SemiDevKit

Open Educational Toolkit for Semiconductor Device Modeling, SPICE Simulation, Reliability Analysis, and VLSI Physical Design

SemiDevKit is a unified, open-source learning suite that covers the entire semiconductor device workflow:
from device physics and compact modeling (BSIM4) to SPICE analysis, reliability evaluation (NBTI/HCI), and OpenLane-based physical design.

It is designed for students, researchers, and engineers who want a practical and lightweight environment to explore the foundations of semiconductor devices and integrated circuit design.

🆕 Check the latest updates in the ChangeLog.
Review all recent modifications in the ChangeLog.

🔗 Official Links

Language	GitHub Pages 🌐	GitHub 💻
🇺🇸 English

📚 Features

🔹 Device Physics

• 1D Poisson & Drift–Diffusion solvers
• MOSFET Vg–Id / Vd–Id characteristics
• Ferroelectric P–E modeling (Landau–Khalatnikov)

🔹 Compact Modeling (BSIM4)

• Automatic generation of BSIM4 model cards
• Physical-parameter-based extraction workflow
  (tox / Na / Vfb / μ0 / L / W)

🔹 SPICE Simulation

• DC characteristics (Vg–Id, Vd–Id)
• AC characteristics (Vg–Cgg)
• Device dimension scaling (L/W sweep)
• Reliability degradation (NBTI & HCI)

🔹 VLSI Physical Design

• Lightweight OpenLane environment
• Minimal example design (inverter / SPM)
• Docker / WSL2 ready
• Full RTL → GDSII educational flow

🧩 Repository Structure

The conceptual structure of SemiDevKit (mapped to the actual folders above) is:

SemiDevKit/
│
├── device_physics/        (implemented in  tcad/ )
│   ├── TCAD_PLAYGROUND
│   └── TCAD_PLAYGROUND_PZT
│
├── compact_modeling/      (implemented in  bsim/ )
│   └── Paramus
│
├── spice_analysis/        (also under      bsim/ )
│   ├── BSIM4_ANALYZER_DC
│   ├── BSIM4_ANALYZER_CV
│   ├── BSIM4_ANALYZER_DIM
│   └── BSIM4_ANALYZER_RELIABILITY
│
├── physical_design/
│   └── OpenLane-Lite             (openlane/openlane-lite/)
│   └── OpenLane-superstable      (openlane/openlane-superstable/)
│
└── docs/
    └── (Tutorials, theory notes, math formulas, examples)

For the most up-to-date implementation, please refer to the actual folders:

• Device physics / TCAD → tcad/
• Compact modeling & SPICE analyzers → bsim/
• OpenLane-Lite physical design flow → openlane/openlane-lite/
• Site & documentation → docs/, assets/, _includes/, _layouts/

📁 Quick Navigation (Repository Modules)

SemiDevKit is organized into several major learning modules.
Use the badges below to jump directly to each folder.

🔸 Device Physics / TCAD

🔸 Compact Modeling & SPICE (BSIM4 Suite)

🔸 Physical Design (OpenLane)

🔸 Documentation

🔸 Site Assets

🔸 Jekyll Layouts

🚀 Getting Started

Requirements

• Python 3.10+
• NumPy / SciPy / Matplotlib
• ngspice
• Docker (for OpenLane-Lite)
• WSL2 (recommended for Windows users)

Clone the repository

git clone https://github.com/Samizo-AITL/SemiDevKit.git
cd SemiDevKit

Example: Run a SPICE DC simulation

cd bsim/BSIM4_ANALYZER_DC/run
python run_vd.py
python run_vg.py

(Adjust the path above according to the exact folder structure inside bsim/.)

Example: Run OpenLane-Lite flow

cd openlane/openlane-lite
./docker/run_in_docker.sh

This will:

1. Launch the OpenLane 2023 container
2. Use the included minimal spm design
3. Run the full RTL → GDSII flow
4. Generate a verified spm.gds (Dec 2025 result)

📘 Documentation

Comprehensive tutorials, equations (MathJax), workflows, and examples will be provided under:

docs/

Including:

• Device physics background
• Compact modeling theory
• SPICE simulation techniques
• Reliability mechanisms (NBTI/HCI)
• OpenLane RTL-to-GDS educational flow

👤 Author

Primary developer and author of this educational toolkit.
Professional background in semiconductor devices and inkjet actuators, creating learning materials that integrate theory, simulation, and practical engineering insights.

📌 Item	Details
Name	Shinichi Samizo
Education	M.S. in Electrical and Electronic Engineering, Shinshu University
Career	Former Engineer at Seiko Epson Corporation (since 1997)
Expertise	Semiconductor devices (logic, memory, high-voltage mixed-signal) Thin-film piezo actuators for inkjet systems PrecisionCore printhead productization, BOM management, ISO training
Email
X (Twitter)
GitHub

📄 License

SemiDevKit adopts a hybrid licensing approach tailored to the nature of each component—source code, text materials, and graphical content.

💬 Feedback

Suggestions, improvements, and discussions are welcome via GitHub Discussions.