Patent ID: 11926017
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC B  C  H | IPC B  C  H

Claim 16:
17. A cleaning process monitoring system, comprising:
a rinsing solution supply containing a rinsing solution;
a cleaning solution supply containing a cleaning solution, wherein the cleaning solution comprises a directional and focused stream of gaseous carbon dioxide (CO2);
a cleaning container comprising an inlet for first receiving the rinsing solution and then the cleaning solution, and an outlet for draining a waste solution;
a particle detector coupled to the outlet and configured to measure a plurality of particle parameters associated with the waste solution so as to provide a real-time monitoring of the cleaning process, wherein the particle detector comprises a plurality of channels having different sizes from one another, wherein each of the plurality of channels is configured for detecting particles of respective different sizes;
a pump coupled to the cleaning container through the outlet and configured to provide suction to draw the waste solution through the cleaning system; and
a controller coupled to the pump and the particle detector and configured to receive the plurality of particle parameters from the particle detector and to control the cleaning system.