Patent ID: 11908681
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B  G | IPC B  H

Claim 0:
1. A semiconductor fabricating system, comprising:
a wafer stage;
a brush assembly, moveably located below the wafer stage and comprising:
a base plate;
an inner brush member positioned on the base plate, the inner brush member comprising first, second, third, and fourth inner protruding portions sequentially arranged around a rotation axis in a sequential order of the first inner protruding portion, the second inner protruding portion, the third inner protruding portion, and then the fourth inner protruding portion; and
an outer brush member surrounding the inner brush member, the outer brush member comprising first, second, third, and fourth outer protruding portions sequentially arranged around the rotation axis in a sequential order of the first outer protruding portion, the second outer protruding portion, the third outer protruding portion, and then the fourth outer protruding portion, wherein a distance between the first and second outer protruding portions of the outer brush member is greater than a distance between the first and second inner protruding portions of the inner brush member, and inner grooves in the inner brush member are shallower than outer grooves in the outer brush member;

a shaft, connected to the base plate;
an actuator, connected to the shaft; and
a controller programmed to send electric signal to the actuator to drive the base plate to rotate around the rotation axis.