Patent ID: 7608382
Filing Date: 2009-10-27
Classification: G03F,Y10S

Abstract:
1. A photoresist composition comprising a polymer having a desired dissolution rate, said polymer comprising at least one repeat unit derived from a polycyclic olefin monomer having a desired exo isomer mole percent, where the desired exo isomer mole percent is greater than or less than an expected exo isomer mole percent for the polycyclic olefin monomer from which the repeat unit is derived, such expected exo isomer mole percent based on the thermodynamic equilibrium of the isomers of such monomer that are obtained from a Diels-Alder reaction used to form such monomer, wherein said polycyclic olefin monomer comprises at least one polycyclic olefin monomer represented by the following general formula:  wherein n is an integer from 0 to 5, and R′ is selected from hydrogen or an acid labile group, and wherein said desired exo isomer mole percent of said polycyclic olefin monomer is selected from less than about 15 mole percent and greater than about 25 mole percent, based on total moles of exo isomer and endo isomer.