa ntchito mwatsatanetsatane mkulu-mwatsatanetsatane PCB matabwa ndi maudindo mabatani, womangidwa IC, BGA, etc. Gold chala PCBs ndi zofunika otsika avale kukana akhoza kusankha lonse bolodi kumizidwa ndondomeko golide. Mtengo wa ndondomeko yomiza golide ndi yotsika kwambiri kuposa njira ya electro-golide. Mtundu wa Immersion Gold ndi wachikasu chagolide.
Gold finger details processing mu PCB
1) Kuti muwonjezere kukana kwa zala za golide, zala za golide nthawi zambiri zimafunika kuti zikhale ndi golide wolimba.
2) Zala zagolide ziyenera kugwedezeka, kawirikawiri 45 °, ma angles ena monga 20 °, 30 °, etc. Ngati palibe chamfer mu mapangidwe, pali vuto; 45 ° chamfer mu PCB ikuwonetsedwa pachithunzi pansipa:
3) Chala chagolide chiyenera kuchitidwa ngati chigoba chonse cha solder kuti mutsegule zenera, ndipo PIN siyenera kutsegula zitsulo zachitsulo;
4) Mivi ya malata ndi zomizidwa zasiliva ziyenera kukhala pamtunda wa 14mil kuchokera pamwamba pa chala; tikulimbikitsidwa kuti padyo ikhale yoposa 1mm kutali ndi chala panthawi ya mapangidwe, kuphatikizapo kudzera pa mapepala;
5) Osayala mkuwa pamwamba pa chala chagolide;
6) Zigawo zonse za mkati mwa chala chagolide ziyenera kudulidwa mkuwa, kawirikawiri m'lifupi mwake mkuwa wodulidwa ndi 3mm wamkulu; itha kugwiritsidwa ntchito ngati mkuwa wodula chala-theka ndi chala chonse chodula mkuwa.
Kodi “golide” wa zala zagolide ndi golide?
Choyamba, tiyeni timvetsetse mfundo ziwiri: golide wofewa ndi golide wolimba. Golide wofewa, nthawi zambiri golide wofewa. Golide wolimba nthawi zambiri amakhala ndi golide wolimba kwambiri.
Ntchito yaikulu ya chala cha golide ndikugwirizanitsa, choncho iyenera kukhala ndi magetsi abwino, kukana kuvala, kukana kwa okosijeni ndi kukana kwa dzimbiri.
Chifukwa mawonekedwe a golide woyenga (golide) ndi wofewa, zala za golide nthawi zambiri sizigwiritsa ntchito golide, koma ndi gawo la "golide wolimba (golide)" lomwe limapangidwa ndi electroplated, lomwe silingangopeza golide wabwino, komanso. imapangitsanso kuti ikhale yosagwira ntchito ya Abrasion komanso kukana kwa okosijeni.
Ndiye kodi PCB yagwiritsa ntchito “golide wofewa”? Yankho ndiloti pali ntchito, monga malo okhudzana ndi mabatani a foni yam'manja, COB (Chip On Board) ndi waya wa aluminiyamu ndi zina zotero. Kugwiritsa ntchito golide wofewa nthawi zambiri kumakhala kuyika golide wa nickel pa bolodi yozungulira ndi electroplating, ndipo kuwongolera kwake kumakhala kosavuta.