Semiconductor process node names are marketing labels that only loosely describe transistor size.
A node name is not a ruler. TSMC N3, Samsung 3 nm, Intel 18A, and older 14 nm or 7 nm labels cannot be compared by the number alone. Real comparisons require density, performance, power, SRAM behavior, interconnect stack, design rules, yield, voltage range, libraries, and packaging ecosystem.
| Comparison metric | What it reveals | Why node name alone misses it |
|---|---|---|
| Logic density | How many standard cells fit in an area | Libraries and design rules change the result |
| SRAM density | Memory bitcell scaling | SRAM often scales differently from logic |
| Performance and power | Speed at a given voltage or power | Depends on devices, wires, and libraries |
| Yield and maturity | How many good die emerge | A dense node can still be commercially weak |
| Ecosystem readiness | IP, tools, packaging, and sign-off support | Product teams need more than transistors |
Foundry process comparison is therefore contextual. The best node for a chip is the one that meets product goals with acceptable cost, schedule, yield, IP availability, and supply confidence.
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