Hello everyone. Is there a better way to get the d...
# ieee-sscs-dc-21q3
l
Hello everyone. Is there a better way to get the design layouts images than just take a screenshot?
m
I think there is a klayout update where you can print the gds nicely (3D)
l
I've managed to print the GDS, but with a low quality and after some "hacks". I'm not used to work with klayout. The tapeout job initiated at the efabless website creates the full chip layout GDS, including the metal fill layer. I opened it with klayout and it has a cell for the full chip and another only for the metal fill. Then I saved the chip only cell as a separate GDS, opened it and printed it.
Is there a way to import the GDS from efabless Open Galaxy Desktop? Anything else? I printed the chip GDS and saved as a figure there but I couldn't export it back to my own computer. I had to take another screenshot from my browser with Open Galaxy opened.
t
(1) We know that the lack of data transfers out of Open Galaxy is an issue; it was done that way for security but we know we have to do something about it. If you can grab an efabless staff member (hint, hint), they can do it for you. Just don't abuse the privilege. (2) Magic has much better plots than any other tool, courtesy of a bit of code written by Rajit Manohar. The command is
plot pnm
, and PNM being an uncompressed format, you'll want to use the
convert
command to convert it to something like
png
. It does pixel-by-pixel antialiasing and so produces output that looks like a photomicrograph.
l
My problem with magic plot command is that it doesn't render the layers as seen in the GUI. Some layers, as the MiM capacitors and vias, are rendered as pitch black.
And the pnm plot is beautiful, vias and MiM rendered incorrectly. The problem now is to get it outside Open Galaxy. There are other issues too. I have to open the GDS file, select the metal fill cell, delete it, and then save the plot. The full GDS file is huge, so it takes a lot of time to load. 2.5 GB. The GDS without the metal fill is about 250 MB. The tapeout process should have an option to output the GDS without metal fill also.