Patent ID: 6869858
Filing Date: 2005-03-22
Classification: H01L

Abstract:
1. A method, comprising: forming a topographic portion having in an upper side thereof an aperture configuration which includes at least one aperture, and which defines first and second mesas that are part of the topographic portion and that project upwardly to approximately the same height the second mesa being wider than the first mesa; forming over the topographic portion a fill layer that fills each aperture to a height at least as high as the tops of the first and second mesas; selectively etching the fill layer at a location disposed above the second mesa to remove a portion of the material of the fill layer disposed over the second mesa; thereafter etching the fill layer above the aperture configuration and above the first and second mesas, the first and second mesas each being left with a residue portion of the fill layer thereon; and planarizing the fill layer in a manner which removes from each of the mesas the residue portion of the fill layer, and which planarizes the material of the fill layer within each aperture.