Homebrew PCBs

>From: Adam Seychell <adam_seychell@...>
>Reply-To: Homebrew_PCBs@yahoogroups.com
>To: Homebrew_PCBs@yahoogroups.com
>Subject: Re: [Homebrew_PCBs] UV plotting
>Date: Mon, 07 Jul 2003 17:29:40 +1000
>
>A UV LED will take you weeks to UV plot a board.
>
>See if you can buy a small powerful mercury vapor HID lamp (i.e.
>the kind of thing that needs lots of cooling or it will explode)
>, and make a light pen. Exposure time should be under 1 second
>if you want the pen velocity to be a reasonable rate.
>
>It does sound nice to cut out the photomask step and directly
>expose the resist, but unfortunatly the UV energies required for
>standard resists make it impracticle to do. Do a search for
>"direct laser imaging", or LDI.


Nichia also has a UV laser diode - 2 mW output at 375 nm.

Leon
--
Leon Heller, G1HSM Tel: +44 1424 423947
Email:leon_heller@...
My web page: http://www.geocities.com/leon_heller

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