No idea.. thats what I want to find out. Currently...
# shuttlep
Paul Schulz
11/22/2020, 2:21 AMNo idea.. thats what I want to find out. Currently at the size of a transistor.. so if the images can see transistors they should be able to see the letters. The layout satisfies the sky130 design rules (in magic)
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Matt Venn
11/22/2020, 8:07 AMI spoke to Mikhail from zeptobars and he said: Smallest logo size which can be reliably seen optically with good details is around 10um.
Matt Venn
11/22/2020, 8:07 AMOn the layers – typically all the artwork is on the top layer
Matt Venn
11/22/2020, 8:08 AMIn the ideal case I will be able to shop:
Top metal optical photo. This is the fastest.
Polysilicon optical photo.
Polysilicon SEM photo, some places in high resolution to compare GDS vs layout (OPC e.t.c)
Crosssection of the chip/transistors – this is possible, but will require more time/more samples. Maybe special structures prepared in advance to make it look better with less trials : i.e. 2x 50um long transistors (N+P / maybe other types of transistors) with full stack of metal on top of them). So that I can cut across this reliably and show xsection to see how these specific transistors are made.