2005 News Releases

"FOR IMMEDIATE RELEASE"

MOSAID Files Notice of Appeal of Summary Judgement Ruling in Infineon Litigation

OTTAWA, Ontario, Canada – November 25, 2005 - MOSAID Technologies Incorporated (TSX:MSD) today announced that it has filed a Notice of Appeal in its litigation with Infineon Technologies. The Notice of Appeal effectively starts the appeal process of the New Jersey summary judgment ruling in the Infineon litigation. The appeal will be decided by the Court of Appeals for the Federal Circuit.

Pursuant to an Order of the Northern District of California District Court on October 27, 2005, all remaining issues in the case are stayed pending the outcome of the appeal. Following the appeal the case will be transferred back to the Northern District of California District Court for trial.

About MOSAID
MOSAID Technologies Incorporated makes memory better through the development and licensing of intellectual property and the supply of memory test and analysis systems to semiconductor manufacturers, foundries and fabless semiconductor companies around the world.

Founded in 1975, MOSAID is based in Ottawa, Ontario, Canada, with offices in Sunnyvale and Santa Clara, California; Newcastle upon Tyne, U.K; and Tokyo, Japan. For more information, visit the Company's web site at www.mosaid.com.

Forward Looking Information
This document may contain forward-looking statements relating to the Company’s operations or to the environment in which the Company operates. Such statements are based on current expectations that are subject to a variety of risks and uncertainties that are difficult to predict and/or beyond MOSAID’s control. Actual results may differ materially from those expressed in any forward-looking statements, due to factors such as customer demand and timing of purchasing decisions, product and business mix, competitive products, pricing pressures as well as general economic and industry conditions. MOSAID assumes no obligation to update these forward-looking statements, or to update the reasons why actual results could differ from those reflected in any forward-looking statements. Additional information identifying risks and uncertainties is contained in other public filings with the Ontario Securities Commission.

For more information, please contact:

Investor Inquiries Heidi Vincent Director, Communications & Investor Relations 613-599-9539 x1205 vincent@mosaid.com

Media Inquiries Sara Haskill Communications Specialist 613-599-9539 x1228 haskill@mosaid.com