Homebrew PCBs

some interesting stuff here and a "How To" on UV .... :)
http://www.uvprocess.com/


  ----- Original Message ----- 
  From: Thomas 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Tuesday, October 05, 2004 11:57 PM
  Subject: Re: [Homebrew_PCBs] Re: OHP Film & Laser Printers, UV Laser Diode UV LED


  does anyone have any info about the photo Resist UV Spectrum range for "Kinsten Presensitized" PCB's ?
  I would like to look at this Laser/ UV LED in more detail , speed is not impotant right now but to get it working first will be nice ...
  Thomas


    ----- Original Message ----- 
    From: sciciora 
    To: Homebrew_PCBs@yahoogroups.com 
    Sent: Tuesday, October 05, 2004 8:31 PM
    Subject: [Homebrew_PCBs] Re: OHP Film & Laser Printers, UV Laser Diode



    I did some thinking about this as well.  I found on this list that
    some pre-sensitised PCB are sensitive in the range of 340 to 400 nm,
    and peak at about 360nm.  The LED that I bought has an output at
    405nm.  As far as power, just move slower!  A co-worker's friend, who
    works with optics as a consultant, said it wouldn't be hard to pick
    some lenses and fiber from Edmund scientific to foccus most of the
    LED's light into the fiber.  And if I were more serious I might be
    able to get him to help me design something, but due to too many
    projects, trying this will most likely just be a through experimnet
    for me...

    - Steven Ciciora

    --- In Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon_heller@h...>
    wrote:
    > 
    > >From: "Mike" <yahoo@d...>
    > >Reply-To: Homebrew_PCBs@yahoogroups.com
    > >To: Homebrew_PCBs@yahoogroups.com
    > >Subject: [Homebrew_PCBs] Re: OHP Film & Laser Printers,  UV Laser Diode
    > >Date: Sun, 03 Oct 2004 00:41:20 -0000
    > >
    > >
    > >
    > >--- In Homebrew_PCBs@yahoogroups.com, "Thomas" <teecee@c...> wrote:
    > >
    > > > This UV Laser thing has me thinking (dangerous I know)  so slap me
    > >for bringing this up !! but during a few search's I come across some
    > >info that uses a UV Laser Diode in a DVD-R Burner & goes on about
    > >Photoresist being part of the Layer that records the Data, if its
    > >similar stuff or not i dont know. Maybe the UV Laser is to small and
    > >possible the focal point could be changed  to get a wider beam for
    > >Exposure, sounds easy enough but I bet it aint !!
    > >
    > >Possibly more useful than Lasers, Non-laser UV LEDs are available on
    > >Ebay etc for around 10-20c each. They seem to work fine directly off
    > >2x1.5v AA cells. The beam is divergent at an angle of approx 20
    > >degrees on the ones I have. I would imagine that it would be
    > >focussable with relatively inexpensive lenses too, or get a bunch of
    > >fibre optics and adapt an old dot matrix printer :o)
    > 
    > 
    > The wavelength needs checking, to make sure it is correct. The power
    also 
    > needs to be checked, I don't think that UV LEDs will have enough power.
    > 
    > Leon





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