Huli wikiwiki pcb ili lapaʻau HASL LF RoHS

ʻO ke kaʻina hana HASL papa kaapuni e pili ana i ke kaʻina HASL pad, ʻo ia hoʻi ka uhi ʻana i ka tin ma ka ʻāpana pad ma ka ʻili o ka papa kaapuni. Hiki iā ia ke pāʻani i ka hana o ka anti-corrosion a me ka anti-oxidation, a hiki ke hoʻonui i ka wahi pili ma waena o ka pad a me ka mea i hoʻopaʻa ʻia, a hoʻomaikaʻi i ka hilinaʻi o ka soldering. ʻO ke kaʻina hana kikoʻī e pili ana i nā ʻanuʻu he nui e like me ka hoʻomaʻemaʻe ʻana, ka hoʻoheheʻe kemika o ka tin, ka ʻū ʻana, a me ka holoi ʻana. A laila, ma ke kaʻina hana e like me ka hoʻoheheʻe ʻana i ka ea wela, e hana ia i mea paʻa ma waena o ke kī a me ka mea splice. ʻO ka pulupulu ʻana i ka tin ma nā papa kaapuni kahi hana maʻamau a hoʻohana nui ʻia i ka ʻoihana hana uila.

ʻO ke alakaʻi HASL a me ke alakaʻi ʻole HASL ʻelua mau ʻenehana lapaʻau ʻili i hoʻohana nui ʻia no ka pale ʻana i nā ʻāpana metala o nā papa kaapuni mai ka corrosion a me ka oxidation. Ma waena o lākou, ua haku ʻia ka hui o ke kēpau HASL me 63% tin a me 37% lead, ʻoiai ʻo HASL me ke alakaʻi ʻole i haku ʻia me ka tin, keleawe a me nā mea ʻē aʻe (e like me ke kālā, nickel, antimony, etc.). Ke hoʻohālikelike ʻia me ka HASL me ke alakaʻi, ʻo ka ʻokoʻa ma waena o ka HASL me ke alakaʻi ʻole he ʻoi aku ka maikaʻi o ke kaiapuni, no ka mea, he mea ʻino ke kēpau e hoʻopilikia i ke kaiapuni a me ke olakino kanaka. Eia kekahi, ma muli o nā mea like ʻole i loaʻa i ka HASL me ke alakaʻi ʻole, ʻokoʻa iki kona kūʻai ʻana a me nā waiwai uila, a pono e koho ʻia e like me nā koi noi kikoʻī. ʻO ka ʻōlelo maʻamau, ʻoi aku ka kiʻekiʻe o ke kumukūʻai o ka HASL lead-free ma mua o ko ke alakaʻi HASL, akā ʻoi aku ka maikaʻi o ka mālama ʻana i ke kaiapuni a me ka hoʻokō ʻana, a ua makemake nui ʻia e nā mea hoʻohana hou aʻe.

I mea e hoʻokō ai i ke kuhikuhi RoHS, pono nā huahana papa circuit e hoʻokō i kēia mau kūlana:

1. ʻO ka maʻiʻo o ke kēpau (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr6+), polybrominated biphenyls (PBB) a me polybrominated diphenyl ethers (PBDE) pono e emi iho ma mua o ka waiwai palena.

2. Pono nā mea o nā metala makamae e like me ka bismuth, ke kālā, ke gula, ka palladium, a me ka platinum i loko o nā palena kūpono.

3. Pono ka mea halogen ma lalo o ka waiwai palena i kuhikuhi ʻia, me ka chlorine (Cl), bromine (Br) a me ka iodine (I).

4. Pono ka papa kaapuni a me kona mau ʻāpana e hōʻike i ka ʻike a me ka hoʻohana ʻana i nā mea ʻona a me nā mea ʻino. ʻO ka mea i luna nei kekahi o nā kumu nui no nā papa kaapuni e hoʻokō i ke kuhikuhi RoHS, akā pono e hoʻoholo ʻia nā koi kikoʻī e like me nā lula a me nā kūlana kūloko.