Patent ID: 11923210
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method comprising:
immersing a wafer in a bath in a bath region within a cleaning chamber;
removing the wafer out of the bath region, through a solvent and then into a gas located in a drying region within the cleaning chamber;
determining that a first parameter value from the gas exceeds a first predetermined threshold value;
determining that a second parameter value from the gas exceeds a second predetermined threshold value, the second predetermined threshold value being a different type than that of the first predetermined threshold value; and
performing a first remediation in response to determining that the first parameter value exceeds the first predetermined threshold value and performing a second remediation in response to determining that the second parameter value exceeds the second predetermined threshold value, the second remediation being a different type than that of the first remediation,
wherein the first predetermined threshold value comprises a first value representing a threshold amount of NH3 within the gas in the drying region and the first remediation comprises increasing a concentration of N2 in the drying region, and
wherein the second predetermined threshold value comprises a second value representing a threshold amount of a volatile organic compound (VOC) within the gas in the drying region and the second remediation comprises introducing the solvent as a vapor into the drying region.