Dzidza izvi, PCB bhodhi plating haina layer!

Munguva yekugadzira mabhodhi ePCB, mamiriro mazhinji asingatarisirwe achaitika, senge electroplated mhangura, kemikari yemhangura yendarira, goridhe plating, tin-lead alloy plating uye imwe plating layer delamination. Saka chii chikonzero che stratification iyi?

Pasi pekuvheneka kwechiedza che ultraviolet, iyo photoinitiator inotora simba rechiedza inoparara muboka rekusununguka rinokonzera photopolymerization reaction uye rinogadzira muviri molecule iyo isinganyunguriki mu dilute alkali solution. Pasi pekuratidzwa, nekuda kwekusakwana kwepolymerization, panguva yekuvandudza, firimu rinoputika uye kunyorova, zvichiita kuti mitsetse isina kujeka uye kunyange firimu inodonha, zvichiita kuti pave nekusawirirana pakati pefirimu nemhangura; Kana kuratidzwa kwakanyanyisa, zvinokonzeresa kunetsa mukusimudzira, uye zvakare inoburitsa warping uye peeling panguva yeplating process, ichigadzira infiltration plating. Saka zvakakosha kudzora kuratidzwa simba; Mushure mokunge pamusoro pemhangura inobatwa, nguva yekuchenesa haisi nyore kuva yakareba, nokuti mvura yekuchenesa inewo huwandu hwezvinhu zvine acidic, kunyange zvazvo zvinyorwa zvayo zvisina simba, asi kukanganisa pamusoro pemhangura haigoni. kutorwa zvishoma, uye basa rekuchenesa rinofanira kuitwa zvakanyatsoenderana nemaitiro ekugadzirisa.

Chikonzero chikuru nei iyo goridhe layer inodonha kubva pamusoro peiyo nickel layer ndiko kurapwa kwepamusoro kwe nickel. Iyo yakashata pamusoro pekuita kwe nickel metal inonetsa kuwana mhedzisiro inogutsa. Iyo yepamusoro nickel coating iri nyore kugadzira passivation firimu mumhepo, senge isina kurongeka kurapwa, ichaparadzanisa goridhe layer kubva pamusoro peiyo nickel layer. Kana iyo activation isingakodzeri mu electroplating, iyo goridhe layer ichabviswa kubva pamusoro peiyo nickel layer uye bvisa. Chikonzero chechipiri ndechekuti mushure mekuita, nguva yekuchenesa yakarebesa, zvichiita kuti iyo passivation firimu igadzirwezve pane nickel pamusoro, uye yozove yakashongedzwa, izvo zvinozoburitsa hurema mukupfeka.

Pane zvikonzero zvakawanda zveplating delamination, kana iwe uchida kuita mamiriro akafanana mukugadzirwa kweplate hazviitike, ine hukama hwakakosha nekutarisira uye basa renyanzvi. Naizvozvo, yakanakisa PCB inogadzira inoitisa yakakwira mwero kudzidziswa kune yega yega mushandi wewekishopu kuitira kudzivirira kuendeswa kwezvinhu zvakaderera.