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SunPower CEO, Thomas Werner, to Speak at the Thomas Weisel Partners Alternative Energy Conference
Company to Webcast Presentation Live at http://investors.sunpowercorp.com/events.cfm

SAN JOSE, Calif., June 12, 2006 /PRNewswire-FirstCall via COMTEX News Network/ -- SunPower Corporation (Nasdaq: SPWR), a Silicon Valley-based manufacturer of the world's highest efficiency, commercially available silicon solar cells and panels, today announced that its CEO, Thomas Werner, will deliver a presentation at the Thomas Weisel Partners Alternative Energy Conference on June 15, 2006, at 2:00 p.m. EDT. The event is being held at the offices of Thomas Weisel Partners in New York City. Werner will highlight SunPower's financial and operations successes to date.

A live webcast of the presentation will be available through SunPower's website at http://investors.sunpowercorp.com/events.cfm.

About SunPower

SunPower Corporation designs and manufactures high-efficiency silicon solar cells and solar panels based on an all-back contact cell design. SunPower's solar cells and panels generate up to 50 percent more power per unit area than conventional solar technologies and have a uniquely attractive, all-black appearance. For more information on SunPower or solar technology, please visit the SunPower website at http://www.sunpowercorp.com. SunPower is a majority-owned subsidiary of Cypress Semiconductor Corp. (NYSE: CY).

NOTE: SunPower is a registered trademark of SunPower Corporation. Cypress is a registered trademark of Cypress Semiconductor Corp. All other trademarks are the property of their respective owners.

SOURCE SunPower Corporation

Julie Blunden, Vice President External Affairs, +1-408-240-5577, or Helen Kendrick,
Communications Manager, +1-408-240-5585, or hkendrick@sunpowercorp.com, both for
SunPower Corporation

Copyright (C) 2006 PR Newswire. All rights reserved.

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