Buku Lotsogolera ndi Kukonza Zala Zagolide za PCB

Gold Finger PCB ndi mtundu wapadera wa bolodi losindikizidwa, lomwe limagwiritsidwa ntchito kwambiri m'mapulogalamu omwe amafunikira kudalirika kwambiri komanso kusawonongeka, monga ma motherboard apakompyuta, makadi ojambula zithunzi ndi zida zina zamagetsi. Nkhaniyi ifotokoza tanthauzo, njira zochizira pamwamba komanso malingaliro a kapangidwe ka ma PCB a zala zagolide.

Buku la Nkhani

Ⅰ. Tanthauzo la Chala cha Golide

II. Njira zomaliza pamwamba pa PCB zala zagolide

III. Malangizo Oteteza Kupangidwa kwa Zala za Golide

IV. Malangizo Othandizira Kukonza Zala Zagolide

Mafunso ndi mayankho omwe amafunsidwa kawirikawiri

1. Tanthauzo la Chala cha Golide
Chala chagolide, chomwe chimadziwikanso kuti cholumikizira cha m'mphepete, ndi chipangizo chomwe chimalowetsa mbali imodzi ya PCB mu cholumikizira. Chimagwiritsa ntchito mapini olumikizira ngati njira yotulutsira kulumikizana kwakunja kwa PCB kuti chikwaniritse kuyendetsa pakati pa solder pad kapena pepala lamkuwa ndi mapini ofananira. Kuti chiwonjezere kuyendetsa kwake, kukana kwa okosijeni komanso kukana kukalamba, zala zagolide nthawi zambiri zimayikidwa ndi nickel gold plating kapena ENIG. Chifukwa cha mawonekedwe ake ofanana ndi chala, chimatchedwa Gold Finger.
2. Njira zomaliza pamwamba pa PCB zala zagolide
Njira yomaliza pamwamba ya Gold Finger PCB ndi yofunika kwambiri pakugwira ntchito kwake komanso malo ogwiritsira ntchito. Izi ndi njira ziwiri zodziwika bwino:
1) Kupaka kwa Golide wa Nikeli
Kupaka golide wa nickel ndi njira yodziwika bwino yomaliza pamwamba, ndipo makulidwe ake amatha kufika mainchesi 3-50. Ili ndi mphamvu yabwino kwambiri yoyendetsera mpweya, kukana okosijeni komanso kukana kuwonongeka, kotero imagwiritsidwa ntchito kwambiri pa ma PCB a zala zagolide omwe amafunika kuyikidwa ndi kuchotsedwa pafupipafupi kapena ma PCB omwe amafunikira kukangana kwamakina pafupipafupi. Komabe, chifukwa cha mtengo wokwera wa golide, kupaka golide wa nickel nthawi zambiri kumagwiritsidwa ntchito pochiza madera am'deralo monga zala zagolide. Pamwamba pa njira iyi yomaliza pamwamba ndi yoyera siliva, koma kuthekera kwake kosungunulira ndi kochepa pang'ono.
2) GWIRIZANANI
ENIG ndi njira ina yodziwika bwino yomaliza pamwamba, yokhala ndi makulidwe a mainchesi 1 ndi mainchesi 3. ENIG ili ndi mphamvu yabwino kwambiri yoyendetsera zinthu, kusalala kwa pamwamba komanso kuthekera kosungunula zinthu, zomwe zimapangitsa kuti igwiritsidwe ntchito kwambiri mu ma PCB olondola kwambiri okhala ndi mapangidwe monga keyway, bound IC, BGA, ndi zina zotero. Pa ma PCB agolide omwe safuna kukana kuwonongeka kwambiri, njira yonse ya ENIG ingasankhidwenso, yomwe ili ndi mtengo wotsika kwambiri. Pamwamba pa ENIG yomalizidwa ndi chikasu chagolide.
3. Malangizo Oteteza Kujambula Zala Zagoliden
Pakupanga PCB ya chala chagolide, pali mfundo zofunika kuziganizira kwambiri:
1) Kukana kwa kuvala kwa chala chagolide
Kwa ma PCB omwe amafunika kuyikidwa ndi kuchotsedwa pafupipafupi, kuti zala zagolide zisamawonongeke, nthawi zambiri zimakhala zofunikira kugwiritsa ntchito electroplating yolimba yagolide.
2) Kugundana kwa chala chagolide
Zala zagolide nthawi zambiri zimafuna kudulidwa, ndi ngodya yodulidwa ya 45°. Kupezeka kwa ma chamfer kungachepetse zoopsa zomwe zingachitike, monga momwe chithunzichi chikusonyezera.
3) Kutsegula zenera la chigoba cha solder
Chophimba cha chala chagolide chiyenera kuyikidwa pazenera lotseguka la chigoba chonse cha solder, popanda kufunika kwa ulusi wachitsulo.
4) Mtunda pakati pa chigoba chosungunula ndi chala chagolide
Mtunda pakati pa chogulitsira ndi chala chagolide uyenera kutsatira zomwe zafotokozedwa, nthawi zambiri umafuna kuti chogulitsira chikhale osachepera 1mm kuchokera pamalo a chala chagolide, kuphatikizapo kudzera mu chogulitsira.
5) Kumaliza kwa pamwamba pa chala chagolide
Pamwamba pa chala chagolide sipayenera kuphimbidwa ndi mkuwa.
6) Chithandizo chodula mkuwa
Zigawo zonse za mkati mwa chala chagolide zimafuna njira yodulira mkuwa, nthawi zambiri ndi m'lifupi mwake wa mkuwa wa pafupifupi 3mm. Izi zitha kuchepetsa kusiyana kwa impedance pakati pa chala chagolide ndi mzere wa impedance, komanso kupindulitsa ESD.
Zomwe zili pamwambapa ndi zinthu zingapo zomwe zimafunika chisamaliro chapadera popanga PCB ya chala chagolide kuti zitsimikizire kudalirika ndi magwiridwe antchito a chala chagolide.

