On Sun, 26 Feb 2012 09:11:33 -0800 Kirk Wallace <kwall...@wallacecompany.com> wrote:
> On Sun, 2012-02-26 at 08:48 +0000, Steve Blackmore wrote: > ... snip > > Most have a resolution of 1200 dpi in mono. I've done PCB masters on > > transparency film with 5 thou lines for contact printing (UV) then > > etching. > ... snip > > >From my experience using my laser printer and overhead > >transparencies is > that the laser puts down a dot size of a .001" minimum, so the edges > of features are usually stepped, which I think would be harder to > deal with for this application. Looking at the store bought encoders > I have, the features have smooth edges at the maximum magnification I > can muster. A larger sensor area and mask could possibly even out the > jaggy effect though. > If anyone is really desperate I think I still have some KPR (Kodak photoresist) around. IIRC ... vacuum pull down the photomask over the substrate (board) expose with UV. Develop with toluene. Etch. Since I'm a packrat (I'm obviously relate to Neotoma cinerea ) ;-) the KPR is tucked away someplace. It may have auto-polemerized. Dave ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
