Ke hoʻolauna nei i kā mākou papa kiʻekiʻe kiʻekiʻe FR4 4-layer rigid-flex circuit board, i hoʻolālā kūikawā ʻia no nā noi pulse CO-oximeter.ʻO kā mākou mau hiʻohiʻona he mea hoʻoponopono lāʻau lapaʻau hou e koi ai i ka hui pū ʻana o ka maʻalahi a me ka rigidity i kahi hoʻolālā paʻa.

ʻO ka hana 4-layer o kā mākou PCB rigid-flex e hāʻawi i ke kaulike kūpono o ka maʻalahi a me ka ikaika, i mea kūpono no nā mea lapaʻau pono e kū i ka neʻe mau a me ke kulou ʻana.Hoʻohana kā mākou papa kaapuni i nā mea kumu e like me PI a me FR4 e hōʻoia i ka lōʻihi a me ka hilinaʻi i ke koi ʻana i nā noi lāʻau.

ʻO kā mākou papa paʻa paʻa i loko o ka mānoanoa keleawe o 18um a me ka mānoanoa keleawe o waho o 35um, nona ka conductivity maikaʻi a me ka hiki ke hoʻouna i nā hōʻailona.ʻAʻole hoʻomaikaʻi wale ke ʻano o ka papa i ka uhi melemele, ka uhi ʻulaʻula polū, a me ka pale keʻokeʻo akā hāʻawi pū kekahi i ka ʻike maka no ka hoʻokomo ʻana i nā mea a me ke kūʻai ʻana.

Hōʻike ʻia kā mākou papa paʻa paʻa i kahi hoʻomaʻamaʻa i ka nickel immersion gold (ENIG) i mea e hōʻoia ai i ka pale ʻana i ka corrosion maikaʻi loa a me ka solderability.ʻO ka ʻāpana maʻalahi o ka PCB ʻo 0.19 mm mānoanoa (+/- 0.03 mm), ʻoiai ʻo ka ʻāpana paʻa he 1.0 mm mānoanoa (+/- 10%), e loaʻa ana i ke kaulike kūpono o ka maʻalahi a me ka paʻa.ʻO ka stiffener ʻano o kā mākou paneli ʻo PI, e hāʻawi i ke kākoʻo hou a me ka pale i nā mea maʻalahi.