Patent ID: 11862472
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC H  B  C | IPC B  C  H

Claim 19:
20. A method for forming a semiconductor device, comprising:
depositing a dielectric layer over a semiconductor structure and an area outside the semiconductor structure, wherein the semiconductor structure comprises a sloped side;
removing, using an etch mask, a part of the dielectric layer over the semiconductor structure, such that a topography of the dielectric layer comprises a protrusion above the sloped side of the semiconductor structure, and a step height above the area outside of the semiconductor structure; and
polishing the dielectric layer using an auto-stop slurry until the protrusion and the step height of the topography of the dielectric layer are flattened, wherein the auto-stop slurry comprises a ceria-based abrasive.