TSMC Begins Mass Production of 2nm Chips, Marking a New Era in Semiconductor Technology
Written by Nour Abdelkader
TSMC, the world’s largest semiconductor manufacturer, has officially begun mass production of its 2-nanometer (N2) chips in the final quarter of 2025, in line with its previously announced roadmap. The company confirmed the milestone through an update on its official website, stating that the TSMC 2nm (N2) process has entered volume production as planned.
The new node is based on the first generation of Gate-All-Around (GAA) transistors, a major technological shift that delivers significant improvements in performance and power efficiency.
Goodbye FinFET, Welcome GAA Transistors
The GAA architecture represents a fundamental evolution beyond the FinFET transistors used in earlier generations. By fully surrounding the channel from all sides using vertical nanosheets, GAA transistors significantly reduce current leakage and improve drive current.
As a result, chips built on the 2nm process achieve higher performance with improved energy efficiency, making N2 the most advanced manufacturing node in the semiconductor industry to date. TSMC is expected to begin commercial shipments of the second generation of its 2nm technology next year.
Higher Performance and Unprecedented Power Efficiency
Compared with TSMC’s third-generation 3nm process (N3E), the 2nm N2 technology delivers notable gains. It offers performance improvements of 10% to 15% at the same power consumption, or power savings of 25% to 30% at the same performance level.
In addition, transistor density increases by around 15% for mixed designs and up to 20% for logic-only chips. Transistor density remains one of the most important indicators of chip advancement, as smaller nodes allow more transistors to be packed into the same area, directly boosting performance and efficiency.
A Dramatic Leap in Transistor Density
For comparison, Apple’s A13 Bionic chip, built on a 7nm process and used in the iPhone 11, featured a transistor density of roughly 90 to 95 million transistors per square millimeter. This number jumped significantly with the A17 Pro chip, manufactured using a 3nm process for the iPhone 15 Pro, reaching between 220 and 290 million transistors per square millimeter.
With the transition to 2nm, the upcoming A20 Pro processor—expected to power the iPhone 18 Pro Max—is projected to reach a density of approximately 310 to 330 million transistors per square millimeter, highlighting a massive leap in computing capability.
What Comes After 2nm?
TSMC’s ambitions extend well beyond the 2nm node. The company is already preparing for its A16 (16-angstrom) process, which will introduce a new innovation known as Super Power Rail (SPR). This technology moves power delivery to the back side of the chip instead of routing it through the front, allowing transistors to be placed closer together.
By improving power distribution and reducing energy loss, SPR is expected to unlock even higher efficiency and performance in future generations of processors.
