Patent ID: 9028915
Filing Date: 2015-05-12
Classification: B05D,G03F,H01L

Abstract:
1. A method comprising: providing a wafer; spinning the wafer during a first cycle at a first speed, while a pre-wet material is dispensed over the wafer; spinning the wafer during the first cycle at a second speed, wherein the first speed is greater than the second speed, while the pre-wet material continues to be dispensed over the wafer; spinning the wafer during a second cycle at the first speed, while the pre-wet material continues to be dispensed over the wafer; spinning the wafer during the second cycle at the second speed, while the pre-wet material continues to be dispensed over the wafer; before spinning the wafer at a third speed, spinning the wafer during a third cycle at the first speed, while the pre-wet material continues to be dispensed over the wafer; spinning the wafer during the third cycle at the second speed, while the pre-wet material continues to be dispensed over the wafer; and spinning the wafer at the third speed, wherein the third speed is greater than the first speed, while a photoresist material is dispensed over the wafer including the pre-wet material.