ʻO ke kaʻina hana etching papa PCB, kahi e hoʻohana ai i nā kaʻina hana kemika kuʻuna e hoʻopau i nā wahi i pale ʻole ʻia. ʻAno like me ka ʻeli ʻana i ka ʻauwaha, kahi ala kūpono akā ʻaʻole pono.

Ma ke kaʻina hana etching, ua mahele pū ʻia i kahi kaʻina hana kiʻiʻoniʻoni maikaʻi a me kahi kaʻina hana kiʻiʻoniʻoni maikaʻi ʻole. Hoʻohana ke kaʻina hana kiʻiʻoniʻoni maikaʻi i kahi pahu paʻa no ka pale ʻana i ke kaapuni, a ʻo ke kaʻina hana kiʻiʻoniʻoni maikaʻi ʻole e hoʻohana i kahi kiʻiʻoniʻoni maloʻo a i ʻole kahi kiʻiʻoniʻoni pulu e pale i ke kaapuni. ʻO nā ʻaoʻao o nā laina a i ʻole nā ​​pads ua kuhi hewa me nā kuʻunakalai anaʻano hana. I kēlā me kēia manawa e hoʻonui ʻia ka laina e 0.0254mm, e hoʻohuli ʻia ka lihi i kekahi ʻano. No ka hōʻoia ʻana i ka hoʻokaʻawale kūpono, e ana mau ʻia ka ʻāpana uea ma kahi kokoke loa o kēlā me kēia uea i hoʻonohonoho mua ʻia.

ʻOi aku ka lōʻihi o ka manawa e hoʻopaʻa ai i ka ʻauneke keleawe i mea e hana ai i kahi ākea nui i loko o ka ʻole o ka uea. Kapa ʻia kēia ʻo ka etch factor, a me ka hāʻawi ʻole ʻana o ka mea hana i kahi papa inoa maopopo o nā āpau liʻiliʻi ma kēlā me kēia auneke keleawe, e aʻo i ka etch factor a ka mea hana. He mea nui ka helu ʻana i ka mana liʻiliʻi o ka ʻauneke keleawe. Hoʻopili pū ka mea etch i ka puka apo o ka mea hana. ʻO ka nui o ka puka apo maʻamau he 0.0762mm kiʻi + 0.0762mm drilling + 0.0762 stacking, no ka huina o 0.2286. ʻO Etch, a i ʻole etch factor, ʻo ia kekahi o nā huaʻōlelo nui ʻehā e kuhikuhi ana i kahi papa hana.

I mea e pale ai i ka hāʻule ʻana o ka papa pale a hoʻokō i ke kaʻina hana spacing koi o ka etching kemika, ʻōlelo ʻia ka etching kuʻuna ʻaʻole e emi ka liʻiliʻi ma waena o nā uea ma mua o 0.127mm. Ke noʻonoʻo nei i ke ʻano o ka corrosion o loko a me ka undercut i ka wā o ke kaʻina hana etching, pono e hoʻonui ʻia ka laulā o ka uea. Hoʻoholo ʻia kēia waiwai e ka mānoanoa o ka papa like. ʻO ka mānoanoa o ka papa keleawe, ʻoi aku ka lōʻihi o ke kālai ʻana i ke keleawe ma waena o nā uea a ma lalo o ka uhi pale. Ma luna aʻe, ʻelua ʻikepili e pono e noʻonoʻo ʻia no ke kalai kemika: ka helu etch - ka helu o ke keleawe i kālai ʻia i kēlā me kēia auneke; a me ke ākea liʻiliʻi a i ʻole ka laula pitch no ka ʻauneke keleawe.