250 nanometer

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

250 nm is also within the Ultra Violet (UV) light spectrum. 250 nm has been shown to be very effective at killing bacteria.^[1]

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 CPU and GPU.
The initial PlayStation 2's Emotion Engine CPU.

References

↑ 1937-, Bolton, James R., (2008). The ultraviolet disinfection handbook. Cotton, Christine A. (Christine Anne) (1st ed.). Denver, CO: American Water Works Association. ISBN 9781583215845. OCLC 707936933.

Preceded by 350 nm	CMOS manufacturing processes	Succeeded by 180 nm

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[1] 1937-, Bolton, James R., (2008). The ultraviolet disinfection handbook. Cotton, Christine A. (Christine Anne) (1st ed.). Denver, CO: American Water Works Association. ISBN 9781583215845. OCLC 707936933.

Semiconductor manufacturing processes

10 µm.0 – 1971 06 µm.0 – 1974 03 µm.0 – 1977 01.5 µm – 1982 01 µm.0 – 1985 800 nm – 1989 600 nm – 1994 350 nm – 1995 250 nm – 1997 180 nm – 1999 130 nm – 2001 090 nm – 2004 065 nm – 2006 045 nm – 2008 032 nm – 2010 022 nm – 2012 014 nm – 2014 010 nm – 2017 007 nm – 2018 005 nm – ~2020
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