Patent ID: 7063939

Claim:
A method for high aspect ratio pattern transfer of positive photoresist application comprising the steps of: (1) obtaining a moldboard being pervious to light and having a protruding-and-recessing figure and forming a masking layer by way of sputtering deposition of a masking material on said moldboard; (2) after solidifying said masking layer, grinding the masking layer on the protruding part of said figure of said moldboard making said protruding part pervious to light; (3) obtaining a substrate applied with positive photoresist and then urging the mold at a molding pressure into the film creating a thickness contrast pattern in the film, wherein the molding pressure is sufficiently high to transfer the features to the film and the molding pressure causes a local deformation in the mold which is less than the mold pattern lateral dimension with said substrate that has said protruding-and-recessing figure for further processing Step and Flash; (4) after finishing said Step and Flash process, removing said moldboard from said substrate; and (5) with a developer, washing exposed portions of the thin film covered with said positive photoresist on said substrate to show the unexposed portion whereby produces high aspect ratio pattern.