PCB board etching process, yomwe imagwiritsa ntchito njira zachikhalidwe zopangira mankhwala kuti iwononge malo osatetezedwa.Kukhala ngati kukumba ngalande, njira yotheka koma yosagwira ntchito.

Mu ndondomeko ya etching, imagawidwanso mu ndondomeko yabwino ya filimu ndi ndondomeko yolakwika ya filimu.Njira yabwino yopangira filimu imagwiritsa ntchito tini yokhazikika kuti iteteze dera, ndipo filimu yolakwika imagwiritsa ntchito filimu yowuma kapena filimu yonyowa kuti iteteze dera.M'mphepete mwa mizere kapena mapepala ndi olakwika mwachikhalidweetchingnjira.Nthawi iliyonse mzerewu ukuwonjezeka ndi 0.0254mm, m'mphepete mwake mudzapendekeka kumlingo wina.Pofuna kuonetsetsa kuti pali malo okwanira, kusiyana kwa waya kumayesedwa nthawi zonse pafupi ndi waya aliyense wokonzedweratu.

Zimatenga nthawi yochulukirapo kuti muyike ulalo wa mkuwa kuti mupange kusiyana kokulirapo kwa waya.Izi zimatchedwa etch factor, ndipo popanda wopanga kuti apereke mndandanda womveka bwino wa mipata yochepera pa ounce imodzi yamkuwa, phunzirani zomwe wopanga amapanga.Ndikofunika kwambiri kuwerengera mphamvu zochepa pa ounce yamkuwa.Etch factor imakhudzanso dzenje la mphete la wopanga.Kukula kwa dzenje la mphete ndi 0.0762mm kujambula + 0.0762mm kubowola + 0.0762 stacking, kwa okwana 0.2286.Etch, kapena etch factor, ndi imodzi mwamawu anayi omwe amafotokozera kalasi ya ndondomeko.

Pofuna kupewa kusanjikiza koteteza kuti zisagwe ndikukwaniritsa zofunikira za kasamalidwe ka mankhwala, ma etching achikhalidwe amati malo ocheperako pakati pa mawaya sayenera kuchepera 0.127mm.Poganizira chodabwitsa cha dzimbiri mkati ndi undercut pa etching ndondomeko, m'lifupi waya ayenera ziwonjezeke.Mtengo uwu umatsimikiziridwa ndi makulidwe a wosanjikiza womwewo.Kukhuthala kwa mkuwa, kumatengera nthawi yayitali kuti atseke mkuwa pakati pa mawaya ndi pansi pa zokutira zoteteza.Pamwambapa, pali deta ziwiri zomwe ziyenera kuganiziridwa kuti zikhale ndi mankhwala opangira mankhwala: etch factor - chiwerengero cha mkuwa wokhazikika pa ounce;ndi kusiyana kochepa kapena phula m'lifupi pa aulansi yamkuwa.