Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

>> Stuart Schaffert wrote:
>> OK, I'll bite. Why do UV tubes give better
>> resolution than UV LEDs?

> Leon wrote:
> Collimation.

And intensity.

A 60 second exposure with a UV tube will give
harder edges to the resist than a 10 minute
exposure with a lower intensity source.

And uniformity as someone else also pointed
out.