Patent ID: 7307018

Claim:
A method of forming a conductive line suitable for decreasing a sheet resistance of the conductive line, the method comprising: providing a substrate having a conductive layer including a upper layer and a lower layer formed thereon; forming a mask layer on the conductive layer; forming a pattemed photoresist layer on the mask layer; using the patterned photoresist layer as a mask, patterning the mask layer; removing the patterned photoresist layer; using the mask layer as a mask, patterning the portion of the upper layer of the conductive layer to form the first line of a first line width; forming a spacer on a sidewall of the first line and on the lower layer of the conductive layer; and removing a portion of the lower layer of the conductive layer not covered by the first line and the spacer to form a second line of a second line width, wherein the spacer serves as a mask.