On Sunday, 23 February 2020 10:49:42 GMT Ralph Corderoy wrote:
> Anyway, the point of this email is one of the Q&A about fifty minutes
> referred to what sounded like a ‘DT layer’ and I don't know what that
> is.
I'm not skilled in the art of PCB design, but my partially informed guess
would be 'Drilling Template' layer.
When PCB CAD software lays out the tracks there are numerous holes needed to
insert the component legs through; each of these has a solder pad in the
layout, so it is important that the hole ends up in the middle of the pad :-)
There are other holes needed; plated through holes to link tracks to tracks on
other layers, holes to secure large components to the board with screws etc
and holes to secure the PCB into the enclosure.
That what I would understand if someone talked to me about a Drilling
Template. I don't recall our draughtsmen ever referring to a DT Layer, but
there was probably no reason why they would to me.
--
Terry Coles
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