Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list  

Subject: RE: [Homebrew_PCBs] help request: disappointing etch resist development

From: mattmoose1969@...
Date: 2014-09-01

Hi Bertho,

Thanks for your suggestion, that makes total sense. I'll give it a go next.

Regards
Matt

>>>>>>>>>>>>>>>>>>>>>>>

---In Homebrew_PCBs@yahoogroups.com, <boman33@...> wrote :

At the edge of your board outside the final area place a small piece of aluminum foil.  That way you have a spot without any exposure at all.  Similarly cut a small notch in your artwork or have one side smaller than the PCB.  That way you get an area with 100% exposure without any loss through the  artwork.  Those two areas will work as a process reference and they have 100% contrast.  If they are good, then the issues are with the artwork.

Bertho