Ma ke ʻano he kikowaena uila, ka mea nui o papa kaapuni i paʻi ʻia ua hoʻonui nui ʻia. Nui nā pae hoʻohālikelike no ke koho ʻana iā lākou no nā papahana. Akā ʻo nā koho i kau ʻia ma ka hopena o ka pae e loaʻa nei ka kaulana. ʻO ka hoʻopau o ka uhi ka hana ʻia ma ka papa waho loa o ka PCB. Hoʻopau ka lapaʻau ʻana i ʻelua mau hana – pale i ke kaapuni keleawe a lawelawe ʻia ma ke ʻano he weldable ʻili i ka hui PCB. Aia he ʻano nui ʻelua o ka hoʻopau pae: meaola a mea hao. Kūkākūkā kēia ʻatikala i kahi hoʻomaʻamaʻa honua PCB metala kaulana – PCBS gula-impregnated.

Hoʻomaopopo i ka 4-layer PCB gula-gula

Aia ka 4-layer PCB i nā papa 4 o FR4 substrate, 70 um gula a me 0.5 OZ a i ka 7.0 OZ paona keleawe mānoanoa. ʻO ka nui o ka lua liʻiliʻi ʻo 0.25mm a ʻo ka track minimum / track ʻo 4Mil.

Hoʻopili ʻia ka lahilahi o ke gula ma ka nickel a laila ma ke keleawe. Hana ʻo Nickel i mea pale diffusion ma waena o ke keleawe a me ke gula a pale iā lākou i ka huikau. Hoʻopau ke gula i ka wā o ka hao. ʻO ka maʻamau ʻo Nickel ma waena o 100 a me 200 microinches mānoanoa a me ke gula ma waena o 2 a me 4 microinches mānoanoa.

Hoʻolauna i nā hana o ka plating gula ma PCB

Waiho ʻia ka uhi ma luna o ka FR4 e kahi hopena kemika i nānā pono ʻia. Eia kekahi, hoʻopili ʻia ka uhi ma hope o ka hoʻopili ʻana o ka flux resist. I kekahi mau hihia, akā, hoʻopili ʻia ka uhi ma mua o ka hoʻopili ʻana, akā kākaʻikahi loa kēia. ʻOi aku ka pipiʻi o kēia uhi ma mua o nā ʻano o nā pale kila. Ma muli o ka hana kolo ʻana i ka uhi, kapa ʻia ia mea he nickel leaching (ENIG).

Hoʻohana o ʻehā mau papa o ENIG PCB

Hoʻohana ʻia kēia mau PCBS i nā hoʻonohonoho kinipōpō kinipōpō (BGA) a me nā hāmeʻa e kau ana i luna (SMD). Ua manaʻo ʻia ke gula he alakaʻi maikaʻi o ka uila. ʻO kēia ke kumu o ka lawelawe ʻana o nā lawelawe kaapuni uila he nui i kēia ʻano lapaʻau o luna no nā kaapuni kiʻekiʻe.

ʻO nā mea maikaʻi o ka mālama pono ʻana i ke gula sunken

ʻO nā mea e pono ai o ka hoʻopau gula-impregnated e kaulana loa lākou i nā lawelawe hui uila.

ʻAʻole koi ʻia ka plating virtual virtual pinepine.

Hoʻomau ka pōʻaiapuni reflux.

Hāʻawi i ka hiki ke hoʻokolohua uila maikaʻi loa

Hoʻopili maikaʻi

Hāʻawi i ka plating ākea a puni nā kaʻa a me nā pads.

Hāʻawi nā papa hele i lalo i kahi pālahalaha maikaʻi loa.

Hiki ke laina laina.

E hāhai i nā ʻano noi noi hoʻāʻo manawa.