Hoʻopaʻa uea- ke ʻano o ka kau ʻana i kahi pahu ma luna o kahi PCB

Aia he 500 a 1,200 mau ʻāpana i pili i kēlā me kēia wafer ma mua o ka pau ʻana o ke kaʻina hana. No ka hoʻohana ʻana i kēia mau ʻāpana ma kahi e pono ai, pono e ʻoki ʻia ka wafer i nā ʻāpana pākahi a laila hoʻopili ʻia i waho a hoʻāla ʻia. I kēia manawa, ua kapa ʻia ke ʻano o ka hoʻopili ʻana i nā uea (nā ala hoʻouna no nā hōʻailona uila).

Mea o ka wirebonding: gula / alumini / keleawe

Hoʻoholo ʻia nā mea o ka wirebonding e ka noʻonoʻo ʻana i nā ʻano hoʻohālikelike like ʻole a hoʻohui iā lākou i ke ʻano kūpono loa. ʻO nā ʻāpana i ʻōlelo ʻia ma ʻaneʻi e pili ana i nā mea he nui, ʻo ia hoʻi ke ʻano huahana semiconductor, ʻano pahu, ka nui o ka pā, ke anawaena alakaʻi metala, ke ʻano welding, a me nā hōʻailona hilinaʻi e like me ka ikaika tensile a me ka elongation o ke alakaʻi metala. He gula, aluminika a me ke keleawe ma'amau. I waena o lākou, hoʻohana nui ʻia ke kelepona gula no ka hoʻopili semiconductor.

ʻO ke kaula gula maikaʻi ka conductivity uila, paʻa kemika, a he kūpaʻa ikaika ka corrosion. Eia naʻe, ʻo ka pōʻino nui loa o ka uea alumini, ka mea i hoʻohana nui ʻia i nā lā mua, ʻo ia ka maʻalahi o ka corrode. Eia kekahi, he ikaika ka paakiki o ka uwea gula, no laila hiki ke hana pono ia i poepoe ma ka hookui kumu, a hiki ke hana pono i ka puka puka kepau semicircular (Loop, mai ka paa mua a hiki i ka paa lua) ma ka paa lua. ke ʻano i hana ʻia).

ʻOi aku ka nui o ke anawaena a me ka pitch ʻoi aku ka nui o ka uea alumini ma mua o ka uea gula. No laila, inā hoʻohana ʻia ka uea gula maʻemaʻe kiʻekiʻe e hana i ka puka alakaʻi, ʻaʻole ia e haki, akā e haki maʻalahi ka uea alumini maʻemaʻe, no laila e hui pū ʻia me kekahi silikoni a i ʻole ka magnesium e hana i kahi huila. Hoʻohana nui ʻia ka uea alumini i loko o ka pahu wela wela (e like me Hermetic) a i ʻole nā ​​ala kani ultrasonic kahi hiki ʻole ke hoʻohana ʻia ke kelepona gula.

ʻOiai he maʻalahi ka uea keleawe, ua kiʻekiʻe loa kona paʻakikī. Inā kiʻekiʻe loa ka paʻakikī, ʻaʻole maʻalahi ka hana ʻana i ke ʻano pōlele, a he nui nā palena i ka hana ʻana i nā puka lou. Eia kekahi, pono e hoʻopili ʻia ke kaomi i ka pā chip i ka wā o ke kaʻina hana hoʻopaʻa kinipōpō. Inā kiʻekiʻe ka paʻakikī, e ʻike ʻia nā māwae i ke kiʻiʻoniʻoni ma lalo o ka pā. Eia kekahi, e loaʻa kahi hanana "peeling" kahi e peʻe ai ka papa pad pili paʻa. Eia nō naʻe, no ka mea, ua hana ʻia ka uea metala o ka chip i ke keleawe, aia ka piʻi ʻana o ka hoʻohana ʻana i ke kelepona keleawe i kēia mau lā. ʻOiaʻiʻo, i mea e lanakila ai i nā hemahema o ka uea keleawe, ua hui pū ʻia me kahi liʻiliʻi o nā mea ʻē aʻe e hana ai i kahi huila a laila hoʻohana ʻia.