Patent ID: 11901188
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 7:
8. A method comprising:
forming a device layer over a substrate;
forming a material layer over the device layer;
forming a protector layer over the material layer, wherein a first portion of the material layer is exposed by the protector layer after the forming of the protector layer over the material layer;
forming a first patterned material layer over the protector layer, wherein the first portion of the material layer is exposed by the first patterned material layer;
removing the first portion of the material layer;
removing the first patterned material layer;
forming a second patterned material layer over the protector layer, wherein a second portion of the material layer is exposed by the second patterned material layer after the forming of the second patterned material layer over the protector layer;
removing the second portion of the material layer;
removing the second patterned material layer; and
patterning the device layer while using the material layer as a mask.