Home built PCBs
- To: misc
- Subject: Home built PCBs
- From: Jaap van Ganswijk <ganswijk@xxxxxxxxx>
- Date: Thu, 20 Nov 1997 03:09:14 +0100
Hi,
Is this what was asked about in the other email?
Greetings,
Jaap
>Date: Wed, 19 Nov 1997 16:44:40 -0500
>From: "Richard Mustakos, VMI '82" <mustakos@mrj.com>
>Reply-To: mustakos@mrj.com
>Organization: mrj.com
>X-Mailer: Mozilla 3.0Gold (WinNT; I)
>To: ganswijk@xs4all.nl
>Subject: Home built PCBs
>
>I don't remember where, but some time ago I read an article on
>environmentally sound home manufacture of PCBs. The upshot is that you
>can have as complex a design as you want, in terms of layers, but that
>you need to make a through hole mask as well.
>
>You Need:
> a sturdy piece of thin fiberglass (or some other insulator)
> a laser printer with a straight through paper path
> conductive paste, I think it is silver based, but there may
> be
> a squeegee
>
>The procedure is this:
> Make each lead mask layer,
> Make a through hole layer
> Invert all layers (traces white and open space black)
>
> print side 1 negative on the plate
> squeegee conductive paste into the places where there is no toner
> (I think you bake it to set the paste, but I'm not sure)
> print though hole layer negative on top of side 1
> squeegee conductive paste into the places where there is no toner
> bake, if needed
> print side 2 negative on the plate
> squeegee conductive paste into the places where there is no toner
> bake, if needed
> print though hole layer negative on top of side 2
> squeegee conductive paste into the places where there is no toner
> bake, if needed
> print side 3 negative on the plate
> squeegee conductive paste into the places where there is no toner
> bake, if needed
> print though hole layer negative on top of side 3
> squeegee conductive paste into the places where there is no toner
> bake, if needed
> ...
>
>The procedure is most likely clear by now ;)
>
>Good points:
> There are no chemical pollution as a result of this process
> It will make boards of arbitrary complexity
>
>Bad points
> your laser printer has to register fairly well
> you have to be good with a squeegee
> you have to be careful not to damage the existing traces
> it is labor intensive
> I think the conductive paste is expensive, but I'm not sure
> you can only solder to one side, so you can only have components on
>one side unless you do surface mount for some and dips for others, then
>the dips have to be on one side, and the surface mounts have to be on
>the other.
>
>I'd like to give credit, 'cause I kow this is someone elses idea, but
>I'lll be damned if I know whose.
>Good luck
>RM
>
>
Greetings,
Jaap
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