--- In
Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@...> wrote:
>
>
> My stock includes 0.008 and 0.016 thick SS clad. I have some 0.032
> DS.
...
> Also, the thinner boards work much better in the laminator.
>
> I do have some 1/16" stock but as it doesn't fit in the laminator, I
> only use it when I need the extra strength.
>
I tend to prefer boards .033 mil and thinner. I prefer to standardize the X x Y dimensions to Eurocard (160mm x 100 mm) (I think Eurocard is the correct term) or more often half Eurocard (100 x 80mm). With standard dimensions for most of my projects I can stock small cases with a lot less hassle. I see so many projects that don't ∗quite∗ fit any available enclosure.
Not much that I want to build these days really takes up more than the half size card. I really don't like small items built on board thicker than 1/16" (preferably 0.030 mil) - it just seems clumsy.
Of course, it depends on the amount of flex the board is expected to encounter, as well as the frequencies and character of signals on the board. High quality board has well defined properties at high signal clock speeds & for RF, so it depends a lot on what you are doing.
I have wondered whether I tend too much to thinner board. But as time goes on and I do less and less through-hole and ever smaller boards, I sort of feel vindicated. I'd like to know what others think.
I have read somewhere that 1/2 oz copper is better for beginners because it reduces undercutting and gives a quicker etch. That seems somewhat credible especially in low current, small signal boards. I haven't used much stock that has more than 1 oz of copper, but 2 oz would seem like a good idea for motor controller boards and the like.
-- Dave