Best approach for chip size other than 10 x 10 mm?

[zachparrott]

Hi. I have been enjoying incorporating KQCircuits in my workflow, but not sure best way to proceed with writing chip classes for designs for sizes other than 10 x 10 mm. I know in the produce_n_launchers method of the Chip class I can pass the chip_box parameter but wasn't sure if there was another preferred way?

[qpavsmi]

Hi, I'm so glad to hear that you are using KQCircuits!

The preferred way to set the dimensions of your chip is to add the following class decorator before your chip class definition:

@add_parameters_from(ChipFrame,
                     box=pya.DBox(pya.DPoint(0, 0), pya.DPoint(20000, 20000)))
class YourChip(Chip):
...

Set the DBox dimensions to your liking, and it doesn't need to be a perfect square.
If you are considering to create a flip chip, to set the chip dimensions of other chips in the stack, add another decorator like this:

@add_parameters_from(Chip,
                     face_boxes=[None, pya.DBox(pya.DPoint(1500, 1500), pya.DPoint(18500, 18500))])

The first element None will define the first chip to use the dimensions defined in box parameter, and the next DBox element will set dimensions of the second chip on top.

Make sure to check what other parameters need changing after changing the chip dimensions, for example frames_marker_dist.

Hope this helps you started and let me know if this causes other issues.

[zachparrott]

Thanks for the quick reply and help Pavel!