Homebrew PCBs

On Mon, 5 Apr 2010 13:36:43 -0700, you wrote:

>What is the minimum pad size (in mils) for home made PC boards?  (Single
>Sided).

Through hole parts, possibly .040 to .066, big parts (power diodes),
larger.  

Depending on the process, that "typical" value can be smaller.  IMHO,
toner transfer likes .010 traces, can tolerate 0.04 pads (with 0.023
vias), and so.

Properly exposed photoresist can tolerate less, say .008 traces.  Much
depends on the physical size of the part, hole it needs, and the
process you use.  Add in current needed and size of trace, and you go
from signal ratings (what I gave), to power ratings, much larger.

Harvey

>
>Thanks,
>Chris Maness
>
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