Dosman at 15:02, 25 September 2012

Dosman — Tue, 25 Sep 2012 15:02:46 GMT

Dosman: New page: We need a fast and reliable method of PCB etching for the space, I intend to build a bubbler etcher and get us setup to use air regenerated acid cupric chloride. First some research: ====...

Dosman — Mon, 22 Aug 2011 04:47:39 GMT

New page: We need a fast and reliable method of PCB etching for the space, I intend to build a bubbler etcher and get us setup to use air regenerated acid cupric chloride. First some research: ====...

New page

We need a fast and reliable method of PCB etching for the space, I intend to build a bubbler etcher and get us setup to use air regenerated acid cupric chloride. First some research:

==== Chemicals ====
* [http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/index.html]

* [http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/ http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/]

From the instructable:
<pre>
Bottom Line:

Two things to maintain: CuCl2 levels and acid levels.

CuCl2: After all the peroxide is used up, and the solution starts turning brownish, you'll have to add oxygen
to regenerate the solution again: toss in a few more capfuls of peroxide or bubble air through the solution or
swirl it around vigorously, or just pour it into an open container and wait. It's easy to tell when you're ready to
etch again, because the solution turns green.

It's also impossible to add too much oxygen by adding air, so bubble/swirl to your heart's content. If you're
using peroxide to add oxygen, be sparing -- a little goes a long way, and it's mostly water so you're diluting
your etchant by adding it.

Acid: Note that HCl is being consumed in the starter etchant and the regeneration reactions. So we're going to
have to add a bit more acid as time goes by. If you notice that it's harder to re-green your brown etchant, it's
probably time to start thinking acid.

I've tried the titration described on Adam's site a couple times, and it's pretty easy but requires an accurate scale
and pure lye (back to the hardware store...). It's easier to just toss in a capful of acid every few batches of boards,
which seems to do the trick for me.
</pre>

==== Bubbler Bath ====
* [http://www.youtube.com/watch?v=DXjWZ9gJ4XE http://www.youtube.com/watch?v=DXjWZ9gJ4XE]
* [http://www.instructables.com/id/DIY-PCB-Bubble-Etch-Tank/ http://www.instructables.com/id/DIY-PCB-Bubble-Etch-Tank/]

@@ Line 1: / Line 1: @@
-We need a fast and reliable method of PCB etching for the space, I intend to build a bubbler etcher and get us setup to use air regenerated acid cupric chloride. First some research:
+We need a fast and reliable method of PCB etching for the space, I intend to build a bubbler etcher and get us setup to use air regenerated acid cupric chloride.
 ==== Chemicals ====
@@ Line 33: / Line 39: @@
 * [http://www.youtube.com/watch?v=DXjWZ9gJ4XE http://www.youtube.com/watch?v=DXjWZ9gJ4XE]
 * [http://www.instructables.com/id/DIY-PCB-Bubble-Etch-Tank/ http://www.instructables.com/id/DIY-PCB-Bubble-Etch-Tank/]

PCB Etching - Revision history

Dosman at 15:02, 25 September 2012

Dosman: New page: We need a fast and reliable method of PCB etching for the space, I intend to build a bubbler etcher and get us setup to use air regenerated acid cupric chloride. First some research: ====...