Manalima Gula
Ma nā lāʻau hoʻomanaʻo kamepiula a me nā kāleka kiʻi, hiki iā mākou ke ʻike i kahi lālani o nā pilina conductive gula, i kapa ʻia ʻo "manamana gula".ʻO ke Gold Finger (a i ʻole Edge Connector) i ka hoʻolālā PCB a me ka ʻoihana hana e hoʻohana i ka mea hoʻohui o ka mea hoʻohui ma ke ʻano he puka no ka papa e hoʻopili ai i ka pūnaewele.A laila, e hoʻomaopopo kākou pehea e hana ai me nā manamana gula ma PCB a me kekahi mau kikoʻī.
ʻO ke ʻano hana o ka manamana lima gula PCB
1. Electroplating nickel gula: mānoanoa a hiki i 3-50u ", no ka mea, o kona conductivity oi aku, oxidation kū'ē a me ka lole pale aku, ka mea, ua nui hoʻohana 'ia i loko o gula manamana PCBs e koi pinepine hoʻokomo a me ka wehe 'ole PCB papa e koi pinepine mechanical friction Ma luna, akā, no ke kumukūʻai kiʻekiʻe o ka pale gula, hoʻohana wale ʻia no ka ʻāpana gula e like me nā manamana gula.
2. Immersion gula: Ka mānoanoa mea maʻamau 1u ", a hiki i 3u" no ka mea o kona conductivity kiʻekiʻe, flatness a me ka solderability, ua hoʻohana nui ia i loko o kiʻekiʻe-precision PCB papa me ke pihi kūlana, paa IC, BGA, etc. Gold manamana PCBs me ka haʻahaʻa lole pale koi hiki no hoi ke koho i ka papa holoʻokoʻa immersion gula kaʻina.ʻOi aku ka haʻahaʻa o ke kumukūʻai o ke kaʻina gula immersion ma mua o ke kaʻina hana electro-gula.He melemele gula ke kala o Immersion Gold.
Ka hana kikoʻī manamana lima gula ma PCB
1) I mea e hoʻonui ai i ka pale ʻana o nā manamana gula, pono e uhi ʻia nā manamana gula me ke gula paʻakikī.
2) Pono e hoʻopili ʻia nā manamana gula, maʻamau 45 °, nā kihi ʻē aʻe e like me 20 °, 30 °, a me nā mea ʻē aʻe inā ʻaʻohe chamfer i ka hoʻolālā, aia kahi pilikia;ua hōʻike ʻia ka chamfer 45 ° i ka PCB ma ke kiʻi ma lalo nei.
3) Pono e mālama ʻia ka manamana gula e like me kahi ʻāpana solder mask e wehe ai i ka puka makani, a ʻaʻole pono ka PIN e wehe i ka mesh kila;
4) Pono ka lō'ihi o ka lō'ihi o 14mil mai ka piko o ka manamana lima a me nā pā immersion kālā;ua ʻōlelo ʻia ʻoi aku ka mamao o ka pad ma mua o 1mm mai ka manamana lima i ka wā o ka hoʻolālā ʻana, me nā pads;
5) Mai hohola i ke keleawe ma ka ʻili o ka manamana gula;
6) Pono e ʻoki ʻia nā ʻāpana āpau o ka ʻāpana o loko o ka manamana gula i ke keleawe, ʻo ka maʻamau ka laulā o ke keleawe ʻoki ʻia he 3mm ka nui;hiki ke hoʻohana ʻia no ke keleawe ʻoki hapalua manamana lima a me ke keleawe ʻoki manamana lima holoʻokoʻa.
He gula anei ka "gula" o na manamana lima gula?
ʻO ka mea mua, e hoʻomaopopo kākou i ʻelua manaʻo: gula palupalu a me ke gula paʻakikī.gula palupalu, gula palupalu maʻamau.ʻO ke gula paʻakikī ka hui pū ʻana o ke gula paʻakikī.
ʻO ka hana nui o ka manamana lima gula e hoʻopili ai, no laila pono e loaʻa iā ia ka conductivity uila maikaʻi, ke kūpaʻa ʻaʻahu, ke kūpaʻa oxidation a me ke kūpaʻa corrosion.
Ma muli o ke ʻano palupalu o ke gula maʻemaʻe (gula), ʻaʻole hoʻohana nā manamana gula i ke gula, akā ʻo kahi ʻāpana o ke gula paʻa (gold compound)" i hoʻopili ʻia ma luna o ia mea, ʻaʻole hiki ke loaʻa ka conductivity maikaʻi o ke gula, akā. hana no hoi ia i ka Abrasion hana a me ka oxidation kū'ē.
No laila ua hoʻohana ka PCB i "gula gula"?ʻO ka pane ʻoiaʻiʻo aia ka hoʻohana, e like me ka ʻili pili o kekahi mau pihi kelepona paʻa, COB (Chip On Board) me ka uea alumini a pēlā aku.ʻO ka hoʻohana ʻana i ke gula palupalu ka mea maʻamau e waiho i ke gula nickel ma ka papa kaapuni ma ka electroplating, a ʻoi aku ka maʻalahi o ka mana mānoanoa.