Patent ID: 7651829
Filing Date: 2010-01-26
Classification: G03F,Y10S

Abstract:
1. A method for preparing a polymer for a positive resist material, the polymer comprising at least one monomer unit selected from a group consisting of a monomer unit (A), a monomer unit (B) and a monomer unit (C) represented by the following formula (1):  wherein R having a glass transition temperature (Tg) of 100° C. or greater; and the method comprising the steps of: preparing a polysilsesquioxane by hydrolysis and condensation at a temperature from 0 to 100° C. of a monomer or monomers corresponding to the selected monomer unit and being selected from monomers represented by the following formula (2):  wherein X may be the same or different and each represents a C dehydrating the obtained polysilsesquioxane; and maturing the dehydrated polysilsesquioxane under an anhydrous condition at a temperature from 80 to 200° C. in the presence of a basic catalyst so as to heighten a condensation degree of the polysilsesquioxane.