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Drilling hole sizes -- what are the differences?

Posted: Thu Feb 13, 2014 4:49 pm
by michael34
Hi,

In the specifications, the "drilling hole" is listed as a minimum of 0.3mm, and the finish hole is listed at a minimum of 0.8mm. What is the difference between these?

For example, if I want the smallest possible vias to connect my layers, could I use a hole drill size of 0.3mm? Or do I have to use 0.8mm?

Thanks,
Michael

Re: Drilling hole sizes -- what are the differences?

Posted: Thu Feb 13, 2014 8:46 pm
by mail25
0.3 vias available.
0.8 - smallest mounting hole, i think... mounting hole drilling in the end processing. they has not copper layer inside

Re: Drilling hole sizes -- what are the differences?

Posted: Mon Jan 07, 2019 6:24 pm
by catherine12297
0.3 vias accessible.
0.8 - littlest mounting gap, I think... mounting opening penetrating at last handling. they has not copper layer inside