O2Micro's 722 Patent Case Against MPS Will Head to Trial for Injunction

February 12, 2007. O2Micro® International Limited (NASDAQ®: OIIM; SEHK: 0457), a leading supplier of innovative power management and security components and systems, announced that the United States District Court for the Northern District of California issued its claim construction order and summary judgment rulings in O2Micro's litigation involving Monolithic Power Systems, Inc. (MPS).

Judge Wilken found that defendants provided no good cause to alter the previous claim constructions of the Court and Judge Ward. Judge Wilken also denied all MPS summary judgment challenges of non-infringement and invalidity of O2Micro's U.S. Patent Number 6,396,722 (the 722 Patent) including MPS' best mode challenge.

Judge Wilken rejected O2Micro's current damages claim in the case based on the 722 Patent but allowed O2Micro to continue to pursue permanent injunction against MPS products. O2Micro will continue to pursue damages in its other litigation involving the 722 Patent and other patents and will assess appeal possibilities at conclusion of trial.

Trial is currently scheduled to begin April 30, 2007.

About O2Micro

Founded in April 1995, O2Micro develops and markets innovative power management, and security components and systems for the Computer, Consumer, Industrial, and Communications markets. Products include Intelligent Lighting, Battery Management, Power Management, SmartCardBus® and Security products, such as VPN/Firewall system solutions. The company maintains offices worldwide. Additional company and product information can be found on the company website at www.o2micro.com.

O2Micro, the O2Micro logo, SmartCardBus, and combinations thereof are registered trademarks of O2Micro. All other trademarks are the property of their respective owners.

Statements made in this release that are not historical, including statements regarding O2Micro's or management's intentions, hopes, beliefs, expectations, representations, projections, plans or predictions of the future, are forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. You can identify these forward-looking statements by terminology such as "may," "will," "expects," "should," "could," "plans," "intends," "believes," "predicts," or "continue" or the negative of these terms and other comparable terminology. These forward-looking statements include, without limitation, statements regarding future litigation activities, results and plans. Such statements involve risks and uncertainties that may cause actual results to differ materially from those set forth in these statements. Factors that could cause actual results to differ materially include risks and uncertainties such as reduced demand for products of electronic equipment manufacturers which include O2Micro's products due to adverse economic conditions in general or specifically affecting O2Micro's markets, technical difficulties and delays in the developments process, and adverse orders, rulings, judgments, verdicts, delays or adverse administrative proceeding results. You are also referred to the Form F-1 in connection with the company's initial public offering in August 2000, Form F-3 in connection with the company's public offering in November 2001, and the annual reports on Form 20-F, which identify important risk factors that could cause actual results to differ from those contained in the forward-looking statements. We assume no obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise. You are cautioned not to place undue reliance on these forward-looking statements which apply only as of the date hereof.

Contact Information:
Mitchell Benus
Director of Investor Relations, O2Micro
Phone: 408.332.1749
Email: mitchell.benus@o2micro.com

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