He alakaʻi no FR-4 no nā Kaapuni Paʻi

ʻO nā waiwai a me nā hiʻohiʻona o FR-4 a i ʻole FR4 he mea maʻalahi loa ia ma ke kumukūʻai kūpono. ʻO ia ke kumu i laha loa ai kona hoʻohana ʻana i ka hana kaapuni paʻi. No laila, he mea maʻamau ka hoʻokomo ʻana i kahi ʻatikala e pili ana iā ia ma kā mākou blog.

Ma keia 'atikala, 'oe e 'ike hou aku e pili ana i:

Nā waiwai a me nā pono o FR4
ʻO nā ʻano like ʻole o FR-4
ʻO nā kumu e noʻonoʻo ai i ke koho ʻana i ka mānoanoa
No ke aha e koho ai iā FR4?
Loaʻa nā ʻano FR4 mai Proto-Electronics

FR4 waiwai a me nā mea waiwai

ʻO FR4 kahi maʻamau i wehewehe ʻia e ka NEMA (National Electrical Manufacturers Association) no kahi laminate epoxy resin i hoʻoikaika ʻia i ke aniani.

Kū ʻo FR no "flame retardant" a hōʻike i ka mea i hoʻokō ʻia me ka maʻamau UL94V-0 ma luna o ka inflammability mea palaka. Hiki ke loaʻa ka code 94V-0 ma nā PCB FR-4 āpau. Hōʻoiaʻiʻo ia i ka hoʻolaha ʻole ʻana o ke ahi a me ka hoʻopau wikiwiki ʻana i ka wā e ʻā ai ka mea.

ʻO kāna hoʻololi aniani (TG) no ke kauoha o 115 ° C a 200 ° C no nā High TGs a i ʻole HiTG ma muli o nā ʻano hana hana a me nā resins i hoʻohana ʻia. E loaʻa i kahi FR-4 PCB kahi papa o FR-4 i hoʻopaʻa ʻia ma waena o ʻelua mau ʻāpana lahilahi o ke keleawe laminated.

Hoʻohana ʻo FR-4 i ka bromine, kahi mea i kapa ʻia he mea kemika halogen i pale i ke ahi. Ua hoʻololi ʻo ia iā G-10, kahi hui ʻē aʻe i emi ʻole ke kūpaʻa, ma ka hapa nui o kāna mau noi.

Loaʻa iā FR4 ka maikaʻi o ka loaʻa ʻana o ka ratio kūʻē-kaumaha maikaʻi. ʻAʻole ia e komo i ka wai, mālama i ka ikaika mechanical kiʻekiʻe a loaʻa ka mana insulating maikaʻi i nā wahi maloʻo a maloʻo paha.

Nā laʻana o FR-4

FR4 maʻamau: e like me ka hōʻike ʻana o kona inoa, ʻo ia ka FR-4 maʻamau me ke kūpaʻa wela o ke kauoha o 140 ° C a 150 ° C.

TG FR4 kiʻekiʻe: ʻO kēia ʻano FR-4 he kiʻekiʻe ke aniani hoʻololi (TG) ma kahi o 180°C.

Kiʻekiʻe CTI FR4: Hōʻike Hōʻike Hoʻohālikelike ʻoi aku ma mua o 600 Volts.

FR4 me ke keleawe laminated ʻole: kūpono no nā papa insulation a me nā kākoʻo papa.

Aia nā kikoʻī hou aku o nā ʻano o kēia mau mea like ʻole ma hope o ka ʻatikala.

Nā mea e noʻonoʻo ai i ke koho ʻana i ka mānoanoa

Hoʻohālikelike me nā ʻāpana: ʻoiai ua hoʻohana ʻia ʻo FR-4 e hana i nā ʻano kaapuni paʻi he nui, ʻo kona mānoanoa ka hopena i nā ʻano mea i hoʻohana ʻia. No ka laʻana, ʻokoʻa nā ʻāpana THT mai nā ʻāpana ʻē aʻe a koi i kahi PCB lahilahi.

