Homebrew PCBs

It does not have to be fine, unless you are at microwave and above frequencies. A course mesh is good enough, 1/4" is fine.

Some pcb packages have a mesh fill option.

Malcolm

 
I don't suffer from insanity I enjoy it!
Mene, mene, tekel, upharsin
The writing is on the wall.


________________________________
 From: sailingto <sailingtoo@...>
To: Homebrew_PCBs@yahoogroups.com 
Sent: Thursday, March 15, 2012 5:21 PM
Subject: [Homebrew_PCBs] Re: ground planes
 

  
I had wondered about the photo etch method and if it had this problem.

The mesh method is mentioned - do you mean use a very fine mesh pattern for the solid ground plane?  I'm not sure how to do this in Eagle or ExpressPCB programs.  Sounds like a good idea - mesh fine enough it "looks" solid on transfer?

With the normal transfer, the ground plane "looks" like it has good toner transfer - very black.  BUT, on etching it doesn't look so good with many tiny holes showing.

Thanks for the suggestions and info - I might have to try photo - etching.  That does seem to have better results.

Ken H>

--- In Homebrew_PCBs@yahoogroups.com, Malcolm Parker-Lisberg <mparkerlisberg@...> wrote:
>
> Use a mesh pattern, rather than solid. It happens because the electrostatic charge migrates from large areas.
> 
> Malcolm
> Â 
> I don't suffer from insanity I enjoy it!
> Mene, mene, tekel, upharsin
> The writing is on the wall.
> 
> 
> ________________________________
>  From: sailingto <sailingtoo@...>
> To: Homebrew_PCBs@yahoogroups.com 
> Sent: Thursday, March 15, 2012 3:15 PM
> Subject: [Homebrew_PCBs] ground planes
> 
> 
> Â  
> Does anyone have problems getting large ground plane areas to stay good 'n solid with copper?  I've been having a bit of problem with large ground plane areas using toner transfer method.  If I do a board without a large ground plane, the traces look good - trace size ranges from .015" to .050" or so.
> 
> I clean copper good, wash with alcohol.  Toner transfer at 360ºF with a laminator using Pulsar toner transfer paper, then etch in HCl and H2O2.  I used the green film last board and it seems a bit better, but not sure about large areas yet.
> 
> Just checking to see if anyone else has this problem, or maybe found a solution...... or maybe it's just me?
> 
> Thanks for any guidance and suggestions.
> 
> Ken H> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>


 

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