O2Micro's Industry Leading Precision Circuit Trimming Method Issued Patent

August 4, 2008. O2Micro® International Limited (NASDAQ®: OIIM; SEHK: 0457), a leading supplier of innovative power management and security components and systems, was issued 14 claims under United States patent number 7,319,346 for its Precision Trimming Method, also referred to as DigitalLaserTrim™, for integrated circuits; a continuation of the invention issued April 2004 under United States patent number 6,720,800.

Precision Trimming methodology is implemented in DC/DC power control, battery cell balancing, and battery charging applications. It also applies to basic circuits used as core building blocks, such as mixed-signal data converters, waveform generators, precision DC output circuits, precision comparators, and many others.

Dr. Alex Hartular, vice president, O2Micro, commented "Benefits of this post packaging trimming methodology include avoidance of problems associated with wafer level trimming methodology, and elimination of package-induced inaccuracies." Dr. Hartular adds, "This patent extends O2Micro's offering of high precision semiconductors, resulting in lower costs and potentially smaller package size for a given precision circuit."


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.

O2Micro International maintains an extensive portfolio of intellectual property with 10,001 patent claims granted, and over 12,000 more pending. The company maintains offices worldwide. Additional company and product information can be found on the company website at www.lxhbw.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. 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 errors in the products. 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. The company assumes no obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise.


Contact Information:
Gary E. Abbott
Director of Investor Relations, O2Micro
Phone: 408.987.5920. x8888
Email: gary.abbott@o2micro.com


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