2004 News Releases

"FOR IMMEDIATE RELEASE"

MOSAID Announces Change in General Counsel

OTTAWA, Ontario, Canada – April 21, 2004 – MOSAID Technologies Incorporated (TSX: MSD) today announced that William Middleton, General Counsel and Corporate Secretary, has resigned effective April 23, 2004, to join Nygard International Group as Vice President, Legal Services and General Counsel; and that James Skippen is returning to MOSAID as Senior Vice President, Patent Licensing and General Counsel.

"We are grateful to Bill for his significant contributions over the past three and a half years," said George Cwynar, President and Chief Executive Officer of MOSAID. "We are sorry to lose him, but certainly wish him every success in his new position."

"At the same time, we are pleased to welcome Jim back to MOSAID," continued Cwynar. "Jim had served as MOSAID's General Counsel for seven years before leaving for private practice in 2003. He will now again lead MOSAID's patent licensing activity and the assertion of our intellectual property rights in the courts."

About MOSAID
MOSAID Technologies Incorporated is an independent semiconductor company operating through two divisions:

• Intellectual Property – a developer and licensor of memory intellectual property.
• Systems – the leading supplier of engineering memory test and analysis systems to memory manufacturers, foundries and fabless chip companies around the world.

Founded in 1975, MOSAID is based in Ottawa, Ontario, Canada, with offices in 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, Investor Relations & Communications 613-599-9539 x1205 vincent@mosaid.com

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