Patent ID: 6475693
Filing Date: 2002-11-05
Classification: G03F

Abstract:
A positive-working radiation-sensitive resin composition containing (i) a radiation-sensitive novolak resin comprising a reaction product between an alkali-soluble novolak resin from which low-molecular-weight components comprising dimers, trimers and tetramers have been removed by fractional treatment and an o-naphthoquinonediazide compound, or a product obtained by removing low-molecular-weight components comprising dimers, trimers and tetramers by fractional treatment from a reaction product between an alkali-soluble novolak resin and an o-naphthoquinonediazide compound, and (ii) a low-molecular compound represented by the general formula (I) and having phenolic hydroxyl group or groups: wherein R1, R2, R3, R4, R5, R6 and R7 each represents independently H, a C1 to C4 alkyl group, a C1 to C4 alkoxyl group, a Cyclohexyl group or a group represented by the formula: wherein R8 represents H, a C1 to C4 alkyl group, a C1 to C4 alkoxyl group or a cyclohexyl group; each of m and n is 0, 1 or 2; each of a, b, c, d, e, f, g and h is 0 or an integer of 1 to 5 satisfying a+b&lE;5, c+d&lE;5, e+f&lE;5, and g+h&lE;5; and I is 0, 1 or 2; wherein said fractional treatment comprises removal of substantial amounts of said dimers, trimers and tetramers by precipitation.