Text this: Characterization of oxide interface charges in trench field stop IGBT

  ______    ______  __    __   __   __   _    _   
 /_   _//  /_   _// \ \\ / //  \ \\/ // | \  / || 
 `-| |,-    -| ||-   \ \/ //    \ ` //  |  \/  || 
   | ||     _| ||_    \  //      | ||   | .  . || 
   |_||    /_____//    \//       |_||   |_|\/|_|| 
   `-`'    `-----`      `        `-`'   `-`  `-`