kicad-developers team mailing list archive

[Mark Roszko <mark.roszko@xxxxxxxxx>]

>.B_ImpedanceControlled,(Yes|No)


Simple true false but is there a mechanism to actually call out impedance
of traces on the gerbers? Otherwise I have to send the fab a drawing
instead of job file so they know what traces they need to
redimension/adjust to match the random FR-4 they are using.

On Wed, Nov 29, 2017 at 8:11 PM, Mark Roszko <mark.roszko@xxxxxxxxx> wrote:

> .B_Substrate,<substrate>{,<substrate>}
> <substrate>=(FR4|Polyimide|Polyolefin|
> Al|PTFE|Teflon|Ceramic|<s>)
>
> Is that supposed to be a list in a particular order of layers? I don't see
> otherwise how to define a specific layer to a specific substrate.
>
> On Wed, Nov 29, 2017 at 9:43 AM, jp charras <jp.charras@xxxxxxxxxx> wrote:
>
>> As you know, Kicad is currently supporting a Gerber Job file to store
>> some technical info needed to
>> make a board and cannot be stored in .gbr files.
>>
>> For instance board stackup info (list of .gbr files related to the
>> project, copper thickness,
>> dielectric ...)
>>
>> Recently, I sent a RCF about a first draft of Gerber Job file an received
>> two important comments,
>> that asked for more info related to dielectric.
>> This info is now included in latest Gerber Job file format.
>>
>> Ucamco (the company which manages the Gerber format) fully appreciated
>> this help, and send me the
>> latest draft of the Gerber Job file format to get comments about this
>> version.
>>
>> Here is the mail I received:
>>
>> > Hallo JP,
>> >
>> > Attached is the latest draft of the draft. I think we are nearly done.
>> Drafts have been open for nearly a year, and I would like to close this in
>> the coming weeks. Please let us know if there are comments, best before it
>> is closed.
>> >
>> > The KiCad community gave useful input earlier in the process.
>> Furthermore, KiCad generates a lot of jobs. Would it be possible to
>> circulate this late draft too?
>> >
>> > With kind regards,
>> >
>> > Karel Tavernier,
>> > Managing Director
>>
>>
>> So I'll be happy if experienced guys who know very well problems related
>> to the technical info that
>> must be stored in this kind of file (usually users send a text file to
>> explain these requirements)
>> could have a look at this doc, and send comments (missing info or any
>> other problem)
>>
>> Thanks.
>>
>> Kicad is very well supported by Ucamco.
>>
>> --
>> Jean-Pierre CHARRAS
>>
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>>
>
>
> --
> Mark
>



-- 
Mark