Patent ID: 7033941
Filing Date: 2006-04-25
Classification: H01L

Abstract:
1. A method of producing semiconductor devices from a semiconductor substrate, comprising: depositing a dielectric layer on top of a substrate having a plurality of areas elevated from a reference level, the plurality of elevated areas being separated by areas lower than the reference level, and each of the plurality of elevated areas having a first layer of material resistant to chemical mechanical polishing (CMP), wherein said depositing fills up at least said lower areas; depositing a second layer of a material resistant to CMP on top of the said dielectric layer; removing at least a portion of said second layer and a portion of said dielectric layer from respective areas situated above the elevated areas so as to form a trench on the dielectric layer, wherein upon such removal said second layer partly overlaps each elevated area; and performing, CMP wherein the CMP is terminated upon reaching the location of said first and second CMP resistant layers, wherein the portions of the second layer and the dielectric layer are removed before the CMP.