Patent ID: 6372412
Filing Date: 2002-04-16
Classification: G03F,H01L

Abstract:
A method of producing an integrated circuit chip comprising:selecting a photoresist composition comprising a negative tone component and an positive tone component, wherein the positive tone component acts at a first actinic energy level and wherein the negative tone component acts at a second actinic energy level, said first and second actinic energy levels being separated by an intermediate range of actinic energy levels; depositing a layer of the selected photoresist material onto a surface, thereby forming a film; exposing a portion of the film through an opening a mask to the first actinic energy level, the range of intermediate energy levels, and the second energy level; and forming a pattern in the film by developing the film, wherein the pattern comprises a photoresist region sandwiched between a first space and a second space, and wherein the photoresist region, less than a full portion of the first space, and less than a full portion of the second space are each aligned under the opening.