[FORM 6-K O2MICRO INTERNATIONAL LIMITED Grand Pavilion Commercial Centre, West Bay Road P.O. Box 32331 SMB, George Town Grand Cayman, Cayman Islands Form 20-F x Form 40-F ¨ ¨ Note ¨ Note ¨ No x Information furnished on this Form 6-K: 1. Other Events 2.]

[FORM 6-K O2MICRO INTERNATIONAL LIMITED Grand Pavilionmmercial Centre, West Bay Road P.O. Box 32331 SMB, George Town Grandyman,yman Islands Form 20-F x Form 40-F Note Note No x Information furnished on this Form 6-K: 1. Other Events 2. (b) Number 99.1 Press release announcing financial results for the first quarter ended March 31, 2007.]

[================================================================================ ---------- FORM 6-K ---------- ---------- O2MICRO INTERNATIONAL LIMITED ---------- Grand Pavilion Commercial Centre, West Bay Road P.O. Box 32331 SMB, George Town Grand Cayman, Cayman Islands ---------- under cover Form 20-F or Form 40-F. Form 20-F [X] Form 40-F [_] Form 6-K if submitted solely to provide an attached annual report to security holders. foreign private issuer must furnish]

[================================================================================ ---------- FORM 6-K ---------- ---------- O2MICRO INTERNATIONAL LIMITED ---------- Grand Pavilionmmercial Centre, West Bay Road P.O. Box 32331 SMB, George Town Grandyman,yman Islands ---------- underver Form 20-F or Form 40-F. Form 20-F [X] Form 40-F [_] Form 6-K if submitted solely to provide an attached annual report to security holders. foreign private issuer must]