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

Claim 0:
1. A method comprising:
forming a device layer on a substrate;
forming a material layer over the device layer;
forming a protector layer over the material layer;
forming a first patterning layer over the protector layer, wherein a first portion of the protector layer is exposed by the first patterning layer;
removing the first portion of the protector layer;
removing the first patterning layer to expose a second portion of the protector layer;
forming a second patterning layer over the protector layer, wherein the second portion of the protector layer is exposed by the second patterning layer;
removing the second portion of the protector layer; and
patterning the material layer by using the protector layer as a mask, wherein a portion of the device layer is exposed after patterning the material layer.