Good try. KPR is a photoresist made by Kodak. It is good enough to do wafers.
It needs reasonably energetic UV to polymerize and then toluene to dissolve off the non-polymerized part for etching. D On Dec 25, 2007, at 4:15 PM, Kirk Wallace wrote: > KPR? > > Kentucky Paranormal Research > Kawartha Pine Ridge District Public School Board > > On Tue, 2007-12-25 at 15:42 -0800, Dave Engvall wrote: >> If anyone wants to etch a disc I can probably find an 30 mL or so of >> KPR. >> >> For best resolution make a 4X image and then photoreduce 4X on to >> film and use that to expose the >> KPR. It makes beautiful circuit boards that way. >> >> Dave > > Another thought that comes to mind is that, when I was looking into > making my own encoders, my design used a disk and two masks. The masks > were a portion of the disk placed one half line width apart on the > disk, > such that one or the other went black at half line intervals. This > allows you to have a large sensing area, and average out disk image > errors. This doesn't account for the index though. I guess you would > need a separate short lined section and another mask. > > -- > Kirk Wallace (California, USA > http://www.wallacecompany.com/machine_shop/ > Hardinge HNC lathe, > Bridgeport mill conversion, doing XY now, > Zubal lathe conversion pending) > > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
