transistor-models

Complete PTM (Predictive Technology Model) MOSFET model library from mec.umn.edu/ptm, covering all nodes: bulk conventional 180/130/90/65nm, bulk HP/LP 45/32/22nm (BSIM4), and PTM-MG multi-gate FinFET 7/10/14/16/20nm (BSIM-CMG, HP + LSTP). No manual downloads required after installing this skill. Independent of the gmoverid skill — can be used directly in any ngspice/HSPICE project.

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安装方式

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name	transistor-models
description	Complete PTM (Predictive Technology Model) MOSFET model library from mec.umn.edu/ptm, covering all nodes: bulk conventional 180/130/90/65nm, bulk HP/LP 45/32/22nm (BSIM4), and PTM-MG multi-gate FinFET 7/10/14/16/20nm (BSIM-CMG, HP + LSTP). No manual downloads required after installing this skill. Independent of the gmoverid skill — can be used directly in any ngspice/HSPICE project.

Transistor Models Skill — Complete PTM Library

Important — do not modify skill files during normal use. When using models, copy the required .lib files into the user's project directory (outside .claude/). Do not modify or delete files inside the skill's assets/models/ directory. Only update the skill's internal files when the user explicitly asks to refresh the model library.

Source: All model files are from PTM — Arizona State University (ptm.asu.edu), free for academic research.

Citations:

Bulk CMOS nodes: W. Zhao and Y. Cao, "New Generation of Predictive Technology Model for Sub-45 nm Early Design Exploration," IEEE Trans. Electron Devices, vol. 53, no. 11, pp. 2816–2823, Nov. 2006. doi: 10.1109/TED.2006.884077
PTM-MG FinFET nodes: S. Sinha, G. Yeric, V. Chandra, B. Cline and Y. Cao, "Exploring sub-20nm FinFET design with Predictive Technology Models," DAC 2012, pp. 283–288. doi: 10.1145/2228360.2228414

Directory Structure

assets/models/
├── bulk_cmos/              — Bulk CMOS (BSIM3v3 / BSIM4)
│   ├── ptm180.lib          — 180nm conventional
│   ├── ptm130.lib          — 130nm conventional
│   ├── ptm90.lib           — 90nm conventional
│   ├── ptm65.lib           — 65nm conventional
│   ├── ptm45hp.lib         — 45nm HP
│   ├── ptm45lp.lib         — 45nm LP
│   ├── ptm32hp.lib         — 32nm HP
│   ├── ptm32lp.lib         — 32nm LP
│   ├── ptm22hp.lib         — 22nm HP
│   └── ptm22lp.lib         — 22nm LP
└── finfet/
    ├── models              — PTM-MG library entry point (.LIB ptm{n}hp / ptm{n}lstp)
    ├── param.inc           — Shared parameters (fin_height/fin_width/lg/vdd, per node)
    ├── hp/                 — HP nodes: {7,10,14,16,20}nfet.pm / pfet.pm
    └── lstp/               — LSTP nodes: {7,10,14,16,20}nfet.pm / pfet.pm

Model Reference

Bulk CMOS — Conventional (BSIM3v3/BSIM4, combined NMOS+PMOS)

File	Node	VDD	Model names
`bulk_cmos/ptm180.lib`	180nm	1.8V	`NMOS` / `PMOS`
`bulk_cmos/ptm130.lib`	130nm	1.3V	`nmos` / `pmos`
`bulk_cmos/ptm90.lib`	90nm	1.2V	`nmos` / `pmos`
`bulk_cmos/ptm65.lib`	65nm	1.1V	`nmos` / `pmos`

Bulk CMOS — HP/LP (BSIM4, combined NMOS+PMOS)

File	Node	Type	VDD	Model names
`bulk_cmos/ptm45hp.lib`	45nm	HP	1.0V	`nmos` / `pmos`
`bulk_cmos/ptm45lp.lib`	45nm	LP	1.1V	`nmos` / `pmos`
`bulk_cmos/ptm32hp.lib`	32nm	HP	0.9V	`nmos` / `pmos`
`bulk_cmos/ptm32lp.lib`	32nm	LP	1.0V	`nmos` / `pmos`
`bulk_cmos/ptm22hp.lib`	22nm	HP	0.8V	`nmos` / `pmos`
`bulk_cmos/ptm22lp.lib`	22nm	LP	1.0V	`nmos` / `pmos`

FinFET — PTM-MG Multi-Gate (BSIM-CMG)

Entry file: finfet/models — select node and type via .lib section tag:

Tag	Node	Type	VDD
`ptm20hp`	20nm	HP	0.9V
`ptm16hp`	16nm	HP	0.85V
`ptm14hp`	14nm	HP	0.8V
`ptm10hp`	10nm	HP	0.75V
`ptm7hp`	7nm	HP	0.7V
`ptm20lstp`	20nm	LSTP	0.9V
`ptm16lstp`	16nm	LSTP	0.85V
`ptm14lstp`	14nm	LSTP	0.8V
`ptm10lstp`	10nm	LSTP	0.75V
`ptm7lstp`	7nm	LSTP	0.7V

FinFET model names are nfet / pfet (subckt-wrapped); use NFIN to set the number of fins.

ngspice Usage

Loading a Bulk CMOS File

* Load 45nm HP (contains both nmos and pmos models)
.include "models/bulk_cmos/ptm45hp.lib"

* Instantiate NMOS
M1  drain  gate  source  bulk  nmos  W=1u  L=45n

Loading a PTM-MG FinFET

* Load 7nm HP FinFET
.lib "models/finfet/models" ptm7hp

* PTM-MG model names are nfet / pfet
* Use NFIN (number of fins) instead of W
M1  drain  gate  source  bulk  nfet  NFIN=1  L=7n

Model Type Quick Reference

Model	ngspice LEVEL	Applicable nodes	Notes
BSIM3v3	8	180nm–250nm	Mature bulk CMOS
BSIM4	54	65nm–22nm	Bulk HP/LP
BSIM-CMG	72	7nm–20nm	FinFET / multi-gate

Key Parameter Quick Reference

Parameter	Meaning	Typical range
`vth0`	Nominal threshold voltage [V]	NMOS: 0.3–0.5; PMOS: −0.5 to −0.3
`toxe`	Equivalent gate-oxide thickness [m]	1–4 nm (deep submicron)
`u0`	Low-field mobility [m²/Vs]	NMOS: 0.03–0.05; PMOS: 0.01–0.02
`vsat`	Saturation velocity [m/s]	1e5–2.5e5

Full parameter table in references/model_params.md.

Using a Custom PDK Model

If you have your own .lib file (foundry PDK or measured):

Copy it into the project models/ directory.
Find the .model name inside the file (e.g. .model mynmos NMOS level=54).
Instantiate using that name: M1 d g s b mynmos W=... L=...
Configure sweep ranges based on vth0, tox, etc.