Company:  MATTSON TECHNOLOGY INC (MTSN)
Form Type:  4/A
Filing Date:  2/23/2012 
CIK:  0000928421 
Address:  47131 BAYSIDE PARKWAY 
City, State, Zip:  FREMONT, California 94538 
Telephone:  510 657 5900 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$2.28  
Change: 
0.10 (4.59%)  
Trade Time: 
Jun 19  
Market Cap: 
$133.91M
Description of Business
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  FORM 4/A
    NAME AND TITLE
    NON DERIVATIVE SECURITIES
    DERIVATIVE SECURITIES
    EXPLANATIONS AND REMARKS
    REPORTING OWNERS
    SIGNATURES