Patent ID: 11935757
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 15:
16. A method of manufacturing a semiconductor device, comprising:
forming a first planarizing layer over a patterned surface of a substrate, wherein the first planarizing layer comprises a spin-on carbon and an acid;
crosslinking a portion of the first planarizing layer;
forming a second planarizing layer over the first planarizing layer, wherein the second planarizing layer comprises a spin-on carbon, and the second planarizing layer includes no acid generator;
diffusing the acid from the first planarizing layer to the second planarizing layer;
crosslinking a portion of the second planarizing layer;
removing a portion of the second planarizing layer that is not crosslinked; and
forming a third planarizing layer over the second planarizing layer after removing the portion of the second planarizing layer that is not crosslinked.