Based on Image Processing Toolbox of Matlab technique

a new evaluation method of cleaning efficiency is presented in dry laser cleaning particles of silicon wafer surface. Image Processing Toolbox of Matlab is used to recognize optical information of silicon wafer surface before and after laser cleaning and the evaluating programs are developed to count the number of pollution particles on the silicon wafer and to evaluate the cleaning efficiency. The results show that the statistical accuracy of the method is 97.6%

and the laser cleaning accurate reaches 99.2%. The research achievement offers a effective

rapid and accurate new evaluation method.