Patent ID: 9735011
Date: 2017-08-15
CPC Classifications: G03F,H01L

Claim:
1. A method for fabricating a metal interconnect structure, comprising: forming a reticle having a metal line pattern region and at least a scattering bar by an optical proximity correction process, wherein the metal line pattern region includes a plurality of metal line patterns; providing a first dielectric layer and at least one conductive via in the first dielectric layer, on a semiconductor substrate; placing the reticle over the semiconductor substrate, used for a photo-exposure process, such that the scattering bar on the reticle is aligned next to the conductive via on the semiconductor substrate; and forming a plurality of metal lines, corresponding to the plurality of metal line patterns on the reticle, on the first dielectric layer and on a top surface of the conductive via to overlap with the conductive via on the semiconductor substrate.