Aluminum-plastic composite structure

Abstract

An aluminum-plastic composite structure includes an aluminum portion and a plastic portion. The aluminum portion defines a plurality of micro grooves by ultraviolet lithography. The plastic portion is integrally formed on the aluminum portion and substantially filling in the micro grooves. A width of each micro groove is in a range from 0.02 millimeters to 0.05 millimeters. A depth of each micro groove is in a range from 0.2 millimeters to 0.25 millimeters.

What is claimed is: 
     
         1 . An aluminum-plastic composite structure comprising;
 an aluminum portion, the aluminum portion defining a plurality of micro grooves by ultraviolet lithography;   a plastic portion, the plastic portion integrally formed on the aluminum portion and substantially filling in the micro grooves; wherein a width of each micro groove is in a range from about 0.02 to about 0.05 millimeters, and a depth of each micro groove is in a range from about 0.2 millimeters to about 0.25 millimeters.   
     
     
         2 . The aluminum-plastic composite structure of  claim 1 , wherein a ratio of the depth to the width is equal to or greater than about 10. 
     
     
         3 . The aluminum-plastic composite structure of  claim 1 , wherein the aluminum portion is a sheet, the depth of each micro groove is equal to or less than about 80% of the thickness of the aluminum portion where the micro groove are defined.