Method for removal of photoresist using sparger
View Patent ↗A method of removing photoresist from semiconductor wafers through the use of a sparger plate. According to the inventive method, at least one semiconductor wafer is positioned in a process tank above the sparger plate. A mixture of ozone and deionized water is introduced into the process tank at a position below the sparger plate. The mixture of ozone and deionized water is then introduced across the wafer via the sparger plate at an increased flow velocity while the wafer is submerged in the mixture of deionized water and ozone.
1. A process for removing photoresist from semiconductor wafers comprising:
positioning at least one semiconductor wafer in a process tank above a sparger plate;
introducing a mixture of ozone and deionized water to the process tank at a position below the sparger plate; and
introducing the mixture of ozone and deionized water via the sparger plate at an increased flow velocity across said wafer while said wafer is submerged in said deionized water and ozone.
2. The process according to claim 1 further comprising maintaining the temperature in the processing tank at ambient temperature.
3. The process according to claim 2 wherein the temperature is about 20-21° C.
4. The process according to claim 2 wherein the temperature is above 20-21° C.
5. The process according to claim 1 wherein the mixture of ozone and deionized water is recirculated and flows back into the processing tank.
6. The process according to claim 1 wherein the mixture of deionized water and ozone is recirculated and ozone added so as to keep the concentration of ozone in said mixture about constant.
7. The process according to claim 6 wherein said mixture of deionized water and ozone is agitated via the sparger plate.