— Test & Measurement World magazine selects ClearVue™ for its technological advancement.

North Reading, Massachusetts — December 22, 2005 - Teradyne^®, Inc. (NYSE:TER), an industry leading manufacturer of high-performance PCB (Printed Circuit Board) test and inspection systems, was selected by Test & Measurement World magazine to receive the ‘Best in Test’ award for its innovative ClearVue™ 3D X-Ray inspection technology. The prestigious award, which annually honors test industry products that offer a significant technological advancement to the market, will be presented at a ceremony held during the APEX Conference and Exposition in Anaheim, California on February 9, 2006.

Teradyne announced ClearVue last March and has since sold several XStation MX inspection stations containing the technology to major PCB manufacturers in Asia, Europe and North America. ClearVue uses a patented off-center tomosynthesis imaging technique that more accurately exposes lead-free solder problems and better inspects densely packed single- or double-sided boards containing BGA-style components. Unlike conventional X-Ray inspection systems, ClearVue functions using a stationary X-Ray source and detector and does not require rotating mechanical parts or complex algorithms. More importantly, ClearVue enables up to 40 times fewer false failures, much improved reliability, higher repeatability and faster cycle times (i.e., throughputs that allow the XStation MX to be used and integrated with other in-line production test systems).

Paul Groome, manager of Teradyne’s AXI products group, said, “The beauty of our ClearVue lies in the increased quality, efficiency and simplicity it brings to automated X-Ray inspection. Quality managers and production line controllers will both benefit from its unique ability to identify material defects more quickly and with absolute certainty.” Technical information about Teradyne’s ClearVue X-Ray technology is available online at www.teradyne.com/axi/clearvue.html, where viewers can register to watch a recorded technical presentation of the ClearVue technology. More information about the Test & Measurement World award is online at www.tmworld.com/awards.

About Teradyne

Teradyne (NYSE:TER) is a leading supplier of Automatic Test Equipment. The company's products deliver competitive advantage to the world's leading semiconductor, electronics, automotive and network systems companies. In 2004, Teradyne had sales of $1.8 billion, and currently employs about 4,100 people worldwide. For more information, visit www.teradyne.com. Teradyne, SafeTest and UltraPin are trademarks or registered trademarks of Teradyne, Inc.

Editorial Contact:
Peter Predella
Marketing Communications Manager
Teradyne, Inc.
+1.978.370.1401
peter.predella@teradyne.com