Patent ID: 7105925
Filing Date: 2006-09-12
Classification: H01L

Abstract:
1. A microelectronic structure comprising: a substrate layer coupled with a series of metal layers which form a surface of alternating metal layers and intermetal substrate gaps, each of the metal layers extending beyond the level of the intermetal substrate gaps around it by a protrusion height less than about 1,200 anstroms which is a function of the adjacent intermetal substrate gap dimensions, the protrusion height being formed by differential planarization; wherein the series of metal layers includes a first metal layer and a second metal layer separated by a first width, there being no metal layer between portions of the first and second metal layers that extend beyond the level of the intermetal substrate gaps around them; wherein the series of metal layers includes a third metal layer and a fourth metal layer separated by a second width smaller than the first width, there being no metal layer between portions of the third and fourth metal layers that extend beyond the level of the intermetal substrate gaps around them; wherein the first and second metal layers extend beyond a first intermetal substrate gap between the first and second metal layers by a first protrusion height; and wherein the third and fourth metal layers extend beyond a second intermetal substrate gap between the third and fourth metal layers by a second protrusion height smaller than the first protrusion height.