4. Malangizo Othandizira Kukonza Zala Zagolide
Ngati mukufuna kugwiritsa ntchito PCB ya chala chagolide, zotsatirazi ndi njira zina zodzitetezera zomwe muyenera kutsata pokonza PCB ya Rich Full Joy:
1. Kuchuluka kwa PCB komwe kungadulidwe ndi 1.2mm mpaka 2.4mm. Ma PCB okhala ndi makulidwe omwe sali mkati mwa kuchuluka kumeneku sangathedulidwe.
2. Kuzama ndi ngodya ya m'mphepete mwa beveled nthawi zambiri zimakhala pakati pa 20° ndi 45°. Mtunda pakati pa chala chagolide ndi m'mphepete mwa PCB uyenera kukhala wokwanira, nthawi zambiri umalimbikitsidwa kukhala 0.6m mpaka 1.5mm, kuti usawononge chala chagolide.

Rich Full Joy imagwira ntchito yokonza ma PCB a zala zagolide kuti zitsimikizire kuti ndi zapamwamba komanso zodalirika. Njira yathu imatha kukwaniritsa zofunikira zosiyanasiyana pakupanga ndikupereka magwiridwe antchito abwino kwambiri pa ntchito yanu.

Ma PCB a golide chala amachita gawo lofunika kwambiri pamagetsi amakono, ndipo kudalirika kwawo ndi magwiridwe antchito ake kumadalira njira zomaliza pamwamba ndi tsatanetsatane wa kapangidwe. Mwa kusankha njira zoyenera zokonzera ndikusamalira zofunikira pakupanga, ndizotheka kuonetsetsa kuti ma PCB a golide chala amagwira ntchito bwino kwambiri pa ntchito zosiyanasiyana. Ngati mukufuna ntchito zapamwamba zokonzera ma PCB a golide chala, chonde ganizirani za Ruizhi Xinfeng, ndipo tidzakhala okondwa kukupatsani chithandizo.

Mafunso ndi Mayankho
1. Kodi PCB ya Golide Chala ndi chiyani?
Golide chala PCB ndi mtundu wapadera wa bolodi losindikizidwa, lomwe limagwiritsidwa ntchito kwambiri pakugwiritsa ntchito zamagetsi zomwe zimafuna kudalirika kwambiri komanso kukana kuwonongeka, lotchedwa mawonekedwe ake ofanana ndi chala.
2. Kodi njira zomaliza pamwamba pa PCB ya chala chagolide ndi ziti??
Njira zodziwika bwino zomaliza pamwamba pa PCB zala zagolide zimaphatikizapo electroplating yagolide wa nickel ndi ENIG, zomwe zili ndi ubwino ndi kugwiritsa ntchito kosiyana.
3. Kodi mungawonjezere bwanji kukana kwa chala chagolide?
Kuti zala zagolide zisamawonongeke, nthawi zambiri zimakhala zofunikira kugwiritsa ntchito electroplating yagolide wolimba kuti ziwongolere kuuma kwa pamwamba pake.
4. Ndi njira ziti zodzitetezera zomwe ziyenera kutengedwa popanga PCB ya chala chagolide?
Popanga PCB ya zala zagolide, ndikofunikira kulabadira nkhani zazikulu monga kuyika chamfering, kutsegula mawindo a chigoba cha solder, mtunda pakati pa solder pads ndi zala zagolide, komanso mawonekedwe a pamwamba pa zala zagolide.
5. Kodi mungatsimikizire bwanji mtundu wa PCB ya chala chagolide?
Timagwiritsa ntchito ukadaulo wapamwamba komanso kuwongolera bwino khalidwe kuti tipeze zinthu zabwino komanso zodalirika.