Indima yobumnyama: ukugqithiswa kwendawo yobhedu; phucula uburhabaxa bomgangatho wangaphakathi wefoyile yobhedu, ngokwenjenjalo uphucula amandla okudibanisa phakathi kweresin epoxy. Ibhodi PCB kunye nocweyo lwangaphakathi lwefoyile yobhedu;

Ukomelela kwamandla

Indlela ye-oxidation emnyama yonyango ngokubanzi lwangaphakathi lwebhodi ye-PCB ye-multilayer:

PCB ibhodi multilayer unyango oxidation emnyama

PCB multilayer ibhodi brown oxidation indlela

PCB ibhodi multilayer iqondo eliphantsi blackening indlela

Ibhodi ye-PCB ye-multilayer ithatha ubushushu obuphezulu bendlela yokwenza i-blackening, ibhodi yangaphakathi yebhodi iya kuvelisa uxinzelelo oluphezulu lobushushu (uxinzelelo lwe-thermal), olunokuthi lubangele ukwahlukana kwamaleko emva kwe-lamination okanye i-crack ye-foil yobhedu yangaphakathi;

1. Brown oxidation:

Imveliso yonyango olumnyama lwe-oxidation yeebhodi ezininzi ze-PCB abavelisi ikakhulu yi-copper oxide, akukho nto ibizwa ngokuba yi-cuprous oxide. Le yezinye iimbono eziphosakeleyo kwishishini. Emva kohlalutyo lwe-ESCA (uhlalutyo lwekhemikhali olukhethekileyo lwe-electro), umahluko phakathi kwe-athomu zobhedu kunye ne-athomu ye-oxygen inokumiselwa. Amandla okubopha, umlinganiselo phakathi kweeathom zobhedu kunye neeathom ze-oksijini kumphezulu we-oxide; idatha ecacileyo kunye nohlalutyo lokuqwalasela lubonisa ukuba imveliso ye-blackening yi-copper oxide, kwaye akukho nxalenye enye;

Ukwakheka ngokubanzi kolwelo olumnyama:

I-oxidizing agent ye-sodium chlorite

I-PH buffer trisodium phosphate

Isodiyam hayidroksayidi

Isisenzi

Okanye isisombululo sobhedu se-carbonate ammonia (25% yamanzi ammonia)

2. Idatha efanelekileyo

1. Amandla e-Peel (amandla e-peel) i-1oz i-foil yobhedu ngesantya se-2mm / min, ububanzi be-foil yobhedu yi-1/8 intshi, kwaye amandla okuqina kufuneka abe ngaphezu kwe-5 pounds / intshi.

2. Ubunzima be-oxide (ubunzima be-oxide); inokulinganiswa ngendlela ye-gravimetric, ngokuqhelekileyo ilawulwa kwi-0.2-0.5mg / cm2

3. Izinto ezibalulekileyo ezichaphazela amandla okukrazula ngokuhlalutya okuguquguqukayo okufanelekileyo (ANDVA: uhlalutyo lokuguquguquka) lu:

①Uxinzelelo lwesodium hydroxide

②Uxinzelelo lwe-sodium chlorite

③Intsebenziswano phakathi kwe-trisodium phosphate kunye nexesha lokuntywiliselwa

④Intsebenziswano phakathi kwe-sodium chlorite kunye ne-trisodium phosphate concentration

Amandla okukrazula kuxhomekeke ekuzalisweni kwe-resin kwisakhiwo sekristale ye-oxide, ngoko ke ihambelana neeparitha ezifanelekileyo ze-lamination kunye neempawu ezifanelekileyo ze-resin pp.

Ubude be-crystals ye-acicular ye-oxide yi-0.05mil (1-1.5um) njengeyona nto ibhetele, kwaye amandla okukrazula ngeli xesha nawo akhulu kakhulu;