Here's the procedure using Photoshop
1.) Load the board image
2.) select magic wand - make sure anti-alias & contigous is disabled.
3.) click/select the black color (non copper area)
this will select all the black color since contigous option is disabled.
4.) contract the selection/marque to 5 pixels.
From Menu: Select->Modify->Contract, then choose 5.
5.) Hit del key, to delete the selection/marque.
6.) Now etch the PCB with your favorite solution.
STEP 1.) ∗∗∗ THE ORIGINAL BOARD FROM EAGLE ∗∗∗∗
STEP 4.) ∗∗∗∗ LOADED INTO PHOTOSHOP, MARQUE SELECTED AND CONTRACTED TO 5 PIXELS ∗∗∗
STEP 5.) ∗∗∗ DONE!!!! ∗∗∗ ISOLATED TRACES READY TO BE ETCH ∗∗∗
Mike Young <
mikewhy@...> wrote:
Excellent! Post process the image. :) I'll give the magic wand a swing or
two this evening, too.
8 pixels is probably just right for 600 dpi, a touch more than 13 mil. I
might go a bit more generous on the bus side.
----- Original Message -----
From: <pinoy_nyc@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, November 21, 2005 8:56 AM
Subject: Re: [Homebrew_PCBs] Mechanically Etch Style
> Hi Mike,
>
> Oh I see, it's isolation etching. Thanks.
>
> I just tried experimenting with photoshop and able to produce it
> Isolation etching in
> about 30 seconds from the original eagle board image.
> what I did is select all the non copper area (black color) and contract
> the selection
> into 8 pixels. by doing Select->Modify->Contract and the flooding the
> selection with
> white. It looks ok though...
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