Foundary — Open-source PDK collection for iEDA / iEDA-3D

Collected process design kits used with iEDA and iEDA-3D.

Each directory keeps its upstream license; see per-directory LICENSE / README where present.

2D PDKs

Directory	Node	License	Notes
sky130	130nm	Apache-2.0	SkyWater; iEDA gcd flow verified
ics55	55nm	Apache-2.0	iEDA gcd flow verified
nangate45	45nm	open (NCSU FreePDK45)	OpenROAD-format
asap7	7nm	open (ASU)	predictive PDK
ihp130	130nm	open (IHP SG13G2)	placeholder — see IHP-Open-PDK

Homogeneous 3D PDKs (same process, 2-tier F2F)

Directory	Base	Status	Notes
nangate45_3D	nangate45	research platform	Open3DBench-compatible NanGate45_3D
nangate45_3D_HS	nangate45_3D	HS-3D benchmark	Fixed stack / tracks for native-3D iEDA-3D flows
asap7_3D_RVT	asap7	candidate	Derived 3D view; hybrid-bond RC synthetic
ics55_3D_RVT	ics55	candidate	Derived 3D view; hybrid-bond RC synthetic
sky130_3D_HD	sky130	candidate	Derived 3D view; hybrid-bond RC synthetic

Candidate 3D views are generated for logic/placement experiments. Signoff decks (RCX/PDN/DRC/LVS) are not foundry-calibrated; related metrics are NOT_COMPARABLE.

Heterogeneous 3D PDKs (cross-process interop)

Face-to-face 2-tier interoperability models for iEDA-3D cross-PDK experiments. Upper-tier cells use site-normalized abstracts on the bottom process coordinate system. Status: EXECUTABLE_INTEROP_MODEL — usable for synth / place / route diagnostics, not for PPA or signoff conclusions.

Directory	Bottom (tier0)	Upper (tier1)	Coord. system
nangate45_sky130_3D_HET	nangate45_3D_HS	sky130_3D_HD	nangate45
nangate45_ics55_3D_HET	nangate45_3D_HS	ics55_3D_RVT	nangate45
nangate45_asap7_3D_HET	nangate45_3D_HS	asap7_3D_RVT	nangate45
ics55_sky130_3D_HET	ics55_3D_RVT	sky130_3D_HD	ics55

Each HET package typically includes:

• lef/tech_3d.lef, lef/cells_3d.lef — merged tech + cell abstracts
• lib_bottom/, lib_upper/, lib/ — Liberty views
• stack/heterogeneous_f2f_2tier.json — stack definition
• PDK_MANIFEST.json, source.lock.json — provenance / hashes
• tracks_ieda.tcl — iEDA track config

Layout

Foundary/
├── sky130 / ics55 / nangate45 / asap7 / ihp130   # 2D
├── nangate45_3D / nangate45_3D_HS                # homogeneous 3D (Nangate)
├── asap7_3D_RVT / ics55_3D_RVT / sky130_3D_HD    # derived homogeneous 3D
└── *_3D_HET                                      # heterogeneous interop views

Disclaimer

These kits are for academic / open-source EDA research. Heterogeneous and derived 3D views are interoperability models, not manufacturable foundry releases.