Jhon Pinto

02/27/2023, 4:47 PM
Hi everyone! Does someone know where can I find the electrical properties for the following materials used in Sky130? • nwell • pwell • nsubstratediffusion /nsubstratediffusioncont • psubstratediffusion /psubstratediffusioncont • ndiode /ndiodec • pdiode /pdiodec

Tim Edwards

02/27/2023, 5:03 PM
Those are layers in magic. . . Magic uses many more "derived" layers, especially for identifying devices (thus "ndiode" and "pdiode", which otherwise are just diffusion with a diode identifying marker layer on top). "nwell" is just nwell, and properties can be found in the documentation (e.g., resistance 950 ohms/square). "pwell" is the substrate, unless it's inside a deep nwell structure, in which case it's an isolated p-region. "nsubstratendiffusion" = TAP + NSDM "psubstratepdiffusion" = TAP + PSDM