Well.....it depends on what kind of circuitry you are doing i.e digital,
multisided, high freq etc. and what process you intend to use i.e what
equipment do you have access to. Personally, I built a self-registering
negative-transfer frame, UV light box and agitating etch tank setup that
can repeatably PRODUCE double sided PCBs with 15 thou traces for about
$89.95....the process is actually quite straight forward and can readily be
gleaned from back issues of Radio-Electronics/Electronics Now.  Big hint:
use G.C Tech boards, MG Chemicals developer, stripper and tin plating
solutions and etch with Ammonium Persulphate.
Best of Luck,
KcW
----------
> From: Garrick A Kremesec <gkremese@ews.uiuc.edu>
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Printed Circuits Handbook
> Date: Monday, September 01, 1997 4:23 PM
>
> Is this a good reference book for making printed circuit boards?  Is it
> really worth $89.50?  Or, it there anther reference book that I should
> look at?  Thanks.
>
>
___________________________________________________________________________
> Garrick Kremesec                  | "There is no witness so dreadful, no
> University of Illinois U/C        |  accuser so terrible as the
conscience
> http://www.cen.uiuc.edu/~gkremese |  that dwells in the heart of every
> gkremese@uiuc.edu                 |  man." - Polybius