Thanks to all replied my question related with thick wafers. Mehmet. *************************** University of Minnesota Thermal Management of Electronic Systems Department of Mechanical Engineering 111 Church Street, Minneapolis MN 55455 USA Office/LAB: ME458 Phones: (612) 626-9551 Office/LAB 625-2612 Microtechnology Laboratory 378-2747 Home Fax: (612) 624-1398 http://webster.me.umn.edu/~arik Stay cool, Listen CURE, and Have a nice spring *********************************************************