Sony Corporation is 9th Licensee of MOSAID Patent Portfolio

OTTAWA, Ontario - April 25, 2003 - MOSAID Technologies Incorporated (TSE:MSD) today announced that it has signed a worldwide, non-exclusive patent licensing agreement with Sony Corporation. Under the terms of this agreement financial details cannot be disclosed.

Sony Corporation is a leading manufacturer of audio, video, communications and information technology products for the consumer and professional markets. It is well known for consumer brands such as PlayStation®, Walkman®, MiniDisc, and the Memory Stick®IC. Sony also manufacturers IT products, including VAIO®, FD Trinitron®, and CLIÉ™, as well as professional products highlighted by the HDCAM® 24-P, Digital Betacam® and DVCAM® VTR and camera formats.

"We are pleased to announce that Sony, a leader in consumer electronics, has licensed MOSAID's patent portfolio for use within its semiconductor products," said George Cwynar, President and Chief Executive Officer for MOSAID. "Sony uses embedded memory in a number of its consumer electronics products such as PlayStation2®. Embedded memory is one of the key applications for a number of MOSAID patents. We believe this agreement with Sony attests to the strength of our intellectual property licensing program as it expands further into this exciting new market."

MOSAID believes all companies that manufacture mainstream DRAM products, including single and double data rate (DDR) synchronous DRAM, as well as Rambus® DRAM, use its patented circuit technology. MOSAID has also found its patented circuit technology incorporated in the embedded DRAM products of a number of major semiconductor manufacturers.

To date, MOSAID has signed nine patent licensing agreements with many leading semiconductor manufacturers including Fujitsu, NEC, Toshiba, Hitachi, Mitsubishi Electric, Oki Electric, Matsushita, Winbond Electronics and Sony Corporation. MOSAID's ability to broaden its licensing opportunities is supported by its growing portfolio of 486 patents issued and pending. There are currently a total of 11 semiconductor manufacturers on notice for patent infringement and MOSAID is engaged in licensing discussions with several of these companies.  

About Sony Corporation
Sony Corporation, headquartered in Tokyo, is a leading manufacturer of audio, video, communications, and information technology products for the consumer and professional markets. Its music, motion picture, television, computer entertainment, and online businesses make Sony one of the most comprehensive entertainment companies in the world. Sony recorded consolidated annual sales of over $56.9 billion for the fiscal year ended March 31, 2002, and it employs 168,000 people worldwide. For more information, visit the Sony Corporation homepage at www.sony.com

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

• Semiconductor - a fabless provider of networking chips
• Intellectual Property - a licensor of intellectual property to semiconductor manufacturers worldwide
• Systems - the leading supplier of engineering memory test and analysis systems to memory manufacturers, foundries and fabless chip companies.

Founded in 1975, MOSAID is based in Ottawa, Ontario, Canada, with offices in Santa Clara, California; Newcastle upon Tyne, U.K; and Tokyo, Japan.

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.