Mālama wahi: He mea nui ka mālama ʻana i ka lewa i ka wā e hoʻolālā ai i kahi PCB, ʻo ia hoʻi no nā mea hoʻohui USB a me nā lako Bluetooth. Hoʻohana ʻia nā papa ʻoi loa i ka hoʻonohonoho ʻana i mea koʻikoʻi ka mālama wahi.

Hoʻolālā a me ka maʻalahi: makemake ka hapanui o nā mea hana i nā papa mānoanoa i nā papa lahilahi. Ke hoʻohana nei i ka FR-4, inā ʻeleʻele loa ka substrate, e pilikia paha ia e haki inā hoʻonui ʻia ka nui o ka papa. Ma ka ʻaoʻao ʻē aʻe, hiki ke maʻalahi nā papa mānoanoa a hiki ke hana i nā V-grooves.

Pono e noʻonoʻo ʻia ke ʻano o ka PCB e hoʻohana ai. No ka ʻāpana uila uila ma ke kahua lapaʻau, hōʻoia nā PCB lahilahi i ke kaumaha. ʻO nā papa liʻiliʻi loa - a no laila hiki ke maʻalahi - ʻoi aku ka maʻalahi o ka wela. Hiki iā lākou ke kūlou a lawe i kahi kihi makemake ʻole i ka wā o nā ʻanuʻu ʻāpana.

Ka hoʻomalu impedance: ʻO ka mānoanoa o ka papa e hōʻike ana i ka mānoanoa o ke kaiapuni dielectric, i kēia hihia FR-4, ʻo ia ka mea e hoʻomaʻamaʻa i ka mana impedance. Inā he mea koʻikoʻi ka impedance, ʻo ka mānoanoa o ka papa he mea hoʻoholo e noʻonoʻo ʻia.

Hoʻohui: ʻo ke ʻano o nā mea hoʻohui i hoʻohana ʻia no kahi kaapuni paʻi e hoʻoholo pū i ka mānoanoa FR-4.

No ke aha e koho ai iā FR4?

ʻO ke kumukūʻai kūpono o FR4s e hoʻolilo iā lākou i koho maʻamau no ka hana ʻana i nā pūʻulu liʻiliʻi o nā PCB a i ʻole no ka prototyping uila.

Eia naʻe, ʻaʻole kūpono ʻo FR4 no nā kaapuni paʻi kiʻekiʻe. Pēlā nō, inā makemake ʻoe e kūkulu i kāu PCB i nā huahana ʻaʻole hiki ke ʻae i ka lawe ʻana i nā ʻāpana a kūpono ʻole i nā PCB maʻalahi, pono ʻoe e makemake i kekahi mea: polyimide/polyamide.

Loaʻa nā ʻano like ʻole o FR-4 mai Proto-Electronics

FR4 maʻamau

FR4 SHENGYI ʻohana S1000H
ʻO ka mānoanoa mai 0.2 a 3.2 mm.
ʻOhana FR4 VENTEC VT 481
ʻO ka mānoanoa mai 0.2 a 3.2 mm.
FR4 SHENGYI ʻohana S1000-2
ʻO ka mānoanoa mai 0.6 a 3.2 mm.
ʻOhana FR4 VENTEC VT 47
ʻO ka mānoanoa mai 0.6 a 3.2 mm.
FR4 SHENGYI ʻohana S1600
ʻO ka mānoanoa maʻamau 1.6 mm.
FR4 VENTEC ʻohana VT 42C
ʻO ka mānoanoa maʻamau 1.6 mm.
ʻO kēia mea he aniani epoxy me ke keleawe ʻole, i hoʻolālā ʻia no ka hoʻohana ʻana i nā papa insulation, templates, board supports, etc.
ʻO ka mānoanoa mai 0.3 a 5 mm.