Mark Litchy is a principle investigator at CT Associates, Inc., where he specializes in particle measurement in high purity liquids and colloidal suspensions as well as aerosols.  He has more than 25 years of experience in particle measurement and control in high purity liquid chemicals, microporous membrane filtration and CMP slurry characterization.  He is the author or co-author of more than 50 publications and presentations and holds 8 patents. He has a M.S. degree in Mechanical Engineering from the University of Minnesota (Minneapolis, MN) and a B.A. degree in Physics from St. John’s University (Collegeville, MN).