Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Steve" <alienrelics@y...> 
wrote:
> 
> --- In Homebrew_PCBs@yahoogroups.com, "John" <DiamondDyn@a...> 
wrote:
> > 
> > Hello everyone..  forgive me for being so clueless.  i do some 
> > electronics work related to microcontrollers, embedded systems, 
and 
> > robitcs.  I've only done a few circuit boards myself and I 
barely 
> > know the basics.  I imagine that there's a lot more to know.  I 
was 
> > wondering how high the quality of the boards you people make 
are?  
> > Are you producing boards that are on a commercial level?  
Something 
> > people would buy? 
> 
> Isn't this a great list? I can say that without being immodest even
> though I'm the listowner, because the list is made by the people 
on it.
> 
> Take a look in the Files, under Photoetching and Ben Lanmon, 
here's a
> TinyURL link:
> http://tinyurl.com/6bykb
> 
> Also take a look in Photos. They run the gamut from good enough to
> work, to darn close to commercial quality.
> 
> Steve Greenfield

  With all respect Steve, the photo's there are quite far away 
from "commercial quality" as you named it. The problems begun when 
you need 100 similar boards with metalised through holes and able to 
be populate with just 0603 or 0805 series (and last one is huge!).
With a high component density and other than 100 mil DIP packages or 
50mil distance between pin to pin of SMD components. The other 
problem is the silk screen if needs less (or equal) of 10 mil 
resolution. Not the last one is the isolating varnish and thermal 
and mechanical resistange of this.
And a huge problem is when you need for instance a 15x15 inch board 
(or any other bigger dimension where the printing error will affect 
seriously the board quality).
  Prototyping yes. Very small series yes. But production never.

best regards,
Vasile
http://surducan.netfirms.com