PCB bhodhi etching process, iyo inoshandisa echinyakare kemikari etching maitiro kukanganisa nzvimbo dzisina kudzivirirwa. Rudzi rwekuchera mugero, nzira inoshanda asi isingashande.

Mune etching process, iyo zvakare yakakamurwa kuita yakanaka firimu maitiro uye yakashata firimu maitiro. Iyo yakanaka firimu nzira inoshandisa tini yakagadziriswa kuchengetedza dunhu, uye iyo yakaipa firimu nzira inoshandisa yakaoma firimu kana firimu rakanyorova kuchengetedza dunhu. Micheto yemitsara kana mapedhi haana kuumbwa nenzira yechinyakareetchingnzira. Nguva dzese mutsara uchiwedzerwa ne 0.0254mm, mupendero unozorerekera kune imwe nhanho. Kuti ive nechokwadi chekupatsanurana kwakaringana, mukaha wewaya unogara uchiyerwa panzvimbo yepedyo yewaya imwe neimwe isati yaiswa.

Zvinotora nguva yakawanda kuti uise huremu hwemhangura kuitira kuti ugadzire gaka rakakura mukushaikwa kwewaya. Izvi zvinodaidzwa kuti etch factor, uye pasina mugadziri anopa runyoro rwakajeka rwemagapu paaundi yemhangura, dzidza etch factor yemugadziri. Zvinonyanya kukosha kuverenga huwandu hushoma pane imwe yemhangura. Iyo etch factor inokanganisawo gomba remhete yemugadziri. Iyo yechinyakare gomba remhete saizi ndeye 0.0762mm imaging + 0.0762mm kuchera + 0.0762 stacking, yehuwandu hwe0.2286. Etch, kana etch factor, nderimwe remashoko mana makuru anotsanangura giredhi rekuita.

Kuti udzivise dura rekudzivirira kubva pakudonha uye kusangana nemaitiro ekuisa nzvimbo zvinodiwa zvemakemikari etching, echinyakare etching inotara kuti diki kupatsanurwa pakati pewaya hakufanirwe kuve pasi pe0.127mm. Tichifunga nezve chiitiko chemukati corrosion uye undercut panguva etching process, hupamhi hwetambo hunofanira kuwedzerwa. Ukoshi uhwu hunotarwa nehupamhi hwemutsetse wakafanana. Iyo yakawanda yemhangura yemhangura, iyo inotora nguva yakareba kuisa mhangura pakati petambo uye pasi pechidziviriro chekudzivirira. Pamusoro, pane dhata mbiri dzinofanirwa kutariswa nekuda kwemakemikari etching: iyo etch factor - nhamba yemhangura yakatemwa paaundi; uye mukaha udiki kana hupamhi hwenamo paaundi yemhangura.