I don't think there is a easy way to get better uniformity. A spray etcher
may not be that much more complicated in the end.
For now i'm satisfied with what i have. The underetching is OK down to
like 6.66mil which is the smallest i'll need for a long time.
Also, by using ground planes one can keep "open areas" to a minimum and
there's no need to wait for them to finish.
ST
On Fri, 23 Dec 2005 10:43:53 +0100, adicont2 <adicont2@...> wrote:
>
> We must learn this: suction cup is a verry good ideea to make huge
>
> pads
>
> I refer to a one side board. You are wright, this system is not
>
> applicable to 2 side boards. A frame system is better.;-)
>
>
> About spiral patern: I'm not sure is working...it's a complicated
>
> question. In teory is working, but...
>
> Maybe we sould talk whith a fluids dinamics engineer to give us some
>
> advices
>
> Or make some experiments.
>
>
> The magnets is the easyest way to rotate the board. I like this.
>
> There is the easyest alternative to vibrating the board. I have an old
>
> shaveing machine for this job. But same problem: the bottom will be
>
> over etched. So let's return to rotating ideea...
>
>
> Some experiments is a must...
>
>
>
> Adrian