Patent ID: 6044007
Filing Date: 2000-03-28
Classification: G03F

Abstract:
A data storage medium containing mask layout data including optical proximity correction for writing desired mask feature data onto a mask, comprising:a first data portion corresponding to an interior corner of a substantially L-shaped portion of a feature having a first length and a second length which intersect at a vertex of a substantially right angle to form the interior corner, wherein the first data portion includes a stepped inner serif at the vertex of the interior corner for providing optical proximity correction,wherein the stepped inner serif includes a first inner serif having a first length extending from the vertex of the interior corner along each length of the L-shaped portion, and a first width which extends into each length of the L-shaped portion,the stepped inner serif further including a second inner serif having a second length extending from the first inner serif toward the vertex and into the L-shaped portion and along each length of the L-shaped portion, and having a second width which extends into each length of the first inner serif; ora second data portion corresponding to an exterior corner of a substantially L-shaped portion of a feature having a first length and a second length which intersect at substantially a right angle to form the exterior corner, wherein the second data portion includes a stepped outer serif at the vertex of the exterior corner for providing optical proximity correction,wherein the stepped outer serif includes a first outer serif having a first length extending from the vertex of the exterior corner along each length of the L-shaped portion, and a first width which extends out from each length of the L-shaped portion,the stepped outer serif further including a second outer serif having a second length extending from the first outer serif toward the vertex and out from the L-shaped portion and along each length of the L-shaped portion, and having a second width which extends out from each length of the first outer serif,wherein the stepped inner serif and the stepped outer serif maintain optical proximity correction data despite mask data push utilized in writing the mask layout data to form the mask feature, thereby providing an L-shaped portion of the feature in a mask having a substantially right angle interior corner or exterior corner.