Patent ID: 6100158
Filing Date: 2000-08-08
Classification: H01L

Abstract:
A method of manufacturing an alignment mark formed in a substrate having a device region and an alignment mark region, wherein the device region is higher than the alignment mark region and the device region comprises an active region, the method comprising the steps of:forming an isolation structure in the substrate at the edge of the alignment mark region and forming a first dielectric layer over a portion of the substrate at the alignment mark region, simultaneously;forming a conductive layer over the substrate;removing a portion of the conductive layer to expose the first dielectric layer at the alignment mark region;patterning the remaining conductive layer to form a component at the active region;forming a second dielectric layer with a smooth surface over the substrate to cover the component; andforming a wire on the second dielectric layer, wherein a distance between the wire and the alignment mark region is larger than a distance between the component and the alignment mark region.