Hi Wayne,

Thanks for your email.
I did some changes in kicad source code with the below source files, it
mainly focuses on some copy/paste.
After a simple check, my code seems to work that adding more 34 copper
layers in KiCAD.

Could you please kindly check if those files are enough?
[image: image.png]

Sincerely
Liang

On Fri, 24 Feb 2023 at 00:45, Wayne Stambaugh <[email protected]> wrote:

> Hi Liang,
>
> The LSET object is merely where it's possible to add new layers but doing
> so will not be helpful and possibly harmful if you don't understand how
> layers work internally.  Virtually every object on boards and footprints
> has to understand what the layers mean in order for them to work properly
> and the tools used to create and edit them.  This doesn't include all of
> the DRC and UI changes that would have to be updated for the layer
> changes.  I don't see this feature request being done by anyone without
> years of experience with the KiCad code base.  It is a major undertaking.
> It's on the development team's list of new features but it's not one that
> is requested very often (there are just not that many users that require
> more than 32 copper layers) so it may not make it into version 8.
>
> Cheers,
>
> Wayne
> On 2/22/23 9:47 PM, Liang Jia wrote:
>
> Hi Stefan,
>
> Thanks for your reply.
> Our products are for chip tests.
>
> I already know the limitation for KiCAD and this ticket.
>
> I want to know if I try to add more layer support in KiCAD, which part of
> the source code should I pay attention to? bitset for LSET?
>
> SIncerely
> Liang
>
> On Wed, 22 Feb 2023 at 18:06, Stefan Weber <[email protected]> wrote:
>
>> Hi Liang,
>>
>> There is already a wishlist's gitlab ticket for this
>>
>> https://gitlab.com/kicad/code/kicad/-/issues/7232
>>
>> You might give a thumbs up there ;-)
>>
>> And BTW. 50 copper layer, really?
>> I am curious what are you designing?
>>
>> As you can see here
>> https://docs.kicad.org/7.0/en/pcbnew/pcbnew.html#capabilities
>>
>> > KiCad is capable of creating printed circuit boards with up to 32
>> copper layers,
>> > 14 technical layers (silkscreen, solder mask, component adhesive,
>> solder paste, etc), and 13 general-purpose drawing layers.
>>
>> So when you don't need 50 copper layer, there might be already enough
>> layers ;-)
>>
>> Best regards,
>> Stefan
>>
>> [email protected] schrieb am Mittwoch, 22. Februar 2023 um 08:18:46
>> UTC+1:
>>
>>> Hi Dear KiCAD Group,
>>>
>>> We want to use KiCAD for our products, but we found one limitation which
>>> block us.
>>> The max copper layer is 32 now. but our products need more than 50
>>> layers.
>>> I searched the group, there are not related information, so I start this
>>> conversation.
>>>
>>> I have two questions?
>>> 1. Why there is only 32 layers in KiCAD?
>>> 2. If we want to adapt the code of KiCAD to support more higher layer,
>>>      Is it possible?
>>>      Which point we should take care?
>>>
>>> Sincerely
>>> Liang
>>>
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