Milpitas, California. January 31, 2006.

Nanometrics to Present at the Thomas Weisel Partners Technology Conference

Nanometrics, Inc. (Nasdaq: NANO), a leading supplier of advanced integrated and standalone metrology equipment for the semiconductor industry, today announced its participation at the upcoming Thomas Weisel Partners Technology Conference, being held February 6-8, 2006.

Information for the event is as follows:

Event:
Thomas Weisel Partners Technology Conference
Fairmont Hotel, San Francisco, CA

Date:
Monday, February 6, 2006

Time:
Presentation at 10:55 AM PT (1:55 PM ET)

Speakers:
John Heaton, President & CEO
Doug McCutcheon, Executive VP & CFO

An audio-only webcast of the presentation can be accessed from Nanometrics’ investor web page at www.nanometrics.com.

About Nanometrics
Nanometrics is a leader in the design, manufacture and marketing of high-performance process control metrology systems used in semiconductor manufacturing. Nanometrics metrology systems measure various thin film properties, critical circuit dimensions and layer-to-layer circuit alignment (overlay) during various steps of the manufacturing process, enabling semiconductor and integrated circuit manufacturers to improve yields, increase productivity and lower their manufacturing costs. Nanometrics maintains its headquarters in Milpitas, California, with sales and service offices worldwide. Nanometrics is traded on the Nasdaq National Market under the symbol NANO. Nanometrics’ website is: http://www.nanometrics.com.

Contact:
Doug McCutcheon
Nanometrics
408.435.9600