250 nm process

The 250 nm process (250 nanometer process or 0.25 µm process) is a level of semiconductor process technology that was reached by most manufacturers in the 1997–1998 timeframe.

Products featuring 250 nm manufacturing process

The DEC Alpha 21264A, which was made commercially available in 1999.
The AMD K6-2 Chomper and Chomper Extended. Chomper was released on May 28, 1998.
The AMD K6-III "Sharptooth" used 250 nm.
The mobile Pentium MMX Tillamook, released in August 1997.
The Pentium II Deschutes.
The Pentium III Katmai.
The Dreamcast's CPU and GPU.
The initial version of the Emotion Engine processor used in the PlayStation 2.

Preceded by 350 nm	CMOS manufacturing processes	Succeeded by 180 nm

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Semiconductor device fabrication

MOSFET scaling (process nodes)
020 µm – 1968 010 µm – 1971 006 µm – 1974 003 µm – 1977 1.5 µm – 1981 001 µm – 1984 800 nm – 1987 600 nm – 1990 350 nm – 1993 250 nm – 1996 180 nm – 1999 130 nm – 2001 090 nm – 2003 065 nm – 2005 045 nm – 2007 032 nm – 2009 022 nm – 2012 014 nm – 2014 010 nm – 2016 007 nm – 2018 005 nm – 2020 003 nm – 2022
Future 002 nm ~ 2024
Half-nodes Density CMOS Device (multi-gate) Moore's law Transistor count Semiconductor Industry Nanoelectronics