Patent ID: 7291562

Claim:
A method to create topography in material deposited above a wafer substrate, the method comprising: etching a first deposited layer to form a dummy structure above the substrate, the dummy structure adapted to form excess dielectric volume on top of the dummy structure during dielectric deposition; depositing first dielectric material having a top surface above the first deposited layer, wherein a first height of the top surface of first dielectric material directly above the dummy structure is higher above the substrate than a second height of the top surface of first dielectric material adjacent to the dummy structure; performing a first CMP step on the first dielectric material, wherein, after the first CMP step, the first height remains higher than the second height; and, after the first CMP step, depositing a second layer having a top surface above the first dielectric material, wherein a third height of the top surface of the second layer directly above the dummy structure is higher above the substrate than a fourth height of the top surface of the second layer adjacent to the dummy structure.