Methods of planarization
First Claim
Patent Images
1. A method of planarizing, comprising:
- providing an article comprising a substrate and one or more structures disposed on the substrate;
forming a first material over the article;
forming a second material over the first material;
removing at least a portion of the second material using a polishing pad and a liquid; and
removing at least a portion of the first material,wherein the second material is harder than the first material and none of the first material is removed when the at least a portion of the second material is removed.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of planarization allows for the use of chemical mechanical polishing (CMP) in starting structures having films not generally suitable for CMP processes. Two material layers are formed over a starting structure, and the upper layer is planarized in a CMP process. A nonselective etch is then used to transfer the planar topography to the lower level.
-
Citations
14 Claims
-
1. A method of planarizing, comprising:
-
providing an article comprising a substrate and one or more structures disposed on the substrate; forming a first material over the article; forming a second material over the first material; removing at least a portion of the second material using a polishing pad and a liquid; and removing at least a portion of the first material, wherein the second material is harder than the first material and none of the first material is removed when the at least a portion of the second material is removed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A method of planarizing, comprising:
-
providing an article comprising a substrate and one or more structures disposed on the substrate, the structures providing the article with a non-planar topography; forming a first material over the article; forming a second material over the first material, wherein the second material is harder than the first material; removing at least a portion of the second material using a polishing pad and a liquid, wherein removing the portion of the second material provides the second material with a substantially planar topography; removing an additional portion of the second material and at least a portion of the first material using nonselective etching conditions, wherein none of the second material remains after removing the portion of the first material, and wherein the first material is provided wit a substantially planar topography; and removing more of the first material by a subsequent etching of the first material, wherein none of the first material is removed when the at least a portion of the second material is removed. - View Dependent Claims (13, 14)
-
Specification