FR4 vs. Polyimide: ʻO wai ka mea kūpono no nā kaapuni maʻalahi?

Ma kēia blog, e ʻimi mākou i nā ʻokoʻa ma waena o FR4 a me nā mea polyimide a me kā lākou hopena i ka hoʻolālā kaapuni flex a me ka hana.

ʻO nā kaapuni maʻalahi, ʻike ʻia hoʻi ʻo nā kaʻa paʻi paʻi maʻalahi (FPC), ua lilo i mea nui o nā uila uila hou ma muli o ko lākou hiki ke kūlou a wili. Hoʻohana nui ʻia kēia mau kaapuni i nā noi e like me nā smartphones, nā mea hiki ke hoʻohana ʻia, nā uila uila, a me nā mea lapaʻau. ʻO nā mea i hoʻohana ʻia i ka hana kaapuni maʻalahi ke pāʻani i ko lākou hana a me ka hana. ʻElua mau mea maʻamau i hoʻohana ʻia i nā kaapuni maʻalahi ʻo FR4 a me polyimide.

Kū ʻo FR4 no Flame Retardant 4 a he laminate epoxy i hoʻoikaika ʻia i ka fiberglass. Hoʻohana nui ʻia ia ma ke ʻano he kumu kumu no nā papa kaapuni paʻi paʻi (PCB).Eia nō naʻe, hiki ke hoʻohana ʻia ʻo FR4 i nā kaapuni maʻalahi, ʻoiai me nā palena. ʻO nā pōmaikaʻi nui o FR4 ʻo kona ikaika mechanical kiʻekiʻe a paʻa, kūpono ia no nā noi kahi mea koʻikoʻi. He mea maʻalahi hoʻi ia i ka hoʻohālikelike ʻia me nā mea ʻē aʻe i hoʻohana ʻia i nā kaapuni maʻalahi. Loaʻa iā FR4 nā waiwai insulation uila maikaʻi a me ke kūpaʻa wela kiʻekiʻe. Eia naʻe, ma muli o kona paʻakikī, ʻaʻole ia e like me nā mea ʻē aʻe e like me ka polyimide.

ʻO Polyimide, ma ka ʻaoʻao ʻē aʻe, he polymer hana kiʻekiʻe e hāʻawi i ka maʻalahi. He mea thermoset hiki ke kū i nā wela kiʻekiʻe a kūpono i nā noi e koi ana i ka pale wela.Ua koho pinepine ʻia ʻo Polyimide no ka hoʻohana ʻana i nā kaʻa kaʻa maʻalahi ma muli o kona ʻano maʻalahi a paʻa. Hiki ke pelu, wili a pelu me ka pili ole i ka hana o ke kaapuni. Loaʻa i ka Polyimide nā waiwai insulation uila maikaʻi a me kahi mau dielectric haʻahaʻa, kahi mea e pono ai no nā noi kiʻekiʻe. Eia naʻe, ʻoi aku ka maikaʻi o ka polyimide ma mua o FR4 a ʻoi aku ka haʻahaʻa o kona ikaika mechanical i ka hoʻohālikelike ʻana.

Loaʻa iā FR4 a me polyimide ko lākou pono ponoʻī a me nā palena i ka wā e pili ana i nā kaʻina hana.Hana ʻia ʻo FR4 me ka hoʻohana ʻana i kahi kaʻina subtractive kahi i kālai ʻia ke keleawe keu aku e hana i ke ʻano kaapuni i makemake ʻia. He oʻo kēia kaʻina hana a hoʻohana nui ʻia i ka ʻoihana PCB. ʻO ka Polyimide, ma ka ʻaoʻao ʻē aʻe, hana maʻamau ʻia me ka hoʻohana ʻana i kahi kaʻina hana hoʻohui, e pili ana i ka waiho ʻana i nā ʻāpana lahilahi o ke keleawe ma luna o kahi substrate e kūkulu i nā ʻano kaapuni. Hiki i ke kaʻina hana ke ʻoi aku ka maikaʻi o nā kaʻina alakaʻi a me ka ʻoi aku ka paʻa o ke kaʻa, kūpono ia no nā kaʻa kaʻa kaʻa kiʻekiʻe.

Ma keʻano o ka hana,ʻo ka koho ma waena o FR4 a me polyimide e pili ana i nā koi kūikawā o ka noi.He kūpono ʻo FR4 no nā noi kahi koʻikoʻi ka rigidity a me ka ikaika mechanical, e like me ka uila uila. Loaʻa iā ia ke kūpaʻa wela maikaʻi a hiki ke kū i nā kaiapuni wela kiʻekiʻe. Eia nō naʻe, ʻaʻole kūpono kona ʻano liʻiliʻi no nā noi e pono ai ke kulou a i ʻole ka pelu ʻana, e like me nā mea hiki ke hoʻohana. ʻO Polyimide, ma ka ʻaoʻao ʻē aʻe, ʻoi aku ka maikaʻi i nā noi e koi ai i ka maʻalahi a me ka lōʻihi. ʻO kona hiki ke pale i ka piʻi pinepine ʻana he mea kūpono ia no nā noi e pili ana i ka neʻe ʻana a i ʻole ka haʻalulu, e like me nā mea lapaʻau a me nā mea uila aerospace.

Ma ka hōʻuluʻulu, ʻo ke koho ʻana o FR4 a me nā mea polyimide i nā kaapuni maʻalahi e pili ana i nā koi kikoʻī o ka noi.Loaʻa iā FR4 ka ikaika mechanical a me ka paʻa, akā ʻaʻole hiki ke maʻalahi. ʻO Polyimide, ma ka ʻaoʻao ʻē aʻe, hāʻawi i ka maʻalahi a me ka lōʻihi akā hiki ke ʻoi aku ke kumukūʻai. He mea koʻikoʻi ka hoʻomaopopo ʻana i ka ʻokoʻa ma waena o kēia mau mea i ka hoʻolālā ʻana a me ka hana ʻana i nā kaapuni maʻalahi e kūpono i ka hana a me ka hana pono. Inā he kelepona, hiki ke hoʻohana a lāʻau lapaʻau paha, ʻo ke koho ʻana i nā mea pono he mea koʻikoʻi ia i ka holomua o nā kaapuni maʻalahi.