PCB ??? ???? ????????

[SevenZero]

1. PP (paper phenolic) board vala samanya vidihata hadana eka. Lankave available ara kahapata board eka thamai oya PP kiyanne. Oke lines permanant marker pen eken draw karala, it passe ferric chloride vala dala, marker pen eken andichcha nethi hariya diya vela giyata passe, drill karala hadaganna kramaya thamai prathamika kramaya.

2. Oya PP board ekema, laser printer ekakin board eke design eka negative vidihata print out ekak aran, copper board eka hondata surgical spirit valin pirisindu kara, laser print eka eka udin hariyatama thiyala, electric iron ekakin pressure karala iron karahama ara toner tika expose venava PCB ekata. Ita passe eka ferric chloride vala dala, copper tika diyakaragena, drill karala pavichchiyata ganna puluvan.

3. FR4 kiyana high quality board eka hari, PP board eka hari, CNC PCB machine ekakin engrave karala PCB ekak hadaganna puluvan. Godak sihin lines meken ganna puluvan athara, eka board ekak hadanna tharamak vela yanava. Me kramaya prototyping (ekiyanne eka board ekak dekak hadaganna eka) valata hondai. Mass production (godak hadana kramaya) valata sudusu nehe

4. Presensitized boards valata kelinma oyage PCB layout eka transparent sheet ekak print karala eka udin thiyala, UV light ekak yatin thiyala (UV exposure) ita passe Ferric chloride vala dala board eka hadaganna puluvan.

5. Dry Film Photoresist Sheets aragena, eva PCB board eka udata thiyala, eka udin PCB layout eke print ekak thiyala, UV expose karala, ita passe Ferric chloride use karala etch karaganna puluvan.

6. FR4 production quality PCB manufacturing. Me kramayata vitharai dual layer or multilayer PCB hadanna puluvan. Me kramaya loku chemical process ekak. Isselama hema layer ekatama stencils hadanna ona registration marks ekka. Ita passe, screen printing kramayata hema layer ekakma PCB boards valata layout print karaganna ona. Ita passe drill karanava. Through hole join venna ona then valata plating chemical eka gala, ita passe eka chemical ekaka bassanava through hole plat venna. Ita passe Ferric chloride hari ammonium sulfate vala dala etch karagannava. Ita passe, UV sensitive pain eka gala (green colour eka ena eka) solder mask eka UV expose karanava. Ita passe lead bath ekak athulen yavanaava solder mask thiyena then vala lead gevena vidihata. Eken eliyata enakota hot air knifing kiyana process eken vedipura thiyena lead ain venava. Anthimata thiyenne top and bottom layers valata component marks (silk screen) eka gahana eka. Ekath screen printing vidihata thamai karanne. Sehena diga process ekakin passe thamai ogollo oyadakina lassana PCB eka eliyata enne.