Pehea e koho pono ai i nā mea PCB a me nā ʻāpana uila

ʻO ke koho ʻana i nā mea PCB a me nā ʻāpana uila i aʻo ʻia, no ka mea, pono e noʻonoʻo nā mea kūʻai aku i nā mea hou aʻe, e like me nā hōʻailona hana o nā ʻāpana, nā hana, a me ka maikaʻi a me ka pae o nā ʻāpana.

I kēia lā, e hoʻolauna ʻōnaehana mākou pehea e koho pono ai i nā mea PCB a me nā ʻāpana uila.

PCB mea koho

Hoʻohana ʻia nā FR4 epoxy fiberglass wipes no nā huahana uila, polyimide fiberglass wipes i hoʻohana ʻia no nā mahana ambient kiʻekiʻe a i ʻole nā ​​​​papa kaapuni maʻalahi, a pono nā wipes polytetrafluoroethylene fiberglass no nā kaapuni kiʻekiʻe. No nā huahana uila me nā koi wela wela, pono e hoʻohana ʻia nā substrate metala.

Nā mea pono e noʻonoʻo ʻia i ke koho ʻana i nā mea PCB:

(1) Pono e koho pono ʻia kahi pani me kahi mahana hoʻololi aniani kiʻekiʻe (Tg), a ʻoi aku ke kiʻekiʻe o Tg ma mua o ka wela hana o ke kaapuni.

(2) Pono ka helu haʻahaʻa o ka hoʻonui wela (CTE). Ma muli o ka inconsistent coefficient o thermal hoʻonui i ke kuhikuhi o X, Y a me ka mānoanoa, he mea maʻalahi ke kumu o ka PCB deformation, a me ka mea e hana i ka metallization puka haʻihaʻi a me ka pōʻino mea i loko o koʻikoʻi hihia.

(3) Pono ka pale wela kiʻekiʻe. ʻO ka maʻamau, koi ʻia ka PCB e loaʻa i ka wela wela o 250 ℃ / 50S.

(4) Pono ka palahalaha maikaʻi. ʻO ka pono o ka PCB warpage no SMT he <0.0075mm/mm.

(5) Ma ke ʻano o ka hana uila, pono nā kaʻa alapine kiʻekiʻe i ke koho ʻana i nā mea me ka dielectric kiʻekiʻe a me ka haʻahaʻa dielectric nalowale. ʻO ke kūpaʻa insulation, ka ikaika voltage, ka pale arc e hoʻokō i nā koi o ka huahana.

Ke koho ʻana i nā ʻāpana uila

Ma waho aʻe o ka hoʻokō ʻana i nā koi o ka hana uila, pono ke koho ʻana i nā ʻāpana i nā koi o ka hui ʻana o ka ʻili no nā ʻāpana. Akā, e like me nā kūlana lako laina hana a me ke kaʻina huahana e koho i ke ʻano hoʻopihapiha ʻāpana, ka nui o ka ʻāpana, ke ʻano hoʻopili ʻāpana.

No ka laʻana, i ka wā e pono ai ka hui kiʻekiʻe i ke koho ʻana i nā ʻāpana liʻiliʻi liʻiliʻi: inā ʻaʻole i loaʻa i ka mīkini hoʻopili ʻana i kahi mea hānai braid ākea ākea, ʻaʻole hiki ke koho ʻia ka mea SMD o ka pale wili;