Reversed layer naming

[Gustav Bergquist]

The layer stack is number from bottom and up. This is not industry standard.
It would be better if the gerber files came out as:
Top layer: Layer_1_top
inner layer 1: Layer_2
Inner layer 2: Layer_3
...
Inner layer 6: Layer 7
Bottom layer: Layer_8_bottom

Today the layers are numberd as:
F.Cu: F_Cu
6
...
2: inner_2
1: Inner_1
B.Cu: B_Cu

We just had a problem with a pcb-manufacturer, this issue created a great deal of confusion.
And since this is not industry standard I regard this as a bug.

[Lorenzo Marcantonio (l-marcantonio)]

On Tue, Oct 01, 2013 at 05:49:36PM -0000, Gustav Bergquist wrote:
> We just had a problem with a pcb-manufacturer, this issue created a great deal of confusion.
> And since this is not industry standard I regard this as a bug.

I know, but people in dev team are 'resilient' to changes. FYI it is an
industry standard: China manufacturers counts from bottom up:P

--
Lorenzo Marcantonio
Logos Srl

[Gustav Bergquist (gusber)]

Well, I guess that depends on which manufacturer you use in china.. no matter discussing which manufacturer do what :)
But then a map between pcbnew layers and gerber layer names should be implemented.

[Dick Hollenbeck (dickelbeck)]

On Oct 2, 2013 6:25 AM, "Gustav Bergquist" <email address hidden> wrote:
>
> Well, I guess that depends on which manufacturer you use in china.. no
matter discussing which manufacturer do what :)
> But then a map between pcbnew layers and gerber layer names should be
implemented.

Yes go ahead and do that for each project. Call it a README file, and the
map you can name "layer stackup".

Then when your board maker screws it up ask for your money back.

This is your industry standard.

>
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> https://bugs.launchpad.net/bugs/1233783
>
> Title:
> Reversed layer naming
>
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[Lorenzo Marcantonio (l-marcantonio)]

On Wed, Oct 02, 2013 at 11:58:18AM -0000, Dick Hollenbeck wrote:
> Yes go ahead and do that for each project. Call it a README file, and the
> map you can name "layer stackup".

It's called 'stackup drawing', our manufacturer requires it
anyway. Well, a drawing which it's a text file, anyway:P And it's
actually *more* important than simply the layer order since it also
contains copper thickness, cores and prepregs... a 4 layer could be done
with a core and two prepregs or two cores and one prepreg. Thermal and
electrical performance will be *quite* different.

If a manufacturer doesn't ask for such details (and doesn't give it's
default/budget stackup info), change manufacturer ASAP.

> Then when your board maker screws it up ask for your money back.

Determining the inner layer could be tricky and expensive (maybe using
microsections?)... just make sure it get the info correctly at order
time.

--
Lorenzo Marcantonio
Logos Srl

[Berk Akinci (berka)]

I second this request, and I too believe this is a bug.
There is no indication within the pcbnew application that my "layer 3" will be called "Inner1". This only shows up once the user opens the file in GerbView. I think that the layer name /I/ assigned should show up in the file name. This could be in addition to the "Inner#" naming or in place of it. This should /at least/ show up in the "Plot" dialog.
If this assignment can't be viewed from within pcbnew, and the naming can't be nailed down by the user, even a stack-up drawing is going to be error-prone.
Luckily I was careful enough to open everything in GerbView and confirm before making my order...