Patent ID: 6436585
Filing Date: 2002-08-20
Classification: H01L

Abstract:
A method of making a photolithography mask for use in creating an electrical fuse on a semiconductor structure comprising:determining a pattern for a desired electrical fuse, said pattern including a fuse portion of substantially constant width except for a localized narrowed region of the fuse portion at which the electrical fuse is designed to blow; providing a photolithography mask substrate; and creating on said photolithography mask substrate a fuse mask element adapted to absorb transmission of an energy beam, said fuse mask element having a first mask portion of substantially constant width corresponding to the desired electrical fuse pattern portion of substantially constant width, and a second mask portion corresponding to the localized narrowed region of the fuse portion, said second mask portion selected from the group consisting of: a) an additional mask element spaced from the first mask portion, b) a narrowed width portion; and c) a gap in the first mask portion, said second mask portion being of a configuration sufficient to create a latent image of said electrical fuse pattern, including the localized narrowed region of the fuse portion at which the electrical fuse is designed to blow, upon passing said energy beam through said photolithography mask and onto a resist layer.