ʻO ke kuleana o ka ʻeleʻele: passivation o ka ʻili keleawe; e hoʻonui i ka ʻili o ka ʻili o loko o ka pahu keleawe, a laila e hoʻonui ai i ka ikaika paʻa ma waena o ka resin epoxy. Papa PCB a me ka papa o loko o ke keleawe keleawe;

Ka ikaika o ka ʻili

ʻO ke ala ʻeleʻele no ka mālama ʻana i ka papa o loko o ka PCB multilayer board:

PCB multilayer papa ʻeleʻele oxidation lapaʻau

ʻO ke ʻano o ka ʻoki ʻana ʻana o ka PCB multilayer board

ʻO ke ʻano hana ʻeleʻele ʻeleʻele ʻo PCB multilayer board

Hoʻohana ka PCB multilayer papa i ke ʻano ʻeleʻele kiʻekiʻe, ʻo ka papa o loko e hoʻopuka i ke koʻikoʻi wela (thermal stress), hiki ke hoʻokaʻawale i ka papa ma hope o ka lamination a i ʻole ka māwae o ka pahu keleawe i loko;

1. ʻO ka ʻoki ʻia ʻana o Brown:

ʻO ka huahana o ka hoʻomaʻamaʻa ʻeleʻele ʻeleʻele o nā papa multi-layer o nā mea hana PCB ka nui o ka copper oxide, ʻaʻohe mea i kapa ʻia he cuprous oxide. ʻO kēia kekahi mau manaʻo kuhihewa i ka ʻoihana. Ma hope o ka ESCA (electro specific chemical analysis), hiki ke hoʻoholo i ka ʻokoʻa ma waena o nā ʻātoma keleawe a me nā atom oxygen. ʻO ka ikehu hoʻopaʻa, ka lakio ma waena o nā ʻātoma keleawe a me nā ʻātoma oxygen ma ka ʻili o ka oxide; ʻO kaʻikepili maʻemaʻe a me ka nānāʻana i ka nānāʻana e hōʻoia i ka huahana o kaʻeleʻele he keleawe oxide, aʻaʻohe mea’ē aʻe;

ʻO ka hui maʻamau o ka wai ʻeleʻele:

ʻO ka sodium chlorite

PH hoʻopaʻa i ka trisodium phosphate

ʻO ka sodium hydroxide

Kahaleleu

A i ʻole ka hoʻonā kalapona kalapona ammonia kumu (25% wai amonia)

2. ʻIke pili

1. Peel ikaika (peel ikaika) 1oz copper foil ma ka māmā holo o 2mm/min, ka laula o ka copper foil he 1/8 iniha, a o ka tensile ikaika e oi aku mamua o 5 paona / iniha.

2. ʻO ke kaumaha o ka oxide (paona oxide); Hiki ke ana ʻia me ke ʻano gravimetric, kaohi ʻia ma 0.2—0.5mg/cm2

3. ʻO nā mea nui e pili ana i ka ikaika o ka waimaka ma o ka loiloi hoʻololi kūpono (ANDVA: the analysis of variable) ʻo ia:

① ʻO ka ʻike o ka sodium hydroxide

②Ka paʻa o ka sodium chlorite

③ʻO ka pilina ma waena o ka trisodium phosphate a me ka manawa immersion

④Ka pilina ma waena o ka sodium chlorite a me ka trisodium phosphate

ʻO ka ikaika o ka waimaka e pili ana i ka hoʻopiha ʻana o ka resin i ka hoʻolālā kristal oxide, no laila pili pū kekahi i nā ʻāpana kūpono o ka lamination a me nā waiwai kūpono o ka resin pp.

ʻO ka lōʻihi o nā kristal acicular o ka oxide he 0.05mil (1-1.5um) ka mea maikaʻi loa, a ʻoi aku ka nui o ka ikaika o ka waimaka i kēia manawa;