🧪 SemiDevKit

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

SemiDevKit is a unified, open-source educational toolkit that spans the entire semiconductor device workflow —
from device physics and compact modeling (BSIM4) to SPICE simulation, reliability analysis (NBTI / HCI),
and OpenLane-based RTL-to-GDSII physical design.

🎓 Designed for students, researchers, and practicing engineers
🔧 Focused on practical, lightweight, and reproducible experimentation
📦 Built with Python, ngspice, and OpenLane

---

🔗 Official Links

🌐 Language	GitHub Pages	GitHub Repository
🇺🇸 English

---

📚 What You Can Learn with SemiDevKit

🔹 Device Physics

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

---

🔹 Compact Modeling (BSIM4)

• 🧩 Automatic BSIM4 model card generation
• 🧪 Physical-parameter-based extraction workflow
  • tox / Na / Vfb / μ₀ / L / W
• 🔁 TCAD → Compact Model consistency checks

---

🔹 SPICE Simulation

• 🔌 DC analysis: Vg–Id, Vd–Id
• 🌊 AC / CV analysis: Vg–Cgg
• 📐 Geometry scaling: L / W sweep
• 🧯 Reliability degradation:
  • NBTI
  • HCI

---

🔹 VLSI Physical Design

• 🏗 Lightweight OpenLane-Lite environment
• 🔁 Minimal example designs:
  • Inverter
  • SPM (standard primitive module)
• 🐳 Docker / 🪟 WSL2 ready
• 🧭 Full RTL → GDSII educational flow

---

🧩 Repository Structure (Conceptual View)

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-superstable
│
└── docs/
    └── Tutorials / Theory / Math / Examples

📌 Note: Actual folder mapping

• Device physics / TCAD → tcad/
• Compact modeling & SPICE → bsim/
• Physical design → openlane/
• Site & docs → docs/, assets/, _includes/, _layouts/

---

📁 Quick Navigation

Module	GitHub Pages	Repository
🔬 Device Physics / TCAD	Pages	Repo
🧩 BSIM4 & SPICE Suite	Pages	Repo
🏗 OpenLane-Lite	Pages	Repo
📘 Documentation	Pages	Repo

---

🚀 Getting Started

✅ Requirements

• 🐍 Python 3.10+
• NumPy / SciPy / Matplotlib
• 🔌 ngspice
• 🐳 Docker (for OpenLane-Lite)
• 🪟 WSL2 (recommended on Windows)

---

📥 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

---

▶ 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. Execute the full RTL → GDSII flow
4. Generate a verified spm.gds (Dec 2025)

---

📘 Documentation

All tutorials and theory notes are provided under:

docs/

Including:

• 📐 Device physics fundamentals
• 🧩 Compact modeling theory
• 🔌 SPICE simulation techniques
• 🧯 Reliability mechanisms (NBTI / HCI)
• 🏗 OpenLane RTL-to-GDS educational flow

---

👤 Author

Item	Details
👨‍🔬 Name	Shinichi Samizo
🧠 Expertise	Semiconductor devices (logic, memory, HV mixed-signal) Thin-film piezo actuators (inkjet systems) Printhead productization, BOM, ISO training
💻 GitHub

---

📄 License

Component	License	Notes
💻 Source Code	MIT License	Free use / modification
📄 Text Materials	CC BY 4.0 / CC BY-SA 4.0	Attribution required
🎨 Figures & Diagrams	CC BY-NC 4.0	Non-commercial only
🔗 External References	Original license	Proper citation required

---

💬 Feedback & Discussion

Suggestions, improvements, and technical discussions are welcome!