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I have a question about making bonding pads in magic. I want to create a passivation cut on the pad ...
# magic
m
I have a question about making bonding pads in magic. I want to create a passivation cut on the pad I am making, so I see sky130 has a "pad" layer. However, when I refer to a standard pad in the sky130 I/O library, the "glass" layer is used instead of the "pad" layer. What is the meaning of the "glass" layer - is it a glass cut/opening? Is there any documentation on this?
x
I believe the glass layer is the passivation cut. Haven't found any documentation on it before, so I'm also interested in this post
t
Yes, "glass" is passivation cut. "pad" is equivalent to metal5 + a pad ID marker layer.
m
What is the pad ID marker layer?
When I view my GDS in klayout after fill is added during tapeout, I see a "pad" layer instead of a "glass" layer. Whereas in magic I used the layer "glass" to create the passivation cut. Are these the same layers or is this something I should expect to see?
t
That's the same layer. "PAD" is the official foundry name for the mask layer. The layer name "glass" has traditionally been used in Magic for the passivation cut since the 1980s.
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