ʻO ke keleawe kekahi o nā metala maʻalahi loa ma ka honua. ʻO kona mau waiwai kūikawā e kūpono ai no nā ʻano hana like ʻole, me ka conductivity uila. Hoʻohana nui ʻia ke keleawe i nā ʻoihana uila a me nā mea uila, a he mau mea nui nā pepa keleawe no ka hana ʻana i nā papa kaapuni paʻi (PCB). Ma waena o nā ʻano pepa keleawe like ʻole i hoʻohana ʻia i ka hana ʻana o nā PCB, ʻo ka pepa keleawe ED ka mea i hoʻohana nui ʻia.
Hana ʻia ka pepa keleawe ED ma o ka electro-deposition (ED), ʻo ia ke kaʻina hana e pili ana i ka waiho ʻana o nā ʻātoma keleawe ma luna o kahi ʻili metala ma o ke au uila. ʻO ka pepa keleawe hopena he maʻemaʻe loa, like, a he mau waiwai mechanical a me electrical maikaʻi loa.
ʻO kekahi o nā pono nui o ka pepa keleawe ED ʻo ia kona ʻano like. Hoʻomaopopo ke kaʻina hana electro-deposition i ka mānoanoa o ka pepa keleawe ma kona ʻili holoʻokoʻa, he mea koʻikoʻi ia i ka hana ʻana i ka PCB. Hoʻākāka pinepine ʻia ka mānoanoa o ka pepa keleawe ma nā microns, a hiki ke piʻi mai kekahi mau microns a i kekahi mau ʻumi microns, ma muli o ka noi. ʻO ka mānoanoa o ka pepa keleawe e hoʻoholo ai i kona conductivity uila, a ʻo ka pepa mānoanoa he kiʻekiʻe ka conductivity.
Ma waho aʻe o kona ʻano like, loaʻa i ka pepa keleawe ED nā waiwai mechanical maikaʻi loa. He palupalu loa ia a hiki ke pelu maʻalahi, hoʻohālikelike ʻia, a hana ʻia e kūpono i nā contours o ka PCB. ʻO kēia palupalu e lilo ia i mea kūpono no ka hana ʻana i nā PCB me nā geometries paʻakikī a me nā hoʻolālā paʻakikī. Eia kekahi, ʻo ke ductility kiʻekiʻe o ka pepa keleawe e hiki ai iā ia ke kū i ke kulou pinepine ʻana a me ka flexing me ka ʻole o ka haki a haki paha.
ʻO kekahi waiwai koʻikoʻi o ka pepa keleawe ED ʻo ia kona conductivity uila. ʻO ke keleawe kekahi o nā metala conductive loa, a ʻo ka conductivity o ka pepa keleawe ED ma mua o 5 × 10 ^ 7 S / m. He mea nui kēia pae kiʻekiʻe o ka conductivity i ka hana ʻana o nā PCB, kahi e hiki ai ke hoʻoili i nā hōʻailona uila ma waena o nā ʻāpana. Eia kekahi, ʻo ke kū'ē uila haʻahaʻa o ka pepa keleawe e hōʻemi ana i ka nalowale o ka ikaika hōʻailona, he mea koʻikoʻi ia i nā noi wikiwiki a me ke alapine kiʻekiʻe.
He kūpaʻa loa hoʻi ka pepa keleawe ED i ka oxidation a me ka corrosion. Hoʻopili ke keleawe me ka oxygen i ka lewa e hana i kahi papa lahilahi o ka oxide keleawe ma luna o kona ʻili, hiki ke hoʻopilikia i kona conductivity uila. Eia nō naʻe, ua uhi pinepine ʻia ka pepa keleawe ED me kahi papa o ka mea pale, e like me ka tin a i ʻole ka nickel, e pale aku i ka oxidation a hoʻomaikaʻi i kona solderability.
I ka hopena, he mea hana maʻalahi a koʻikoʻi ka pepa keleawe ED i ka hana ʻana o nā PCB. ʻO kona ʻano like, ka maʻalahi, ke alakaʻi uila kiʻekiʻe, a me ke kūʻē ʻana i ka oxidation a me ka corrosion e lilo ia i mea kūpono no ka hana ʻana i nā PCB me nā geometries paʻakikī a me nā koi hana kiʻekiʻe. Me ka ulu ʻana o ke koi no nā mea uila wikiwiki a me ke alapine kiʻekiʻe, ʻo ke koʻikoʻi o ka pepa keleawe ED e hoʻonui wale ʻia i nā makahiki e hiki mai ana.
Ka manawa hoʻouna: Pepeluali-17-2023