Patent ID: 8124326

Claim:
A method of patterning positive photoresist, comprising: providing positive photoresist over a substrate; exposing an area of the positive photoresist to a pattern of activating radiation at a dose which is below the Dose To Critical Dimension (CD) of said pattern with said positive photoresist, the pattern dose being less than or equal to 90% of said Dose To CD; flood exposing the area of the positive photoresist to activating radiation at a dose from 1% to 75% of Dose To Clear (E 0 ), sum of the flood dose and the pattern dose being less than said Dose To CD yet effective to resolve the pattern in the positive photoresist upon develop; and after exposing the area to the flood dose and the pattern dose, developing the area of the positive photoresist to resolve the pattern in the positive photoresist.