SkullFET

Skull shaped MOSFET cells for SKY130 and IHP SG13G2 130 nm processes

List of cells

• Inverter
• NAND

Prerequisites

You need to SkyWater's SKY130 PDK installed in order to build the cells. Set the PDK_ROOT environment variable to point to the root of the PDK installation. You can use volare to install the PDK (and then set PDK_ROOT to ~/.volare).

Usage

• Run make to build the GDS/LEF files
• Run make sim_nand to run a simulation of the NAND cell (requires ngspice-41 or newer)

GDS Generation

This project now supports direct GDS generation using the gdstk library:

1. Install dependencies:

   pip install -r requirements.txt
   

2. Generate the Inverter GDS file:

   python scripts/skullfet_gds.py
   

   To generate the NAND cell, use:

   python scripts/skullfet_gds.py -t nand
   

Copyright (C) 2021-2025 Uri Shaked