Hana ʻia ʻo HDI PCB --- ʻO ka hoʻomaʻamaʻa ʻana i ka ʻili gula
E pili ana ʻo ENIG i ka Electroless Nickel / Immersion Gold, i kapa ʻia ʻo Ni/Au, ua kaulana kona hoʻohana ʻana i kēia manawa ma muli o ke kuleana no nā lula alakaʻi ʻole a me kona kūpono no ka hoʻolālā PCB o kēia manawa o HDI a me nā pitch maikaʻi ma waena o BGA a me SMT. .
ʻO ka ENIG kahi hana kemika e hoʻopaʻa ana i ke keleawe i ʻike ʻia me ka Nickel a me ke gula, no laila he ʻāpana pālua o ka uhi metala, 0.05-0.125 µm (2-5μ iniha) o ke gula immersion (Au) ma luna o 3-6 µm (120-). 240μ inches) o electroless Nickel (Ni) e like me ka mea i hoʻolako 'ia ma ka normative kuhikuhi.I ka wā o ke kaʻina hana, waiho ʻia ʻo Nickel ma luna o nā ʻili keleawe palladium-catalyzed, a ukali ʻia e ke gula e pili ana i ka ʻāpana nickel-plated e ka hoʻololi molekala.Mālama ka nickel coating i ke keleawe mai ka oxidation a hana ma ke ʻano he ʻili no ka hui PCB, kahi pale e pale aku ai i ke keleawe a me ke gula mai ka neʻe ʻana i kekahi i kekahi, a ʻo ka ʻāpana Au lahilahi e hoʻomalu i ka papa nickel a hiki i ke kaʻina soldering a hāʻawi haʻahaʻa. hoʻopili kūʻē a me ka pulu maikaʻi.Paʻa mau kēia mānoanoa a puni ka papa uea i paʻi ʻia.Hoʻonui nui ka hui ʻana i ke kū'ē i ka corrosion a hāʻawi i kahi ʻili kūpono no ka hoʻokomo ʻana o SMT.
Aia i loko o ke kaʻina hana nā ʻanuʻu:
1) Hoʻomaʻemaʻe.
2) Micro-etching.
3) Ma mua o ka luʻu ʻana.
4) Ke noi nei i ka mea hana.
5) Ma hope o ka luʻu ʻana.
6) Ke noi nei i ka nickel electroless.
7) Ke noi ʻana i ke gula kaiapuni.
Hoʻohana pinepine ʻia ke gula immersion ma hope o ka hoʻohana ʻana i ka solder mask, akā i kekahi mau hihia, ua hoʻohana ʻia ma mua o ke kaʻina hana solder mask.ʻOiaʻiʻo, ʻoi aku ka kiʻekiʻe o ke kumukūʻai inā uhi ʻia ke keleawe āpau me ke gula a ʻaʻole wale ka mea i ʻike ʻia ma hope o ka solder mask.
ʻO ke kiʻikuhi ma luna e hōʻike ana i ka ʻokoʻa ma waena o ENIG a me nā hoʻopau ʻili gula ʻē aʻe.
ʻO ka ʻenehana, ʻo ENIG ka hopena alakaʻi kūpono ʻole no nā PCB mai kona hoʻonohonoho ʻana i ka planarity a me ka homogeneity, ʻoi aku hoʻi no HDI PCB me VFP, SMD a me BGA.Manaʻo ʻia ʻo ENIG i nā kūlana kahi e koi ʻia ai ka hoʻomanawanui paʻa no nā mea PCB e like me nā lua plated a me ka ʻenehana paʻi-fit.He kūpono hoʻi ʻo ENIG no ka hoʻopaʻa ʻana i ka uea (Al).Manaʻo ikaika ʻia ʻo ENIG no nā papa e pono ai e pili ana i nā ʻano mea kūʻai aku no ka mea ua kūpono ia me nā ʻano hui like ʻole e like me SMT, nā ʻāpana kīpē, ke kūʻai ʻana ma o ka Hole, ka hoʻopaʻa ʻana i ka uea, a me ka ʻenehana press-fit.Kū ka ʻili uila ʻole Ni/Au me nā pōʻai wela he nui a me ka lawelawe ʻana i ka tarnish.
ʻOi aku ke kumukūʻai o ENIG ma mua o HASL, OSP, Immersion Silver a me Immersion Tin.Hana ʻia ka papa ʻeleʻele a i ʻole ka pā phosphorus ʻeleʻele i kekahi manawa i ka wā o ke kaʻina hana kahi i hoʻokumu ʻia ai ka phosphorous ma waena o nā papa e hoʻopōʻino ai i nā pilina a me nā wahi haʻihaʻi.ʻO kekahi ʻaoʻao ʻē aʻe e kū mai ana he mau waiwai magnetic makemake ʻole.
Pono:
- Papa Paʻa - Maikaʻi no ka Hui o ka pitch maikaʻi (BGA, QFP…)
- Loaʻa ka solderability maikaʻi loa
- Noho lōʻihi (e pili ana i 12 mahina)
- Kūleʻa pili maikaʻi
- Maikaʻi no nā PCB keleawe mānoanoa
- ʻOi aku ka maikaʻi no ka PTH
- Maikaʻi no nā ʻāpana flip
- Kūpono no Press-fit
- Uea Hoʻopaʻa (Ke hoʻohana ʻia ke Uea Aluminum)
- ʻOi aku ka maikaʻi o ka uila
- Hoʻopau wela maikaʻi
Cons:
- Pipiʻi
- Papa phosphorus ʻeleʻele
- Hoʻopilikia Electromagnetic, Hoʻohaʻahaʻa Hōʻailona Nui ma ke alapine kiʻekiʻe
- ʻAʻole hiki ke hana hou
- ʻAʻole kūpono no nā pā paʻi pili
Hoʻohana maʻamau:
- Nā ʻāpana ʻili paʻakikī e like me Ball Grid Arrays (BGAs), Quad Flat Packages (QFPs).
- ʻO nā PCB me nā ʻenehana Hui Pū ʻIa, kaomi-fit, PTH, hoʻopaʻa uea.
- Nā PCB me ka hoʻopaʻa uea.
- ʻO nā noi hilinaʻi kiʻekiʻe, no ka laʻana nā PCB i nā ʻoihana kahi mea koʻikoʻi ka pololei a me ka lōʻihi, e like me ka aerospace, pūʻali koa, lāʻau lapaʻau a me nā mea kūʻai kiʻekiʻe.
Ma ke ʻano he alakaʻi PCB a me ka hāʻawi ʻana i nā hoʻonā PCBA me ka ʻoi aku o 15 mau makahiki ʻike, hiki iā PCB ShinTech ke hāʻawi i nā ʻano hana papa PCB āpau me ka pau ʻana o ka ʻili.Hiki iā mākou ke hana pū me ʻoe e hoʻomohala i ka ENIG, HASL, OSP a me nā papa kaapuni ʻē aʻe i hana ʻia i kāu mau koi kikoʻī.Hōʻike mākou i nā PCB kūʻai kūʻai hoʻokūkū o ke kumu metala / alumini a me ka ʻoʻoleʻa, ʻoluʻolu, paʻakikī, a me nā mea maʻamau FR-4, TG kiʻekiʻe a i ʻole nā mea ʻē aʻe.
Ke kuai Blogs
Ka manawa hoʻouna: Jan-28-2023
