Homebrew PCBs

Jonathan,
I have used that process, even used the same resist at one of my former 
jobs. It worked ok once you get
a handle on applying the resist.
Bill Higdon
Jonathan W wrote:

> --- In Homebrew_PCBs@yahoogroups.com, "Marty Grove" <MartyGrove@c...>
> wrote:
> > This is a good question. I hadn't thought of this while considering the
> > possibilities of building boards at home.  Although I rarely got
> involved
> > with the solder masking of boards. I generally worked around the wet
> > processing steps. developing, etching, & stripping, and chemical /
> > mechanical cleaning, the processes that I am aware of are liquid
> solder mask
> > (typically applied by screen printing) and dry film solder mask.  Both
> > methods require special equipment; not something I would think would
> fall
> > into the "homebrew" category.
>
> In a small semiconductor research lab in which I work, we regularly
> apply photoresist to silicon wafers using a spinner.  Is there some
> reason such a process, using a clamped PCB board and a
> servo-controlled motor, couldn't work for applying liquid photoresist
> to copper-clad boards, as well?  Seems to me almost a homebrew solution.
>
> Jonathan
>