Njengengxenye yesekethe kagesi, ukubaluleka kwe- ibhodi yesifunda ephrintiwe kukhuphuke kakhulu. Kunemigomo eminingi yokuzikhethela amaphrojekthi. Kepha izinketho ezisuselwa ekuqedeni komphezulu zithola ukuthandwa. Isiphetho se-Surface ukumboza okwenziwe kusendlalelo esingaphandle se-PCB. Ukwelashwa ngaphezulu kufeza imisebenzi emibili – ukuvikela isifunda sethusi nokusebenza njengendawo eshisayo phakathi nomhlangano we-PCB. Kunezinhlobo ezimbili eziyinhloko zokuphela komhlaba: i-organic ne-metallic. Lo mbhalo ukhuluma ngokwelashwa okuphezulu kwensimbi ye-PCB – i-PCBS efakwe igolide.

Qonda i-PCB enegolide engqimba engu-4

I-4-layer PCB iqukethe izingqimba ezi-4 ze-FR4 substrate, 70 um gold kanye no-0.5 OZ to 7.0 OZ thick substrate copper. Usayizi wembobo omncane ngu-0.25mm kanti ithrekhi / iphimbo elincane lingu-4Mil.

Izendlalelo ezincane zegolide zazimbozwa ku-nickel zabe sezithunyelwa ethusi. I-Nickel isebenza njengomgoqo wokusabalalisa phakathi kwethusi negolide futhi ibavimbela ekuxubeni. Igolide liyancibilika ngesikhathi sokushisela. I-Nickel imvamisa iphakathi kuka-100 no-200 ama-microinches aminyene negolide phakathi kwama-microinches ama-2 no-4 awugqinsi.

Isingeniso ezindleleni ze-plating yegolide ku-PCB

Ukumbozwa kufakwa ebusweni bezinto ze-FR4 ngokusabela okubhekwe kakhulu kwamakhemikhali. Ngaphezu kwalokho, ukumbozwa kusetshenziswa ngemuva kokufakwa kokumelana nokucibilika. Kwezinye izimo, noma kunjalo, ukumbozwa kusetshenziswa ngaphambi kokushisela, kepha lokhu akuvamile. Le ngubo ibiza kakhulu kunezinye izinhlobo zokumbozwa kwensimbi. Ngoba ukumbozwa kwenziwa ngamakhemikhali, kubizwa ngokuthi yi-chemical nickel leaching (ENIG).

Ukusetshenziswa kwezendlalelo ezine ze-ENIG PCB

Lawa ma-PCBS asetshenziselwa ukuhlelwa kwegridi yebhola (i-BGA) namadivayisi wokukhweza ebusweni (i-SMD). Igolide libhekwa njengomqhubi omuhle kagesi. Kungakho izinsizakalo eziningi zemihlangano yesifunda zivame ukusebenzisa lolu hlobo lokwelashwa kwendawo kumasekethe amakhulu kakhulu.

Izinzuzo zokwelashwa kwendawo yegolide elicwilile

Izinzuzo ezilandelayo zokuqedwa okufakwe ngegolide kuzenza zithandwa kakhulu ezinsizakalweni zomhlangano kagesi.

Ukufakwa okubonakalayo njalo akudingeki.

Umjikelezo we-reflux uyaqhubeka.

Nikeza amandla wokuhlola kagesi amahle kakhulu

Ukunamathela okuhle

Inikeza ukugoqa okuvundlile kuzungeze amasekethe namaphedi.

Izindawo ezicwilisiwe zinikeza isicaba esihle kakhulu.

Can weld umugqa.

Landela izindlela zokuhlola ezivivinywe isikhathi.