There are still a lot of single sided boards done for things like
lighting panels, circuit breakers, thermostats, places with more
mechanical constraints than electrical.  My company builds underwater
robots and about half our boards are single sided.
In high volume single sided boards are cheaper because they can be
punched instead of drilled.  There are also double sided NON-plated
through boards, for special applications.

Check out the site www.pcdmag.com which is the site of Printer Circuit
Design magazine.

Sherpa Doug

> -----Original Message-----
> From: Robert E. Griffith [mailto:bob@JUNGA.COM]
> Sent: Monday, July 30, 2001 3:51 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: PCB Board houses
>
>
> The trick is probably finding a good board house that still
> caters to the
> single sided board market and does enough volume to take
> advantage of the
> lower cost.
>
> I think most board houses saw that the future of single sided
> boards is dead
> and went with new equipment and stock that assumes at least
> double sided.
> That new equipment is expensive up front, but allows them to crank out
> boards very cheaply and pass the savings onto you as long as
> they do enough
> volume to utilize it fully, It's quicker and easier for them
> to run a common
> (2-sided) board through their equipment and processes than to
> do something
> out of the ordinary - even if that out of the ordinary
> something is more
> simple.
>
> Now if you are building the boards yourself, it still holds
> true that more
> simple is less costly.
>
> --BobG
>
>
>
> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On
> Behalf Of Garber, Mike
> Sent: Monday, July 30, 2001 3:34 PM
> To: PICLIST@MITVMA.MIT.EDU
> Subject: Re: [PIC]: PCB Board houses
>
> >         The price for PCBs will be about the same for single
> > or doubled
> > layered.  The reason is that it takes about the same amount
> > of time to make
> > a single sided board as it does to make a double sided board.
> >  Some times a
> > single sided board is more expensive because copper clad
> > board has copper on
> > both sides already which means that the board huse has to
> > remove all of the
> > copper on one side, this can take a long time.
> >
>
> Really?   This doesnt quite have the "ring of truth" to it.
> I mean.... the entire plated thru process is skipped.
> And I gotta beleive that single sided stock is cheaper
> than double sided stock.
>
> And as far as longer etching time for double sided stock....
> I dont beleive it.
>
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