Hi,

[10/28/21 06:10:29 PDT] FAILURE
            2 Check(s) Failed: ['Klayout BEOL', 'Klayout Pin Label Purposes Overlapping Drawing'] !!!

Getting these errors while running pre-check job. Can someone please help me with this? What does it mean? Thread in #shuttle

@User Just a guess, but check your layer purpose pairs. You may be using a layer that is supposed to be a pin label as a drawing layer. I believe pin layers should always be enclosed by pin drawing. It may also be that your pin label origin is not over the appropriate drawing pin or drawing layer.

Ah thank you so much Mitch for your reply, @User, @User can you please follow up with this error?

Ummm... Are you saying that the pins should be on

pin label layer

but in our case for some reason they are at

metal drawing layer

? @User

@User From what I heard, there were some designs that had `pin layer`s without

drawing

layers. LVS considered them to be the same layer, but `pin layer`s were not used in the actual masks. I believe the DRC rule is that `pin layer`s must be enclosed be the

drawing

layer. There may also be a rule for `pin label`s whose origin is not inside a

pin

layer. There should be a log file with the error markers.

layer purpose pair

is Cadence virtuoso terminology that roughly corresponds to GDS

layer number

and

data type

. In klayout, you can see it as a number in the form of

8/50

after the layer name.

ok so if I understand this correctly, the IOs should have both

pin layer

as well as

drawing layer

@User thanks for the picture. Can you change the color of

met2.pin

? It would make it easier to visually check. Is the origin of

analog_io[17]

inside

met3.pin

or on the border? Did you locate the error flag file to find the exact error location?

Is it better, I am color blind so these colors work differently for me

To me, it looks like the pin for

io_oeb[23]

is missing

met2.drawing

. Can you send a screen shot with

met2.pin

off?

io_oeb[23]

is fine I would have to look at other pins

Does the DRC report give you any coordinates?

I am shared this snippet from my other team member responsible for submission process. I would have a meeting to go through the log file in detail to see if there are any information. At least this snippet proves that the error is what you mentioned,

pin layer and drawing layer

@User How about

precheck_results/<timestamp>/out_pin_label_purposes_overlapping_drawing_check.xml

I am browsing through it atm

@User I think you can load this into klayout. Tools->Marker Browser

I have been looking at the wrong IOs, the problem is not with the IOs of wrapper but with the IOs of macro.

Sorry, I don't know anything about innovus.

oh a pity, nevertheless, thanks for your patience and the help.

Thanks @User.

Though I still have a question why is there a pin layer in the first place if it does not have any actual mask? Having the drawing layer would not suffice?

May have something to do with LEF generation.